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Method for improving mixed C4 chemical industry exploitation value

A technology of mixing C4 and C4 chemicals, applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve the problems of low comprehensive utilization rate of chemical utilization value, and achieve the effect of improving value and good technical effect.

Active Publication Date: 2009-07-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is the problem of low chemical utilization value and comprehensive utilization rate of the by-product mixed carbon four of the steam cracking unit and the low comprehensive utilization rate of the by-product mixed carbon four of the steam cracking device in the prior art, and provides a new method for improving the chemical utilization of the mixed carbon four value method

Method used

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  • Method for improving mixed C4 chemical industry exploitation value
  • Method for improving mixed C4 chemical industry exploitation value
  • Method for improving mixed C4 chemical industry exploitation value

Examples

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Effect test

Embodiment 1

[0026] according to figure 1 As shown, the mixed carbon four composition (weight %) is: butadiene: 40.0%, isobutene: 12.0%, butene-1: 18.0%, butene-2: 18.2%, butane: 11.8%. Adopting the technical process of the present invention, the selective hydrogenation reaction catalyst is aluminum oxide supported metal palladium, the hydrogen-oil ratio of the reaction feed is 150:1 (volume), and the reaction space velocity is 3 hours -1 , the reactor inlet temperature is 60°C, and the reaction pressure is 3.0MPa; the hydroisomerization reaction catalyst is aluminum oxide supported metal palladium, the reaction feed hydrogen oil ratio is 90:1 (volume), the reaction temperature is 40°C, and the reaction The pressure is 0.8MPa; the refining separation tower is a floating valve tower with 80 trays, and the operating pressure at the top of the tower is 0.4MPa; the disproportionation reaction catalyst is tungsten oxide, the reaction temperature is 280°C, the reaction pressure is 2.8MPa, and th...

Embodiment 2

[0028] according to figure 1 As shown, the mixed carbon four composition (weight %) is: butadiene: 30.0%, isobutene: 12.0%, butene-1: 18.0%, butene-2: 18.2%, butane: 21.8%. Adopting the technical process of the present invention, the selective hydrogenation reaction catalyst is aluminum oxide supported metal nickel, the hydrogen-oil ratio of the reaction feed is 100:1 (volume), and the reaction space velocity is 5 hours -1 , the reactor inlet temperature is 100°C, and the reaction pressure is 3.5MPa; the hydroisomerization reaction catalyst is aluminum oxide supported metal nickel, the hydrogen-oil ratio of the reaction feed is 60:1 (volume), the reaction temperature is 70°C, and the reaction The pressure is 1.2MPa; the refining separation tower is a sieve tray tower with 100 trays, and the operating pressure at the top of the tower is 0.6MPa; the disproportionation reaction catalyst is tungsten oxide, the reaction temperature is 300°C, the reaction pressure is 3.2MPa, and the...

Embodiment 3

[0030] according to figure 1 As shown, the mixed carbon four composition (weight %) is: butadiene: 20.0%, isobutene: 15.0%, butene-1: 18.0%, butene-2: 18.2%, butane: 28.8%. Adopting the technical process of the present invention, the selective hydrogenation reaction catalyst is aluminum oxide supported metal palladium, the hydrogen-oil ratio of the reaction feed is 60:1 (volume), and the reaction space velocity is 8 hours -1 , the reactor inlet temperature is 40°C, and the reaction pressure is 2.5MPa; the hydroisomerization reaction catalyst is aluminum oxide supported metal nickel, the reaction feed hydrogen-oil ratio is 30:1 (volume), the reaction temperature is 55°C, and the reaction The pressure is 0.9MPa; the refining separation tower is a packed tower, the packing height is 28 meters, and the operating pressure at the top of the tower is 0.8MPa; the disproportionation reaction catalyst is tungsten oxide, the reaction temperature is 330°C, the reaction pressure is 2.2MPa,...

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Abstract

The invention relates to a method for improving the chemical industrial utilization value of mixed C4. The method mainly solves the problem that the chemical industrial utilization value and the comprehensive utilization rate of a byproduct of the mixed C4 of a steam cracking device and the byproduct of the mixed C4 of an FCC device in the prior art are low. The invention solves the problem well by the technical proposal which comprises the steps as follows: 1) a selective hydrogenation technology is adopted to ensure that butadiene and acetylene in the mixed C4 are hydrogenated into monoolefine; 2) a hydroisomerization technology is adopted to ensure that butylene-1which is a product in step 1 is isomerized into butylene-2; 3) the product of step 2 is separated by rectifying technology to obtain a product of isobutene; 4) olefin disproportionation technology is used for disproportionating the butylene-2 in the rest of the mixed C4 in step 3 and ethane to produce propylene; and 5) the remained mixed C4 in step 4 is recycled as a cracking raw material. The invention can be used in the industrial production for increasing the production of the propylene and improving the chemical industrial utilization value of the mixed C4.

Description

technical field [0001] The invention relates to a method for improving the utilization value of mixed C4 chemical industry. Background technique [0002] Mixed carbon four refers to the by-product C of the steam cracking unit 4 Distillates and by-products of catalytic cracking units C 4 Distillate, the mixed C4 by-product of the steam cracking unit is generally extracted from butadiene, and the MTBE unit utilizes isobutene. Although the last remaining mixed C4 contains a large amount of butene-1 and butene-2, most of it is used as For the use of liquefied petroleum gas, some manufacturers will separate and purify butene-1. And the mixed C produced by the catalytic cracking unit 4 Basically used as liquefied gas. Therefore, most of the mixed C4s have not fully utilized their chemical value, and the comprehensive utilization rate is extremely low. In recent years, there have been many studies on how to improve the utilization value of mixed C4 chemical industry. [0003]...

Claims

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Application Information

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IPC IPC(8): C07C7/00C07C6/02C07C5/23C07C11/08C07C11/06C07C11/16
Inventor 甘永胜钱宏义何志
Owner CHINA PETROLEUM & CHEM CORP
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