Method for increasing butene-2 yield through C4 fraction containing small amount of butadiene

A carbon four fraction, butadiene technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, organic chemistry, etc., to achieve good resistance to impurities and poisons, high isomerization rate, and reduce olefin loss. Effect

Inactive Publication Date: 2013-12-04
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the conversion rate of butadiene is as high as 99.8%, and the isomerization rate of butene-1 is as high as 76.1%, the amount of n-butane generation is as high as 35.7%.

Method used

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  • Method for increasing butene-2 yield through C4 fraction containing small amount of butadiene
  • Method for increasing butene-2 yield through C4 fraction containing small amount of butadiene
  • Method for increasing butene-2 yield through C4 fraction containing small amount of butadiene

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Experimental program
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Effect test

Embodiment 1

[0014] Hydrogenation and isomerization operations are carried out in fixed-bed adiabatic reactors. The nickel-based catalyst prepared according to the method described in claim 2 is filled in the reactor, and the catalyst is sulfurized and activated in situ. The selective hydrogenation and isomerization operations of the ether C4 fraction containing 1.56% butadiene were carried out in a continuous manner.

[0015] During the hydroisomerization process, the operating conditions are as follows: Reactor inlet temperature: 60 o C; Reactor pressure: 1.2MPa

[0016] Liquid phase space velocity: 6h -1 , hydrogen / butadiene molar ratio: 2.15; see Table 1 for the composition of the material and the effluent of the hydroisomerization reactor operated under the above conditions.

[0017] Table 1

[0018]

Embodiment 2

[0020] Hydrogenation and isomerization operations are carried out in fixed-bed adiabatic reactors. The nickel-based catalyst prepared according to the method described in claim 2 is filled in the reactor, and the catalyst is sulfurized and activated in situ. The selective hydrogenation and isomerization operations of the raffinate C4 fraction containing 0.60% butadiene are carried out in a continuous manner.

[0021] During the hydroisomerization process, the operating conditions are as follows: Reactor inlet temperature: 60 o C; Reactor pressure: 1.4MPa; Liquid phase space velocity: 6h -1 Hydrogen / butadiene molar ratio: 2.67; See Table 2 for the composition of the hydroisomerization reactor effluent operated under the above-mentioned conditions.

[0022] Table 2

[0023]

Embodiment 3

[0025] Hydrogenation and isomerization operations are carried out in fixed-bed adiabatic reactors. The nickel-based catalyst prepared according to the method described in claim 2 is filled in the reactor, and the catalyst is sulfurized and activated in situ. The selective hydrogenation and isomerization operations of the ether C4 C4 fraction containing butadiene with a mass fraction of 0.21% were carried out in a continuous manner.

[0026] The operating conditions of hydroisomerization are as follows: Reactor inlet temperature: 70 o C; Reactor pressure: 1.6MPa; Liquid phase space velocity: 6h -1 , Hydrogen / butadiene molar ratio: 2.8; See Table 3 for the composition of the material and the effluent of the hydroisomerization reactor operated under the above conditions.

[0027] table 3

[0028]

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Abstract

The present invention relates to a method for increasing a butene-2 yield through a C4 fraction containing a small amount of butadiene, wherein the technical problem of low olefin yield in the prior art is mainly solved with the present invention. The technical scheme comprise that a C4 fraction containing a small amount of butadiene and hydrogen are adopted as raw materials, and the raw materials contact a catalyst at a reactor inlet temperature of 30-70 DEG C under a pressure of 1.2-2 MPa according to a hydrogen / butadiene ratio of 2.0-3.0, wherein the catalyst is a nickel base catalyst. With the technical scheme, the problem in the prior art is well solved, and the method can be widely used for olefin disproportionation, alkylation and other industrial productions.

Description

technical field [0001] The invention relates to a method for increasing the production of butene-2 ​​from a carbon four fraction containing a small amount of butadiene. Background technique [0002] Industrial C4 fractions mainly include ethylene cracking by-product C4 and refinery by-product C4, which contain varying amounts of butadiene, n-butene (butene-1, butene-2), isobutene, isobutene Butane, n-butane, etc., these components are widely used chemical raw materials, especially the large amount of carbon tetraolefins contained in them. Since one-stage hydrogenation C4, two-stage hydrogenation C4, general raffinate C4 and C4 after ether, refinery C4 and C4 after ether all contain a certain amount of alkynes, dienes, etc. , affect the purity of downstream processes and products to varying degrees, and some polymerization reactions require that alkynes and dienes in raw olefins be less than 1×10 - 6 . Therefore, high requirements are put forward for the selective hydrogen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/08C07C5/13B01J27/188B01J23/85
Inventor 刘仲能赵多王建强顾国耀李则俊
Owner CHINA PETROLEUM & CHEM CORP
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