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Method for removing acetic acid, production method for cyclohexyl acetate, and production method for 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 , to avoid corrosion, the effect of a wide range of raw material sources

Active Publication Date: 2018-05-11
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, production method for cyclohexyl acetate, and production method for cyclohexanol
  • Method for removing acetic acid, production method for cyclohexyl acetate, and production method for cyclohexanol
  • Method for removing acetic acid, production method for cyclohexyl acetate, and production method for cyclohexanol

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Experimental program
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Effect test

preparation Embodiment 1

[0132] 50kg Ca(OH) 2 , 10kg (based on the dry basis of molecular sieve) 5A molecular sieve (purchased from Henan Mingze Environmental Protection Technology Co., Ltd.), 30kg MgCO 3 And 5kg aluminum sol (purchased from Shandong Zhilida Chemical Co., Ltd., the alumina content is 12% by weight) is placed in the disc granulator (purchased from Shanghai Keruichi Chemical Equipment Technology Co., Ltd.), gradually spraying deionized water to make the material gradually into a ball. The obtained spheres (3-6 mm in diameter) were dried at 120° C. for 8 h, and then calcined at 600° C. in an air atmosphere for 4 h to obtain an acetic acid scavenger whose composition is listed in Table 1.

preparation Embodiment 2

[0138] The acetic acid scavenger is prepared in the same manner as in Preparation Example 1, except that Ca(OH) 2 The dosage is 77kg.

preparation Embodiment 3

[0148] With 60kg CaO, 8kg (based on the dry basis of molecular sieve) 13X molecular sieve (purchased from Langfang Pengcai Fine Chemical Co., Ltd.), 10kg Mg(OH) 2 And 5kg silica sol (purchased from Zhejiang Yuda Chemical Co., Ltd., silicon dioxide content is 25% by weight) is placed in the disc granulator (purchased from Shanghai Keruichi Chemical Equipment Technology Co., Ltd.), gradually spraying deionized water to make the material gradually into a ball. The obtained spheres (3-6 mm in diameter) were dried at 140° C. for 6 h, and then calcined at 520° C. in an air atmosphere for 6 h to obtain an acetic acid scavenger. The composition of the acetic acid scavenger is listed in Table 1.

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Abstract

The invention discloses a method for removing acetic acid. The method comprises a step of contacting cyclohexane and / or cyclohexanol containing acetic acid with an acetic acid capturing agent, whereinthe acetic acid capturing agent contains CaO, MgO, a molecular sieve and a binder, the binder is selected from a group consisting of heatproof inorganic oxide and clay, and on the basis of the totalamount of the acetic acid capturing agent, the contents of CaO and MgO are 50 wt% or above and 5 wt% or above, respectively. The invention also discloses production methods for cyclohexyl acetate andcyclohexanol, wherein the production methods adopt the acetic acid removal method for removing trace acetic acid in cyclohexane and cyclohexanol. According to the acetic acid removal method, the acetic acid capturing agent can effectively capture trace acetic acid in cyclohexane and cyclohexanol and has good acetic acid capturing capability even at a high temperature; and the acetic acid capturingagent can be regenerated through heating treatment, and the regenerated acetic acid capturing agent still has good acetic acid capturing capability.

Description

technical field [0001] The present invention relates to a method for removing acetic acid. The present invention also relates to a production method of cyclohexyl acetate and a production method of cyclohexanol. The present invention further relates to a production method of cyclohexanone and a kind of caprolactam production method. Background technique [0002] Cyclohexanol is an important chemical raw material and solvent. Cyclohexanol is mainly used for dehydrogenation of cyclohexanone, and cyclohexanone is not only the main intermediate for the further production of nylon 6 and nylon 66, but also widely used in paints, pesticides, dyes, aviation lubricants, grease, wax, Solvent for film removal, decontamination, spot removal, etc. [0003] Cyclohexanol can be produced by esterifying cyclohexene to produce cyclohexyl acetate, and further hydrogenating cyclohexyl acetate. The typical process for preparing cyclohexanol from cyclohexene is: [0004] (1) Benzene is selecti...

Claims

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Application Information

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Patent Type & Authority Applications(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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