WO2024013759A1 - Method for preparation of novel ziegler-natta catalyst for olefin polymerization - Google Patents
Method for preparation of novel ziegler-natta catalyst for olefin polymerization Download PDFInfo
- Publication number
- WO2024013759A1 WO2024013759A1 PCT/IN2023/050106 IN2023050106W WO2024013759A1 WO 2024013759 A1 WO2024013759 A1 WO 2024013759A1 IN 2023050106 W IN2023050106 W IN 2023050106W WO 2024013759 A1 WO2024013759 A1 WO 2024013759A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- formula
- catalyst
- alkyl group
- ziegler
- internal donor
- Prior art date
Links
- 239000011954 Ziegler–Natta catalyst Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000006116 polymerization reaction Methods 0.000 title claims description 17
- 150000001336 alkenes Chemical class 0.000 title claims description 9
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 title claims description 7
- 238000002360 preparation method Methods 0.000 title abstract description 9
- -1 polypropylene Polymers 0.000 claims abstract description 67
- 239000003054 catalyst Substances 0.000 claims abstract description 65
- 125000003118 aryl group Chemical group 0.000 claims abstract description 13
- 125000000217 alkyl group Chemical group 0.000 claims description 66
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 64
- 239000011541 reaction mixture Substances 0.000 claims description 64
- 150000001875 compounds Chemical class 0.000 claims description 61
- 125000004432 carbon atom Chemical group C* 0.000 claims description 57
- 239000011777 magnesium Substances 0.000 claims description 55
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 40
- 229910052749 magnesium Inorganic materials 0.000 claims description 40
- 239000000203 mixture Substances 0.000 claims description 28
- 239000010936 titanium Substances 0.000 claims description 25
- 229910052719 titanium Inorganic materials 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 20
- 229910052723 transition metal Inorganic materials 0.000 claims description 17
- 150000003624 transition metals Chemical class 0.000 claims description 17
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 12
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 9
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 8
- 229920000098 polyolefin Polymers 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 abstract description 21
- 229920001155 polypropylene Polymers 0.000 abstract description 21
- 125000001072 heteroaryl group Chemical group 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 231100000252 nontoxic Toxicity 0.000 abstract description 5
- 230000003000 nontoxic effect Effects 0.000 abstract description 5
- 125000004209 (C1-C8) alkyl group Chemical group 0.000 abstract 1
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 42
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 36
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 36
- 229910010165 TiCu Inorganic materials 0.000 description 31
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 30
- 229960002479 isosorbide Drugs 0.000 description 25
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 24
- 239000002904 solvent Substances 0.000 description 22
- 239000007787 solid Substances 0.000 description 21
- DIOQZVSQGTUSAI-UHFFFAOYSA-N decane Chemical compound CCCCCCCCCC DIOQZVSQGTUSAI-UHFFFAOYSA-N 0.000 description 20
- 238000003786 synthesis reaction Methods 0.000 description 19
- 230000015572 biosynthetic process Effects 0.000 description 18
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 16
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- 229910052757 nitrogen Inorganic materials 0.000 description 15
- 238000001157 Fourier transform infrared spectrum Methods 0.000 description 12
- MGWAVDBGNNKXQV-UHFFFAOYSA-N diisobutyl phthalate Chemical compound CC(C)COC(=O)C1=CC=CC=C1C(=O)OCC(C)C MGWAVDBGNNKXQV-UHFFFAOYSA-N 0.000 description 12
- 235000019439 ethyl acetate Nutrition 0.000 description 12
- 239000011949 solid catalyst Substances 0.000 description 12
- 238000001914 filtration Methods 0.000 description 11
- KLDXJTOLSGUMSJ-BXKVDMCESA-N (3s,3as,6s,6as)-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]furan-3,6-diol Chemical compound O[C@H]1CO[C@H]2[C@@H](O)CO[C@H]21 KLDXJTOLSGUMSJ-BXKVDMCESA-N 0.000 description 10
- QOSSAOTZNIDXMA-UHFFFAOYSA-N Dicylcohexylcarbodiimide Chemical compound C1CCCCC1N=C=NC1CCCCC1 QOSSAOTZNIDXMA-UHFFFAOYSA-N 0.000 description 10
- KLDXJTOLSGUMSJ-JGWLITMVSA-N Isosorbide Chemical compound O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 KLDXJTOLSGUMSJ-JGWLITMVSA-N 0.000 description 10
- 238000004458 analytical method Methods 0.000 description 10
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 10
- 238000002844 melting Methods 0.000 description 10
- 230000008018 melting Effects 0.000 description 10
- 239000004698 Polyethylene Substances 0.000 description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 9
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- UAOMVDZJSHZZME-UHFFFAOYSA-N diisopropylamine Chemical compound CC(C)NC(C)C UAOMVDZJSHZZME-UHFFFAOYSA-N 0.000 description 8
- 229910001629 magnesium chloride Inorganic materials 0.000 description 8
- 238000001878 scanning electron micrograph Methods 0.000 description 8
- 229910003074 TiCl4 Inorganic materials 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- QQONPFPTGQHPMA-UHFFFAOYSA-N Propene Chemical compound CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 125000001424 substituent group Chemical group 0.000 description 6
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 description 6
- 101100494773 Caenorhabditis elegans ctl-2 gene Proteins 0.000 description 5
- 101100112369 Fasciola hepatica Cat-1 gene Proteins 0.000 description 5
- 101100005271 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) cat-1 gene Proteins 0.000 description 5
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- ADFXKUOMJKEIND-UHFFFAOYSA-N 1,3-dicyclohexylurea Chemical compound C1CCCCC1NC(=O)NC1CCCCC1 ADFXKUOMJKEIND-UHFFFAOYSA-N 0.000 description 4
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 4
- 238000005033 Fourier transform infrared spectroscopy Methods 0.000 description 4
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 4
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 4
- 238000001460 carbon-13 nuclear magnetic resonance spectrum Methods 0.000 description 4
- 238000000113 differential scanning calorimetry Methods 0.000 description 4
- 239000012044 organic layer Substances 0.000 description 4
- 238000001144 powder X-ray diffraction data Methods 0.000 description 4
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 4
- 229910052938 sodium sulfate Inorganic materials 0.000 description 4
- 235000011152 sodium sulphate Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005160 1H NMR spectroscopy Methods 0.000 description 3
- 101150116295 CAT2 gene Proteins 0.000 description 3
- 101100326920 Caenorhabditis elegans ctl-1 gene Proteins 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 101100126846 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) katG gene Proteins 0.000 description 3
- 239000003426 co-catalyst Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 239000005711 Benzoic acid Substances 0.000 description 2
- 235000010233 benzoic acid Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229910001507 metal halide Inorganic materials 0.000 description 2
- 125000002950 monocyclic group Chemical group 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 125000006413 ring segment Chemical group 0.000 description 2
- KZMAWJRXKGLWGS-UHFFFAOYSA-N 2-chloro-n-[4-(4-methoxyphenyl)-1,3-thiazol-2-yl]-n-(3-methoxypropyl)acetamide Chemical compound S1C(N(C(=O)CCl)CCCOC)=NC(C=2C=CC(OC)=CC=2)=C1 KZMAWJRXKGLWGS-UHFFFAOYSA-N 0.000 description 1
- RVDLHGSZWAELAU-UHFFFAOYSA-N 5-tert-butylthiophene-2-carbonyl chloride Chemical compound CC(C)(C)C1=CC=C(C(Cl)=O)S1 RVDLHGSZWAELAU-UHFFFAOYSA-N 0.000 description 1
- 101100392078 Caenorhabditis elegans cat-4 gene Proteins 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 101100005280 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) cat-3 gene Proteins 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 125000002619 bicyclic group Chemical group 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- SJJCABYOVIHNPZ-UHFFFAOYSA-N cyclohexyl-dimethoxy-methylsilane Chemical compound CO[Si](C)(OC)C1CCCCC1 SJJCABYOVIHNPZ-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N glutaric acid Chemical class OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 150000002688 maleic acid derivatives Chemical class 0.000 description 1
- 150000002690 malonic acid derivatives Chemical class 0.000 description 1
- 125000004184 methoxymethyl group Chemical group [H]C([H])([H])OC([H])([H])* 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 125000005498 phthalate group Chemical class 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000425 proton nuclear magnetic resonance spectrum Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003890 succinate salts Chemical class 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- VOITXYVAKOUIBA-UHFFFAOYSA-N triethylaluminium Chemical compound CC[Al](CC)CC VOITXYVAKOUIBA-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/04—Monomers containing three or four carbon atoms
- C08F110/06—Propene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F110/00—Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
- C08F110/02—Ethene
Definitions
- the present disclosure pertains to the technical field of Ziegler-Natta catalysts.
- the present disclosure provides a Ziegler-Natta catalyst comprising isohexide derivatives of formula I as internal electron donor and a method for preparation thereof, wherein Ri and R 2 , independent of each other, is selected from G, to C12 aryl group, and G, to C12 heteroaryl group.
- polypropylene is one of the largest in demand in the world market due to its high performance characteristics such as stiffness, impact resistance, transparency, low production cost and ability to be recycled. These properties make it an extremely versatile polymer, which can be applied in various market segments such as industrial packaging, automotive, adhesives and molded products.
- MgCl 2 supported Titanium catalysts are used as catalyst for the production of polypropylene and internal donors (ID) are used to get a significant increase in the isotacticity of the polypropylene.
- Modern MgCb-supported Ziegler-Natta catalyst usually consists of TiCU as an active species and an internal donor as an isotacticity improver, and MgCl 2 as a support.
- Internal donors play a prominent role in catalyst performance and affect the catalyst reactivity and the PP properties such as isotacticity, molecular weight, and its distribution. Commonly these electron donors are phthalates, 1,3-diethers, malonates, succinates, glutarates, maleates, and ketoesters.
- Phthalate based catalysts have been widely used for the commercial production of PP. Use of alkoxy-silane as an external donors led to further increase in performance of these catalyst systems.
- Phthalate based systems have caused regulatory and human health concern, therefore it is important to find suitable alternatives.
- the phthalate free catalyst system should be employed and because of these reasons, the research in the field of phthalate free catalyst system development has boosted in the last two decades.
- Non-phthalate systems have been evaluated in the literature and found that they generally do not match the performance of the phthalate systems. Hence, it is very important to improve the technology of non-phthalate systems to overcome the barriers.
- Phthalate-based systems can be considered as a very important catalyst system but due to human health concerns, several industries are working on the development of phthalate free catalyst systems for the production of PP. Few state of the art catalysts have been summarized herein below.
- US 9284392B2 discloses solid catalyst component for olefin polymerization.
- the solid catalyst component comprises titanium, magnesium, halogen and a combination of internal electron donor compounds containing at least one 1,8-naphthyl diester compound and at least one 3,3-bis(methoxymethyl) alkane compound.
- Another US20080214881A1 discloses solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins containing magnesium, titanium, and halogen, further containing an internal electron donor of specific general formula.
- US 4971937A discloses catalyst components for the polymerization of olefins and modified with electron-donor compounds, comprising a titanium halide supported on a magnesium dihalide in active form and containing as an electron- donor compound a di- or other polyether having specific reactivity characteristics towards MgCl 2 and TiC
- An object of the present disclosure is to provide internal electron donors that overcome the shortcomings of the conventional internal electron donors in Ziegler-Natta catalysts.
- Another object of the present disclosure is to provide a method for production of internal electron donors.
- Yet another object of the present disclosure is to provide Ziegler-Natta catalysts that overcome the shortcomings of the conventional Ziegler-Natta catalysts.
- Further object of the present disclosure is to provide Ziegler-Natta catalyst that is non-toxic, environment friendly and commercially viable.
- Still further object of the present disclosure is to provide a method of production of Ziegler-Natta catalysts.
- Still further object of the present disclosure is to provide a method for preparing polypropylene that is non-toxic, environment friendly and commercially viable.
- the present disclosure pertains to the technical field of Ziegler-Natta catalysts.
- the present disclosure provides a Ziegler-Natta catalyst comprising isohexide derivatives of formula I as internal electron donor and a method for preparation thereof.
- An aspect of the present disclosure relates to a method for preparing a Ziegler-Natta catalyst, said method comprising at least the step of mixing a magnesium support with a transition metal halide in presence of an internal donor compound of formula I or an isomer or mixtures thereof:
- Ri and R2 independent of each other, is selected from Ci to C « alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group.
- Ri and R2 in the internal donor compound of formula I are selected from methyl and phenyl.
- the magnesium support is selected from MgCU and an adduct MgCb.mRsOH, wherein R3 represents linear or branched alkyl group with 1 to 12 carbon atoms, and m ranges betweenl to 6.
- the magnesium support is also selected from Mg(0 i)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
- the step of mixing comprises: (a) mixing MgCl 2 with an alcohol of formula R3OH at a temperature ranging from 50°C to 150°C in presence of the internal donor compound of formula I or isomer or mixtures thereof to obtain an internal donor treated magnesium support, wherein R 3 represents linear or branched alkyl group with 1 to 12 carbon atoms; and (b) mixing the internal donor treated magnesium support from step (a) with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain the Ziegler- Natta catalyst.
- the substituent R3 in the alcohol of formula R3OH is ethyl group, and wherein the transition metal halide is titanium halide.
- the step of mixing comprises: (a) mixing the magnesium support with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain a reaction mixture; and (b) adding the internal donor compound of formula I or the isomer or mixtures thereof to the reaction mixture of step (a) at a temperature ranging from 50°C to 150°C to obtain the Ziegler-Natta catalyst.
- the internal donor compound of formula I is selected from a compound having formula la or formula lb:
- and R2 independent of each other, is selected from C
- the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
- the catalyst comprises: (a) an internal donor compound of formula I or an isomer or mixtures thereof wherein Ri and R2, independent of each other, is selected from Ci to C « alkyl group, C& to C12 aryl group, and Ce to C12 heteroaryl group; (b) a transition metal halide; and (c) a magnesium support.
- Ri and R2 in the internal donor compound of formula I are selected from methyl and phenyl.
- the magnesium support is selected from MgCU and an adduct MgC12.mR 3 OH, wherein R 3 represents linear or branched alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6.
- the substituent R in the alcohol of formula ROH is ethyl group.
- the magnesium support is also selected from Mg(0Ri)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
- the transition metal halide is titanium halide.
- the internal donor compound of formula I is selected from a compound having formula la or formula lb: wherein Ri and R2, independent of each other, is selected from C
- the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
- Further aspect of the present disclosure relates to a method for preparing polyolefin obtained from olefin polymerization in presence of the above Ziegler-Natta catalyst.
- Still further aspect of the present disclosure provides a polyolefin obtained from the above method.
- Still further aspect of the present disclosure provides a compound of formula I or an isomer or mixtures thereof: wherein R
- Still further aspect of the present disclosure is drawn towards use of a compound of formula I or an isomer or mixtures thereof as internal electron donor in Ziegler-Natta catalysts: wherein Ri and R2, independent of each other, is selected from G to alkyl group, C& to C12 aryl group, and Ce to C12 heteroaryl group.
- Ri and R2 independent of each other, is selected from G to alkyl group, C& to C12 aryl group, and Ce to C12 heteroaryl group.
- FIG. 1A-1C illustrate exemplary FTIR spectra, 1 H-NMR spectra and 13 C-NMR spectra of Isosorbide benzoate ester (ISBE), realized in accordance with an embodiment of the present disclosure.
- FIG. 2 illustrates an exemplary FTIR spectra of Isosorbide acetate ester (ISAE), realized in accordance with another embodiment of the present disclosure.
- FIG. 3A-3C illustrate exemplary FTIR spectra, 'H-NMR spectra and 13 C-NMR spectra of IMBE, realized in accordance with an embodiment of the present disclosure.
- FIG. 4 illustrates an exemplary FTIR spectra of catalyst 1 (Cat 1), prepared in accordance with an embodiment of the present disclosure.
- FIG. 5 illustrates an exemplary SEM image of catalyst 1 (Cat 1), prepared in accordance with an embodiment of the present disclosure.
- FIG. 6 illustrates an exemplary SEM image of catalyst 2 (Cat 2), prepared in accordance with an embodiment of the present disclosure.
- FIG. 7 illustrates an exemplary FTIR spectra of catalyst 6 (Cat 6), prepared in accordance with an embodiment of the present disclosure.
- FIG. 8 illustrates an exemplary FTIR spectra of catalyst 7 (Cat 7), prepared in accordance with an embodiment of the present disclosure.
- FIG. 9A-9C illustrate exemplary SEM images of polypropylene, prepared in accordance with embodiments of the present disclosure.
- FIG. 10A-10D illustrate exemplary Powder XRD data pertaining to the polypropylene, realized in accordance with embodiments of the present disclosure.
- FIG. 11A-11C illustrate exemplary SEM images of the resultant polyethylene, prepared in accordance with embodiments of the present disclosure.
- FIG. 12A-12C illustrate exemplary Powder XRD data pertaining to the resultant polyethylene, realized in accordance with embodiments of the present disclosure.
- the numbers expressing quantities of ingredients, properties such as concentration, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about”. Accordingly, in some embodiments, the numerical parameters set forth in the written description are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable.
- each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus, if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, then the inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed.
- inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed.
- Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
- the present disclosure pertains to the technical field of Ziegler-Natta catalysts.
- the present disclosure provides a Ziegler-Natta catalyst comprising isohexide derivatives of formula I as internal electron donor and a method for preparation thereof.
- An aspect of the present disclosure relates to a process for a Ziegler-Natta catalyst, said method comprising at least the step of mixing a magnesium support with a transition metal halide in presence of an internal donor compound of formula I or an isomer or mixtures thereof:
- R 2 wherein R
- alkyl refers to an alkane absent hydrogen.
- aryl refers to a monocyclic or fused bicyclic, aromatic ring assembly.
- aryl may be phenyl, benzyl or naphthyl.
- heteroaryl refers to a monocyclic or polycyclic ring assembly wherein at least one ring atom is a heteroatom and the remaining ring atoms are carbon, and at least one of the rings comprising the ring assembly is an aromatic ring.
- Ri and R2 independent of each other, is selected from linear or branched, substituted or unsubstituted Ci to C7 alkyl group, or Ci to Ce alkyl group, or Ci to C5 alkyl group, or Ci to C4 alkyl group, or Ci to C3 alkyl group.
- Ri and R2 independent of each other, is selected from branched or unbranched Ce to C12 aryl group, Ce to C10 aryl group, or Ce to C « aryl group.
- Ri and R2 independent of each other, is selected from branched or unbranched Ce to C12 heteroaryl group, or Ce to C10 heteroaryl group, or Ce to C « heteroaryl group.
- the magnesium support is selected from MgCl 2 and an adduct MgCb.mRsOH.
- the substituent R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, and m ranges betweenl to 6.
- R? represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms.
- R3 is ethyl group.
- the magnesium support is selected from Mg(OR4) 2 , where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
- R4 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms.
- R4 is ethyl group.
- the step of mixing comprises: (a) mixing MgCl 2 with an alcohol of formula R 3 0H at a temperature ranging from 50°C to 150°C in presence of the internal donor compound of formula I or isomer or mixtures thereof to obtain an internal donor treated magnesium support, wherein R 3 represents linear or branched alkyl group with 1 to 12 carbon atoms; and (b) mixing the internal donor treated magnesium support from step (a) with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain the Ziegler-Natta catalyst.
- R3 in the alcohol of formula R3OH is ethyl group, and wherein the transition metal halide is titanium halide.
- the step of mixing comprises: (a) contacting anhydrous MgCl 2 with a dry alcohol of formula R3OH in presence of a hydrocarbon solvent at a temperature ranging from 80°C to 120°C to produce an adduct MgCI 2 .mR 2 OH, wherein R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms; (b) contacting the adduct MgCh.mRsOH with the internal donor compound of formula I or the isomer or mixtures thereof at a temperature ranging from 60°C to 120°C to obtain the internal donor treated adduct; and (c) subjecting the internal donor treated adduct from step (b) to titanation one to three times by: contacting the internal donor treated adduct with a titanium halide at a temperature ranging from 90°C to 140°C followed by removal of the titanium halide to obtain the Ziegler-Natta catalyst.
- R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R3 is ethyl group.
- the step of mixing comprises: (a) mixing the magnesium support with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain a reaction mixture; and (b) adding the internal donor compound of formula I or the isomer or mixtures thereof to the reaction mixture of step (a) at a temperature ranging from 50°C to 150°C to obtain the Ziegler-Natta catalyst.
- the step of mixing comprises: (a) contacting anhydrous MgCb with a titanium metal halide in presence of a hydrocarbon solvent at a temperature ranging from 90°C to 150°C to obtain the reaction mixture; (b) adding the internal donor compound of formula I or the isomer or mixtures thereof to the reaction mixture of step (a) at a temperature ranging from 90°C to 150°C; and optionally, (c) subjecting the mixture from step (b) to titanation one to three times by contacting the mixture from step (b) with titanium metal halide in presence of a hydrocarbon solvent at a temperature ranging from 90°C to 150°C to obtain the Ziegler-Natta catalyst.
- the internal donor compound of formula I is selected from a compound having formula la or formula lb: wherein Ri and R2, independent of each other, is selected from Ci to C « alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group.
- the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
- the Ziegler-Natta catalyst comprises: (a) an internal donor compound of formula I or an isomer or mixtures thereof wherein Ri and R2, independent of each other, is selected from Ci to C « alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group;
- the Ziegler-Natta catalyst is obtained from the method described hereinabove. Accordingly, the embodiments pertaining to the method for preparing the Ziegler-Natta catalyst are applicable herein as well.
- Ri and R2 independent of each other, is selected from linear or branched, substituted or unsubstituted Ci to C7 alkyl group, or Ci to Ce alkyl group, or Ci to C5 alkyl group, or Ci to C4 alkyl group, or Ci to C3 alkyl group.
- Ri and R2 independent of each other, is selected from branched or unbranched Ce to C ⁇ aryl group, Ce to Cioaryl group, or Ce to C «aryl group.
- Ri and R2 independent of each other, is selected from branched or unbranched Ce to C12 heteroaryl group, or Ce to C10 heteroaryl group, or Ce to C « heteroaryl group.
- Ri and R2 in the internal donor compound of formula I is selected from methyl and phenyl.
- the magnesium support is selected from MgCU and an adduct MgCb.mFCOH.
- the substituent R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6.
- R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms.
- R3 is ethyl group.
- the magnesium support is selected from Mg(OR4)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
- R4 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms.
- R4 is ethyl group.
- the internal donor compound of formula I is selected from a compound having formula la or formula lb: wherein Ri and R2, independent of each other, is selected from C
- the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
- and R2 independent of each other, is selected from C
- Ri and R2 independent of each other, is selected from linear or branched, substituted or unsubstituted Ci to C7 alkyl group, or Ci to Ce alkyl group, or Ci to C5 alkyl group, or Ci to C4 alkyl group, or Ci to C3 alkyl group.
- Ri and R2 independent of each other, is selected from branched or unbranched Ce to C12 aryl group, Ce to C10 aryl group, or Ce to C « aryl group.
- Ri and R2, independent of each other is selected from branched or unbranched Ce to C12 heteroaryl group, or Ce to C10 heteroaryl group, or C& to C « heteroaryl group.
- Ri and R2 in the internal donor compound of formula I is selected from methyl and phenyl.
- the magnesium support is selected from MgCU and an adduct MgC12.mR 3 OH.
- the substituent R 3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6.
- R 3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms.
- R 3 is ethyl group.
- the magnesium support is selected from Mg(0Ri)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
- R4 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms.
- R4 is ethyl group.
- the internal donor compound of formula I is selected from a compound having formula la or formula lb: wherein Ri and R2, independent of each other, is selected from Ci to C « alkyl group, C& to C12 aryl group, and Ce to C12 heteroaryl group.
- the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
- Still further aspect of the present disclosure is drawn towards use of a compound of formula I as internal electron donor for preparation of a Ziegler-Natta catalyst, wherein R
- Ri and R2 independent of each other, is selected from linear or branched, substituted or unsubstituted Ci to Ci alkyl group, or Ci to Ce alkyl group, or Ci to C5 alkyl group, or Ci to C4 alkyl group, or Ci to C3 alkyl group.
- Ri and R2 independent of each other, is selected from branched or unbranched Ce to C12 aryl group, Ce to C10 aryl group, or Ce to C « aryl group.
- Ri and R2 independent of each other, is selected from branched or unbranched Ce to C12 heteroaryl group, or Ce to C10 heteroaryl group, or Ce to C « heteroaryl group.
- the magnesium support is selected from MgCl 2 and an adduct MgCb.mRsOH.
- the substituent R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6.
- R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms.
- R3 is ethyl group.
- the magnesium support is selected from Mg(OR4) 2 , where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
- the internal donor compound of formula I is selected from a compound having formula la or formula lb: wherein Ri and R 2 , independent of each other, is selected from Ci to C « alkyl group, G, to C12 aryl group, and Ce to Ci 2 heteroaryl group.
- the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
- Still further aspect of the present disclosure relates to a method for preparing polyolefin obtained from olefin polymerization in presence of the Ziegler-Natta described hereinabove.
- the Ziegler-Natta catalyst for olefin polymerization is obtained from the method described hereinabove. Accordingly, the embodiments pertaining to the Ziegler-Natta catalyst are applicable herein as well.
- Still further aspect of the present disclosure provides a polyolefin obtained from the method described hereinabove.
- the polyolefin is obtained from the method described hereinabove. Accordingly, the embodiments pertaining to the method are applicable herein as well.
- Yet another aspect of the present disclosure relates to a compound of formula I or an isomer or mixtures thereof: wherein Ri and R2, independent of each other, is selected from Ci to C « alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group.
- the compound of formula I or the isomer or mixtures thereof is same as the internal donor compound of formula I or the isomer or mixtures thereof as described hereinabove. Accordingly, the various embodiments pertaining to the internal donor compound of formula I or the isomer or mixtures thereof described hereinabove are applicable here as well. [00108] Still further aspect of the present disclosure is drawn towards use of a compound of formula I or an isomer or mixtures thereof as internal electron donor in Ziegler-Natta catalysts: wherein Ri and R2, independent of each other, is selected from Ci to C « alkyl group, Ce to C12 aryl group, and Ce to C 12 heteroaryl group.
- the compound of formula I or the isomer or mixtures thereof is same as the internal donor compound of formula I or the isomer or mixtures thereof as described hereinabove. Accordingly, the various embodiments pertaining to the internal donor compound of formula I or the isomer or mixtures thereof described hereinabove are applicable here as well.
- Isosorbide benzoate ester (donor molecule 1) obtained in about 30% yield. Structure of the resultant molecule was established using H, C-NMR and FTIR analysis. Melting point of isosorbide was found to be 60°C. Melting point of ISBE was found to be 165-168 °C. FTIR spectra, 'H-NMR spectra and 13 C-NMR spectra of Isosorbide benzoate ester (ISBE) are provided at FIGs. 1A-1C, respectively.
- Isosorbide acetate ester (donor molecule 2) obtained in ⁇ 94% yield. Structure of the resultant molecule was established using 1 H, 13 C-NMR and FTIR analysis. Melting point of isosorbide was found to be 60 °C. Melting point of ISAE was found to be 110-112 °C. FTIR spectra of Isosorbide acetate ester (ISAE) is provided at FIG. 2. [00115] Synthesis of Isomannide benzoate ester (IMBE): omann e
- Isomannide acetate ester (donor molecule 4) obtained in ⁇ 38% yield. Structure of the resultant molecule was established using 1 H, 13 C-NMR and FTIR analysis. Melting Point of isomannide was found to be 80-85 °C. Melting point of Isomannide acetate ester (IMAE) was found to be 121-125 °C.
- Step 2 - TiCL treatment to MgCL.EtOH adduct The above adduct from step 1 was taken in 3-neck RBF and TiCU (30 mL) was added and reaction mixture was heated to 120°C for 2 hours. The reaction mixture was cooled to 90°C and the TiCU was removed by cannula filtration at 90°C temperature. Again TiCU was added and the reaction mixture was heated at 120°C for 1 hour and TiCU was filtered off at 90°C. The addition and removal of TiCU was carried out one more time (total 3 times TiCU treatment). Finally, solid was washed with dry heptane (60 mL * 6) and final washing was given by dry hexane (60 mL * 1).
- Step 2 - TiCL treatment to MgCh.EtOH adduct The above adduct from step 1 was taken in a 3 -neck RBF and TiCU (30 mL) was added and reaction mixture was heated to 120°C for 2 hours. The reaction mixture was cooled to 90°C and the TiCU was removed by cannula filtration at 90°C temperature. Again TiCU was added and the reaction mixture was heated at 120°C for 1 hour and TiCU was filtered off at 90°C. The addition and removal of TiCU was carried out one more time (total 3 times TiCU treatment). Finally, solid was washed with dry heptane (60 mL * 6) and final washing was given by dry hexane (60 mL * 1).
- Step 1 - MgCU.EtOH adduct synthesis Anhydrous MgCE (4.76 g) was taken from glove box in a Schlenk RBF and dry ethanol (10ml) and 50 mL of dry heptane was syringed. The reaction mixture was heated at 100 °C for 1 hour and then cool down to 70 °C. ISAE internal donor (varying concentration) was added at 70°C temperature and again reaction temperature was increased to 100°C and heated for 2 hours. Reaction mixture was cool down to 70°C and 100 mL dry Decane was syringed and stirred vigorously.
- Step 2 - TiCU treatment to MgCU.EtOH adduct The above adduct from step 1 was taken in a 3 -neck RBF and T1CI4 (30ml) was added and reaction mixture was heated to 120 °C for 2 hours. The reaction mixture was cooled to 90 °C and the TiCU was removed by cannula filtration at 90 °C temperature.
- Step 1 - MgCU.EtOH adduct synthesis Anhydrous MgCU (4.76 g) was taken from glove box in a Schlenk RBF and dry ethanol (10ml) and 50 mL of dry heptane was syringed. The reaction mixture was heated at 100 °C for 1 hour and then cool down to 70 °C. IMBE internal donor (varying concentration) was added at 70 °C temperature and again reaction temperature was increased to 100 °C and heated for 2 hours. Reaction mixture was cool down to 70 °C and 100 mL dry Decane was syringed and stirred vigorously.
- Step 2 - TiCU treatment to MgCU.EtOH adduct The above adduct from step 1 was taken in a 3 -neck RBF and TiCU (30ml) was added and reaction mixture was heated to 120 °C for 2 hours. The reaction mixture was cooled to 90 °C and the TiCU was removed by cannula filtration at 90 °C temperature. Again TiCU was added and the reaction mixture was heated at 120 °C for 1 hour and TiCU was filtered off at 90 °C. The addition and removal of TiCU was carried out one more time (total 3 times TiCU treatment).
- Step 1 - MgC .EtOH adduct synthesis Anhydrous MgCF (4.76 g) was taken from glove box in a Schlenk RBF and dry ethanol (10ml) and 50 mL of dry heptane was syringed. The reaction mixture was heated at 100 °C for 1 hour and then cool down to 70 °C. IMBE internal donor (varying concentration) was added at 70 °C temperature and again reaction temperature was increased to 100 °C and heated for 2 hours. Reaction mixture was cool down to 70 °C and 100 mL dry Decane was syringed and stirred vigorously.
- Step 2 - TiCl 4 treatment to MgCh.EtOH adduct The above adduct from step 1 was taken in a 3 -neck RBF and TiCI 4 (30ml) was added and reaction mixture was heated to 120 °C for 2 hours. The reaction mixture was cooled to 90 °C and the TiCl 4 was removed by cannula filtration at 90 °C temperature. Again TiCl 4 was added and the reaction mixture was heated at 120 °C for 1 hour and TiCl 4 was filtered off at 90 °C. The addition and removal of TiCl 4 was carried out one more time (total 3 times TiCl 4 treatment).
- Stepl Anhydrous MgCF (2.5 g) was taken from glove box in a Schlenk RBF and dry chlorobenzene ( ⁇ 58 mL) was syringed under nitrogen atmosphere. TiCl 4 (57.59 mL) was added dropwise using pressure equalizing dropping funnel under nitrogen. Reaction mixture was heated to 130°C for 60 minutes and cool down to the 60-70°C. At this temperature, DIBP (1.40 mL) was added and reaction mixture was heated at 130°C for 60 minutes. Reaction mixture was cool down to 60°C and the solvent was removed using cannula under nitrogen. [00136] Step 2: Addition of chlorobenzene and TiCU was carried out followed by the heating of the reaction mixture at 130°C for 60 minutes. Again reaction mixture was cool down to 60°C and solvent was removed by cannula under nitrogen atmosphere.
- Step 3 Step 2 was repeated again to obtain the solid catalyst.
- Step4 Solid catalyst obtained was washed using dry hexane (100 ml * 3) and dried under vacuum. Catalyst was stored inside the glove box for further use. Yield of the catalyst was 1.8 g (72 %).
- FTIR spectra of catalyst 6 (Cat 6) is provided at FIG. 7. Upon ICP-OES analysis of catalyst 1 , Mg content was found to be 23% and Ti content was found to be 2.1%.
- Step 1 Anhydrous MgCF (2.5 g) was taken from glove box in a Schlenk RBF and dry chlorobenzene ( ⁇ 58 mL) was syringed under nitrogen atmosphere. TiCU (57.59 mL) was added dropwise using pressure equalizing dropping funnel under nitrogen. Reaction mixture was heated to 130°C for 60 minutes and cool down to the 60-70°C. At this temperature, Isosorbide Benzoate Ester (ISBE) (1.8 g) was added and reaction mixture was heated at 130°C for 60 minutes. Reaction mixture was cool down to 60°C and the solvent was removed using cannula under nitrogen.
- ISBE Isosorbide Benzoate Ester
- Step 2 Further, addition of chlorobenzene and TiCU was carried out followed by the heating of reaction mixture at 130°C for 60 minutes. Again reaction mixture was cool down to
- Step 3 Step 2 was repeated again to obtain the solid catalyst.
- Step 4 Solid catalyst obtained from step 3 was washed using dry hexane (100 mL *
- Step 1 Magnesium ethoxide (2.5 gm) was taken in 3-neck RBF and toluene (25 mL) was syringed under nitrogen atmosphere. The reaction mixture was heated to 90 °C for 10 minutes. Isosorbide Benzoate Ester based donor (ISBE) (1.54 gm) was added. TiCU (5 mL) was added at 0 °C dropwise using pressure equalizing dropping funnel under nitrogen. The reaction mixture was heated at 110 °C for 2 hours. The temperature of the reaction mixture was then maintained to 90° C and the toluene was filtered out at 90°C. Solid was washed with toluene twice.
- Step 2 Again, toluene (25 mL) and TiCU (5 mL) was added and reaction mixture was heated to 110°C for 2 hours. Reaction mixture is then maintained to 90 °C and filtration was carried out.
- Step 3 Solid catalyst obtained was washed twice with toluene (25 mL) and 5 times with heptane (25 mL) at 90 °C. The catalyst was dried under vacuum for few hours and then magnesium and titanium contents were determined. From UV analysis Ti content was found to be 9.8% and from EDTA titration, Mg content was found to be 12 %.
- Cat 9-11 were synthesized using different electron donors such as ISAE, IMBE, and IMAE.
- TEAL triethylaluminum
- CHMDMS cyclohexyl methyl dimethoxysilane
- Table 4 Characteristics of the resultant polyethylene polymer - DSC analysis
- FIGS. 11A-C SEM images of the resultant polyethylene (corresponding to Exp. nos. 2a, 4a and 8a) are provided at FIGS. 11A-C.
- the synthesized catalyst using biobased internal electron donors are able to produce polyolefin such as polypropylene and polyethylene.
- the polypropylene obtained herein showed melting temperature in the range of 154°C to 162 °C, which is in good match with the polypropylene produced by phthalate based catalyst.
- the melting temperature was in the range of 134°C to 136 °C which is well comparable with the polyethylene produced by conventional Ziegler-Natta catalysts.
- the present disclosure provides internal electron donors that overcome one or more shortcomings of the conventional internal electron donors in Ziegler-Natta catalysts.
- the present disclosure provides a method for production of internal electron donors.
- the present disclosure provides Ziegler-Natta catalysts that overcome one or more shortcomings of the conventional Ziegler-Natta catalysts. [00159] The present disclosure provides Ziegler-Natta catalyst that is non-toxic, environment friendly and commercially viable.
- the present disclosure provides a method of production of polypropylene that is nontoxic, environment friendly and commercially viable.
Abstract
The present disclosure provides a Ziegler-Natta catalyst comprising isohexide derivative of formula (I) as internal electron donor and a method for preparation thereof, wherein R1 and R2 independently represents an C1 to C8 alkyl group, an aryl group or a heteroaryl group. The Ziegler-Natta catalysts of the present disclosure are non-toxic, environment friendly and commercially viable and afford production of polypropylene with excellent properties.
Description
METHOD FOR PREPARATION OF NOVEL ZIEGLER-NATTA CATALYST FOR OLEFIN POLYMERIZATION
TECHNICAL FIELD
[0001] The present disclosure pertains to the technical field of Ziegler-Natta catalysts. In particular, the present disclosure provides a Ziegler-Natta catalyst comprising isohexide derivatives of formula I as internal electron donor and a method for preparation thereof,
wherein Ri and R2, independent of each other, is selected from G, to C12 aryl group, and G, to C12 heteroaryl group.
BACKGROUND
[0002] Background description includes information that may be useful in understanding the present invention. It is not an admission that any of the information provided herein is prior art or relevant to the presently claimed invention, or that any publication specifically or implicitly referenced is prior art.
[0003] Among polyolefin resins, polypropylene (PP) is one of the largest in demand in the world market due to its high performance characteristics such as stiffness, impact resistance, transparency, low production cost and ability to be recycled. These properties make it an extremely versatile polymer, which can be applied in various market segments such as industrial packaging, automotive, adhesives and molded products.
[0004] Usually MgCl2 supported Titanium catalysts are used as catalyst for the production of polypropylene and internal donors (ID) are used to get a significant increase in the isotacticity of the polypropylene. Modern MgCb-supported Ziegler-Natta catalyst usually consists of TiCU as an active species and an internal donor as an isotacticity improver, and MgCl2 as a support. Internal donors play a prominent role in catalyst performance and affect the catalyst reactivity
and the PP properties such as isotacticity, molecular weight, and its distribution. Commonly these electron donors are phthalates, 1,3-diethers, malonates, succinates, glutarates, maleates, and ketoesters. Industrially, most of the time Phthalate based catalysts have been widely used for the commercial production of PP. Use of alkoxy-silane as an external donors led to further increase in performance of these catalyst systems.
[0005] Phthalate based systems have caused regulatory and human health concern, therefore it is important to find suitable alternatives. For the production of medical grade PP, food grade PP, the phthalate free catalyst system should be employed and because of these reasons, the research in the field of phthalate free catalyst system development has boosted in the last two decades. Non-phthalate systems have been evaluated in the literature and found that they generally do not match the performance of the phthalate systems. Hence, it is very important to improve the technology of non-phthalate systems to overcome the barriers. Phthalate-based systems can be considered as a very important catalyst system but due to human health concerns, several industries are working on the development of phthalate free catalyst systems for the production of PP. Few state of the art catalysts have been summarized herein below.
[0006] US 9284392B2 discloses solid catalyst component for olefin polymerization. The solid catalyst component comprises titanium, magnesium, halogen and a combination of internal electron donor compounds containing at least one 1,8-naphthyl diester compound and at least one 3,3-bis(methoxymethyl) alkane compound. Another US20080214881A1 discloses solid, hydrocarbon-insoluble, catalyst component useful in polymerizing olefins containing magnesium, titanium, and halogen, further containing an internal electron donor of specific general formula. US 4971937A discloses catalyst components for the polymerization of olefins and modified with electron-donor compounds, comprising a titanium halide supported on a magnesium dihalide in active form and containing as an electron- donor compound a di- or other polyether having specific reactivity characteristics towards MgCl2 and TiC
[0007] It is, therefore, a long standing need in the art to provide improved internal electron donors that overcome the shortcomings of the conventional catalyst systems. Need is also felt for improved Ziegler-Natta catalysts and method for preparation thereof. The present disclosure fulfils the existing need, at least in part, and provides new internal electron donors, method of production thereof, improved Ziegler-Natta catalysts as well as method for preparation thereof.
[0008] All publications herein are incorporated by reference to the same extent as if each individual publication or patent application were specifically and individually indicated to be incorporated by reference. Where a definition or use of a term in an incorporated reference is inconsistent or contrary to the definition of that term provided herein, the definition of that term provided herein applies and the definition of that term in the reference does not apply.
OBJECTS
[0009] An object of the present disclosure is to provide internal electron donors that overcome the shortcomings of the conventional internal electron donors in Ziegler-Natta catalysts.
[0010] Another object of the present disclosure is to provide a method for production of internal electron donors.
[0011] Yet another object of the present disclosure is to provide Ziegler-Natta catalysts that overcome the shortcomings of the conventional Ziegler-Natta catalysts.
[0012] Further object of the present disclosure is to provide Ziegler-Natta catalyst that is non-toxic, environment friendly and commercially viable.
[0013] Still further object of the present disclosure is to provide a method of production of Ziegler-Natta catalysts.
[0014] Still further object of the present disclosure is to provide a method for preparing polypropylene that is non-toxic, environment friendly and commercially viable.
SUMMARY
[0015] The present disclosure pertains to the technical field of Ziegler-Natta catalysts. In particular, the present disclosure provides a Ziegler-Natta catalyst comprising isohexide derivatives of formula I as internal electron donor and a method for preparation thereof.
[0016] An aspect of the present disclosure relates to a method for preparing a Ziegler-Natta catalyst, said method comprising at least the step of mixing a magnesium support with a transition metal halide in presence of an internal donor compound of formula I or an isomer or mixtures thereof:
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group.
[0017] In an embodiment, Ri and R2 in the internal donor compound of formula I, independent of each other, are selected from methyl and phenyl.
[0018] In another embodiment, the magnesium support is selected from MgCU and an adduct MgCb.mRsOH, wherein R3 represents linear or branched alkyl group with 1 to 12 carbon atoms, and m ranges betweenl to 6. The magnesium support is also selected from Mg(0 i)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
[0019] In still another embodiment, the step of mixing comprises: (a) mixing MgCl2 with an alcohol of formula R3OH at a temperature ranging from 50°C to 150°C in presence of the internal donor compound of formula I or isomer or mixtures thereof to obtain an internal donor treated magnesium support, wherein R3 represents linear or branched alkyl group with 1 to 12 carbon atoms; and (b) mixing the internal donor treated magnesium support from step (a) with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain the Ziegler- Natta catalyst. The substituent R3 in the alcohol of formula R3OH is ethyl group, and wherein the transition metal halide is titanium halide.
[0020] In yet another embodiment, the step of mixing comprises: (a) mixing the magnesium support with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain a reaction mixture; and (b) adding the internal donor compound of formula I or the isomer or mixtures thereof to the reaction mixture of step (a) at a temperature ranging from 50°C to 150°C to obtain the Ziegler-Natta catalyst.
[0021] In another embodiment, the internal donor compound of formula I is selected from a compound having formula la or formula lb:
wherein R| and R2, independent of each other, is selected from C| to C« alkyl group, C to C12 aryl group, and Ce to C12 heteroaryl group.
[0022] In a further embodiment, the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
[0023] Another aspect of the present disclosure provides a Ziegler-Natta catalyst. The catalyst comprises: (a) an internal donor compound of formula I or an isomer or mixtures thereof
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, C& to C12 aryl group, and Ce to C12 heteroaryl group; (b) a transition metal halide; and (c) a magnesium support.
[0024] In an embodiment, Ri and R2 in the internal donor compound of formula I, independent of each other, are selected from methyl and phenyl.
[0025] In another embodiment, the magnesium support is selected from MgCU and an adduct MgC12.mR3OH, wherein R3 represents linear or branched alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6. The substituent R in the alcohol of formula ROH is ethyl group. The magnesium support is also selected from Mg(0Ri)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
[0026] In another embodiment, the transition metal halide is titanium halide.
[0027] In yet another embodiment, the internal donor compound of formula I is selected from a compound having formula la or formula lb:
wherein Ri and R2, independent of each other, is selected from C| to C« alkyl group, C to C12 aryl group, and Ce to C12 heteroaryl group.
[0028] In still another embodiment, the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
[0029] Further aspect of the present disclosure relates to a method for preparing polyolefin obtained from olefin polymerization in presence of the above Ziegler-Natta catalyst.
[0030] Still further aspect of the present disclosure provides a polyolefin obtained from the above method.
[0031] Still further aspect of the present disclosure provides a compound of formula I or an isomer or mixtures thereof:
wherein R| and R2, independent of each other, is selected from to alkyl group, G> to C12 aryl group, and G, to C12 heteroaryl group.
[0032] Still further aspect of the present disclosure is drawn towards use of a compound of formula I or an isomer or mixtures thereof as internal electron donor in Ziegler-Natta catalysts:
wherein Ri and R2, independent of each other, is selected from G to alkyl group, C& to C12 aryl group, and Ce to C12 heteroaryl group.
[0033] Various objects, features, aspects and advantages of the inventive subject matter will become more apparent from the following detailed description of preferred embodiments.
BRIEF DESCRIPTION OF THE DRAWINGS
[0034] The accompanying drawings are included to provide a further understanding of the present disclosure, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.
[0035] FIG. 1A-1C illustrate exemplary FTIR spectra, 1 H-NMR spectra and 13C-NMR spectra of Isosorbide benzoate ester (ISBE), realized in accordance with an embodiment of the present disclosure.
[0036] FIG. 2 illustrates an exemplary FTIR spectra of Isosorbide acetate ester (ISAE), realized in accordance with another embodiment of the present disclosure.
[0037] FIG. 3A-3C illustrate exemplary FTIR spectra, 'H-NMR spectra and 13C-NMR spectra of IMBE, realized in accordance with an embodiment of the present disclosure.
[0038] FIG. 4 illustrates an exemplary FTIR spectra of catalyst 1 (Cat 1), prepared in accordance with an embodiment of the present disclosure.
[0039] FIG. 5 illustrates an exemplary SEM image of catalyst 1 (Cat 1), prepared in accordance with an embodiment of the present disclosure.
[0040] FIG. 6 illustrates an exemplary SEM image of catalyst 2 (Cat 2), prepared in accordance with an embodiment of the present disclosure.
[0041] FIG. 7 illustrates an exemplary FTIR spectra of catalyst 6 (Cat 6), prepared in accordance with an embodiment of the present disclosure.
[0042] FIG. 8 illustrates an exemplary FTIR spectra of catalyst 7 (Cat 7), prepared in accordance with an embodiment of the present disclosure.
[0043] FIG. 9A-9C illustrate exemplary SEM images of polypropylene, prepared in accordance with embodiments of the present disclosure.
[0044] FIG. 10A-10D illustrate exemplary Powder XRD data pertaining to the polypropylene, realized in accordance with embodiments of the present disclosure.
[0045] FIG. 11A-11C illustrate exemplary SEM images of the resultant polyethylene, prepared in accordance with embodiments of the present disclosure.
[0046] FIG. 12A-12C illustrate exemplary Powder XRD data pertaining to the resultant polyethylene, realized in accordance with embodiments of the present disclosure.
DETAILED DESCRIPTION
[0047] The following is a detailed description of various aspects and embodiments of the present invention. The aspects and embodiments are in such detail as to clearly communicate the invention. However, the amount of detail offered is not intended to limit the anticipated variations of these aspects and embodiments; on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the present invention as defined by the appended claims.
[0048] Each of the appended claims defines a separate invention, which for infringement purposes is recognized as including equivalents to the various elements or limitations specified in the claims. Depending on the context, all references below to the “invention” may in some cases refer to certain specific embodiments only. In other cases it will be recognized that references to the “invention” will refer to subject matter recited in one or more, but not necessarily all, of the claims.
[0049] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability.
[0050] Unless the context requires otherwise, throughout the specification which follow, the word “comprise” and variations thereof, such as, “comprises” and “comprising” are to be construed in an open, inclusive sense that is as “including, but not limited to.”
[0051] Reference throughout this specification to “one embodiment” or “an embodiment” means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
[0052] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise.
Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.
[0053] In some embodiments, the numbers expressing quantities of ingredients, properties such as concentration, and so forth, used to describe and claim certain embodiments of the invention are to be understood as being modified in some instances by the term “about”. Accordingly, in some embodiments, the numerical parameters set forth in the written description are approximations that can vary depending upon the desired properties sought to be obtained by a particular embodiment. In some embodiments, the numerical parameters should be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of some embodiments of the invention are approximations, the numerical values set forth in the specific examples are reported as precisely as practicable.
[0054] The recitation of ranges of values herein is merely intended to serve as a shorthand method of referring individually to each separate value falling within the range. Unless otherwise indicated herein, each individual value is incorporated into the specification as if it were individually recited herein.
[0055] The headings and abstract of the invention provided herein are for convenience only and do not interpret the scope or meaning of the embodiments.
[0056] All methods described herein can be performed in any suitable order unless otherwise indicated herein or otherwise clearly contradicted by context. The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element essential to the practice of the invention.
[0057] The following description provides many exemplary embodiments of the inventive subject matter. Although, each embodiment represents a single combination of inventive elements, the inventive subject matter is considered to include all possible combinations of the disclosed elements. Thus, if one embodiment comprises elements A, B, and C, and a second embodiment comprises elements B and D, then the inventive subject matter is also considered to include other remaining combinations of A, B, C, or D, even if not explicitly disclosed.
[0058] Various terms as used herein are shown below. To the extent a term used in a claim is not defined below, it should be given the broadest definition persons in the pertinent art have given that term as reflected in printed publications and issued patents at the time of filing.
[0059] The present disclosure pertains to the technical field of Ziegler-Natta catalysts. In particular, the present disclosure provides a Ziegler-Natta catalyst comprising isohexide derivatives of formula I as internal electron donor and a method for preparation thereof.
[0060] An aspect of the present disclosure relates to a process for a Ziegler-Natta catalyst, said method comprising at least the step of mixing a magnesium support with a transition metal halide in presence of an internal donor compound of formula I or an isomer or mixtures thereof:
R2
wherein R| and R2, independent of each other, is selected from C| to C« alkyl group, C to C12 aryl group, and Ce to C12 heteroaryl group.
[0061] In the present context, the term "alkyl" refers to an alkane absent hydrogen. Further, the term "aryl" refers to a monocyclic or fused bicyclic, aromatic ring assembly. For example, aryl may be phenyl, benzyl or naphthyl. Furthermore, the term "heteroaryl" refers to a monocyclic or polycyclic ring assembly wherein at least one ring atom is a heteroatom and the remaining ring atoms are carbon, and at least one of the rings comprising the ring assembly is an aromatic ring.
[0062] In an embodiment, Ri and R2, independent of each other, is selected from linear or branched, substituted or unsubstituted Ci to C7 alkyl group, or Ci to Ce alkyl group, or Ci to C5 alkyl group, or Ci to C4 alkyl group, or Ci to C3 alkyl group.
[0063] In another embodiment, Ri and R2, independent of each other, is selected from branched or unbranched Ce to C12 aryl group, Ce to C10 aryl group, or Ce to C« aryl group.
[0064] In yet another embodiment, Ri and R2, independent of each other, is selected from branched or unbranched Ce to C12 heteroaryl group, or Ce to C10 heteroaryl group, or Ce to C« heteroaryl group.
[0065] In still another embodiment, Ri and R2 in the internal donor compound of formula I, independent of each other, is selected from methyl and phenyl.
[0066] In an embodiment, the magnesium support is selected from MgCl2 and an adduct MgCb.mRsOH. The substituent R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, and m ranges betweenl to 6. In an embodiment, R? represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R3 is ethyl group.
[0067] In another embodiment, the magnesium support is selected from Mg(OR4)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms. In an embodiment, R4 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R4 is ethyl group.
[0068] In an embodiment, the step of mixing comprises: (a) mixing MgCl2 with an alcohol of formula R30H at a temperature ranging from 50°C to 150°C in presence of the internal donor compound of formula I or isomer or mixtures thereof to obtain an internal donor treated magnesium support, wherein R3 represents linear or branched alkyl group with 1 to 12 carbon atoms; and (b) mixing the internal donor treated magnesium support from step (a) with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain the Ziegler-Natta catalyst. In an embodiment, R3 in the alcohol of formula R3OH is ethyl group, and wherein the transition metal halide is titanium halide.
[0069] In another embodiment, the step of mixing comprises: (a) contacting anhydrous MgCl2 with a dry alcohol of formula R3OH in presence of a hydrocarbon solvent at a temperature ranging from 80°C to 120°C to produce an adduct MgCI2.mR2OH, wherein R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms; (b) contacting the adduct MgCh.mRsOH with the internal donor compound of formula I or the isomer or mixtures thereof at a temperature ranging from 60°C to 120°C to obtain the internal donor treated adduct; and (c) subjecting the internal donor treated adduct from step (b) to titanation one to three times by: contacting the internal donor treated adduct with a titanium halide at a temperature ranging from 90°C to 140°C followed by removal of the titanium halide to obtain the Ziegler-Natta catalyst.
[0070] In an embodiment, R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R3 is ethyl group.
[0071] In another embodiment, the step of mixing comprises: (a) mixing the magnesium support with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain a reaction mixture; and (b) adding the internal donor compound of formula I or the isomer or mixtures thereof to the reaction mixture of step (a) at a temperature ranging from 50°C to 150°C to obtain the Ziegler-Natta catalyst.
[0072] In one particular embodiment, the step of mixing comprises: (a) contacting anhydrous MgCb with a titanium metal halide in presence of a hydrocarbon solvent at a temperature ranging from 90°C to 150°C to obtain the reaction mixture; (b) adding the internal donor compound of formula I or the isomer or mixtures thereof to the reaction mixture of step (a) at a temperature ranging from 90°C to 150°C; and optionally, (c) subjecting the mixture from step (b) to titanation one to three times by contacting the mixture from step (b) with titanium metal halide in presence of a hydrocarbon solvent at a temperature ranging from 90°C to 150°C to obtain the Ziegler-Natta catalyst.
[0073] In yet another embodiment, the internal donor compound of formula I is selected from a compound having formula la or formula lb:
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group.
[0074] In still another embodiment, the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
[0075] Another aspect of the present disclosure provides a Ziegler-Natta catalyst. In an embodiment, the Ziegler-Natta catalyst comprises: (a) an internal donor compound of formula I or an isomer or mixtures thereof
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group;
(b) a transition metal halide; and
(c) a magnesium support.
[0076] In another embodiment, the Ziegler-Natta catalyst is obtained from the method described hereinabove. Accordingly, the embodiments pertaining to the method for preparing the Ziegler-Natta catalyst are applicable herein as well.
[0077] In an embodiment, Ri and R2, independent of each other, is selected from linear or branched, substituted or unsubstituted Ci to C7 alkyl group, or Ci to Ce alkyl group, or Ci to C5 alkyl group, or Ci to C4 alkyl group, or Ci to C3 alkyl group.
[0078] In another embodiment, Ri and R2, independent of each other, is selected from branched or unbranched Ce to C^aryl group, Ce to Cioaryl group, or Ce to C«aryl group.
[0079] In yet another embodiment, Ri and R2, independent of each other, is selected from branched or unbranched Ce to C12 heteroaryl group, or Ce to C10 heteroaryl group, or Ce to C« heteroaryl group.
[0080] In still another embodiment, Ri and R2 in the internal donor compound of formula I, independent of each other, is selected from methyl and phenyl.
[0081] In an embodiment, the magnesium support is selected from MgCU and an adduct MgCb.mFCOH. The substituent R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6. In an embodiment, R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R3 is ethyl group.
[0082] In another embodiment, the magnesium support is selected from Mg(OR4)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms. In an embodiment, R4 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R4 is ethyl group.
[0083] In yet another embodiment, the internal donor compound of formula I is selected from a compound having formula la or formula lb:
wherein Ri and R2, independent of each other, is selected from C| to C« alkyl group, t, to C12 aryl group, and Ce to C12 heteroaryl group.
[0084] In still another embodiment, the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
[0085] Further aspect of the present disclosure provides an internal donor compound of formula I or an isomer or mixtures thereof for Ziegler-Natta catalysts,
wherein R| and R2, independent of each other, is selected from C| to C« alkyl group, C to C12 aryl group, and Ce to C12 heteroaryl group.
[0086] In an embodiment, Ri and R2, independent of each other, is selected from linear or branched, substituted or unsubstituted Ci to C7 alkyl group, or Ci to Ce alkyl group, or Ci to C5 alkyl group, or Ci to C4 alkyl group, or Ci to C3 alkyl group.
[0087] In another embodiment, Ri and R2, independent of each other, is selected from branched or unbranched Ce to C12 aryl group, Ce to C10 aryl group, or Ce to C« aryl group.
[0088] In yet another embodiment, Ri and R2, independent of each other, is selected from branched or unbranched Ce to C12 heteroaryl group, or Ce to C10 heteroaryl group, or C& to C« heteroaryl group.
[0089] In still another embodiment, Ri and R2 in the internal donor compound of formula I, independent of each other, is selected from methyl and phenyl.
[0090] In an embodiment, the magnesium support is selected from MgCU and an adduct MgC12.mR3OH. The substituent R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6. In an embodiment, R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R3 is ethyl group.
[0091] In another embodiment, the magnesium support is selected from Mg(0Ri)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms. In an embodiment, R4 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R4 is ethyl group.
[0092] In yet another embodiment, the internal donor compound of formula I is selected from a compound having formula la or formula lb:
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, C& to C12 aryl group, and Ce to C12 heteroaryl group.
[0093] In still another embodiment, the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
[0094] Still further aspect of the present disclosure is drawn towards use of a compound of formula I as internal electron donor for preparation of a Ziegler-Natta catalyst,
wherein R| and R2, independent of each other, is selected from C| to C« alkyl group, C to C12 aryl group, and Ce to C12 heteroaryl group.
[0095] In an embodiment, Ri and R2, independent of each other, is selected from linear or branched, substituted or unsubstituted Ci to Ci alkyl group, or Ci to Ce alkyl group, or Ci to C5 alkyl group, or Ci to C4 alkyl group, or Ci to C3 alkyl group.
[0096] In another embodiment, Ri and R2, independent of each other, is selected from branched or unbranched Ce to C12 aryl group, Ce to C10 aryl group, or Ce to C« aryl group.
[0097] In yet another embodiment, Ri and R2, independent of each other, is selected from branched or unbranched Ce to C12 heteroaryl group, or Ce to C10 heteroaryl group, or Ce to C« heteroaryl group.
[0098] In still another embodiment, Ri and R2 in the internal donor compound of formula I, independent of each other, is selected from methyl and phenyl.
[0099] In an embodiment, the magnesium support is selected from MgCl2 and an adduct MgCb.mRsOH. The substituent R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6. In an embodiment, R3 represents linear or branched, substituted or unsubstituted alkyl group with 1 to 12 carbon atoms, or 1 to 10 carbon atoms, or 1 to 8 carbon atoms, or 1 to 6 carbon atoms, or 1 to 4 carbon atoms. In another embodiment, R3 is ethyl group. In yet another embodiment, the magnesium support is selected from Mg(OR4)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
[00100] In yet another embodiment, the internal donor compound of formula I is selected from a compound having formula la or formula lb:
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, G, to C12 aryl group, and Ce to Ci2 heteroaryl group.
[00101] In still another embodiment, the internal donor compound is selected from: Isosorbide benzoic ester (ISBE), Isosorbide acetic ester (ISAE), Isomannide benzoic ester (IMBE) and Isomannide acetic ester (ISAE) having the following structures:
[00102] Still further aspect of the present disclosure relates to a method for preparing polyolefin obtained from olefin polymerization in presence of the Ziegler-Natta described hereinabove.
[00103] In an embodiment, the Ziegler-Natta catalyst for olefin polymerization is obtained from the method described hereinabove. Accordingly, the embodiments pertaining to the Ziegler-Natta catalyst are applicable herein as well.
[00104] Still further aspect of the present disclosure provides a polyolefin obtained from the method described hereinabove.
[00105] In an embodiment, the polyolefin is obtained from the method described hereinabove. Accordingly, the embodiments pertaining to the method are applicable herein as well.
[00106] Yet another aspect of the present disclosure relates to a compound of formula I or an isomer or mixtures thereof:
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group.
[00107] In an embodiment, the compound of formula I or the isomer or mixtures thereof is same as the internal donor compound of formula I or the isomer or mixtures thereof as described hereinabove. Accordingly, the various embodiments pertaining to the internal donor compound of formula I or the isomer or mixtures thereof described hereinabove are applicable here as well.
[00108] Still further aspect of the present disclosure is drawn towards use of a compound of formula I or an isomer or mixtures thereof as internal electron donor in Ziegler-Natta catalysts:
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, Ce to C12 aryl group, and Ce to C 12 heteroaryl group.
[00109] In an embodiment, the compound of formula I or the isomer or mixtures thereof is same as the internal donor compound of formula I or the isomer or mixtures thereof as described hereinabove. Accordingly, the various embodiments pertaining to the internal donor compound of formula I or the isomer or mixtures thereof described hereinabove are applicable here as well.
[00110] While the foregoing description discloses various embodiments of the disclosure, other and further embodiments of the invention may be devised without departing from the basic scope of the disclosure. The invention is not limited to the described embodiments, versions or examples, which are included to enable a person having ordinary skill in the art to make and use the invention when combined with information and knowledge available to the person having ordinary skill in the art.
EXAMPLES
SYNTHESIS OF INTERNAL ELECTRON DONORS
[00112] In a clean 250 ml round bottom flask (RBF), benzoic acid (8.35 g, 0.0684 mol) and N,N'-Dicyclohexylcarbodiimide (DCC) (15.51 g, 0.0752 mol) was mixed under nitrogen. Then
ml of DCM (dichloromethane) was added followed by DIPA (Di-isopropylamine) (11.77 mL, 0.1163 mol). Reaction mixture was stirred at RT (23 °C) for 30 minutes. Isosorbide (5 g, 0.0341 mol) was added under nitrogen to the above reaction mixture. Immediately the reaction mixture color changed to pale yellow. The above reaction mixture was stirred at room temperature (RT) (about 23°C) for 48 hours. Reaction was quenched with water 950 mL. Organic layer was extracted and dried on sodium sulfate. Solvent was evaporated and solid was diluted again with DCM. Insoluble solid was found to be dicyclohexylurea which was filtered. Soluble fraction was evaporated, dried and characterized. Isosorbide benzoate ester (donor molecule 1) obtained in about 30% yield. Structure of the resultant molecule was established using H, C-NMR and FTIR analysis. Melting point of isosorbide was found to be 60°C. Melting point of ISBE was found to be 165-168 °C. FTIR spectra, 'H-NMR spectra and 13C-NMR spectra of Isosorbide benzoate ester (ISBE) are provided at FIGs. 1A-1C, respectively.
[00114] In a clean 250 ml round bottom flask (RBF), acetic acid (3.91 mL, 0.0684 mol) and DCC (15.51 g, 0.0752 mol) was mixed under nitrogen. Then 70 ml of DCM (dichloromethane) was added followed by DIPA (Di-isopropylamine) (11.77 mL, 0.1163 mol). Reaction mixture was stirred at RT (23°C) for 30 minutes. Isosorbide (5 g, 0.0342 mol) was added under nitrogen to the above reaction mixture. Immediately the reaction mixture color changes to pale yellow. The above reaction mixture was stirred at RT for 48 hours. Reaction was quenched with water 950 mL. Organic layer was extracted and dried on sodium sulfate. Solvent was evaporated and solid was diluted with again DCM. Insoluble solid was found to be dicyclohexylurea which was filtered. Soluble fraction was evaporated, dried and characterized. Isosorbide acetate ester (donor molecule 2) obtained in ~ 94% yield. Structure of the resultant molecule was established using 1H, 13C-NMR and FTIR analysis. Melting point of isosorbide was found to be 60 °C. Melting point of ISAE was found to be 110-112 °C. FTIR spectra of Isosorbide acetate ester (ISAE) is provided at FIG. 2.
[00115] Synthesis of Isomannide benzoate ester (IMBE):
omann e
[00116] In a clean 250 ml round bottom flask (RBF), benzoic acid (8.35 g, 0.0680 mol) and DCC (15.51 g, 0.0752 mol) was mixed under nitrogen. Then 70 ml of DCM (dichloromethane) was added followed by DIPA (Di-isopropyl amine) (11.77 mb, 0.1163 mol). Reaction mixture was stirred at RT (23 °C) for 30 minutes. Isomannide (5 g, 0.0341 mol) was added under nitrogen to the above reaction mixture. Immediately the reaction mixture color changes to pale yellow. The above reaction mixture was stirred at RT for 48 hours. Reaction was quenched with water 950 mL. Organic layer was extracted and dried on sodium sulfate. Solvent was evaporated and solid was diluted with again DCM. Insoluble solid was found to be dicyclohexylurea which was filtered. Soluble fraction was evaporated, dried and characterized. Isomannide benzoate ester (donor molecule 3) obtained in ~ 43% yield. Structure of the resultant molecule was established using 1H, 13C-NMR and FTIR analysis. Melting Point of isomannide was found to be 80-85 °C. Melting point of IMBE was found to be 109-112°C. FTIR spectra, ’H-NMR spectra and 13C- NMR spectra of IMBE are provided at FIGs. 3A-3C, respectively.
[00118] In a clean 250 ml round bottom flask (RBF), acetic acid (3.91 mL, 0.0680 mol) and DCC (15.51 g, 0.0752 mol) was mixed under nitrogen. Then 70 ml of DCM (dichloromethane) was added followed by DIPA (Di-isopropyl amine) (11.77 mL, 0.1163 mol). Reaction mixture was stirred at RT (23 °C) for 30 minutes. Isomannide (5 g, 0.0341 mol) was added under nitrogen to the above reaction mixture. Immediately the reaction mixture color changes to pale yellow. The above reaction mixture was stirred at RT for 48 hours. Reaction was quenched with
water 950 mL. Organic layer was extracted and dried on sodium sulfate. Solvent was evaporated and solid was diluted with again DCM. Insoluble solid was found to be dicyclohexylurea which was filtered. Soluble fraction was evaporated, dried and characterized. Isomannide acetate ester (donor molecule 4) obtained in ~ 38% yield. Structure of the resultant molecule was established using 1H, 13C-NMR and FTIR analysis. Melting Point of isomannide was found to be 80-85 °C. Melting point of Isomannide acetate ester (IMAE) was found to be 121-125 °C.
SYNTHESIS OF ZIEGLER-NATTA CATALYSTS
[00119] COMPARATIVE EXAMPLE - Synthesis of Ziegler-Natta catalyst using Diisobutylphthalate (DIBP) as internal donor (Cat 1) - using MgCL EtOH adduct as support: [00120] Step 1- MgChEtOH adduct synthesis: Anhydrous MgCF (4.76 g) was taken from glove box in a Schlenk RBF and dry ethanol (10 mL) and 50 mL of dry heptane was syringed. The reaction mixture was heated at 100°C for 1 hour and then cool down to 70°C. DIBP internal donor (varying concentration) was added at 70 °C temperature and again reaction temperature was increased to 100 °C and heated for 2 hours. Reaction mixture was cool down to 70°C and 100 mL dry decane was syringed and stirred vigorously. The ethanol was evaporated at 70°C and then the remaining solvents (heptane + decane) was removed by cannula filtration. The solid obtained was washed with heptane (50 mL * 4) and dried under vacuum for 3 hours. The resultant MgCREtOH adduct was used in step 2 for titanation.
[00121] Step 2 - TiCL treatment to MgCL.EtOH adduct: The above adduct from step 1 was taken in 3-neck RBF and TiCU (30 mL) was added and reaction mixture was heated to 120°C for 2 hours. The reaction mixture was cooled to 90°C and the TiCU was removed by cannula filtration at 90°C temperature. Again TiCU was added and the reaction mixture was heated at 120°C for 1 hour and TiCU was filtered off at 90°C. The addition and removal of TiCU was carried out one more time (total 3 times TiCU treatment). Finally, solid was washed with dry heptane (60 mL * 6) and final washing was given by dry hexane (60 mL * 1). The obtained solid catalyst was dried under vacuum for few hours and then Magnesium and Titanium content was determined. FTIR spectra of catalyst 1 (Cat 1) is provided at FIG. 4. SEM image of catalyst 1 (Cat 1) is provided at FIG. 5. Upon ICP-OES analysis of catalyst 1, Mg content was found to be 15.9% and Ti content was found to be 9.4%.
[00122] Synthesis of Ziegler-Natta catalyst using Isosorbide Benzoate Ester (ISBE) as internal donor (Cat 2) - using MgCh’EtOH adduct as support
[00123] Step 1 -MgCh’EtOH adduct synthesis: Anhydrous MgCF (4.76 g) was taken from glove box in a Schlenk RBF and dry ethanol (10 mL) and 50 mL of dry heptane was syringed. The reaction mixture was heated at 100°C for 1 hour and then cool down to 70°C. ISBE internal donor (varying concentration) was added at 70°C temperature and again reaction temperature was increased to 100°C and heated for 2 hours. Reaction mixture was cool down to 70°C and 100 mL dry decane was syringed and stirred vigorously. The ethanol was evaporated at 70°C and then the remaining solvents (heptane + decane) was removed by cannula filtration. The solid obtained was washed with heptane (50 mL * 4) and dried under vacuum for 3 hours. The resultant MgCF.EtOH adduct was used in step 2 for titanation.
[00124] Step 2 - TiCL treatment to MgCh.EtOH adduct: The above adduct from step 1 was taken in a 3 -neck RBF and TiCU (30 mL) was added and reaction mixture was heated to 120°C for 2 hours. The reaction mixture was cooled to 90°C and the TiCU was removed by cannula filtration at 90°C temperature. Again TiCU was added and the reaction mixture was heated at 120°C for 1 hour and TiCU was filtered off at 90°C. The addition and removal of TiCU was carried out one more time (total 3 times TiCU treatment). Finally, solid was washed with dry heptane (60 mL * 6) and final washing was given by dry hexane (60 mL * 1). The obtained solid catalyst was dried under vacuum for few hours and then Magnesium and Titanium content was determined. SEM image of catalyst 2 (Cat 2) is provided at FIG. 6. Upon ICP-OES analysis of catalyst 2, Mg content was found to be 13.2% and Ti content was found to be 10.4%.
[00125] Synthesis of Ziegler-Natta catalyst using Isosorbide Acetate Ester (ISAE) as internal donor (Cat 3) - using MgCU’EtOH adduct as support
[00126] Step 1 - MgCU.EtOH adduct synthesis: Anhydrous MgCE (4.76 g) was taken from glove box in a Schlenk RBF and dry ethanol (10ml) and 50 mL of dry heptane was syringed. The reaction mixture was heated at 100 °C for 1 hour and then cool down to 70 °C. ISAE internal donor (varying concentration) was added at 70°C temperature and again reaction temperature was increased to 100°C and heated for 2 hours. Reaction mixture was cool down to 70°C and 100 mL dry Decane was syringed and stirred vigorously. The ethanol was evaporated at 70°C and then the remaining solvents (heptane + decane) was removed by cannula filtration. The solid obtained was washed with heptane (50 mL * 4) and dried under vacuum for 3 hours. The resultant MgCE.EtOH adduct was used in step 2 for titanation.
[00127] Step 2 - TiCU treatment to MgCU.EtOH adduct: The above adduct from step 1 was taken in a 3 -neck RBF and T1CI4 (30ml) was added and reaction mixture was heated to 120 °C for 2 hours. The reaction mixture was cooled to 90 °C and the TiCU was removed by cannula filtration at 90 °C temperature. Again TiCU was added and the reaction mixture was heated at 120 °C for 1 hour and TiCU was filtered off at 90 °C. The addition and removal of TiCU was carried out one more time (total 3 times TiCU treatment). Finally, solid was washed with dry heptane (60 mb * 6) and final washing was given by dry hexane (60 mL * 1). The obtained solid catalyst was dried under vacuum for few hours and then Magnesium and Titanium content was determined. Upon ICP-OES analysis of catalyst 3, Mg content was found to be 13.86% and Ti content was found to be 9.19%.
[00128] Synthesis of Ziegler-Natta catalyst using Isomannide Benzoate Ester (IMBE) as internal donor (Cat 4) - using MgCU’EtOH adduct as support
[00129] Step 1 - MgCU.EtOH adduct synthesis: Anhydrous MgCU (4.76 g) was taken from glove box in a Schlenk RBF and dry ethanol (10ml) and 50 mL of dry heptane was syringed. The reaction mixture was heated at 100 °C for 1 hour and then cool down to 70 °C. IMBE internal donor (varying concentration) was added at 70 °C temperature and again reaction temperature was increased to 100 °C and heated for 2 hours. Reaction mixture was cool down to 70 °C and 100 mL dry Decane was syringed and stirred vigorously. The ethanol was evaporated at 70 °C and then the remaining solvents (heptane + decane) was removed by cannula filtration. The solid obtained was washed with heptane (50 mL * 4) and dried under vacuum for 3 hours. The resultant MgCF.EtOH adduct is used for step 2 for titanation.
[00130] Step 2 - TiCU treatment to MgCU.EtOH adduct: The above adduct from step 1 was taken in a 3 -neck RBF and TiCU (30ml) was added and reaction mixture was heated to 120 °C for 2 hours. The reaction mixture was cooled to 90 °C and the TiCU was removed by cannula filtration at 90 °C temperature. Again TiCU was added and the reaction mixture was heated at 120 °C for 1 hour and TiCU was filtered off at 90 °C. The addition and removal of TiCU was carried out one more time (total 3 times TiCU treatment). Finally, solid was washed with dry heptane (60 mL * 6) and final washing was given by dry hexane (60 mL * 1). The obtained solid catalyst was dried under vacuum for few hours and then Magnesium and Titanium content was determined.
[00131] Synthesis of Ziegler-Natta catalyst using Isomannide Acetate Ester (IMAE) as internal donor (Cat 5) - using MgC ’EtOH adduct as support
[00132] Step 1 - MgC .EtOH adduct synthesis: Anhydrous MgCF (4.76 g) was taken from glove box in a Schlenk RBF and dry ethanol (10ml) and 50 mL of dry heptane was syringed. The reaction mixture was heated at 100 °C for 1 hour and then cool down to 70 °C. IMBE internal donor (varying concentration) was added at 70 °C temperature and again reaction temperature was increased to 100 °C and heated for 2 hours. Reaction mixture was cool down to 70 °C and 100 mL dry Decane was syringed and stirred vigorously. The ethanol was evaporated at 70 °C and then the remaining solvents (heptane + decane) was removed by cannula filtration. The solid obtained was washed with heptane (50 mL * 4) and dried under vacuum for 3 hours. The resultant MgCh.EtOH adduct is used for step 2 for titanation.
[00133] Step 2 - TiCl4 treatment to MgCh.EtOH adduct: The above adduct from step 1 was taken in a 3 -neck RBF and TiCI4 (30ml) was added and reaction mixture was heated to 120 °C for 2 hours. The reaction mixture was cooled to 90 °C and the TiCl4 was removed by cannula filtration at 90 °C temperature. Again TiCl4 was added and the reaction mixture was heated at 120 °C for 1 hour and TiCl4 was filtered off at 90 °C. The addition and removal of TiCl4 was carried out one more time (total 3 times TiCl4 treatment). Finally, solid was washed with dry heptane (60 mL * 6) and final washing was given by dry hexane (60 mL * 1). The obtained solid catalyst was dried under vacuum for few hours and then Magnesium and Titanium content was determined.
[00134] COMPARATIVE EXAMPLE - Synthesis of Ziegler-Natta catalyst using Diisobutylphthalate (DIBP) as internal donor (Cat 6)- using MgCF as support:
DI BP g , + TiCL . MgCI2/1WDIBP
[00135] Stepl: Anhydrous MgCF (2.5 g) was taken from glove box in a Schlenk RBF and dry chlorobenzene (~58 mL) was syringed under nitrogen atmosphere. TiCl4 (57.59 mL) was added dropwise using pressure equalizing dropping funnel under nitrogen. Reaction mixture was heated to 130°C for 60 minutes and cool down to the 60-70°C. At this temperature, DIBP (1.40 mL) was added and reaction mixture was heated at 130°C for 60 minutes. Reaction mixture was cool down to 60°C and the solvent was removed using cannula under nitrogen.
[00136] Step 2: Addition of chlorobenzene and TiCU was carried out followed by the heating of the reaction mixture at 130°C for 60 minutes. Again reaction mixture was cool down to 60°C and solvent was removed by cannula under nitrogen atmosphere.
[00137] Step 3: Step 2 was repeated again to obtain the solid catalyst.
[00138] Step4: Solid catalyst obtained was washed using dry hexane (100 ml * 3) and dried under vacuum. Catalyst was stored inside the glove box for further use. Yield of the catalyst was 1.8 g (72 %). FTIR spectra of catalyst 6 (Cat 6) is provided at FIG. 7. Upon ICP-OES analysis of catalyst 1 , Mg content was found to be 23% and Ti content was found to be 2.1%.
[00139] Synthesis of Ziegler-Natta catalyst using Isosorbide Benzoate Ester (ISBE) as internal donor (Cat 7) - using MgCh as support:
[00140] Step 1: Anhydrous MgCF (2.5 g) was taken from glove box in a Schlenk RBF and dry chlorobenzene (~58 mL) was syringed under nitrogen atmosphere. TiCU (57.59 mL) was added dropwise using pressure equalizing dropping funnel under nitrogen. Reaction mixture was heated to 130°C for 60 minutes and cool down to the 60-70°C. At this temperature, Isosorbide Benzoate Ester (ISBE) (1.8 g) was added and reaction mixture was heated at 130°C for 60 minutes. Reaction mixture was cool down to 60°C and the solvent was removed using cannula under nitrogen.
[00141] Step 2: Further, addition of chlorobenzene and TiCU was carried out followed by the heating of reaction mixture at 130°C for 60 minutes. Again reaction mixture was cool down to
60°C and solvent was removed by cannula under nitrogen atmosphere.
[00142] Step 3: Step 2 was repeated again to obtain the solid catalyst.
[00143] Step 4: Solid catalyst obtained from step 3 was washed using dry hexane (100 mL *
3) and dried under vacuum. Catalyst was stored inside the glove box for further use. Yield was found to be 2 g (80 %). FTIR spectra of catalyst 7 (Cat 7) is provided at FIG. 8. Upon ICP-OES analysis of catalyst 7, Mg content was found to be 1.4% and Ti content was found to be 1.6%.
[00144] Synthesis of Ziegler-Natta catalyst using Isosorbide Benzoate Ester (ISBE) as internal donor (Cat8) - using Mg(OEt)z as support:
[00145] Step 1: Magnesium ethoxide (2.5 gm) was taken in 3-neck RBF and toluene (25 mL) was syringed under nitrogen atmosphere. The reaction mixture was heated to 90 °C for 10 minutes. Isosorbide Benzoate Ester based donor (ISBE) (1.54 gm) was added. TiCU (5 mL) was added at 0 °C dropwise using pressure equalizing dropping funnel under nitrogen. The reaction mixture was heated at 110 °C for 2 hours. The temperature of the reaction mixture was then maintained to 90° C and the toluene was filtered out at 90°C. Solid was washed with toluene twice.
[00146] Step 2: Again, toluene (25 mL) and TiCU (5 mL) was added and reaction mixture was heated to 110°C for 2 hours. Reaction mixture is then maintained to 90 °C and filtration was carried out.
[00147] Step 3: Solid catalyst obtained was washed twice with toluene (25 mL) and 5 times with heptane (25 mL) at 90 °C. The catalyst was dried under vacuum for few hours and then magnesium and titanium contents were determined. From UV analysis Ti content was found to be 9.8% and from EDTA titration, Mg content was found to be 12 %.
[00148] Similarly, Cat 9-11 were synthesized using different electron donors such as ISAE, IMBE, and IMAE.
PROPYLENE AND ETHYLENE POLYMERIZATION
[00149] Polymerization reactions were performed in high pressure Polyclave reactor. Before polymerization, reactor was kept for baking under vacuum at 100°C for 1 hour. Reactor was then cool down to 30°C and then kept under nitrogen flow (1 bar). Simultaneously, Ziegler-Natta catalyst (prepared in examples above i.e. catalysts 1-9) was weighed inside the glove box. Freshly distilled hexane (400 mL + 100 mL) was taken into two addition vessels under nitrogen. Appropriate amount of co-catalyst was transferred to the solvent containing vessels (half cocatalyst in 400 mL solvent vessel and half co-catalyst in 100 mL solvent vessel). Then external donor (if required) was added to the 100 mL solvent vessel. Then the catalyst was also added to 100 mL solvent vessel and stirred for 5 minutes. Simultaneously, reactor was kept under positive propylene flow and the mixture from 100 mL vessel with catalyst, co-catalyst and external donor was transferred to the high pressure reactor under positive propylene flow. After that the 400 mL of solvent was transferred to the reactor and immediately stirring and heating of the reactor was turned on. Polymerization reactions were run for 2 hours at 80°C temperature with 2.5 bar of
propylene pressure. After that, the reactor was vented-off and the polymerization reaction was quenched by acidic methanol. The obtained solid precipitate was filtered-off and dried at 60°C inside the hot air oven. Table 1 below provide details of the polymerization reactions.
TEAL: triethylaluminum; CHMDMS : cyclohexyl methyl dimethoxysilane
[00150] Data pertaining to DSC analysis of the resultant polypropylene polymers is provided in Table 2 below:
[00151] SEM images of the resultant polypropylene, according to Exp. 7-9, are provided at FIG. 9A-9C, respectively. Powder XRD data pertaining to the resultant polypropylene, according to Exp. 5-8, are provided at FIG. 10A-10D, respectively.
[00152] Similarly, ethylene polymerization was also carried out, details wherefore is summarized in Table 3 below.
♦catalyst used 50mg
[00153] Data pertaining to DSC analysis of the resultant polyethylene polymers is provided in
[00154] SEM images of the resultant polyethylene (corresponding to Exp. nos. 2a, 4a and 8a) are provided at FIGS. 11A-C. Powder XRD data pertaining to the resultant polyethylene (corresponding to Exp. nos. la, 2a and 3a) is also provided at FIGS. 12A-C.
[00155] From the above experiments, it could be concluded that the synthesized catalyst using biobased internal electron donors are able to produce polyolefin such as polypropylene and polyethylene. The polypropylene obtained herein showed melting temperature in the range of 154°C to 162 °C, which is in good match with the polypropylene produced by phthalate based catalyst. Similarly, for polyethylene, the melting temperature was in the range of 134°C to 136 °C which is well comparable with the polyethylene produced by conventional Ziegler-Natta catalysts.
ADVANTAGES
[00156] The present disclosure provides internal electron donors that overcome one or more shortcomings of the conventional internal electron donors in Ziegler-Natta catalysts.
[00157] The present disclosure provides a method for production of internal electron donors.
[00158] The present disclosure provides Ziegler-Natta catalysts that overcome one or more shortcomings of the conventional Ziegler-Natta catalysts.
[00159] The present disclosure provides Ziegler-Natta catalyst that is non-toxic, environment friendly and commercially viable.
[00160] The present disclosure provides a method of production of polypropylene that is nontoxic, environment friendly and commercially viable.
Claims
1. A method for preparing a Ziegler-Natta catalyst, said method comprising at least the step of mixing a magnesium support with a transition metal halide in presence of an internal donor compound of formula I or an isomer or mixtures thereof:
wherein Ri and R2, independent of each other, is selected from C 1 to C« alkyl group, G, to C12 aryl group, and Ce to C12 heteroaryl group.
2. The method as claimed in claim 1, wherein Ri and R2 in the internal donor compound of formula I, independent of each other, are selected from methyl and phenyl.
3. The method as claimed in claim 1 or 2, wherein the magnesium support is selected from MgCh and an adduct MgCh.mRsOH, wherein R3 represents linear or branched alkyl group with 1 to 12 carbon atoms, and m ranges betweenl to 6.
4. The method as claimed in one or more of claims 1 to 3, wherein the magnesium support is selected from Mg(OR4)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms.
5. The method as claimed in one or more of claims 1 to 4, wherein the step of mixing comprises:
(a) mixing MgCh with an alcohol of formula R3OH at a temperature ranging from 50°C to 150°C in presence of the internal donor compound of formula I or isomer or mixtures thereof to obtain an internal donor treated magnesium support, wherein R3 represents linear or branched alkyl group with 1 to 12 carbon atoms;
(b) mixing the internal donor treated magnesium support from step (a) with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain the Ziegler-Natta catalyst. The method as claimed in claim 5, wherein R3 in the alcohol of formula R3OH is ethyl group, and wherein the transition metal halide is titanium halide. The method as claimed in one or more of claims 1 to 4, wherein the step of mixing comprises:
(a) mixing the magnesium support with the transition metal halide at a temperature ranging from 50°C to 150°C to obtain a reaction mixture; and
(b) adding the internal donor compound of formula I or the isomer or mixtures thereof to the reaction mixture of step (a) at a temperature ranging from 50°C to 150°C to obtain the Ziegler-Natta catalyst. The method as claimed in any one of the claims 1-7, wherein the internal donor compound of formula I is selected from a compound having formula la or formula lb:
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, Ce to C 12 aryl group, and Ce to C12 heteroaryl group. The method as claimed in any one of the claims 1-8, wherein the internal donor compound is selected from:
(a) an internal donor compound of formula I or an isomer or mixtures thereof
wherein R| and R2, independent of each other, is selected from C 1 to C« alkyl group, C to C12 aryl group, and Ce to C12 heteroaryl group;
(b) a transition metal halide; and
(c) a magnesium support. The catalyst as claimed in claim 10, wherein Ri and R2 in the internal donor compound of formula I, independent of each other, are selected from methyl and phenyl. The catalyst as claimed in claim 10 or 11, wherein the magnesium support is selected from MgCh and an adduct MgCh.mRsOH, wherein R3 represents linear or branched alkyl group with 1 to 12 carbon atoms, and m ranges between 1 to 6.
The catalyst as claimed in claim 10 or 11, wherein the magnesium support is selected from Mg(OR4)2, where R4 represents linear or branched alkyl group with 1 to 12 carbon atoms. The catalyst as claimed in one or more of claims 10 to 13, wherein the transition metal halide is titanium halide. The catalyst as claimed in any one of the claims 10-14, wherein the internal donor compound of formula I is selected from a compound having formula la or formula lb:
wherein Ri and R2, independent of each other, is selected from Ci to C« alkyl group, G, to C^aryl group, and Ce to C12 heteroaryl group. The catalyst as claimed in any one of the claims 10-15, wherein the internal donor compound is selected from:
A method for preparing polyolefin obtained from olefin polymerization in presence of the Ziegler-Natta catalyst obtained from the method as claimed in one or more of claims 1 to 9 or the Ziegler-Natta catalyst as claimed in one or more of claims 10 to 16. A polyolefin obtained from the method as claimed in claim 17.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IN202221040674 | 2022-07-15 | ||
IN202221040674 | 2022-07-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2024013759A1 true WO2024013759A1 (en) | 2024-01-18 |
Family
ID=85277998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IN2023/050106 WO2024013759A1 (en) | 2022-07-15 | 2023-02-03 | Method for preparation of novel ziegler-natta catalyst for olefin polymerization |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2024013759A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4971937A (en) | 1988-09-30 | 1990-11-20 | Himont Incorporated | Components and catalysts for the polymerization of olefins |
US20080214881A1 (en) | 2006-03-01 | 2008-09-04 | Ineos Usa Llc | Propylene polymer catalyst donor component |
US9284392B2 (en) | 2013-03-15 | 2016-03-15 | Basf Corporation | Mixed internal donor structures for 1-olefin polymerization catalysts |
CN107417813A (en) * | 2016-05-23 | 2017-12-01 | 北京利和知信科技有限公司 | A kind of ingredient of solid catalyst and catalyst for olefinic polymerization |
WO2019094347A1 (en) * | 2017-11-13 | 2019-05-16 | W.R. Grace & Co.-Conn. | Catalyst components for propylene polymerization |
-
2023
- 2023-02-03 WO PCT/IN2023/050106 patent/WO2024013759A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4971937A (en) | 1988-09-30 | 1990-11-20 | Himont Incorporated | Components and catalysts for the polymerization of olefins |
US20080214881A1 (en) | 2006-03-01 | 2008-09-04 | Ineos Usa Llc | Propylene polymer catalyst donor component |
US9284392B2 (en) | 2013-03-15 | 2016-03-15 | Basf Corporation | Mixed internal donor structures for 1-olefin polymerization catalysts |
CN107417813A (en) * | 2016-05-23 | 2017-12-01 | 北京利和知信科技有限公司 | A kind of ingredient of solid catalyst and catalyst for olefinic polymerization |
WO2019094347A1 (en) * | 2017-11-13 | 2019-05-16 | W.R. Grace & Co.-Conn. | Catalyst components for propylene polymerization |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2867264B1 (en) | Catalyst composition for polymerization of olefins | |
JP2000516987A (en) | Olefin polymerization components and catalysts | |
WO2014118164A1 (en) | Catalyst composition for polymerization of olefins | |
CN103819586B (en) | A kind of catalyst system for olefinic polyreaction | |
EP4038108A1 (en) | Process for polymerization of polypropylene using ziegler-natta procatalyst with novel 1,3-diether internal electron donors | |
CN110016093A (en) | Ingredient of solid catalyst and catalyst system and olefine polymerizing process for olefinic polymerization | |
CN108727524B (en) | Internal electron donor compound and catalyst for catalyzing propylene polymerization | |
EP3033348A1 (en) | Catalyst system for polymerisation of an olefin | |
RU2630228C1 (en) | Catalyst components for polymerisation of olefins | |
HUE034931T2 (en) | Catalysts for preparing ultra high molecular weight polyethylene (uhmwpe) | |
WO2009141831A2 (en) | A catalyst system for polymerization of olefins | |
CN104250319B (en) | Olefin polymerization catalyst system | |
CN103380135B (en) | Zirconium complex based on N-heterocycle carbine for lactone ring-opening polymerisation | |
EP2751059B1 (en) | Process for preparing di-substituted succinates | |
CN104250317A (en) | Olefin polymerization catalyst | |
CN107987189B (en) | Catalyst component for olefin polymerization and preparation method and application thereof | |
JP4976129B2 (en) | Ziegler-Natta catalyst for polyolefin | |
WO2024013759A1 (en) | Method for preparation of novel ziegler-natta catalyst for olefin polymerization | |
CN104558312B (en) | The preparation method and its polymer of a kind of olefin polymer | |
CN102746425B (en) | Alkene polymerization catalyst with thienyl substituting silane | |
CN107987196A (en) | For catalyst constituent for olefinic polymerization and its catalyst | |
CN107250170A (en) | The manufacture method of olefin polymerization catalysis and olefin oligomer | |
CN104558339B (en) | A kind of production method of impact polypropylene | |
CN103788258B (en) | A kind of polymerization of propylene | |
CN104250318A (en) | Olefin polymerization catalyst |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 23705690 Country of ref document: EP Kind code of ref document: A1 |