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Method for preparing alkoxy compound by oxyalkylation

An alkoxy compound and alkoxylation technology, which is applied in the preparation of amino compounds from amines, the preparation of organic compounds, and the preparation of ethers from alkylene oxides. And other issues

Inactive Publication Date: 2005-08-17
SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing alkoxylation catalysts capable of preparing narrowly distributed alkoxylates have a common disadvantage of poor compatibility with alkoxylates, resulting in cloudy product appearance
In addition, the chemical properties of these catalysts are quite different from those of alkoxy compounds, which also affects the performance of the product to some extent.

Method used

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  • Method for preparing alkoxy compound by oxyalkylation
  • Method for preparing alkoxy compound by oxyalkylation
  • Method for preparing alkoxy compound by oxyalkylation

Examples

Experimental program
Comparison scheme
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Embodiment 1～8

[0024] Add 200g of alcohol ether carboxylic acid into the flask, add 100g of water and 100g of isopropanol, stir and heat to 90°C, then add an equivalent mole of calcium oxide or magnesium oxide powder (calculated from the acid value of alcohol ether carboxylic acid) Gradually add it to the flask, and after fully reacting, remove the water and solvent by rectification to obtain the catalyst.

[0025] 600g C 12 ~C 14 Add mixed alcohol and 20g of catalyst into a 2-liter high-pressure reactor, replace with nitrogen to remove oxygen, raise the temperature to 100-120°C, vacuumize for 0.5-1 hour, then raise the temperature to 160°C, and pass 30g of propylene oxide to carry out Initiate the reaction. After initiating the reaction, continuously add a total amount of 380 g of propylene oxide (the equivalent required for the reaction) to the reactor, and keep the system pressure at 0.2 to 0.4 MPa during the addition. After the reaction is completed, it is aged for 20 minutes, cooled t...

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PUM

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Abstract

The method for preparing alkoxyl compound by utilizing alkoxylation reaction in the presence of catalyst is characterized by that it uses the compound containing reactive hydrogen and epoxypropane as raw material, its reaction temp. is 100-220 deg.C, and reaction pressure is 0.1-0.6 MPa, and said catalyst has the following structure: [RO(CH2CH2O)nCH2COO]2-M, in which R is alkyl group or alkenyl group of C2-C30, n=1-16, M is Ca or Mg. The dose of catalyst is the weight ratio of compound containing reactive hydrogen and catalyst which is equal to 100:0.3-8.

Description

technical field [0001] The present invention relates to a process for the preparation of alkoxylates by alkoxylation. Background technique [0002] Alkoxylates are an important class of compounds, such as alkoxylates of alcohols, alkoxylates of carboxylic acids, alkoxylates of amines, etc. Most of the alkoxylates can be used as nonionic surfactants, which are widely used in washing, textile printing and dyeing, pesticides, industrial cleaning and other industries. In addition, it can also be used as an intermediate to prepare various other anionic surfactants through sulfonation, phosphorylation, etc. Alkoxy compounds can usually be prepared by the addition reaction of active hydrogen-containing compounds and propylene oxide in the presence of a catalyst, and the products are mixtures with different degrees of polymerization. At present, the commonly used catalysts in industry are basic catalysts, such as KOH, NaOH and sodium methoxide. The alkoxylation reaction with a st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07B41/04C07C41/02C07C51/367C07C209/68C08G65/02
Inventor 张少钢王忠凯范进
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD
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