Branched-chain long-chain fatty acid base imidazoline extraction agent and preparing method and application thereof

A long-chain fatty acid and imidazoline-based technology, which is applied in the field of branched long-chain fatty acid-based imidazoline extractant and its preparation and application, can solve the problems of short phase separation time, stripping ability, harsh process conditions, and low exchange capacity, etc. problem, to achieve the effect of shortening the phase separation time, strong extraction ability and high catalytic activity

Active Publication Date: 2017-11-24
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of existing extractants such as N235, which have low exchange capacity, long phase separation time, and difficult stripping, the first purpose of the present invention is to provide a long-chain branched structure and rich in amino groups. Imidazoline compound, as an alkaline extractant, has the advantages of large capacity, short phase separation time, and excellent stripping ability
[0006] In view of the disadvantages of harsh process conditions and high cost in the synthesis process of existing imidazoline compounds, another object of the present invention is to provide a method for preparing the branched long-chain compound with simple steps, mild conditions and easy purification and separation. Fatty acid-based imidazoline method

Method used

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  • Branched-chain long-chain fatty acid base imidazoline extraction agent and preparing method and application thereof
  • Branched-chain long-chain fatty acid base imidazoline extraction agent and preparing method and application thereof
  • Branched-chain long-chain fatty acid base imidazoline extraction agent and preparing method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0055] In a 500mL three-necked flask equipped with a stirrer, a reflux condenser, a thermometer, and a water separator, add 1.0 mol of isooctanoic acid, 1.2 mol of diethylenetriamine, and an appropriate amount of nickel oxide solid catalyst. Heat with an oil bath, start the stirrer, carry out heating and reflux stirring reaction at normal pressure, and start timing when the reaction reaches the set temperature. The reaction was carried out at a reaction temperature of 160° C. for 3 hours, 180° C. for 3 hours, and 200° C. for 3 hours. After the reaction is finished, after solid-liquid separation, the excess reaction raw materials are removed by washing and distillation, and the unreacted raw materials are recovered and separated to obtain long-chain fatty acid imidazoline. The yield of the long-chain fatty acid-based imidazoline is 93.2%.

Embodiment 2

[0057] In a 500 mL three-neck flask equipped with a stirrer, a reflux condenser, a thermometer, and a water separator, add 0.5 mol of isohexadecanic acid and 3.0 mol of diethylenetriamine to recover the recovered nickel oxide catalyst. Heat with an oil bath, start the stirrer, carry out heating and reflux stirring reaction at normal pressure, and start timing when the reaction reaches the set temperature. The reaction was carried out at a reaction temperature of 160° C. for 3 hours, 180° C. for 3 hours, and 200° C. for 3 hours. After the reaction is finished, after solid-liquid separation, the excess reaction raw materials are removed by washing and distillation, and the unreacted raw materials are recovered and separated to obtain long-chain fatty acid imidazoline. The yield of the long-chain fatty acid-based imidazoline is 94.3%.

Embodiment 3

[0059] In a 500 mL three-necked flask equipped with a stirrer, reflux condenser, thermometer, and water separator, add 0.5 mol of isostearic acid, 3.0 mol of diethylenetriamine, and an appropriate amount of cobalt oxide catalyst. Heat with an oil bath, start the stirrer, carry out heating and reflux stirring reaction at normal pressure, and start timing when the reaction reaches the set temperature. The reaction was carried out at a reaction temperature of 160° C. for 3 hours, 180° C. for 3 hours, and 200° C. for 3 hours. After the reaction is finished, after solid-liquid separation, the excess reaction raw materials are removed by washing and distillation, and the unreacted raw materials are collected step by step to obtain long-chain fatty acid imidazoline. The yield of the long-chain fatty acid-based imidazoline is 92.6%.

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Abstract

The invention discloses a branched-chain long-chain fatty acid base imidazoline extraction agent and a preparing method and application thereof. The imidazoline extraction agent comprises multiple N atoms and long-branch-chain alkyl groups. The preparing method of the imidazoline extraction agent comprises the steps that in the normal pressure, carboxylic acid and polyethylene polyamine are subjected to the reaction under the action of a solid catalyst, after the reaction is finished, the solid catalyst is recycled through solid-liquid separation, the liquid mixture is distilled, the raw material incompletely reacted is recycled, and then the branched-chain long-chain fatty acid base imidazoline extraction agent is obtained. The preparing method has the beneficial effects that reaction conditions are moderate, the catalyst can be repeatedly used, and equipment investment and operation cost are low; the imidazoline extraction agent is used for extraction negative ions including tungsten, molybdenum and vanadium, the beneficial effects that the extraction volume is high, the phase splitting time is short, and the extraction and reverse extraction performance is excellent; and good industrial application prospects are achieved.

Description

technical field [0001] The invention relates to an imidazoline compound, in particular to a branched long-chain fatty acid-based imidazoline extractant, in particular to a branched long-chain fatty carboxylic acid and polyethylene polyamine as raw materials, which are synthesized in one step by using a solid catalyst. The method for the long-chain fatty acid imidazoline and the application of the branched long-chain fatty acid imidazoline as an extraction agent for anion containing tungsten, molybdenum or vanadium belong to the fields of fine chemical industry and hydrometallurgy. Background technique [0002] Imidazoline surfactants have a history of several decades, and there are many varieties mainly cationic and amphoteric. Imidazoline is an intermediate of imidazoline surface activity. Due to the excellent comprehensive performance of imidazoline surface activity, it has good decontamination, foaming and emulsifying properties, especially with extremely low toxicity, lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/36C07D233/16C22B34/36C22B34/34C22B34/22
CPCC07D233/16C22B34/22C22B34/34C22B34/36C22B3/362Y02P10/20Y02P20/584
Inventor 曹佐英李嘉豪李嘉张贵清肖连生李青刚曾理关文娟
Owner CENT SOUTH UNIV
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