Mixed C4 utilizing method and device

A technology for mixing C4 and mixtures, applied in chemical instruments and methods, chemical/physical/physicochemical processes, chemical/physical processes, etc., can solve problems such as difficult separation

Active Publication Date: 2018-02-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it still cannot meet the industry's demand for the utilization of mixed C4 resources, and it is necessary to provide more and better methods to make full use of mixed C4 resources to overcome the difficulty of separating or purifying C4 hydrocarbons.

Method used

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  • Mixed C4 utilizing method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0017] According to a preferred embodiment of the present invention, the composition content of the mixed C4 may be 5-10% by weight of 1-butene, 5-15% by weight of isobutene, 10-20% by weight of 1,3-butadiene, 1 , 5-15% by weight of 2-butadiene, 0.5-5% by weight of n-butane, 0.5-2% by weight of isobutane, 20-40% by weight of cis-2-butene, 2-10% by weight of trans-2-butene %, vinyl acetylene 5 to 20% by weight.

[0018] According to another preferred embodiment of the present invention, the composition content of the mixed C4 may be 0.1-2% by weight of 1-butene, 10-30% by weight of isobutene, 0.01-0.1% by weight of 1,3-butadiene, 0.5 to 5% by weight of n-butane, 30 to 40% by weight of isobutane, 20 to 40% by weight of cis-2-butene, and 5 to 20% by weight of trans-2-butene.

[0019] According to another preferred embodiment of the present invention, the composition content of the mixed C4 may be 5-15% by weight of 1-butene, 0.5-3% by weight of isobutene, 20-30% by weight of n-b...

Embodiment 1

[0075] This example illustrates the method for utilization of mixed C4 of the present invention.

[0076] The mixed C4A of 14kg is passed into the reaction kettle of 200L that fills the organic reaction solution of 20kg maleic anhydride, 2.4kg azobisisobutyronitrile and 100L isoamyl acetate to carry out free radical copolymerization reaction, and copolymerization reaction pressure is 0.9MPa, the copolymerization reaction temperature is 70°C, and the copolymerization reaction time is 6h;

[0077] Pass the copolymerization reaction product into the flash separator for gas-liquid separation at 25°C and 0MPa. The obtained liquid-solid mixture continues to be separated in the centrifuge at 4000rpm and centrifuged for 20min to obtain a solid copolymer. Powder and liquid are returned to the reactor.

[0078] The gas phase product obtained by flash separation is passed into the cracking furnace for steam cracking reaction at 800°C, and the cracked gas obtained is returned to the abov...

Embodiment 2

[0083] This example illustrates the method for utilization of mixed C4 of the present invention.

[0084] The mixed carbon four B of 13.5kg is passed into the reaction kettle of 200L that fills the organic reaction solution of 20kg maleic anhydride, 4kg dibenzoyl peroxide and 100L isoamyl acetate to carry out radical copolymerization reaction, and copolymerization reaction pressure is 1MP, the copolymerization reaction temperature is 80°C, and the copolymerization reaction time is 6h;

[0085] Pass the copolymerization reaction product into the flash separator for gas-liquid separation at 30°C and 0MPa, and continue to separate the liquid-solid mixture in the centrifuge at 4000rpm for 20 minutes to obtain solid copolymer particles Powder and liquid are returned to the reactor.

[0086] The gas phase product obtained by flash separation is passed into the cracking furnace, and the steam cracking reaction is carried out at 820°C, and the cracked gas obtained is returned to the ...

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Abstract

The invention relates to the field of mixed C4 utilization, and discloses a mixed C4 utilizing method. The method comprises the following steps: (1) in the existence of nitrogen, an initiating agent and an organic solvent, performing copolymerization on part or all of terminal olefin in a mixed C4-containing material and maleic anhydride; (2) performing gas-liquid separation on a product obtainedin the step (1) to obtain a gas phase product and a liquid-solid mixture, wherein based on the total weight of the gas phase product, the content of the terminal olefin in the gas phase product is 1 weight percent or below, and the content of 1,3-butadiene is 0.1 weight percent or below; (3) performing steam cracking reaction on the gas phase product obtained in the step (2), and returning obtained cracking gas to the material in the step (1); (4) performing liquid-solid separation on the liquid-solid mixture obtained in the step (2), wherein the obtained solid product is a polymer which contains a maleic anhydride functional group, and the mixed C4 is a mixture which contains a C4 hydrocarbon compound. The mixed C4 can be converted into a raw material of a functional material for utilizing.

Description

technical field [0001] The present invention relates to the field of utilization of mixed carbon four, in particular to a method and device for utilization of mixed carbon four. The method realizes the preparation of the mixed C4 into a random polymer containing maleic anhydride functional groups through the process route of the combination of copolymerization reaction and steam cracking, which can be further used as a raw material for preparing functional materials and can be utilized. Background technique [0002] In the production process of ethylene units, oil refining units and methanol-to-olefins units, some mixtures of alkanes and olefins, such as mixtures of hydrocarbons with 4 carbon atoms (referred to as mixed carbon four), are often produced. Because the separation cost of the components (alkanes, alkenes, and alkynes) in the mixture is too high or difficult to separate, they are usually burned directly as industrial fuels or civil liquefied gas. However, the com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/06C08F210/08C08F210/10C08F238/04C08F236/06C08F236/20C08F2/01B01J19/00
CPCB01J19/00C08F2/01C08F222/06C08F210/08C08F210/10C08F238/04C08F236/06C08F236/20
Inventor 刘振杰宋文波乔金樑王国清张晓萌张永刚
Owner CHINA PETROLEUM & CHEM CORP
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