A kind of concentration process for preparing fatty alcohol ether carboxylic acid from fatty alcohol ether carboxylate

A technology of alcohol ether carboxylate and alcohol ether carboxylic acid, which is applied in the direction of carboxylate preparation, carboxylate preparation, carboxylate preparation, etc. It can solve the problems of unfavorable large-scale industrial production, low operating efficiency, and high concentration cost. problems, to achieve good dehydration effect, safety, low energy consumption, and low operating costs

Active Publication Date: 2020-09-18
SHANGHAI FINE CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patented filter area is small, the operating efficiency is low, and the concentration cost is high, which is not conducive to large-scale industrial production

Method used

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  • A kind of concentration process for preparing fatty alcohol ether carboxylic acid from fatty alcohol ether carboxylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In a 1L autoclave, according to the molar ratio of feed alcohol ether and sodium hydroxide of 1:1, the concentration of alcohol ether dissolved in deionized water is 20% (80 / (320+80)=20%), add 0.13 mol 80g AEO9 alcohol ether (9 dodecyl fatty alcohol ether with EO number, purchased from BASF China Co., Ltd.) and 320g deionized water, add 0.13mol 5.2g sodium hydroxide, turn on the stirring, the stirring speed is 100rpm, heat up to 80℃ to make it dissolve evenly. Under the condition of 80℃, add 14g palladium-carbon composite catalyst to pass in oxygen and replace it twice. The oxygen is industrial oxygen, the content is> 99%, under the condition of stirring speed of 200rpm, keep the system oxygen pressure at an absolute pressure of 0.11MPa, adopt intermittent or continuous oxygen feeding method to maintain a constant oxygen pressure, turn on the oxygen circulation pump, react until the oxygen pressure no longer changes, adopt circulation The pump realizes the circulation of ...

Embodiment 2

[0042] In a 1L autoclave, according to the molar ratio of feed alcohol ether and sodium hydroxide of 1:1.08, the concentration of alcohol ether dissolved in deionized water is 5%, add 0.065mol 30g AEO7 alcohol ether (7 EO number Dodecyl fatty alcohol ether, purchased from BASF China Co., Ltd.) and 570g of deionized water, add 0.07mol 2.8g of sodium hydroxide, turn on the stirring, the stirring speed is 200rpm, and the temperature is raised to 70℃ to make it uniformly dissolved. Under the condition of 70℃, add 90g platinum-carbon composite catalyst, pass in oxygen and replace twice, the oxygen is industrial oxygen, the content is> 99%, under the condition of stirring speed of 400rpm, keep the system oxygen pressure at an absolute pressure of 0.2MPa, adopt intermittent or continuous oxygen feeding method to maintain a constant oxygen pressure, turn on the oxygen circulation pump, and react until the oxygen pressure no longer changes, adopt circulation The pump realizes the circula...

Embodiment 3

[0052] In a 1L autoclave, according to the molar ratio of feed alcohol ether and sodium hydroxide of 1:1, the concentration of alcohol ether dissolved in deionized water is 40% (80 / (120+80)=40%), add 0.13 mol 80g XP90 alcohol ether (9 EO decaalkyl fatty alcohol ether, purchased from BASF China Youxiang Company) and 120g deionized water, add 0.13mol 5.2g sodium hydroxide, turn on the stirring, the stirring speed is 100rpm, heat up to 80℃ to make it dissolve evenly. Under the condition of 80℃, add 14g palladium-carbon composite catalyst to pass in oxygen and replace it twice. The oxygen is industrial oxygen, the content is> 99%, under the condition of stirring speed of 200rpm, keep the system oxygen pressure at an absolute pressure of 0.11MPa, adopt intermittent or continuous oxygen feeding method to maintain a constant oxygen pressure, turn on the oxygen circulation pump, react until the oxygen pressure no longer changes, adopt circulation The pump realizes the circulation of oxy...

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Abstract

The invention discloses a concentration process for preparing fatty alcohol ether carboxylic acid from fatty alcohol ether carboxylate: in acidification reactor, add fatty alcohol ether carboxylate and acid prepared by oxidation method, acidification reaction occurs to generate acid form Fatty alcohol ether carboxylate, obtains the liquid phase product; In the layering equipment, the liquid phase product obtained in the previous step is left to stand for stratification, and the material that has been layered enters the next step; in the liquid-liquid separation equipment, the The material separated from the standing stratification obtained in the previous step obtains the lower aqueous phase and the upper layer material, and the upper layer material obtained after separation is concentrated to obtain the concentrated material; in the solid-liquid separation equipment, the concentrated material obtained in the previous step is subjected to solid-liquid separation. Liquid separation, the obtained solid phase material is used for recovery, and the obtained liquid phase material is once concentrated as the product. The invention not only has simple technological process and low operating cost, but also has safe and reliable process, high resource utilization and low energy consumption, and is a clean production process meeting the development requirements of green chemical industry.

Description

Technical field [0001] The invention belongs to the technical field of fine chemicals, and particularly relates to a concentration process for preparing fatty alcohol ether carboxylic acids from fatty alcohol ether carboxylates, and specifically, to a fatty alcohol ether carboxylic acid prepared by an oxidation method that is hydrochlorized to prepare fatty alcohols Concentration process of ether carboxylic acid, especially fatty alcohol ether carboxylate prepared by noble metal catalytic oxidation method, and acidification and concentration of low-concentration products. Background technique [0002] The fatty alcohol ether carboxylate (AEC) series products are a new type of surfactants with dual anionic and non-ionic properties. They belong to the three major green surfactants in the 1990s. They have mildness, safety in use, and easy biodegradation. All-in-one, it is currently recognized as a functional new product with a wide range of applications. It can be used as a good det...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/02C07C51/41C07C51/215C07C59/125B01F17/44C09K23/44
CPCC07C51/02C07C51/215C07C51/41C09K23/00
Inventor 张威徐福利王丰收张高飞陶源汪传新刘兵司丽丽武先东董庆文董万田
Owner SHANGHAI FINE CHEM CO LTD
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