EP2326617A1 - Verfahren zur herstellung von urethanen aus difunktionellen aromatischen aminen und dialkylcarbonaten - Google Patents
Verfahren zur herstellung von urethanen aus difunktionellen aromatischen aminen und dialkylcarbonatenInfo
- Publication number
- EP2326617A1 EP2326617A1 EP09781929A EP09781929A EP2326617A1 EP 2326617 A1 EP2326617 A1 EP 2326617A1 EP 09781929 A EP09781929 A EP 09781929A EP 09781929 A EP09781929 A EP 09781929A EP 2326617 A1 EP2326617 A1 EP 2326617A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- carbonate
- bis
- aromatic amines
- reaction
- heteroatoms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 150000003673 urethanes Chemical class 0.000 title claims abstract description 12
- 150000004982 aromatic amines Chemical class 0.000 title claims description 15
- 150000004649 carbonic acid derivatives Chemical class 0.000 title claims description 6
- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 25
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims abstract description 16
- 125000005842 heteroatom Chemical group 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 5
- 150000004984 aromatic diamines Chemical class 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 29
- VOZKAJLKRJDJLL-UHFFFAOYSA-N 2,4-diaminotoluene Chemical compound CC1=CC=C(N)C=C1N VOZKAJLKRJDJLL-UHFFFAOYSA-N 0.000 claims description 8
- 125000003277 amino group Chemical group 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 150000004703 alkoxides Chemical class 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- DYFXGORUJGZJCA-UHFFFAOYSA-N phenylmethanediamine Chemical compound NC(N)C1=CC=CC=C1 DYFXGORUJGZJCA-UHFFFAOYSA-N 0.000 claims description 3
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 claims description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- 229910052736 halogen Inorganic materials 0.000 claims description 2
- 150000002367 halogens Chemical class 0.000 claims description 2
- 229940018564 m-phenylenediamine Drugs 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 abstract description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000002585 base Substances 0.000 description 13
- 239000000203 mixture Substances 0.000 description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 6
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 description 6
- -1 Uranium salts (US 3 Chemical class 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000012071 phase Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 238000005481 NMR spectroscopy Methods 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000005191 phase separation Methods 0.000 description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 4
- 239000002841 Lewis acid Substances 0.000 description 3
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 150000001340 alkali metals Chemical class 0.000 description 3
- 125000001033 ether group Chemical group 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000007517 lewis acids Chemical class 0.000 description 3
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- STLGQBDVSTWGIP-UHFFFAOYSA-N bis(2-methoxyethyl) carbonate Chemical compound COCCOC(=O)OCCOC STLGQBDVSTWGIP-UHFFFAOYSA-N 0.000 description 2
- 239000007795 chemical reaction product Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- VUPKGFBOKBGHFZ-UHFFFAOYSA-N dipropyl carbonate Chemical compound CCCOC(=O)OCCC VUPKGFBOKBGHFZ-UHFFFAOYSA-N 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002638 heterogeneous catalyst Substances 0.000 description 2
- 239000002815 homogeneous catalyst Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 239000011133 lead Substances 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000012074 organic phase Substances 0.000 description 2
- 125000004430 oxygen atom Chemical group O* 0.000 description 2
- RZXMPPFPUUCRFN-UHFFFAOYSA-N p-toluidine Chemical compound CC1=CC=C(N)C=C1 RZXMPPFPUUCRFN-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- UIICPZFWHBJNIG-UHFFFAOYSA-N sodium;2-methoxyethanolate Chemical compound [Na+].COCC[O-] UIICPZFWHBJNIG-UHFFFAOYSA-N 0.000 description 2
- RCOSUMRTSQULBK-UHFFFAOYSA-N sodium;propan-1-olate Chemical compound [Na+].CCC[O-] RCOSUMRTSQULBK-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- RLYCRLGLCUXUPO-UHFFFAOYSA-N 2,6-diaminotoluene Chemical compound CC1=C(N)C=CC=C1N RLYCRLGLCUXUPO-UHFFFAOYSA-N 0.000 description 1
- FZZMTSNZRBFGGU-UHFFFAOYSA-N 2-chloro-7-fluoroquinazolin-4-amine Chemical compound FC1=CC=C2C(N)=NC(Cl)=NC2=C1 FZZMTSNZRBFGGU-UHFFFAOYSA-N 0.000 description 1
- WDFQBORIUYODSI-UHFFFAOYSA-N 4-bromoaniline Chemical compound NC1=CC=C(Br)C=C1 WDFQBORIUYODSI-UHFFFAOYSA-N 0.000 description 1
- QSNSCYSYFYORTR-UHFFFAOYSA-N 4-chloroaniline Chemical compound NC1=CC=C(Cl)C=C1 QSNSCYSYFYORTR-UHFFFAOYSA-N 0.000 description 1
- CNPURSDMOWDNOQ-UHFFFAOYSA-N 4-methoxy-7h-pyrrolo[2,3-d]pyrimidin-2-amine Chemical compound COC1=NC(N)=NC2=C1C=CN2 CNPURSDMOWDNOQ-UHFFFAOYSA-N 0.000 description 1
- ODGIMMLDVSWADK-UHFFFAOYSA-N 4-trifluoromethylaniline Chemical compound NC1=CC=C(C(F)(F)F)C=C1 ODGIMMLDVSWADK-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methyl-N-phenylamine Natural products CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical class [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 150000001224 Uranium Chemical class 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 125000003963 dichloro group Chemical group Cl* 0.000 description 1
- GGSUCNLOZRCGPQ-UHFFFAOYSA-N diethylaniline Chemical compound CCN(CC)C1=CC=CC=C1 GGSUCNLOZRCGPQ-UHFFFAOYSA-N 0.000 description 1
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- YNESATAKKCNGOF-UHFFFAOYSA-N lithium bis(trimethylsilyl)amide Chemical compound [Li+].C[Si](C)(C)[N-][Si](C)(C)C YNESATAKKCNGOF-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002736 metal compounds Chemical class 0.000 description 1
- GAUSUDNBBOZKSB-UHFFFAOYSA-N methyl(phenyl)carbamic acid Chemical compound OC(=O)N(C)C1=CC=CC=C1 GAUSUDNBBOZKSB-UHFFFAOYSA-N 0.000 description 1
- ZDHOYZBANMCKGV-UHFFFAOYSA-N n,n-dibromoaniline Chemical compound BrN(Br)C1=CC=CC=C1 ZDHOYZBANMCKGV-UHFFFAOYSA-N 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 150000005677 organic carbonates Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- ODZPKZBBUMBTMG-UHFFFAOYSA-N sodium amide Chemical compound [NH2-].[Na+] ODZPKZBBUMBTMG-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 125000001302 tertiary amino group Chemical group 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C269/00—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C269/04—Preparation of derivatives of carbamic acid, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups from amines with formation of carbamate groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C263/00—Preparation of derivatives of isocyanic acid
- C07C263/04—Preparation of derivatives of isocyanic acid from or via carbamates or carbamoyl halides
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C271/00—Derivatives of carbamic acids, i.e. compounds containing any of the groups, the nitrogen atom not being part of nitro or nitroso groups
- C07C271/06—Esters of carbamic acids
- C07C271/08—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms
- C07C271/26—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atom of at least one of the carbamate groups bound to a carbon atom of a six-membered aromatic ring
- C07C271/28—Esters of carbamic acids having oxygen atoms of carbamate groups bound to acyclic carbon atoms with the nitrogen atom of at least one of the carbamate groups bound to a carbon atom of a six-membered aromatic ring to a carbon atom of a non-condensed six-membered aromatic ring
Definitions
- the invention relates to a process for the preparation of bisurethanes by reacting difunctional aromatic amines with a dialkyl carbonate in high yields and selectivities.
- the urethanes produced in this way can be converted into technically relevant isocyanates in further consequence.
- Lewis acids e.g. Uranium salts (US 3,763,217), aluminum shavings with iodine and Hg promoters (US 4,550,188), zinc, iron, antimony and tin salts (US 4,268,683, 4,268,684, EP 391473) used as catalysts.
- Lewis acids e.g. Uranium salts (US 3,763,217), aluminum shavings with iodine and Hg promoters (US 4,550,188), zinc, iron, antimony and tin salts (US 4,268,683, 4,268,684, EP 391473) used as catalysts.
- Disadvantages for the industrial use of these processes are the sometimes low conversions, low selectivities or both.
- WO 2007/015852 describes the use of Lewis acid heterogeneous catalysts for the urethanization of aromatic amines. This eliminates a complicated separation of a homogeneous catalyst. The conversions obtained are too low for large-scale applications and, together with the selectivity, decrease with increasing service life of the heterogeneous catalyst.
- the object of the invention was to develop a process for the preparation of urethanes from difunctional aromatic amines, which -nat enables a urethanization reaction in high space-time yields and selectivities.
- the produced urethanes are to be processed subsequently to technically important aromatic isocyanates.
- the invention relates to processes for the preparation of urethanes by reaction of aromatic diamines with aromatic dialkyl carbonates, characterized in that the alkyl radical of the organic dialkyl carbonate contains 2-18 carbon atoms and one or more heteroatoms and the reaction is carried out in the presence of a catalyst.
- the catalyst is a base.
- the heteroatoms are preferably halogens, in particular chlorine or fluorine, oxygen and nitrogen. In the case of oxygen, this is preferably incorporated as an ether group.
- the nitrogen atoms are preferably incorporated as tertiary amino groups.
- the heteroatoms are preferably located on the ⁇ -carbon atom.
- the alkyl groups may contain one or more heteroatoms. In the case of the halogen atoms, these may be located on one or more carbon atoms.
- the alkyl radicals may also contain aromatic rings.
- the reaction product of the aromatic amine with the dialkyl carbonate is reacted with a protic compound.
- a protic compound is meant a compound that can transfer a proton.
- the protic compound is preferably selected from the group comprising alcohols, water and mixtures of both. Particularly preferred is the use of water.
- the base is preferably used in a molar ratio of 0.05 to 0.5 based on the amino groups, more preferably in a molar ratio of 0.05 to 0.3 based on the amino groups.
- the dialkyl carbonate is preferably used in a molar ratio of dialkyl carbonate to amino groups of from 1: 1 to 10: 1, more preferably from 1: 1 to 3: 1.
- the reaction of the aromatic amine with the dialkyl carbonate in the presence of the base is preferably carried out at a reaction temperature of 60-200 0 C, more preferably at 100-170 0 C. At this temperature, a quantitative conversion of the aromatic amine to the corresponding urethane can be obtained within 0.5-5 hours.
- the reaction is usually carried out at atmospheric pressure, slight overpressure or slight underpressure.
- monofunctional and / or difunctional aromatic amines which preferably do not carry any heteroatoms in the aromatic radical are used.
- Representatives from this group are, for example, aniline, o-, m-, p-toluidine, o-, m-, p-chloroaniline and isomer mixtures, o-, m-, p-bromoaniline and isomer mixtures, o-, m-, p- Trifluoromethylaniline and isomer mixtures, 2,4-, 2,6-, 3,4- and 3,5-dimethyl-, dichloro-, dibromo- and diethylaniline and isomer mixtures, pt-butylaniline, tolylenediamine (TDA), in particular, 2,4- and 2,6-tolylene diamine and isomer mixtures thereof, diaminophenylmethane (MDA), in particular 2,4 '-Diaminophenylmethan, 4,4
- TDA di
- the isomers of toluenediamine and / or the isomers of diaminophenylmethane are preferably used.
- the alkyl chain of the dialkyl carbonate may be unbranched, branched or cyclic. Preferably, the alkyl chain is branched or unbranched.
- the ⁇ -position of the alkyl chain is modified with an oxygen atom. This is preferably present as ether group.
- dialkyl carbonates selected from the group comprising bis-2-methoxyethyl carbonate, bis-2-ethoxyethyl carbonate, bis-2-butoxyethyl carbonate, bis-2-methoxy-1-methyl-ethyl carbonate, bis-2-methoxy-2-methyl-ethyl carbonate.
- the base is preferably basic organic metal compounds, especially compounds of alkali metals. These may be, for example, nitrogen-containing compounds, for example amides, such as sodium amide or silicon atoms, and nitrogen-containing compounds, for example lithium hexamethyldisilazide.
- the base is particularly preferably the alkoxides of alkali metals.
- the alcohol of the metal alcoholate has 2-18, more preferably 2-7 carbon atoms in the AI kyl chain.
- the alkyl chain can be unbranched, branched or cyclic.
- the alkyl chain of the corresponding alcohol of the alcoholate is modified with heteroatoms.
- the heteroatoms may be halogen atoms, preferably fluorine atoms and / or chlorine atoms, more preferably fluorine atoms.
- the heteroatoms are oxygen atoms. These are preferably present as ether groups.
- the dialkyl carbonates and the metal alcoholates are based on the same alcohol. This has the advantage that in the process according to the invention a smaller amount of compounds is present. This reduces the complexity of the process.
- the inventive method comprises the steps
- step b) separation of the products formed in step b) and the aqueous base
- step c) reaction of the aqueous base from step c) into the corresponding nonaqueous base and its recycling in step a) e) isolation of the urethane separated in step c).
- This process can preferably be carried out continuously.
- the urethane is formed in step b).
- This embodiment is shown in Figure 1 when using water as the protic compound and an alkoxide as the base.
- the urethane can be isolated as a solution in an organic solvent or as a pure substance in the form of a melt or a solid.
- the products formed in step b) are the urethane and, when alcoholates are used as the base, the alkoxide.
- stage a) is carried out in step 1 of Figure 1, the process step b) in step 2.
- stages 1 and 2 can be carried out in the same reaction vessel, in a continuous procedure, preferably in different reaction vessels.
- the product from stage 1) can be converted into stage 2) without further work-up.
- stage 3 the reaction of the aqueous phase obtained in stage 2 into the nonaqueous base takes place, in the case of the use of metal alcoholates, the conversion of the hydroxide into the metal alcoholate. This is returned to level 1. Excess alcohol obtained in stage 2 is discharged there or recycled elsewhere in the process.
- the product from step 2) unless it is already present in this form, is separated into a nonaqueous and an aqueous phase. From the organic phase containing the urethane, this is separated and isolated as a solid or melt or used directly in this form in further reaction stages, for example in a thermal cleavage to the corresponding isocyanate.
- the separated urethanes may, if necessary, be purified, for example by washing.
- the suspension was rinsed from the autoclave with a further 50 ml of toluene and combined with 25 ml of water. After phase separation, the organic upper phase was once with 25 ml_ of water washed. The collected water phases were back-extracted with 100 ml of toluene and the combined organic phases were concentrated to dryness. There was obtained a brown, highly viscous oil (16.3 g), which according to NMR spectroscopy in addition to carbonate residues for the most part from the desired bisurethane and only traces of the intermediate Monourethanen exist (molar ratio bisurethane to monourethanes of> 95: ⁇ 5).
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP09781929A EP2326617A1 (de) | 2008-08-22 | 2009-08-18 | Verfahren zur herstellung von urethanen aus difunktionellen aromatischen aminen und dialkylcarbonaten |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP08105102 | 2008-08-22 | ||
| PCT/EP2009/060644 WO2010020621A1 (de) | 2008-08-22 | 2009-08-18 | Verfahren zur herstellung von urethanen aus difunktionellen aromatischen aminen und dialkylcarbonaten |
| EP09781929A EP2326617A1 (de) | 2008-08-22 | 2009-08-18 | Verfahren zur herstellung von urethanen aus difunktionellen aromatischen aminen und dialkylcarbonaten |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2326617A1 true EP2326617A1 (de) | 2011-06-01 |
Family
ID=41136774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09781929A Ceased EP2326617A1 (de) | 2008-08-22 | 2009-08-18 | Verfahren zur herstellung von urethanen aus difunktionellen aromatischen aminen und dialkylcarbonaten |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US8729291B2 (de) |
| EP (1) | EP2326617A1 (de) |
| JP (1) | JP5502085B2 (de) |
| KR (1) | KR20110055596A (de) |
| CN (1) | CN102131770B (de) |
| BR (1) | BRPI0917836A2 (de) |
| WO (1) | WO2010020621A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011036062A2 (de) | 2009-09-22 | 2011-03-31 | Basf Se | Verfahren zur herstellung von isocyanaten |
| WO2011048124A1 (de) | 2009-10-21 | 2011-04-28 | Basf Se | Verfahren zur herstellung von urethanen |
| US8680323B2 (en) * | 2010-01-19 | 2014-03-25 | Basf Se | Process for preparing isocyanates by thermal dissociation of carbamates |
| JP6292124B2 (ja) * | 2012-12-14 | 2018-03-14 | 宇部興産株式会社 | カルバメート化合物の製造方法 |
| JP2015137255A (ja) * | 2014-01-22 | 2015-07-30 | 宇部興産株式会社 | カルバメート化合物の製造方法 |
| TWI613184B (zh) * | 2016-05-24 | 2018-02-01 | 中國石油化學工業開發股份有限公司 | 一種胺基甲酸酯的製造方法 |
| WO2019069209A1 (en) * | 2017-10-02 | 2019-04-11 | Tbf Environmental Technology Inc. | SOLVENT COMPOUNDS FOR USE AS AGENTS OF COALESCENCE |
| WO2019069210A1 (en) | 2017-10-02 | 2019-04-11 | Tbf Environmental Technology Inc. | SOLVENT COMPOUNDS FOR USE AS SUBSTITUTES OF ETHER GLYCOL |
| CN113461533A (zh) * | 2021-06-28 | 2021-10-01 | 中国人民解放军火箭军工程大学 | 一种基于碳酸二醚酯的柴油清洁组分及应用 |
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| DE3202690A1 (de) * | 1981-01-28 | 1982-08-12 | Anic S.P.A., Palermo | Herstellung aromatischer urethane |
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| US3763217A (en) * | 1970-12-03 | 1973-10-02 | Halcon International Inc | Preparation of carbamates |
| US4268683A (en) * | 1980-02-21 | 1981-05-19 | The Dow Chemical Company | Preparation of carbamates from aromatic amines and organic carbonates |
| US4268684A (en) * | 1980-02-25 | 1981-05-19 | The Dow Chemical Company | Preparation of carbamates from aromatic amines and organic carbonates |
| DE3035354A1 (de) * | 1980-09-19 | 1982-04-29 | Bayer Ag, 5090 Leverkusen | Verfahren zur herstellung von n,o-disubstituierten urethanen und ihre verwendung als ausgangsmaterial zur herstellung von organischen isocyanaten |
| US4550188A (en) * | 1984-06-27 | 1985-10-29 | The Dow Chemical Company | Preparation of carbamates |
| US5773643A (en) * | 1987-01-13 | 1998-06-30 | Daicel Chemical Industries, Ltd. | Process for preparation of isocyanate compounds |
| US5789614A (en) * | 1987-01-13 | 1998-08-04 | Daicel Chemical Industries, Ltd. | Process for preparation of aliphatic diisocyanate compounds |
| IT1229144B (it) | 1989-04-07 | 1991-07-22 | Enichem Sintesi | Procedimento per la produzione di carbammati. |
| AU7766098A (en) | 1997-06-05 | 1998-12-21 | Huntsman Ici Chemicals Llc | Method for the preparation of carbamates |
| WO1998056758A1 (en) | 1997-06-09 | 1998-12-17 | Huntsman Ici Chemicals Llc | Process for the production of organic isocyanates |
| WO1999047493A1 (en) * | 1998-03-17 | 1999-09-23 | Huntsman Ici Chemicals Llc | Method for the preparation of organic carbamates |
| CN1324007C (zh) * | 2004-09-17 | 2007-07-04 | 中国科学院成都有机化学有限公司 | 一种氨基甲酸酯的合成方法 |
| KR20080031290A (ko) | 2005-07-20 | 2008-04-08 | 다우 글로벌 테크놀로지스 인크. | 불균질 지지 촉매를 사용한 카르바메이트 공정 |
| CN100369671C (zh) * | 2005-12-01 | 2008-02-20 | 中国科学院山西煤炭化学研究所 | 环己烷丁酸锌用于制备n-取代氨基甲酸酯的方法 |
| EP2036884A1 (de) * | 2007-09-14 | 2009-03-18 | Repsol Ypf S.A. | Verfahren zur Herstellung fluorierter Isocyanate und Carbamate |
| US8921598B2 (en) * | 2008-03-18 | 2014-12-30 | Basf Se | Method for producing urethanes composed of mono and di-functional aromatic amines |
-
2009
- 2009-08-18 CN CN200980132681.4A patent/CN102131770B/zh not_active Expired - Fee Related
- 2009-08-18 KR KR1020117005029A patent/KR20110055596A/ko not_active Abandoned
- 2009-08-18 BR BRPI0917836A patent/BRPI0917836A2/pt active Search and Examination
- 2009-08-18 WO PCT/EP2009/060644 patent/WO2010020621A1/de not_active Ceased
- 2009-08-18 EP EP09781929A patent/EP2326617A1/de not_active Ceased
- 2009-08-18 US US13/058,026 patent/US8729291B2/en not_active Expired - Fee Related
- 2009-08-18 JP JP2011523411A patent/JP5502085B2/ja not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3202690A1 (de) * | 1981-01-28 | 1982-08-12 | Anic S.P.A., Palermo | Herstellung aromatischer urethane |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102131770A (zh) | 2011-07-20 |
| WO2010020621A1 (de) | 2010-02-25 |
| CN102131770B (zh) | 2014-08-06 |
| US20110137067A1 (en) | 2011-06-09 |
| US8729291B2 (en) | 2014-05-20 |
| BRPI0917836A2 (pt) | 2015-11-24 |
| JP2012500784A (ja) | 2012-01-12 |
| JP5502085B2 (ja) | 2014-05-28 |
| KR20110055596A (ko) | 2011-05-25 |
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