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Method for removing acetic acid and method for producing cyclohexyl acetate and cyclohexanol

A technology of cyclohexyl acetate and cyclohexanol, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, purification/separation of hydrocarbons, etc., can solve problems such as adverse effects of reactions and equipment corrosion, and achieve good ability to capture acetic acid , avoid corrosion, easy to prepare the effect

Active Publication Date: 2021-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] When adopting above-mentioned technological process to prepare cyclohexanol, although the isolated cyclohexane and the isolated cyclohexanol are separated through the separation system, there are still traces (generally tens of ppm) of acetic acid remaining, the existence of these traces of acetic acid, On the one hand, it will cause corrosion of equipment, on the other hand, it will have an adverse effect on subsequent reactions

Method used

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  • Method for removing acetic acid and method for producing cyclohexyl acetate and cyclohexanol
  • Method for removing acetic acid and method for producing cyclohexyl acetate and cyclohexanol
  • Method for removing acetic acid and method for producing cyclohexyl acetate and cyclohexanol

Examples

Experimental program
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Effect test

preparation Embodiment 1

[0132]50kg CA (OH)210kg (with molecular sieve dry base) 5A molecular sieve (purchased from Henan Mingze Environmental Protection Technology Co., Ltd.), 30kg MGCO3And 5kg aluminum sol (purchased from Shandong Chilean Chemical Co., Ltd.), the alumina content is 12% by weight) placed in a disc type granulator (purchased from Shanghai Kezi Chi Chemical Equipment Technology Co., Ltd.), gradually spraying deion Water, making materials into the ball. The resulting sphere (diameter was 3-6 mm) was dried at 120 ° C for 4 h at 600 ° C to obtain a acetic acid capture agent, which consisted in Table 1.

preparation Embodiment 2

[0138]The acetic acid capture agent was prepared using the same method as in the preparation Example 1, and the difference is Ca (OH)2The amount of usage is 77kg.

preparation Embodiment 3

[0148]60kg CaO, 8kg (by molecular sieve dry base) 13X molecular sieve (purchased from Langfang Pengcai Fine Chemical Co., Ltd.), 10kg MG (OH)2And 5kg silica sol (purchased from Zhejiang Yuda Chemical Co., Ltd., a silica content of 25% by weight) placed in a disc type granulator (purchased from Shanghai Kezhen Chemical Equipment Technology Co., Ltd.), gradually spraying deion Water, making materials into the ball. The resulting sphere (a diameter of 3-6 mm) was dried at 140 ° C for 6 h at 520 ° C for 6 h, thereby obtaining a acetic acid capture agent, the composition of the acetic acid capture agent in Table 1.

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Abstract

The invention discloses a method for removing acetic acid. The method comprises contacting cyclohexane and / or cyclohexanol containing acetic acid with an acetic acid trapping agent, and the acetic acid trapping agent contains CaO, MgO, molecular sieves and a binder, The binder is selected from heat-resistant inorganic oxides and clay, based on the total amount of the acetic acid scavenger, the content of CaO is more than 50% by weight, and the content of MgO is more than 5% by weight. The invention also discloses a production method of cyclohexyl acetate and a production method of cyclohexanol by adopting the method to remove trace amounts of acetic acid present in cyclohexane and cyclohexanol. According to the method for removing acetic acid of the present invention, the acetic acid trapping agent that adopts can effectively trap the trace amount of acetic acid that exists in cyclohexane and cyclohexanol, even if it is used at a higher temperature, it also has a good ability to trap acetic acid, Moreover, the acetic acid capture agent can be regenerated by heat treatment, and the regenerated acetic acid capture agent still has a good ability to capture acetic acid.

Description

Technical field[0001]The present invention relates to a method of removing acetic acid, and the present invention also relates to a production method of acetic acid cyclohexyl acetate and a method of producing cyclohexanol, and the present invention further relates to a method of producing cyclohexanone and a caprolactam Production method.Background technique[0002]Cycloheol is an important chemical raw material and solvent. Cycloheol is mainly used for dehydrogenated cyclohexanone, but cyclohexanone is not only the main intermediates of nylon 6 and nylon 66, but also widely used as paint, pesticides, dyes, aviation lubricants, fat, wax, Solvents such as release, deprive, spatial, and the like.[0003]Cyclohydrin can be produced by further hydrogenation of cyclohexyl acetate by ester of cyclohexhene, and preparing a cyclohexhexanol by cyclohexene:[0004](1) Adding a mixture of benzene selectively hydrogened, and the mixture obtained by reacting with benzene is separated to obtain a mixe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/00C07C13/18C07C7/12C07C7/148C07C29/74C07C35/08C07C29/76C07C29/88C07C29/149C07C45/29C07C49/403C07C67/04C07C69/14C07C67/54C07C5/333C07C13/20C07C5/11C07D223/10
CPCC07C5/11C07C5/333C07C7/005C07C7/12C07C7/1485C07C29/149C07C29/74C07C29/76C07C29/88C07C45/29C07C67/04C07C67/54C07C2529/06C07D223/10C07C13/18C07C35/08C07C49/403C07C69/14C07C13/20
Inventor 王振宇谭丽李本高杨克勇
Owner CHINA PETROLEUM & CHEM CORP
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