Butadiene preparation method

A technology of butadiene and cyclohexene, which is applied in the field of butadiene preparation, can solve the problems of low yield of butadiene and achieve the effect of increasing yield

Inactive Publication Date: 2014-02-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to provide a new butadiene preparation method in order to overcome the low defect of butadiene yield in the existing butadiene preparation process

Method used

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preparation example Construction

[0014] The method for preparing butadiene according to the present invention comprises subjecting cracking raw materials to steam cracking reaction, the cracking raw materials contain cyclohexene, and the content of cyclohexene in the cracking raw materials is 5-100% by weight.

[0015] In order to further increase the yield of butadiene, the content of cyclohexene in the cracking raw material is preferably 10-100% by weight, more preferably 20-100% by weight, and even more preferably 50-100% by weight.

[0016] In the present invention, the steam cracking reaction can be carried out in a cracking furnace. Among the cracking raw materials, in addition to cyclohexene, the cracking raw materials may also contain cracking raw materials commonly used in this field, such as light hydrocarbons, naphtha, diesel oil, hydrogenated tail oil, and the like. However, since cyclohexene is used in combination with naphtha, a relatively high yield of butadiene can be obtained, and coking in t...

Embodiment 1-4 and comparative example 1

[0027] The cracking raw materials were respectively injected into the CBL-III cracking furnace (purchased from China Petrochemical Corporation) for steam cracking reaction, and the yield of butadiene was detected. Among them, the cracking raw materials and reaction conditions are shown in Table 2 below. The cracking raw materials The mixing ratios in are weight ratios. The cracked gas (ie steam cracking reaction product) was collected, its composition was analyzed, and the yield of butadiene was calculated. The results are shown in Table 2 below.

[0028] Table 2

[0029]

[0030] It can be seen from the data in Table 2 that the butadiene production method according to the present invention can obtain a significantly improved butadiene yield. Specifically, by comparing Example 1 with Comparative Example 1, it can be seen that the cracking raw material used in Comparative Example 1 is naphtha, and the cracking raw material used in Example 1 is cyclohexene, and as a result, ...

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Abstract

The invention discloses a butadiene preparation method. The method comprises a step that a cracking raw material is subjected to a steam cracking reaction, the cracking raw material contains 5-100wt% of cyclohexene. The butadiene preparation method can substantially improve the butadiene yield.

Description

technical field [0001] The invention relates to a method for preparing butadiene. Background technique [0002] Butadiene usually refers to 1,3-butadiene, also known as vinyl ethylene, which is an important petrochemical basic raw material next to ethylene and propylene. Butadiene is mainly used in synthetic rubber and resins, such as polybutadiene rubber (BR), styrene-butadiene rubber (SBR), nitrile rubber (NBR), styrene-butadiene polymer latex, styrene thermoplastic elastomer (SBC) and Acrylonitrile-butadiene-styrene (ABS) resin. In addition, butadiene can also be used to produce organic chemical products such as adiponitrile, hexamethylenediamine, nylon-66, and 1,4-butanediol, which are widely used in many fields. [0003] The industrial production methods of butadiene have successively experienced ethanol dehydrogenation method, butene catalytic dehydrogenation method, butane catalytic dehydrogenation method, butene oxidative dehydrogenation method, and ethylene by-pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/167C07C4/04
Inventor 王国清张永刚张兆斌杜志国田岐周丛司宇辰巴海鹏南秀琴薛丽敏
Owner CHINA PETROLEUM & CHEM CORP
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