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Solid catalyst for hydration of epoxy compound to prepare diol and its application

A solid catalyst, epoxy compound technology, applied in the direction of organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, hydrolysis preparation, etc., can solve the problem of poor EG selectivity, long process flow, high energy consumption, etc. problem, to achieve the effect of preventing influence, good technical effect and low reaction temperature

Inactive Publication Date: 2012-09-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many problems in the process route as follows: 1. Long process flow; 2. High equipment investment; 3. Large energy consumption; 4. High molar ratio of water to EO (hereinafter referred to as water ratio, usually 20-25); 5. High production cost; 6. Poor EG selectivity
Although a lot of work has been done on the catalytic hydration of epoxy compounds, there are some problems in the efficiency of the catalyst, the method of catalyst preparation and the stability of the catalyst.

Method used

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  • Solid catalyst for hydration of epoxy compound to prepare diol and its application
  • Solid catalyst for hydration of epoxy compound to prepare diol and its application
  • Solid catalyst for hydration of epoxy compound to prepare diol and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation of catalyst in the present invention.

[0032] 0.05 g of Co(salen)-COOCH with cyclohexanediamine skeleton 3 1g of the cage-type pore material FDU-12 was uniformly dispersed in 5mL of dichloromethane, refluxed for 12 hours, cooled, and the solvent was drained, then 2mL of n-hexane, 1mL of pyridine and 10mmol of trimethoxypropylsilane were added and stirred. Reflux for 12h, cool, filter and wash, and dry to obtain catalyst A, whose infrared and ultraviolet characterizations are shown in the attached figure 1 and 2 .

Embodiment 2

[0034] Co(salen)-COOCH using 0.10 g of cyclohexanediamine skeleton 3 , all the other operating steps are the same as embodiment 1, called catalyst B.

Embodiment 3

[0036] Co(salen)-COOCH using 0.15 g of cyclohexanediamine skeleton 3 , and all the other operating steps are the same as in Example 1, called catalyst C.

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Abstract

The invention particularly relates to a solid catalyst formed by assembling a racemic Co (salen) metal complex in a nano-reactor and used for the hydration reaction of an epoxy compound to prepare diol. The expression formula of the catalyst is: Co (salen) n / R, wherein R is a nano-reactor with a cage-type pore structure and Co (salen) is a racemic metal complex. A general molecular formula is shown as the following. And n represents the mass percent content of Co in the solid catalyst and ranges from 0. 1% to 1%. The catalyst can be used for a reaction of efficient catalysis of the hydration of an epoxy compound to prepare diol. The catalyst of the invention is characterized by simple preparation method, good reproducibility and easy recycling, thus being able to be used for industrial production.

Description

[0001] technical field [0002] The invention relates to hydration of epoxy compounds to prepare ethylene glycol, 1,2-propanediol and other diols, in particular to a catalyst for hydration of epoxy compounds and its application. Background technique [0003] Ethylene glycol (EG) is an important chemical raw material, which is widely used in the production of polyester fiber, automobile antifreeze, thawing fluid, etc. At present, the production of EG at home and abroad adopts the process route of direct hydration of ethylene oxide (EO). However, there are many problems in the process route as follows: 1. Long process flow; 2. High equipment investment; 3. Large energy consumption; 4. High molar ratio of water to EO (hereinafter referred to as water ratio, usually 20-25); 5. High production cost; 6, EG selectivity is poor. In order to solve the above problems, the catalytic hydration of EO has attracted attention. Although different catalyst systems have been developed,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01J31/40C07C31/20C07C31/42C07C33/26C07C31/27C07C29/10
CPCY02P20/52Y02P20/584
Inventor 李灿杨启华李博肖兵
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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