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Prepn of cholrinated paraffin-70

A technology of chlorinated paraffin and paraffin, applied in the field of organic flame retardants, can solve the problems of low chlorine content and softening point, carbon tetrachloride, and high product cost, and achieve stable product performance, reduce energy consumption, and maintain equipment The effect of low cost

Inactive Publication Date: 2004-09-08
JINGXIE CHEM PLANT MOUPING DISTRICT YANTAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a kind of method that adopts the method for producing chlorinated paraffin-70 by chemical-assisted thermal chlorination, mainly solves the problem that the existing method for producing chlorinated paraffin-70 has finished product Contains carbon tetrachloride, high investment, high product cost, corrosion equipment, low chlorine content and softening point

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1, after liquid chlorine is vaporized and mixed with melted semi-refined paraffin in the main reactor, the reaction temperature is controlled at 70°C to carry out the first-stage reaction, and the reaction time is 22 hours; the reaction temperature is controlled at 120°C, And add the acyl peroxide of catalyst amount to make catalyzer, carry out the reaction of the second removal stage, the reaction time is 45 hours; Continue to control the reaction temperature at 175 ℃, the reaction time is 55 hours, promptly make chlorinated paraffin-70; The tail gas containing chlorine and hydrogen chloride is generated in the reaction kettle, and then enters the series of secondary kettles for chlorine gas recovery reaction, and finally enters the reaction kettle for other chlorine preparations to further recover residual chlorine gas, and hydrogen chloride enters the falling film absorption tower for circular absorption to obtain by-products Industrial acid; finally, the s...

Embodiment 2

[0017] Embodiment 2, after liquid chlorine is vaporized and mixed with melted semi-refined paraffin in the main reactor, the reaction temperature is controlled at 50°C to carry out the first-stage reaction, and the reaction time is 24 hours; the reaction temperature is controlled at 90°C, And add a catalytic amount of acyl peroxide as a catalyst, carry out the reaction of the second removal stage, the reaction time is 50 hours; continue to control the reaction temperature at 150 ° C, and add a conventional amount of amine antioxidant as an anti-tarnish agent, the reaction The time is 60 hours, that is, chlorinated paraffin-70 is produced; the tail gas containing chlorine and hydrogen chloride generated in the main reactor is sequentially entered into the series of secondary kettles for chlorine gas recovery reaction, and finally enters the reaction kettles of other chlorine preparations for further The residual chlorine gas is recovered, and the hydrogen chloride enters the fal...

Embodiment 3

[0018] Example 3, gasify the liquid chlorine and mix it with the melted solid paraffin in the main reactor, control the reaction temperature to carry out the first-stage reaction at 90°C, and the reaction time is 20 hours; control the reaction temperature at 150°C, and Add a catalytic amount of acyl peroxide as a catalyst to carry out the reaction in the second removal stage, the reaction time is 40 hours; continue to control the reaction temperature at 200 ° C, and add a conventional amount of amine antioxidant as an anti-discoloration agent, add conventional Use a certain amount of alcohol as an anti-adhesive agent, and control the reaction time to 50 hours to obtain chlorinated paraffin-70; the tail gas containing chlorine and hydrogen chloride generated in the main reactor is sequentially entered into the series of secondary tanks for chlorine gas recovery reaction , and finally into the reaction kettle of other chlorine preparations to further recover residual chlorine, an...

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Abstract

The preparation of chlorinated paraffin-70 with liquid chlorine and solid paraffin as material includes mixing gasified chlorine and molten paraffin in the reactor, and three-stage substitution reaction in temperature controlled in 50-200 deg.c and controlled time to produce chlorinated paraffin-70. The product has no carbon tetrachloride contained, high chlorine content, high softening point and good use performance. The preparation process has low cost and no corrosion to apparatus.

Description

(1) Technical field: [0001] The invention relates to the technical field of organic flame retardants, in particular to a method for producing chlorinated paraffin-70 by a chemical-assisted thermal chlorination method. (two) background technology: [0002] Chlorinated paraffin is an additive flame retardant, because of its low price and good flame retardant effect, it is favored by users. The traditional domestic preparation methods of chlorinated paraffin-70 mainly include the following three methods: one is " Carbon tetrachloride solvent method ", its technology is relatively mature, reacts at normal temperature and normal pressure, the speed is fast, the technical indicators such as chlorine content and softening point are the easiest to meet the requirements, the disadvantage is that RCl-42 is used, three to four Double carbon tetrachloride is used as a solvent, because carbon tetrachloride has a low boiling point, is volatile, is highly toxic to humans, and is a substanc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G73/38
Inventor 王培善孙爱民
Owner JINGXIE CHEM PLANT MOUPING DISTRICT YANTAI
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