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A kind of method of synthesizing ethylene glycol isooctyl ether and polyol ether thereof

A technology of isooctyl ether and ethylene glycol, which is applied in the field of fine chemicals, can solve the problems of slow reaction rate, equipment corrosion, and low monoether selectivity, and achieve the effects of simple method, reduced corrosion, and high catalytic activity

Active Publication Date: 2017-03-29
JIANGSU YIDA CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Ethylene glycol isooctyl ether series polyol ethers are produced by the reaction of ethylene oxide and isooctyl alcohol. Due to the particularity of isooctyl alcohol, it is an alcohol with a relatively large molecular weight. When using traditional base catalysis to synthesize ethylene glycol isooctyl ether The reaction rate of the series polyol ether is slow, the conversion rate is low, and the selectivity of monoether is low, which brings great troubles to industrial purification.
Catalysts such as concentrated sulfuric acid / heteropoly acid corrode the equipment too severely, and the formation of industrial waste is difficult to deal with
Due to its high-efficiency catalytic effect of sulfonate / perchlorate, a large number of industrialized processes of this type of catalyst have been studied, but it still has an impact on the corrosion of equipment, especially perchlorate. Therefore, if high chlorine can be reduced The corrosiveness of acid salts without losing high-efficiency catalytic performance is a problem that the industry needs to solve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The catalyst is prepared according to the following method. Weigh 34.35g of aluminum perchlorate, suspend in 200ml of iso-octanol solution under stirring, and suspend in the solution of 0.0034 g of iron powder, and move the solution into a stirring In the high-pressure reaction kettle, feed nitrogen, control the pressure at 0.1-0.3MP, 90°C-110°C, stir for 4 hours, measure the pH of the solution to be 3.1, and filter out the perchlorate crystals, and the filtrate is set aside. The resulting product was dried in a vacuum oven at 50° C. to obtain the desired catalyst.

Embodiment 2

[0023] The catalyst is prepared according to the following method. Weigh 22.33g of magnesium perchlorate and suspend in 200ml of iso-octanol solution under stirring. Then weigh 0.0022g of iron powder and suspend in the solution. In the high-pressure reaction kettle, feed nitrogen, control the pressure at 0.1-0.3MP, 90°C-110°C, stir for 4 hours, measure the pH of the solution to 4.8, and filter out the perchlorate crystals, and the filtrate is set aside. The resulting product was dried in a vacuum oven at 50° C. to obtain the desired catalyst.

Embodiment 3

[0025] Catalyst is prepared according to the following method, weigh 14.05g of sodium perchlorate, suspend in 200ml of iso-octanol solution under agitation, weigh 0.0014g of iron powder and suspend in the same solution, move this solution into the In the high-pressure reaction kettle, feed nitrogen, control the pressure at 0.1-0.3MP, 90°C-110°C, stir for 4 hours, measure the pH of the solution to be 5.6, and filter out the perchlorate crystals, and the filtrate is set aside. The resulting product was dried in a vacuum oven at 50° C. to obtain the desired catalyst.

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PUM

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Abstract

The invention relates to a method for synthesizing iso-octyl ether glycol and polyol ether of iso-octyl ether glycol. The method comprises the steps of adding isooctanol and a catalyst into a reaction kettle, stirring after closing, simultaneously heating to a set reaction temperature, stopping heating, controlling the reaction pressure at 0.1MPa-0.5MPa, continuously introducing ethylene oxide into the reaction kettle according to the proportion, after ethylene oxide is introduced, preserving the temperature until the temperature in the reaction kettle is not increased and the pressure in the reaction kettle is not decreased, introducing cooling water to cool, and directly discharging the material into a rectifying system, so as to obtain products, wherein the molar ratio of isooctanol to ethylene oxide is (5-1) to 1, and the catalyst is perchlorate modified by trace iron powder or copper powder. The method has the beneficial effects that the process is simple, the equipment investment is low, the energy consumption and the material consumption are low, the conversion rate of EO is high, the environmental protection property is good, and the corrosion of perchlorate on equipment is reduced.

Description

technical field [0001] The invention relates to a method for synthesizing ethylene glycol isooctyl ether and polyol ether thereof. It belongs to the technical field of fine chemicals. Background technique [0002] Ethylene glycol isooctyl ether is mainly used as a solvent for paints, printing inks, etc., and as a film-forming aid for water-based paints. Diethylene glycol isooctyl ether can be used in electronic chemicals, as surfactants, plastic additives, rubber additives agent etc. [0003] Ethylene glycol isooctyl ether series polyol ethers are produced by the reaction of ethylene oxide and isooctyl alcohol. Due to the particularity of isooctyl alcohol, it is an alcohol with a relatively large molecular weight. When using traditional base catalysis to synthesize ethylene glycol isooctyl ether The reaction rate of the series polyol ether is slow, the conversion rate is low, and the selectivity of monoether is low, which brings great troubles to industrial purification. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C41/03C07C41/42C07C43/11C07C43/13B01J27/128B01J27/06
CPCB01J27/06B01J27/128C07C41/03C07C41/42C07C43/11C07C43/13
Inventor 张虎孙洁戴祖红刘准曹惠庆束成洵
Owner JIANGSU YIDA CHEM