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A kind of waste treatment method of stearoyl chloride

A technology of waste treatment and stearyl chloride, which is applied in chemical instruments and methods, preparation of organic compounds, preparation of carboxylate, etc., can solve the problems of large amount of activated carbon powder, high labor intensity of personnel, and difficulty in solid waste treatment, and achieves The effect of reducing waste, reducing reaction time, and reducing time for rectification and waste gas treatment

Active Publication Date: 2017-03-22
ANHUI GUANGXIN AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The acid chloride obtained by this method has high chroma, poor product quality, high labor intensity and poor operating environment
The amount of activated carbon powder added during the treatment process is large, the production cost is high, and solid waste treatment is difficult

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Firstly, the crude stearyl chloride is heated to 105°C for later use, which can facilitate the adsorption of impurities by activated carbon in the later stage;

[0021] Secondly, add activated carbon adsorbent to the crude stearyl chloride heated to 105°C to adsorb impurities at the above temperature, such as tar substances. It is easier to generate more tar substances, so activated carbon can separate the tar substances in the crude hard acyl chloride;

[0022] Cool the liquid after the above-mentioned activated carbon adsorption once again, and cool the temperature to 80°C, then filter, and after the rapid cooling, the activated carbon adsorbed with tar substances can be filtered and separated;

[0023] Next, the above-mentioned filtered residue is evaporated at a high temperature, and the temperature during evaporation is 158 ° C, the time is 40 minutes, and the pressure is 0.35 MPa, wherein the tar material can be catalyzed into steam and separated from the activate...

Embodiment 2

[0029] Firstly, the crude stearyl chloride is heated to 75°C for later use, which can facilitate the adsorption of impurities by activated carbon in the later stage;

[0030] Secondly, add activated carbon adsorbent to the crude stearyl chloride heated to 75°C to adsorb impurities at the above temperature, such as tar substances. It is easier to generate more tar substances, so activated carbon can separate the tar substances in the crude hard acyl chloride;

[0031] Cool the liquid after the above-mentioned activated carbon adsorption once again, and the temperature is cooled to 75°C, and then filter, and after rapid cooling, the activated carbon adsorbed with tar substances can be filtered and separated;

[0032] Next, the above-mentioned filtered residue is evaporated at high temperature, and the temperature during evaporation is 155°C, the time is 45 minutes, and the pressure is 0.15MPa, wherein the tar material can be catalyzed into steam and separated from the activated ...

Embodiment 3

[0038] First, heat the crude stearyl chloride to 85°C for later use, which can facilitate the adsorption of impurities by activated carbon in the later stage;

[0039] Secondly, add activated carbon adsorbent to the crude stearyl chloride heated to 85°C to absorb impurities at the above temperature, such as tar substances. It is easier to generate more tar substances, so activated carbon can separate the tar substances in the crude hard acyl chloride;

[0040] Once again, the aforementioned activated carbon adsorbed liquid is cooled once again, and the temperature is cooled to 73°C, and then filtered. After rapid cooling, the activated carbon adsorbed with tar substances can be filtered and separated;

[0041] Next, the above-mentioned filtered residue is evaporated at high temperature, and the temperature during evaporation is 165°C, the time is 30 minutes, and the pressure is 0.45MPa, wherein the tar material can be catalyzed into steam and separated from the activated carbo...

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PUM

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Abstract

The invention provides a stearoyl chloride waste material treating method. The method comprises the following steps that firstly, coarse stearoyl chloride is heated; secondly, an activated carbon adsorbent is added in the coarse stearoyl chloride; thirdly, primary cooling is performed on liquid obtained after activated carbon adsorption; fourthly, high-temperature evaporation is performed on residues obtained through filtration; fifthly, gas generated through evaporation is collected, and then secondary cooling is performed on the gas; sixthly, the materials processed through secondary cooling are sent into a dryer and a sprayer to be dried; lastly, the dried materials are introduced into a concentrator to be concentrated, collecting is performed, and then further treating is performed. According to the stearoyl chloride waste material treating method, by adopting the production technology, tar substances in the coarse stearoyl chloride can be thoroughly separated; meanwhile, a side reaction can be prevented from being further generated to influence the purity of stearoyl chloride when the coarse stearoyl chloride is separated again at the certain temperature and time under the certain pressure.

Description

technical field [0001] The invention relates to the field of plastic fine chemical production, in particular to a stearoyl chloride waste treatment method. Background technique [0002] Stearoyl acid chloride (Stearoyl acid chloride, also known as octadecanoyl chloride) is a pesticide intermediate and also a raw material for the production of neutral sizing agent for papermaking——alkyl ketone dimer (AKD). Under the catalysis of the catalyst dimethylformamide (DMF), it reacts with phosgene to form an acylated product. The reaction is mainly divided into two stages: [0003] 1. Catalyst activation stage [0004] Phosgene reacts with dimethylformamide to generate active group (1), which is very unstable and releases a molecule of CO very quickly. 2 , and generate an active group (2); [0005] 2. The active group (2) reacts with stearic acid to generate stearyl chloride, regenerates dimethylformamide, and releases a molecule of HCl at the same time; [0006] At present, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C51/64C07C53/42
CPCC07C51/64C07C53/42
Inventor 过学军胡安胜吴建平高焰兵戴玉婷张军刘长庆徐小兵黄显超朱张
Owner ANHUI GUANGXIN AGROCHEM
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