Method for preparing long chain fatty acid polyamide based on catalysis of calcium oxide

A fatty amide polyamide, catalytic preparation technology, applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylic acid amides, etc., can solve the problems of increasing process difficulty and processing cost, and achieves reduced process difficulty, low solubility, High catalytic activity

Inactive Publication Date: 2011-05-18
XI'AN PETROLEUM UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] A strong base can be used as a catalyst to improve the conversion rate of method 3. Commonly used catalysts include sodium hydroxide, potassium hydroxide and sodium methoxide, etc., but this type of catalyst can dissolve in the reactants and products during the reaction, and it is difficult to pass the simple method after the reaction. method to remove, increasing the process difficulty and processing cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing long-chain fatty amides based on calcium oxide catalysis, comprising the following steps:

[0018] In the first step, natural oil and 3 times the volume of organic solvent are added to the reaction vessel. The natural oil is soybean oil after deacidification and dehydration, and the organic solvent is n-hexane.

[0019] In the second step, polyethylene polyamine is added dropwise to the container, the molar ratio of the amine groups contained in polyethylene polyamine to the ester group in natural oil is 1.1: 1, polyethylene polyamine is ethylenediamine,

[0020] The 3rd step, add the particle size of 10% grease mass in the container under stirring and be 80-100 order calcium oxide powder,

[0021] The fourth step is to stir and heat the reactants in the container at 65°C for 2 hours, then cool to room temperature,

[0022] The 5th step, the reactant in the container is filtered with 4# sand core funnel, washes to filter residue colorless with th...

Embodiment 2

[0025] A method for preparing long-chain fatty amides based on calcium oxide catalysis, comprising the following steps:

[0026] In the first step, natural oil and 5 times the volume of organic solvent are added to the reaction vessel. The natural oil is rapeseed oil after deacidification and dehydration, and the organic solvent is cyclohexane.

[0027] In the second step, polyethylene polyamine is added dropwise to the container, the molar ratio of the amine groups contained in polyethylene polyamine to the ester group in natural oil is 1: 1, polyethylene polyamine is diethylene triamine,

[0028] The 3rd step, add the particle size of 10% grease mass in the container under stirring and be 160-200 order calcium oxide powder,

[0029] The fourth step is to stir and heat the reactants in the container at 80°C for 2 hours, then cool to room temperature,

[0030] The 5th step, the reactant in the container is filtered with 1# sand core funnel, washes to filter residue colorless ...

Embodiment 3

[0033] A method for preparing long-chain fatty amides based on calcium oxide catalysis, comprising the following steps:

[0034] In the first step, natural oil and 4 times the volume of organic solvent are added to the reaction vessel. The natural oil is cottonseed oil after deacidification and dehydration, and the organic solvent is toluene.

[0035] In the second step, polyethylene polyamine is added dropwise to the container, the molar ratio of the amine groups contained in polyethylene polyamine to the ester group in natural oil is 1: 1, polyethylene polyamine is triethylenetetramine,

[0036] The 3rd step, add the particle size of 20% grease quality in the container under stirring and be 40-80 order calcium oxide powder,

[0037] The fourth step is to stir and heat the reactants in the container at 100°C for 3 hours, then cool to room temperature,

[0038] In the 5th step, the reactant in the container is filtered with a 5# sand core funnel, washed with the organic solve...

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Abstract

The invention relates to a method for preparing long chain fatty acid polyamide based on catalysis of calcium oxide, comprising the steps of adding natural oil and organic solvent into a reaction vessel firstly; dropwise adding polyethylene polyamine into the vessel; then adding calcium oxide powder into the vessel while stirring; heating reactant in the vessel; cooling the reactant to room temperature, then filtering the reactant in the container, washing, so as to obtain filtrate; and removing organic solvent in the filtrate by steaming, so as to obtain light yellow waxy solids, namely the long chain fatty acid polyamide. The catalyst in the invention can be easily removed after reaction, thus reducing process difficulty and processing cost and the method has the advantages of being efficient, simple and convenient.

Description

technical field [0001] The invention relates to the technical field of preparation of long-chain fatty amides, in particular to a method for preparing long-chain fatty amides based on calcium oxide catalysis. Background technique [0002] Long-chain fatty acid amides synthesized from long-chain fatty acids and polyamines are important chemical raw materials. Amines are intermediates for the preparation of imidazoline corrosion inhibitors. At the same time, this type of long-chain fatty amides also has surface activity. And lubricating properties, can be used in the field of daily necessities and industrial additives. In addition, fatty amides can also prepare various types of surfactants through reactions such as phosphation, sulfation, ethoxylation, sulfonation, and succinylation. At present, there are mainly three methods for the synthesis of long-chain fatty amides at home and abroad: 1. Preparation by dehydration reaction of fatty acid and polyethylene polyamine at 150...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C231/02C07C233/36
Inventor 汤颖路勇何鸣元张洁徐敬芳陈刚
Owner XI'AN PETROLEUM UNIVERSITY
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