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A kind of method for preparing chlorinated paraffin

A technology of chlorinated paraffin and paraffin oil, which is applied in the direction of chemical instruments and methods, petrochemical modification, control/regulation process, etc., and can solve the problems of small product increase and weak effect

Active Publication Date: 2017-08-29
ZHEJIANG OCEANKING DEVELOPMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as the reaction proceeds, the raw material decreases and the product gradually increases, which leads to the weak effect of passing chlorine to the reaction kettle to promote the reverse and forward direction of the substitution, resulting in the late stage of the reaction such as the fourth to the sixth reaction kettle. The amount of residual chlorine in the tail gas increases gradually, but the amount of product increase is small, which needs to be improved

Method used

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  • A kind of method for preparing chlorinated paraffin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Step 1: paraffin oil enters the first reaction kettle continuously through the paraffin oil inlet, and chlorine enters each reaction kettle continuously from the chlorine gas supply main pipe and respectively through the chlorine inlet of each reaction kettle, and the paraffin oil and chlorine gas of the first reaction kettle are Under the catalysis of light, the pressure of the reactor is controlled to 0.018MPa, the reaction temperature is 90°C, and the chlorination reaction is carried out;

[0036] Step 2: the mixture of chlorinated paraffin and unreacted paraffin oil obtained in the previous reactor is cooled and circulated to 80°C and enters the latter reactor, while the hydrogen chloride and unreacted chlorine in the previous reactor enters the latter reactor, Under the catalysis of light, the pressure of the reactor is controlled to 0.018MPa, and the reaction temperature is 90°C, and the chlorination reaction is carried out sequentially in the second to sixth react...

Embodiment 2

[0038] Step 1: paraffin oil enters the first reaction kettle continuously through the paraffin oil inlet, and chlorine enters each reaction kettle continuously from the chlorine gas supply main pipe and respectively through the chlorine inlet of each reaction kettle, and the paraffin oil and chlorine gas of the first reaction kettle are Under the catalysis of light, the pressure of the reactor is controlled to 0.025MPa, the reaction temperature is 93°C, and the chlorination reaction is carried out;

[0039] Step 2: the mixture of chlorinated paraffin and unreacted paraffin oil obtained in the previous reactor is cooled and circulated to 82°C and enters the latter reactor, while the hydrogen chloride and unreacted chlorine in the previous reactor enters the latter reactor, Under the catalysis of light, the pressure of the reactor is controlled to 0.025MPa, the reaction temperature is 93°C, and the chlorination reaction is carried out sequentially in the second to sixth reactors;...

Embodiment 3

[0042] Step 1: paraffin oil enters the first reaction kettle continuously through the paraffin oil inlet, and chlorine enters each reaction kettle continuously from the chlorine gas supply main pipe and respectively through the chlorine inlet of each reaction kettle, and the paraffin oil and chlorine gas of the first reaction kettle are Under the catalysis of light, the pressure of the reactor is controlled to 0.03MPa, the reaction temperature is 94°C, and the chlorination reaction is carried out;

[0043] Step 2: the mixture of chlorinated paraffin and unreacted paraffin oil obtained in the previous reactor is cooled and circulated to 84°C and enters the latter reactor, while the hydrogen chloride and unreacted chlorine in the previous reactor enters the latter reactor, Under the catalysis of light, the pressure of the reactor is controlled to 0.03MPa, the reaction temperature is 96°C, and the chlorination reaction is carried out sequentially in the second to sixth reactors; ...

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Abstract

The invention discloses a method for preparing chlorcosane. The method comprises the following steps of: 1) causing paroline continuously enter into a first reaction kettle, causing chlorine continuously and respectively enter into each reaction kettle through a chlorine inlet of each reaction kettle and performing chlorination on the paroline and chlorine in the first reaction kettle under the optical catalyst; 2) putting the mixture of the chlorcosane acquired in the previous reaction kettle and the unreacted paroline into the subsequent reaction kettle, putting the hydrogen chloride in the previous reaction kettle and the unreacted chlorine into the subsequent reaction kettle, and successively performing chlorination in the second to sixth reaction kettles under the optical catalysis effect; and 3) after reaching the sixth reaction kettle, collecting the products and performing after-treatment, wherein the hydrogen chloride and the unreacted chlorine in the fourth reaction kettle and the fifth reaction kettle enter into saturate salt water and then anhydrous calcium chloride is dried and added into the subsequent reaction kettle. The method has the beneficial effect that the higher increment of the products can be acquired by adopting low chlorine dosage in the later period of the reaction.

Description

technical field [0001] The invention relates to a preparation method of chlorinated compounds, in particular to a method for preparing chlorinated paraffin. Background technique [0002] Chlorinated paraffin is a chlorinated derivative of paraffin. It has the advantages of low volatility, flame retardancy, good electrical insulation, and low price. It can be used as a flame retardant and an auxiliary plasticizer for PVC, and is widely used in the production of cables Materials, floor materials, hoses, artificial leather, rubber and other products as well as additives used in coatings, plastic track, lubricating oil, etc. [0003] The Chinese patent with the publication number CN105112100A discloses a continuous production process of chlorinated paraffin. This production process changes the recovery and utilization mode of tail gas, so that the chlorine in the tail gas can be fully utilized, so that the utilization rate of chlorine gas is almost 100%. [0004] In the first t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G73/38B01J19/18B01J19/00
CPCB01J19/0006B01J19/0013B01J19/0046B01J19/18B01J2208/00539B01J2219/00081B01J2219/00103B01J2219/00481B01J2219/00495C10G73/38
Inventor 周南胡贵勇颜鹏俞先康
Owner ZHEJIANG OCEANKING DEVELOPMENT CO LTD