Narrowly distributed catalyst for fatty acid ethoxylation and preparation method of narrowly distributed catalyst

An ethoxylation and catalyst technology, applied in the field of polymer chemistry, can solve the problems of unsuitable fatty acids, difficult product separation of co-catalysts, long induction period, etc., and achieve the effect of mild catalyst, improved safety and lower requirements

Active Publication Date: 2014-08-13
HUNAN ER KANG PHARMA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By adding polybasic acid, such as oxalic acid, phosphoric acid, citric acid, tartaric acid, etc. as co-catalysts, the problem of long induction period can be overcome, but at the same time it brings new defects: co-catalysts are difficult to separate from the product
However, due to the large difference in the activity of carboxyl and alcoholic hydroxyl groups, this catalyst is still not suitable for the ethoxylation of fatty acids.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Magnesium acetate 20g, potassium hydroxide 10g, barium sulfate 6g

[0024] Proceed as follows:

[0025] (1) Add magnesium acetate and potassium hydroxide into the mortar of the agate grinder, set the time to 30min, and the grinding speed to 250rpm, and start grinding;

[0026] (2) Add micronized barium sulfate in small amounts in small amounts under the grinding state, and continue grinding for 30-60 minutes;

[0027] (3) After grinding, send the obtained solid mixture into an oven, dry at 70°C for 2 hours, and then activate it at 150°C for 2 hours.

Embodiment 2

[0029] Magnesium acetate 20g, potassium hydroxide 40g, barium sulfate 20g, all the other are with embodiment 1.

Embodiment 3

[0031] Magnesium acetate 20g, potassium hydroxide 24g, barium sulfate 18g, all the other are with embodiment 1.

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PUM

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Abstract

The invention discloses a narrowly distributed catalyst for fatty acid ethoxylation and a preparation method of the narrowly distributed catalyst, and in particular relates to a magnesium acetate-potassium hydroxide-barium sulfate solid-phase composite catalyst and the preparation method of the catalyst. Compared with an existing strong basic catalyst, the catalyst, disclosed by the invention, has the advantages that the molecular weight distribution is narrow, the reaction condition is mild, and the catalyzing activity is high.

Description

technical field [0001] The invention relates to a catalyst for fatty acid ethoxylation reaction and a preparation method thereof, and relates to the field of polymer chemistry. Background technique [0002] Fatty acid polyethylene glycol esters are an important class of nonionic surfactants, which have excellent emulsifying power, wettability and dispersibility, and are widely used in daily chemical, pharmaceutical and machinery manufacturing industries. [0003] Fatty acid polyethylene glycol esters can be prepared by polymerizing corresponding fatty acids and ethylene oxide by ethoxylation. In the prior art, the catalysts used to produce polyethylene glycol fatty acid esters are mostly strongly basic catalysts, such as alkali metal hydroxides such as sodium hydroxide and potassium hydroxide. The disadvantages of this type of catalyst are: many side reactions, wide product molecular weight distribution, and too violent reaction. Yuan Haoming and others conducted research ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C07C69/28C07C67/26C08G65/26
Inventor 帅放文王向峰章家伟
Owner HUNAN ER KANG PHARMA
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