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Selective preparation method for 1, 3 ,5-tricumene

A tricumene and production method technology, applied in the direction of the addition of unsaturated hydrocarbons and saturated hydrocarbons, etc., can solve the problems of waste, complex production process, and difficulty in continuous production, and achieve simplified production methods and environmental protection. The effect of less pollution

Inactive Publication Date: 2007-10-24
中国石油乌鲁木齐石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] U.S.Pat.No.3,258,607 has reported the production technology that uses active clay as catalyst to prepare 1,3,5-triisopropylbenzene, and this production technology first reacts with benzene and propylene to obtain the content close to 1:1 1,3,5- Triisopropylbenzene and 1,2,4,5-tetraisopropylbenzene, among which 1,2,4,5-tetraisopropylbenzene needs to be subjected to isomerization reaction to obtain 1,3,5-triisopropylbenzene after being separated and purified by crystallization Cumene, the production process reacts in a large excess of propylene, which causes waste and pollution, and has the disadvantages of complex production process and difficulty in continuous production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1, the selective preparation of 1,3,5-triisopropylbenzene production method is carried out according to the following steps: the first step, with cumene as raw material, under the effect of zeolite beta catalyst, in the alkylation reactor In, carry out alkylation reaction with raw material propylene to obtain mixed diisopropylbenzene, wherein, the molar ratio of cumene to propylene is 3:1 or 9:1 or 15:1, and the reaction temperature is 120°C or 180°C or 250℃, the pressure is 0.1Mpa or 2.0Mpa or up to 4.0MPa, the mixing volume space velocity is 3h -1 or 9h -1 or 25h -1 ; In the second step, under the action of zeolite beta catalyst, the mixed dicumene obtained in the first step is alkylated with raw material propylene in the alkylation reactor to obtain 1,3,5-triisopropylbenzene A mixture of propylbenzene, mixed diisopropylbenzene and cumene, wherein the molar ratio of mixed diisopropylbenzene to propylene is 5:1 or 18:1 or 30:1, and the reaction temperature...

Embodiment 2

[0015] Embodiment 2, the difference with embodiment 1 is: in embodiment 2, take benzene as raw material, under the effect of beta zeolite catalyst, in alkylation reactor, carry out alkylation reaction with raw material propylene, obtain Cumene; and this isopropyl benzene and raw material propylene carry out alkylation reaction again, obtain mixed dicumene, wherein, the molar ratio of benzene or isopropyl benzene and propylene is 3:1 or 9:1 or 15:1 .

Embodiment 3

[0016] Example 3, the difference from Example 1 is: using benzene and cumene as raw materials, under the action of a zeolite beta catalyst, in an alkylation reactor, carry out an alkylation reaction with raw material propylene to obtain a mixed Diisopropylbenzene, wherein the molar ratio of benzene and propylbenzene to propylene is 3:1 or 9:1 or 15:1.

[0017] In embodiments 1 to 3: the alkylation reaction is carried out in the same alkylation reactor respectively; or, the alkylation reaction of benzene and propylene, the alkylation reaction of cumene and propylene are all carried out in the first One alkylation reactor is carried out, and the alkylation reaction of mixed dicumyl and propylene is carried out in the second alkylation reactor; Or, the alkylation reaction of benzene and propylene is carried out in the first alkylation reaction The alkylation reaction of cumene and propylene, the alkylation reaction of mixed dicumene and propylene are carried out in the second alk...

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Abstract

A process for selectively preparing 1,3,5-tricumene comprising the steps of, (1) using benzene or / and isopropylbenzene as raw material for alkylation reaction with raw material propylene with the presence of beta zeolite catalyst in alkylation reactor, obtaining mixed di isopropylbenzene, (2) subjecting mixed di isopropylbenzene for alkylation reaction with raw material propylene with the presence of beta zeolite catalyst in alkylation reactor, obtaining 1,3,5 tri isopropylbenzene, mixing the blend of di isopropylbenzene and isopropylbenzene, (3) obtaining 1,3,5 tri isopropylbenzene through conventional distillation segregation of the mixture obtained in the second step.

Description

technical field [0001] The invention relates to a production method of triisopropylbenzene, which is a production method for selectively preparing 1,3,5-triisopropylbenzene. Background technique [0002] 1,3,5-Triisopropylbenzene is an important pharmaceutical and chemical raw material, which can be used as a high-boiling solvent, to prepare K resin, etc.; in addition, it can be used to synthesize lipid regulators, prepare phloroglucinol, etc. in the field of medicine and chemical industry . [0003] 1,3,5-Triisopropylbenzene is mainly prepared from alkylating agent (propylene, 2-halopropane, isopropanol) and benzene under the action of alkylation catalyst. Alkylation catalysts include: sulfuric acid, phosphoric acid, hydrofluoric acid, aluminum trichloride, clay, molecular sieves and amorphous substances, among which aluminum trichloride is used to catalyze benzene and isopropyl chloride to prepare 1,3,5-triisopropyl Benzene works best. Since alu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C15/02C07C15/085C07C2/72
Inventor 葛忠学叶少宁宋新潮张立军刘鸿杨亚敏刘敏周群赵浩英
Owner 中国石油乌鲁木齐石油化工有限公司