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A kind of dechlorination method of carbon five solvent

A solvent and dechlorination technology, applied in the direction of distillation purification/separation, etc., can solve the problems of poor dechlorination effect and decreased dechlorination effect, and achieve low equipment cost, better removal effect, and high chlorine removal rate.

Active Publication Date: 2021-06-22
PUYANG BINDER CHEM CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dechlorination agent of the invention has a better dechlorination effect on chlorine-containing materials with a chlorine content of 50-200 μg / g, but when the chlorine content continues to increase, the dechlorination effect decreases seriously, and for chlorine content higher than 1000 mg / kg of chlorine-containing materials, the dechlorination effect is poor, generally lower than 45%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-11

[0034] In the 500mL two-necked flask that condenser pipe, agitator are housed, add respectively chlorinated carbon five solvents (chlorine content n 0 mg / kg) 100g, naphthalene a g, paraformaldehyde b g, acetic acid c g, tetraethylammonium bromide d g. Stir at 60°C for 10h. After the reaction, the reaction solution was distilled to collect the solvent. Determination of the chlorine content in the solvent, denoted as n 1mg / kg, calculate the chlorine removal rate (%).

Embodiment 12-20

[0046] In the 500mL two-necked flask that condenser pipe, agitator are housed, add respectively chlorinated carbon five solvents (chlorine content n 0 mg / kg) 100g, naphthalene 32g, paraformaldehyde 14g, acetic acid 10g, quaternary ammonium salt 0.8g. Stir at 60°C for 10h. After the reaction, the reaction solution was distilled to collect the solvent. Determination of the chlorine content in the solvent, denoted as n 1 mg / kg, calculate the chlorine removal rate (%).

[0047] In embodiment 12-20, n 0 Both are 8143.5.

Embodiment 21-28

[0057] In the 500mL two-necked flask that condenser pipe, agitator are housed, add respectively chlorinated carbon five solvents (chlorine content n 0 mg / kg) 100g, naphthalene 32g, paraformaldehyde 14g, acetic acid 10g, tetraethylammonium bromide 0.8g. Stir m h at T°C. After the reaction, the reaction solution was distilled to collect the solvent. Determination of the chlorine content in the solvent, denoted as n 1 mg / kg, calculate the chlorine removal rate (%).

[0058] In embodiment 21-28, n 0 Both are 8143.5.

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Abstract

The invention provides a method for dechlorinating carbon five solvents, which belongs to the technical field of petrochemical industry. A method for dechlorinating carbon five solvents, comprising the following steps: S1: placing chlorine-containing carbon five solvents, naphthalene, paraformaldehyde, acetic acid and quaternary ammonium salts in a distillation flask, and then performing a heating reaction; S2: reacting for a period of time Afterwards, the obtained reaction solution was distilled, the solvent was collected, and the chlorine content in the solvent was measured. The dechlorination method of the C5 solvent of the present invention has a dechlorination effect of more than 55%, especially for the C5 solvent with a high chlorine concentration, which has a better dechlorination effect, and the C5 solvent has a higher chlorine content (≥5000 mg / kg) In the case of , the dechlorination effect is better, the chlorine removal rate is higher than 60%, and the best dechlorination effect is obtained when the chlorine content is 8143.5 mg / kg. Moreover, the operation method of the invention is simple, the process condition is mild, the process is easy to control, and is beneficial to industrial application and popularization.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and in particular relates to a method for dechlorination of carbon five solvents. Background technique [0002] With the continuous development of various fields, the demand for petroleum resin is also increasing, and the output of carbon penta-alkane solvent as its by-product is also increasing day by day. Due to the limitations of petroleum resin synthesis technology, aluminum trichloride is commonly used as a catalyst for synthetic petroleum resin, resulting in high chlorine content in the by-product solvent, and this type of organic chlorine is highly corrosive to equipment. At present, the main treatment method for chlorinated solvents is rectification, which divides the solvent into low-chlorinated solvents and enriched high-chlorinated solvents. The low-chlorinated solvents continue to be recycled, but there is no effective treatment method for high-chlorinated solvents. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C7/05C08L57/02
CPCC08J11/02C08J2357/02
Inventor 刘允攀仝其祥范凯杨毅宗红艳谭孔飞孙庆东
Owner PUYANG BINDER CHEM CO LTD
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