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Preparation method and preparation device of dichloroprene prepared from dichlorobutylene

A technology of dichlorobutadiene and dichlorobutene, which is applied in the field of dichlorobutadiene preparation, can solve the problems of cumbersome operation, many equipments, and high risk factor of operation, and achieve the effect of solving the pollution problem and meeting the demand

Active Publication Date: 2015-03-25
重庆化医长寿化工集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The recovery process of dichlorobutene can be reacted with dimethylamine in lye solution, dehydrochlorination to obtain chloroprene and vinyl acetylene for recycling. This process is intermittent operation, with many equipments and complicated operation. Vinyl acetylene is very easy to form explosive mixtures with air, and the operation risk factor is high
Dichlorobutene can also be pyrolyzed at 450-550°C to obtain chloroprene and hydrogen chloride, which can be recycled. This process technology is not yet mature, and the design of the cracking reactor is difficult.
At the same time, it is introduced in the data that foreign countries have carried out research, development and production of sulfur-adjusted cold-resistant neoprene, but there is no such product in the Chinese market.

Method used

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  • Preparation method and preparation device of dichloroprene prepared from dichlorobutylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115] Main raw material specifications:

[0116] (1) Crude dichlorobutene

[0117] Mass percentage composition:

[0118] Dichlorobutene (1,3-dichloro-2-butene, 1,4-dichloro-2-butene and 3,4-dichloro-1-butene) 93.83%

[0119] Chloroprene: 3.40%

[0120] Xylene: 1.66%

[0121] 1-Chlorobutyne: 0.38%

[0122] Benzene: 0.25%

[0123] 3,4-Dichlorobutene: 0.18%

[0124] Vinyl acetylene: < 0.01%

[0125] Other: balance

[0126] (2) Chlorine:

[0127] Cl2 ≥99.8% (v / v)

[0128] H2O and other oxygen-containing mixtures ≤0.015% (w / w)

[0129] A. Purify the raw material crude dichlorobutene to a purity of ≥98%: the raw material crude dichlorobutene is purified by two-stage vacuum distillation, and the first-stage tower removes the light component impurities contained in the raw material crude dichlorobutene , the secondary tower removes the heavy component impurities in the raw material crude dichlorobutene, further dehydration and acid neutralization after rectification and ...

Embodiment 2

[0138] Main raw material specifications:

[0139] Ditto.

[0140] Preparation Process:

[0141] A. Purify the raw material crude dichlorobutene to a purity of ≥98%: the raw material crude dichlorobutene is purified by two-stage vacuum distillation, and the first-stage tower removes the light component impurities contained in the raw material crude dichlorobutene , the secondary tower removes the heavy component impurities in the raw material crude dichlorobutene, further dehydration and acid neutralization after rectification and purification;

[0142] B. The purified dichlorobutene reacts in the chlorination tank to generate trichlorobutene under the condition of pressure 0.1barG, temperature 20±2°C, and chlorine flow rate of 1 Nm3 chlorine / kg-dichlorobutene. , adding a polymerization inhibitor in the reaction, the polymerization inhibitor is phenolic thiophene and N-nitrosodiphenylamine..., and the reactor removes the heat released by the reaction with a cooling jacket...

Embodiment 3

[0150] Main raw material specifications:

[0151] Ditto.

[0152] Preparation Process:

[0153] A. Purify the raw material crude dichlorobutene to a purity of ≥98%: the raw material crude dichlorobutene is purified by two-stage vacuum distillation, and the first-stage tower removes the light component impurities contained in the raw material crude dichlorobutene , the secondary tower removes the heavy component impurities in the raw material crude dichlorobutene, further dehydration and acid neutralization after rectification and purification;

[0154] B. The purified dichlorobutene reacts in the chlorination tank to generate trichlorobutene under the condition of pressure 0.2barG, temperature 10±2℃, and chlorine flow rate of 2 Nm3 chlorine gas / kg-dichlorobutene. , adding a polymerization inhibitor in the reaction, the polymerization inhibitor is phenolic thiophene and N-nitrosodiphenylamine..., and the reactor removes the heat released by the reaction with a cooling jac...

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PUM

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Abstract

The present invention disclose a preparation method and its preparation device for dichlorobenne -based dichlocchlorite. It belongs to the field of dichlocophylene preparation.Anene, then get rid of H+, CL- under the action of NaOH, and obtain 2,3-dichloro-1,3-butadiene.Preparation device for dichlorophyl divinne, including refined dichlocchlorophyll supply device, chlorine supply device, chlorine kettle, NAOH supply device, and deoxyrose kettle.The supply device is connected to the chlorine kettle, which is further connected to the NAOH supply device and the described dehydrogen chloride kettle connecting.The present invention is a method and device for 2,3-dichloro-1,3-butadiene to prepare dichlorophylne as raw materials.

Description

technical field [0001] The invention belongs to the field of dichlorobutadiene preparation. Background technique [0002] Neoprene rubber is a kind of synthetic rubber that came out in the 1930s. It has better comprehensive performance than natural rubber in the field of non-tire rubber products. Flexibility, its substitutes can only replace part of the performance, not all the functions of neoprene, so it has been widely used in adhesives, industrial rubber products, wire and cable and automobile industries, the production and consumption of neoprene It will be around for a long time, and it will be indispensable. [0003] There are two methods for the production of chloroprene rubber: the acetylene method and the butadiene method. In recent years, with the continuous rise of crude oil prices, the cost of raw materials for the butadiene method has continued to increase. Although the acetylene method is currently used to produce chloroprene rubber in the production process ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C17/25C07C21/21
Inventor 陈胜周齐领梁建平
Owner 重庆化医长寿化工集团有限公司
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