CN112619689A - Preparation and application method of catalyst for synthesizing triisononyl trimellitate - Google Patents
Preparation and application method of catalyst for synthesizing triisononyl trimellitate Download PDFInfo
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- CN112619689A CN112619689A CN202110017735.5A CN202110017735A CN112619689A CN 112619689 A CN112619689 A CN 112619689A CN 202110017735 A CN202110017735 A CN 202110017735A CN 112619689 A CN112619689 A CN 112619689A
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- 239000003054 catalyst Substances 0.000 title claims abstract description 55
- YPDXSCXISVYHOB-UHFFFAOYSA-N tris(7-methyloctyl) benzene-1,2,4-tricarboxylate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=C(C(=O)OCCCCCCC(C)C)C(C(=O)OCCCCCCC(C)C)=C1 YPDXSCXISVYHOB-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 230000002194 synthesizing effect Effects 0.000 title claims abstract description 13
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 title claims description 22
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 239000002808 molecular sieve Substances 0.000 claims abstract description 21
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 239000002244 precipitate Substances 0.000 claims abstract description 17
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 239000007787 solid Substances 0.000 claims abstract description 14
- 239000000047 product Substances 0.000 claims abstract description 13
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 239000000126 substance Substances 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 10
- 238000007873 sieving Methods 0.000 claims abstract description 9
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000001257 hydrogen Substances 0.000 claims abstract description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 6
- 238000002791 soaking Methods 0.000 claims abstract description 4
- 238000005886 esterification reaction Methods 0.000 claims description 61
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 40
- 230000032050 esterification Effects 0.000 claims description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- QDTDKYHPHANITQ-UHFFFAOYSA-N 7-methyloctan-1-ol Chemical compound CC(C)CCCCCCO QDTDKYHPHANITQ-UHFFFAOYSA-N 0.000 claims description 24
- 239000004439 Isononyl alcohol Substances 0.000 claims description 24
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 17
- 238000005406 washing Methods 0.000 claims description 17
- 230000002378 acidificating effect Effects 0.000 claims description 15
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 11
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 238000010992 reflux Methods 0.000 claims description 9
- 229910006213 ZrOCl2 Inorganic materials 0.000 claims description 8
- 239000005457 ice water Substances 0.000 claims description 8
- 238000001179 sorption measurement Methods 0.000 claims description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 5
- 239000000706 filtrate Substances 0.000 claims description 5
- 238000005342 ion exchange Methods 0.000 claims description 5
- 230000007935 neutral effect Effects 0.000 claims description 5
- 230000003472 neutralizing effect Effects 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- IPCAPQRVQMIMAN-UHFFFAOYSA-L zirconyl chloride Chemical compound Cl[Zr](Cl)=O IPCAPQRVQMIMAN-UHFFFAOYSA-L 0.000 claims description 5
- 230000032683 aging Effects 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000003786 synthesis reaction Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000035484 reaction time Effects 0.000 abstract description 3
- 239000003377 acid catalyst Substances 0.000 abstract description 2
- 239000006227 byproduct Substances 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 30
- 239000000203 mixture Substances 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 6
- 150000002148 esters Chemical class 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000004014 plasticizer Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 238000005070 sampling Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- -1 titanium metal compounds Chemical class 0.000 description 2
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 125000005591 trimellitate group Chemical group 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007171 acid catalysis Methods 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000007036 catalytic synthesis reaction Methods 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 150000002118 epoxides Chemical class 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000008029 phthalate plasticizer Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000003981 vehicle Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J29/405—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing rare earth elements, titanium, zirconium, hafnium, zinc, cadmium, mercury, gallium, indium, thallium, tin or lead
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/16—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes
- B01J31/18—Catalysts comprising hydrides, coordination complexes or organic compounds containing coordination complexes containing nitrogen, phosphorus, arsenic or antimony as complexing atoms, e.g. in pyridine ligands, or in resonance therewith, e.g. in isocyanide ligands C=N-R or as complexed central atoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/06—Washing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/30—Ion-exchange
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/08—Preparation of carboxylic acid esters by reacting carboxylic acids or symmetrical anhydrides with the hydroxy or O-metal group of organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
- B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to a preparation method of a catalyst for synthesizing triisononyl trimellitate in the technical field of organic chemical industry, which firstly prepares ZrO2Powder, drying the precipitate at the temperature of 100-120 ℃ for 8-16h, grinding the dried precipitate into powder, and sieving the powder by a 100-mesh sieve; then preparing HZSM-5 hydrogen type molecular sieve; mixing the two, soaking in phosphoric acid solution, vacuum filtering, and calcining to obtain the target product [ PO4 ]3‑/ZrO2]-HZSM-5 composite type super strongAn acid catalyst solid. The target product can be used as a catalyst for synthesizing triisononyl trimellitate. It can shorten reaction time, avoid corrosion to equipment, improve reaction selectivity and solve the problems of more by-products and difficult treatment.
Description
Technical Field
The invention relates to a preparation method and an application method of an esterification reaction catalyst for synthesizing triisononyl trimellitate, belonging to the technical field of organic chemical industry.
Background
Plasticizers are substances which are added to polymeric systems to increase their plasticity, flexibility or swellability. Its main function is to weaken the secondary valence bond between polymer molecules, i.e. van der waals force, so that the mobility of polymer molecular chain is increased, and the crystallinity of polymer molecular chain is reduced, i.e. the plasticity of polymer is increased, and mainly the hardness, modulus, transformation temperature and embrittlement temperature of polymer are reduced, and the elongation, flexibility and flexibility of the polymer are raised.
Currently, scientists have developed a variety of promising plasticizers. Firstly, modifying a phthalate plasticizer; secondly, new varieties of plasticizers such as polyester, epoxide, citrate, castor oil, trimellitate, aliphatic dibasic acid ester and the like are developed.
Trimellitate catalysts are broadly classified into molecular sieves, titanates (tetraisopropyl titanate, tetrabutyl titanate, and a mixture of one or more thereof), titanium metal compounds, and composite compositions of tin metal compounds and other compounds. There has been little research on a catalyst for the synthesis of triisononyl trimellitate.
Chinese patent CN101973884A describes a method for synthesizing triisononyl trimellitate (TINTM for short). The method uses a sulfuric acid-free catalytic synthesis process, does not use the traditional sulfuric acid catalysis, but uses titanate as a catalyst, and has no pollution and good product quality.
The Chinese invention patent CN108117666A develops a method for synthesizing a high and low temperature resistant plasticizer triisononyl trimellitate. The method overcomes the defects that the existing common plasticizer has poor cold resistance, can crack, is damaged and the like at low temperature of wires, electric wires and cables for vehicles, and the like, and auxiliary materials are added in the processing process and are mixed by glycidyl ether, a leveling agent, a calcium/zinc stabilizer, a flame retardant system and the like, so that the performance of the TINTM is stronger at high and low temperatures.
One of the catalysts currently used in industrial production is a protonic acid catalyst, such as sulfuric acid. It has low cost and reaction temperature below 180 deg.c, but the catalyst has long catalytic time, serious corrosion to apparatus, oxidation, carbonization and other side reactions, and thus dark color and luster of product and difficult post-treatment. Another commonly used catalyst is titanate, which requires a long reaction time, is not recyclable, and is relatively expensive.
Disclosure of Invention
The invention aims to provide a preparation method and an application method of a catalyst for synthesizing triisononyl trimellitate, which can shorten the reaction time, avoid the corrosion problem to equipment, improve the selectivity of the reaction and solve the problems of more byproducts and difficult treatment.
The purpose of the invention is realized as follows:
1. a preparation method of a catalyst for synthesizing triisononyl trimellitate comprises the following steps:
(1) ZrOCl2∙8H2O is dissolved in deionized water, ZrOCl2The molar concentration of the mixed solution is 0.3-0.8mol/L, the formed solution is placed in an ice water bath, ammonia water with the mass fraction of 25% is dripped into the ice water bath to precipitate the solution, the pH is adjusted to be =10, the aging is carried out for 18-30h, the solution is filtered and washed for many times by deionized water until no chloride ion exists in the filtrate;
(2) drying the precipitate at the temperature of 100-120 ℃ for 8-16h, grinding the precipitate into powder, and sieving the powder by a 100-mesh sieve;
(3) carrying out ion exchange on the ZSM-5 type molecular sieve by using a dilute hydrochloric acid solution with the concentration of 1.0-2.0mol/L, stirring for several hours at the temperature of 90-95 ℃ until the exchange degree reaches more than 97 percent, and obtaining the HZSM-5 hydrogen type molecular sieve; the weight ratio of the HZSM-5 hydrogen type molecular sieve to the precipitate is as follows: 1: (1-3.5).
(4) Grinding the HZSM-5 hydrogen type molecular sieve, sieving with a 100-mesh sieve, mixing with the precipitate sieved with the 100-mesh sieve in the step (2), and adding phosphoric acid with the concentration of 0.2-1.0mol/L according to the proportion of 12-18g/mLSoaking in the solution for 8-16h, filtering, and calcining to obtain target product [ PO4 ]3-/ZrO2]-HZSM-5 composite super acidic catalyst solid.
In the step (4), the weight ratio of the HZSM-5 hydrogen type molecular sieve to the precipitate is as follows: 1: (1-3.5).
The target product [ PO43-/ZrO2]The solid-HZSM-5 composite super acidic catalyst is used as the catalyst for the esterification reaction of trimellitic anhydride and isononyl alcohol, and the dosage of the solid-HZSM-5 composite super acidic catalyst is 0.04 to 0.12 percent of the sum of the weight of trimellitic anhydride and isononyl alcohol.
The invention also discloses an application method of the catalyst for synthesizing triisononyl trimellitate, which comprises the following steps:
(1) esterification reaction: putting raw materials of trimellitic anhydride and isononyl alcohol into an esterification reaction kettle, heating to 122-156 ℃ under the conditions of nitrogen protection and uniform stirring, wherein the molar ratio of the trimellitic anhydride to the isononyl alcohol is 1: (3.2-4.0); after the trimellitic anhydride is completely dissolved in the isononyl alcohol, the temperature is raised to 185 +/-5 ℃, and a catalyst accounting for 0.04-0.12 percent of the total mass ratio of the materials is added, wherein the catalyst is [ PO4 ]3-/ZrO2]-HZSM-5 composite super acidic catalyst solid; keeping the temperature for reaction for 0.5-1h, and simultaneously separating water generated in the esterification process; continuously heating to 218-236 ℃, continuously carrying out constant-temperature reflux, continuously increasing the ester content in the esterification liquid in the reaction kettle, sampling from the bottom of the esterification reaction kettle after reacting for a period of time, and measuring the acid value; when the acid value of the esterification liquid is more than 0.07 mg KOH/g, the constant temperature reflux is continuously carried out; when the acid value of the esterification liquid is measured to be less than or equal to 0.07 mg KOH/g, the esterification reaction is finished, and the next step is carried out;
(2) negative pressure dealcoholization: feeding the esterification solution at the bottom of the esterification reaction kettle into a dealcoholization tower for negative pressure dealcoholization, wherein the vacuum degree of the dealcoholization tower is 0.04-0.08Mpa, the dealcoholization time is 1.5-2.5h, and the dealcoholization temperature is 190 ℃;
(3) alkali washing and water washing: introducing nitrogen into the esterified solution after dealcoholization, and circulating the esterified solution by a heat exchanger at normal pressure to reduce the temperature of a reaction system to 75-105 ℃; adding a proper amount of sodium carbonate solution, and neutralizing to be neutral; then slowly adding distilled water for washing, standing for 0.4-0.6h, layering, and draining off the lower layer white flocculate;
(4) removing low-boiling-point substances: introducing nitrogen, heating to 190 ℃ at 160-; stopping vacuumizing after negative pressure air extraction, introducing nitrogen, stopping heating when the system is recovered to a normal pressure state, and cooling;
(5) adsorption and filtration: transferring the esterification liquid cooled to 70-90 ℃ into a filter, adsorbing and decoloring, and filtering to obtain the qualified triisononyl trimellitate.
The invention has the beneficial effects that the used catalyst is a composite solid super acidic catalyst, and the HZSM-5 carrier has a large amount of pore structures, so that the coordination adsorption capacity of PO4^ 3-is increased, the acid centers on the surface of the catalyst are increased, and stronger acidity is expressed. When the load ratio reaches ZrO2When the percent is not larger than 50 percent, the activity of the catalyst is the highest, and the yield of the product is 98 percent at the highest. And the advantage of good stability due to the molecular sieve is that the ZrO compound passes through2The structure is still complete after the high temperature required for crystal form transformation. [ PO43-/ZrO2]the-HZSM-5 composite solid super acidic catalyst can not only improve the reaction activity of the catalyst, but also the quality of the triisononyl trimellitate product is high. The method has the advantages of simple process, easy operation and no pollution, does not corrode reaction equipment when being applied to esterification reaction at the later stage, improves the production rate of products, and has good economic and environmental feasibility.
Detailed Description
The first embodiment is as follows:
the preparation method of the esterification catalyst specifically comprises the following steps:
(1) weighing a certain amount of ZrOCl2▪8H2Dissolving O in deionized water to obtain ZrOCl2The molar concentration is 0.3mol/L, the solution is placed in an ice water bath, ammonia water with the mass fraction of 25% is dripped into the ice water bath to precipitate the solution, the pH is adjusted to be =10, the solution is aged for 24h, and the solution is filtered and washed by deionized water for many times until no chloride ion exists in the filtrate.
(2) Drying the precipitate at 110 deg.C for 12 hr, grinding, and sieving with 100 mesh sieveSieving, the precipitate component being ZrO2。
(3) And (3) carrying out ion exchange on the ZSM-5 type molecular sieve by using a dilute hydrochloric acid solution with the molar concentration of 2.0mol/L, stirring for several hours at the temperature of 90 ℃, and obtaining the HZSM-5 molecular sieve until the exchange degree reaches more than 97%.
(4) Grinding the HZSM-5 molecular sieve, sieving with a 100-mesh sieve, and mixing with the precipitate obtained in the step (2), wherein ZrO in the precipitate is240 wt% (ZrO) of2The total weight of the two components) and then soaking the mixture in phosphoric acid with the molar concentration of 0.2mol/L for 12 hours according to the proportion of 12g/mL, filtering and roasting to obtain [ PO4 ]3-/ZrO2]-HZSM-5 composite solid super acidic catalyst.
The [ PO4 ]3-/ZrO2]the-HZSM-5 composite solid super acidic catalyst is used for preparing triisononyl trimellitate and is used as a catalyst for esterification reaction of trimellitic anhydride and isononyl alcohol, and the dosage of the catalyst is 0.04-0.12 percent of the sum of the weight of trimellitic anhydride and isononyl alcohol.
The concrete application is as follows:
esterification reaction: putting raw materials of trimellitic anhydride and isononyl alcohol into an esterification reaction kettle, heating to 122 ℃ under the conditions of nitrogen protection and uniform stirring, wherein the molar ratio of the trimellitic anhydride to the isononyl alcohol is 1: 3.2; after the trimellitic anhydride is completely dissolved in the isononyl alcohol, the temperature is raised to 180 ℃, and a catalyst accounting for 0.04 percent of the total mass of the materials is added, wherein the catalyst is [ PO4 ]3-/ZrO2]-HZSM-5 composite super acidic catalyst solid; keeping the temperature for reaction for 0.5h, and simultaneously separating water generated in the esterification process; continuously heating to 218 ℃, continuously carrying out constant-temperature reflux, continuously increasing the ester content in the esterification liquid in the reaction kettle, sampling from the bottom of the esterification reaction kettle after reacting for a period of time, and measuring the acid value; when the acid value of the esterification liquid is more than 0.07 mgKOH/g, constant-temperature reflux is continuously carried out; when the acid value of the esterification liquid is measured to be less than or equal to 0.07 mg KOH/g, the esterification reaction is finished, and the next step is carried out;
(2) negative pressure dealcoholization: feeding the esterification solution at the bottom of the esterification reaction kettle into a dealcoholization tower for negative pressure dealcoholization, wherein the vacuum degree of the dealcoholization tower is 0.04Mpa, the dealcoholization time is 1.5h, and the dealcoholization temperature is 190 ℃;
(3) alkali washing and water washing: introducing nitrogen into the esterified solution after dealcoholization, and circulating the esterified solution by a heat exchanger at normal pressure to reduce the temperature of a reaction system to 75 ℃; adding a proper amount of sodium carbonate solution, and neutralizing to be neutral; then slowly adding distilled water for washing, standing for 0.4h, layering, and draining white flocculate at the lower layer;
(4) removing low-boiling-point substances: introducing nitrogen, heating to 160 ℃, vacuumizing to the vacuum degree of 0.04Mpa, removing low-boiling-point substances and residual isononyl alcohol in the reaction system under negative pressure, and exhausting for 1.5h under negative pressure; stopping vacuumizing after negative pressure air extraction, introducing nitrogen, stopping heating when the system is recovered to a normal pressure state, and cooling;
(5) adsorption and filtration: transferring the esterification liquid cooled to 70 ℃ into a filter, adsorbing and decoloring, and filtering to obtain qualified triisononyl trimellitate with the product yield of 96%.
Example two:
the preparation method of the esterification catalyst specifically comprises the following steps:
(1) weighing a certain amount of ZrOCl2▪8H2Dissolving O in deionized water, ZrOCl2The mixture is placed in an ice water bath with the molar concentration of 0.5mol/L, ammonia water with the mass fraction of 25% is dripped into the mixture to precipitate the mixture, the pH is adjusted to be =10, the mixture is aged for 18h, and the mixture is filtered and washed by deionized water for many times until no chloride ion exists in the filtrate.
(2) Drying the precipitate at 110 deg.C for 12 hr, grinding, and sieving with 100 mesh sieve to obtain ZrO2And (3) powder.
(3) And (3) carrying out ion exchange on the ZSM-5 type molecular sieve by using a dilute hydrochloric acid solution with the molar concentration of 1.5mol/L, stirring for several hours at the temperature of 92 ℃ until the exchange degree reaches more than 97 percent, and thus obtaining the HZSM-5 molecular sieve.
(4) Grinding the HZSM-5 molecular sieve to pass through a 100-mesh sieve, and mixing with the ZrO obtained in the step (2)2According to 50 wt% each (ZrO)2The total weight of the two components) is mixed, then the mixture is soaked in phosphoric acid with the molar concentration of 0.6mol/L for 12 hours according to the proportion of 15g/mL, and then the mixture is filtered and roasted to obtain [ PO4 ]3-/ZrO2]-HZSM-5 composite solid super acidic catalyst.
The following applies:
esterification reaction: putting raw materials of trimellitic anhydride and isononyl alcohol into an esterification reaction kettle, heating to 160 ℃ under the conditions of nitrogen protection and uniform stirring, wherein the molar ratio of the trimellitic anhydride to the isononyl alcohol is 1: 3.5; after the trimellitic anhydride is completely dissolved in the isononyl alcohol, the temperature is raised to 185 ℃, and a catalyst accounting for 0.08 percent of the total mass of the materials is added, wherein the catalyst is [ PO4 ]3-/ZrO2]-HZSM-5 composite super acidic catalyst solid; keeping the temperature for reaction for 0.7h, and simultaneously separating water generated in the esterification process; continuously heating to 225 ℃, continuously carrying out constant-temperature reflux, continuously increasing the ester content in the esterification liquid in the reaction kettle, sampling from the bottom of the esterification reaction kettle after reacting for a period of time, and measuring the acid value; when the acid value of the esterification liquid is more than 0.07 mgKOH/g, constant-temperature reflux is continuously carried out; when the acid value of the esterification liquid is determined to be 0.06 mg KOH/g, the esterification reaction is finished, and the next step is carried out;
(2) negative pressure dealcoholization: feeding the esterification solution at the bottom of the esterification reaction kettle into a dealcoholization tower for negative pressure dealcoholization, wherein the vacuum degree of the dealcoholization tower is 0.08Mpa, the dealcoholization time is 2.5 hours, and the dealcoholization temperature is 180 ℃;
(3) alkali washing and water washing: introducing nitrogen into the esterified solution after dealcoholization, and circulating the esterified solution by a heat exchanger at normal pressure to reduce the temperature of the reaction system to 90 ℃; adding a proper amount of sodium carbonate solution, and neutralizing to be neutral; then slowly adding distilled water for washing, standing for 0.5h, layering, and draining white flocculate at the lower layer;
(4) removing low-boiling-point substances: introducing nitrogen, heating to 175 ℃, vacuumizing to the vacuum degree of 0.06Mpa, removing low-boiling-point substances and residual isononyl alcohol in the reaction system under negative pressure, and exhausting for 2.0h under negative pressure; stopping vacuumizing after negative pressure air extraction, introducing nitrogen, stopping heating when the system is recovered to a normal pressure state, and cooling;
(5) adsorption and filtration: transferring the esterification liquid cooled to 80 ℃ into a filter, adsorbing, decoloring and filtering to obtain qualified triisononyl trimellitate with the product yield of 98%.
Example three:
the preparation method of the esterification catalyst specifically comprises the following steps:
(1) weighing a certain amount of ZrOCl2▪8H2Dissolving O in deionized water with the molar concentration of 0.8mol/L, placing in an ice water bath, dropwise adding ammonia water with the mass fraction of 25% into the ice water bath to precipitate, adjusting the pH to be =10, aging for 30h, performing suction filtration, and washing with deionized water for multiple times until no chloride ions exist in the filtrate.
(2) Drying the precipitate at 110 deg.C for 12 hr, grinding, and sieving with 100 mesh sieve to obtain ZrO2And (3) powder.
(3) And (3) carrying out ion exchange on the ZSM-5 type molecular sieve by using a dilute hydrochloric acid solution with the molar concentration of 1.0mol/L, stirring for several hours at the temperature of 95 ℃ until the exchange degree reaches more than 97 percent, and thus obtaining the HZSM-5 molecular sieve.
(4) Grinding HZSM-5 molecular sieve, sieving with 100 mesh sieve, and mixing with ZrO2Mixing the powders, wherein ZrO2In an amount of 60wt% (ZrO)2The total weight of the two components) and then soaking the mixture in phosphoric acid with the molar concentration of 1.0mol/L for 12 hours according to the proportion of 18g/mL, filtering and roasting to obtain [ PO4 ]3-/ZrO2]-HZSM-5 composite solid super acidic catalyst.
The following applies:
esterification reaction: putting raw materials of trimellitic anhydride and isononyl alcohol into an esterification reaction kettle, heating to 156 ℃ under the conditions of nitrogen protection and uniform stirring, wherein the molar ratio of the trimellitic anhydride to the isononyl alcohol is 1: 4.0; after the trimellitic anhydride is completely dissolved in the isononyl alcohol, the temperature is raised to 190 ℃, and a catalyst accounting for 0.12 percent of the total mass of the materials is added, wherein the catalyst is [ PO4 ]3-/ZrO2]-HZSM-5 composite super acidic catalyst solid; keeping the temperature for reaction for 1.0h, and simultaneously separating water generated in the esterification process; continuously heating to 236 ℃, continuously carrying out constant-temperature reflux, continuously increasing the ester content in the esterification liquid in the reaction kettle, sampling from the bottom of the esterification reaction kettle after reacting for a period of time, and measuring the acid value; when the acid value of the esterification liquid is more than 0.07 mgKOH/g, constant-temperature reflux is continuously carried out; when the acid value of the esterification solution is determined to be 0.065 mg KOH/g, the esterification reaction is finished, and the next step is carried out;
(2) negative pressure dealcoholization: feeding the esterification solution at the bottom of the esterification reaction kettle into a dealcoholization tower for negative pressure dealcoholization, wherein the vacuum degree of the dealcoholization tower is 0.06Mpa, the dealcoholization time is 2.0h, and the dealcoholization temperature is 170 ℃;
(3) alkali washing and water washing: introducing nitrogen into the esterified solution after dealcoholization, and circulating the esterified solution by a heat exchanger at normal pressure to reduce the temperature of the reaction system to 105 ℃; adding a proper amount of sodium carbonate solution, and neutralizing to be neutral; then slowly adding distilled water for washing, standing for 0.6h, layering, and draining white flocculate at the lower layer;
(4) removing low-boiling-point substances: introducing nitrogen, heating to 190 ℃, vacuumizing to the vacuum degree of 0.08Mpa, removing low-boiling-point substances and residual isononyl alcohol in the reaction system under negative pressure, and extracting for 2.5 hours under negative pressure; stopping vacuumizing after negative pressure air extraction, introducing nitrogen, stopping heating when the system is recovered to a normal pressure state, and cooling;
(5) adsorption and filtration: transferring the esterification liquid cooled to 90 ℃ into a filter, adsorbing and decoloring, and filtering to obtain qualified triisononyl trimellitate with the product yield of 97%.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.
Claims (5)
1. A preparation method of a catalyst for synthesizing triisononyl trimellitate is characterized by comprising the following steps:
(1) ZrOCl2∙8H2Dissolving O in deionized water, placing in an ice water bath, dropwise adding ammonia water with the mass fraction of 25% into the deionized water to precipitate the O, adjusting the pH to be =10, aging for 18-30h, performing suction filtration, and washing with deionized water for multiple times until no chloride ions exist in the filtrate;
(2) drying the precipitate at the temperature of 100-120 ℃ for 8-16h, grinding the precipitate into powder, and sieving the powder by a 100-mesh sieve;
(3) carrying out ion exchange on the ZSM-5 type molecular sieve by using a dilute hydrochloric acid solution with the concentration of 1.0-2.0mol/L, stirring for several hours at the temperature of 90-95 ℃ until the exchange degree reaches more than 97 percent, and obtaining the HZSM-5 hydrogen type molecular sieve;
(4) grinding HZSM-5 hydrogen type molecular sieve to pass through 100 mesh sieve, andmixing the precipitates sieved by the 100-mesh sieve in the step (2), soaking in a phosphoric acid solution with the concentration of 0.2-1.0mol/L for 8-16h according to the proportion of 12-18g/mL, carrying out suction filtration and roasting to obtain a target product [ PO4 ]3-/ZrO2]-HZSM-5 composite super acidic catalyst solid.
2. The method for preparing a catalyst for the synthesis of triisononyl trimellitate as defined in claim 1, wherein in step (1), ZrOCl is added2∙8H2ZrOCl obtained after O is dissolved in deionized water2The molar concentration of (b) is 0.3-0.8 mol/L.
3. The method for preparing the triisononyl trimellitate catalyst according to claim 1, wherein the weight ratio of the HZSM-5 hydrogen type molecular sieve to the precipitate in the step (4) is as follows: 1: (1-3.5).
4. The method for using the catalyst for synthesizing triisononyl trimellitate according to claims 1-3, characterized in that the catalyst is used as a catalyst for esterification of trimellitic anhydride and isononyl alcohol in an amount of 0.04-0.12% by weight of the sum of trimellitic anhydride and isononyl alcohol.
5. The application method of the catalyst for synthesizing triisononyl trimellitate is characterized by comprising the following steps of:
(1) esterification reaction: putting raw materials of trimellitic anhydride and isononyl alcohol into an esterification reaction kettle, heating to 122-156 ℃ under the conditions of nitrogen protection and uniform stirring, wherein the molar ratio of the trimellitic anhydride to the isononyl alcohol is 1: (3.2-4.0); after the trimellitic anhydride is completely dissolved in isononyl alcohol, the temperature is raised to 185 +/-5 ℃, and a catalyst is added, wherein the catalyst is [ PO4 ]3-/ZrO2]-HZSM-5 composite super acidic catalyst solid; keeping the temperature for reaction for 0.5-1h, and simultaneously separating water generated in the esterification process; continuously heating to 218-Measuring the acid value; when the acid value of the esterification liquid is more than 0.07 mg KOH/g, the constant temperature reflux is continuously carried out; when the acid value of the esterification liquid is measured to be less than or equal to 0.07 mg KOH/g, the esterification reaction is finished, and the next step is carried out;
(2) negative pressure dealcoholization: feeding the esterification solution at the bottom of the esterification reaction kettle into a dealcoholization tower for negative pressure dealcoholization, wherein the vacuum degree of the dealcoholization tower is 0.04-0.08Mpa, the dealcoholization time is 1.5-2.5h, and the dealcoholization temperature is 190 ℃;
(3) alkali washing and water washing: introducing nitrogen into the esterified solution after dealcoholization, and circulating the esterified solution by a heat exchanger at normal pressure to reduce the temperature of a reaction system to 75-105 ℃; adding a proper amount of sodium carbonate solution, and neutralizing to be neutral; then slowly adding distilled water for washing, standing for 0.4-0.6h, layering, and draining off the lower layer white flocculate;
(4) removing low-boiling-point substances: introducing nitrogen, heating to 190 ℃ at 160-; stopping vacuumizing after negative pressure air extraction, introducing nitrogen, stopping heating when the system is recovered to a normal pressure state, and cooling;
(5) adsorption and filtration: transferring the esterification liquid cooled to 70-90 ℃ into a filter, adsorbing and decoloring, and filtering to obtain the qualified triisononyl trimellitate.
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