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A method for purifying organic amines

An organic amine and ion exchange technology, which is applied in chemical instruments and methods, separation methods, adsorption water/sewage treatment, etc., can solve the problems of difficult engineering, incomplete ion exchange purification, high energy consumption of distillation technology, etc., to achieve Strong pertinence, reduced operating costs, and strong flexibility

Active Publication Date: 2019-03-15
BEIJING SIJIANTONG TECH&DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects of high energy consumption of extraction, extraction and distillation in the purification process of organic amines in the prior art, high difficulty in engineering and incomplete ion exchange purification by electrochemical methods, and provide a A new method for purifying organic amines. This method can not only remove the impurity cations that affect the recycling process of organic amines through cation exchange and / or adsorption, but also effectively remove the cations in organic amines. Solid particles, amine degradation products and anions, restore the performance of organic amines

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment approach

[0023] According to a preferred embodiment of the present invention, the method for purifying organic amines further includes: when at least one of the filter adsorption medium, anion exchange medium and cation exchange medium in the bed reaches saturation, regenerate it and then use it again. The regeneration method can be a conventional choice in the art, for example, can be selected from at least one of thermal regeneration method, washing method and ion exchange method. Wherein, when the regeneration method is a thermal regeneration method, the regeneration conditions generally include: the regeneration temperature can be 50-600°C, preferably 150-300°C; the regeneration medium can be hot air, hot nitrogen, At least one of hot oxygen, hot acid gas and hot water vapor; the volumetric space velocity of the regeneration medium can be 0.05-15h -1 , preferably 0.1-5h -1 . When the regeneration method is washing and / or ion exchange, the regeneration conditions generally includ...

Embodiment 1

[0027] This example is used to illustrate the method for purifying organic amines provided by the present invention.

[0028] The composition of organic amine solution to be purified: N-methyldiethanolamine content 35% by weight, K + Content 0.37% by weight, Na + Content 0.59% by weight, Cl - Content 0.7 wt%, SO 4 2- Content 0.49% by weight, TEA + (tetraethylammonium cation) content 0.256% by weight, CH 3 COO - Content 0.26% by weight, HCOO - The content is 0.12% by weight, and the rest is water.

[0029] The steps of purifying the organic amine solution are as follows:

[0030] (1) Fill 300ml of styrene-based strongly basic anion-exchange resin (model 201×7, mass total exchange capacity of 3.6mol / kg) into a resin column whose height-to-diameter ratio is 3, called column 1;

[0031] (2) 500ml HY molecular sieve pellets (containing HY molecular sieve 60% by weight, containing kaolin 40% by weight, wherein, HY molecular sieve is a cation exchange medium, and kaolin is a...

Embodiment 2

[0037] This example is used to illustrate the method for purifying organic amines provided by the present invention.

[0038] The composition of the organic amine solution to be purified is as in Example 1.

[0039] The steps of purifying the organic amine solution are as follows:

[0040] (1) Fill 300ml of styrene-based strongly basic anion-exchange resin (model 201×7, mass total exchange capacity of 3.6mol / kg) into a resin column whose height-to-diameter ratio is 3, called column 1;

[0041] (2) Fill 500ml of styrene-based strongly acidic cation exchange resin (model 001×7, with a total mass exchange capacity of 4.6mol / kg) in a resin column with a height-to-diameter ratio of 3, called column 2;

[0042] (3) Take 700ml of the above-mentioned organic amine solution to be purified at a volume space velocity of 1.2h -1 The flow rate continuously flows through column 1 and column 2, and the temperature of both column 1 and column 2 is controlled at 40°C for processing.

[0043...

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Abstract

The present invention relates to the field of organic amine purification, and provides an organic amine purification method, which comprises that organic amine to be purified flows through one or a plurality of bed layers, wherein the bed layer is selectively provided with a filtration adsorption medium and / or anion exchange medium so as to selectively perform filtration adsorption and / or anion exchange on the organic amine to be purified, and at least a cation exchange medium is further arranged in the bed layer so as to perform cation exchange on the organic amine to be purified. With the application of the method of the present invention to purify the organic amine, the impurities in the organic amine can be effectively removed, the organic amine cannot be substantially affected, and the impurities can be effectively removed on the basis of substantially no loss of the organic amine.

Description

technical field [0001] The invention relates to a method for purifying organic amines. Background technique [0002] Organic amines have been widely used in biology, medicine, catalysis, chemical industry, daily chemical, environmental protection and other industries. The application of a large number of organic amines has led to a large amount of organic amine wastewater discharge. Organic amines usually have a strong odor and cause serious environmental pollution, affecting human health. They usually require special chemical or biological treatment before they can be discharged. In addition, organic amine wastewater often contains other impurities, and a large amount of chemicals and energy are consumed in the treatment process, resulting in a waste of resources. [0003] The content of organic amines in the organic amine wastewater produced by different processes is different. For example, in the molecular sieve synthesis process, the synthetic mother liquor discharged c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D15/04B01D15/00C02F1/28C02F1/42
Inventor 李云龙童扬传朱纯峰周跃赵志山
Owner BEIJING SIJIANTONG TECH&DEV
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