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Method for producing propone by comprehensive utilization of mixed C4

A technology of mixing C4 and propylene, which is applied in the fields of hydrocarbon cracking, hydrocarbon production, organic chemistry, etc., can solve the problem of low comprehensive utilization rate of added value of mixed C4 chemical industry, and achieve improved technical economy, higher conversion rate, good technology effect of effect

Active Publication Date: 2010-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Description
  • Claims
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is the problem that the added value of mixed C4 chemical industry utilization and the comprehensive utilization rate are not high in the prior art, and a new method for comprehensively utilizing mixed C4 to produce propylene is provided

Method used

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  • Method for producing propone by comprehensive utilization of mixed C4
  • Method for producing propone by comprehensive utilization of mixed C4

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Embodiment 1

[0025] according to figure 1 As shown, the mixed carbon four composition (weight %) is: butene-1: 28.0%, butene-2: 48.6%, isobutene: 0.2%, butane: 23.2%. Adopt technological process of the present invention, the used catalyst of reactor 2 is silicon-aluminum molar ratio (SiO 2 / Al 2 o 3 ) 300 ZSM-5 molecular sieve, the catalyst used in reactor 11 is magnesium oxide, and the catalyst used in reactor 12 is tungsten oxide; the reaction weight hourly space velocity of reactor 2 is 30 hours -1 , the reaction temperature is 550°C, the reaction pressure is 0.05MPa; the reaction weight hourly space velocity of the reactor 11 is 20 hours -1 , the reaction temperature is 350°C, the reaction pressure is 3.0MPa; the reaction weight hourly space velocity of the reactor 12 is 10 hours -1 , the reaction temperature is 350° C., and the reaction pressure is 3.0 MPa; the pilot plant proves that the propylene yield obtained is 60.3% (by weight, for the content of olefins in the mixed carbon ...

Embodiment 2

[0027] according to figure 1 As shown, the mixed carbon four composition (weight %) is: butene-1: 28.0%, butene-2: 48.6%, isobutene: 0.2%, butane: 23.2%. Adopt technological process of the present invention, the used catalyst of reactor 2 is silicon-aluminum molar ratio (SiO 2 / Al 2 o 3) 300 ZSM-5 molecular sieve, the catalyst used in reactor 11 is magnesium oxide, and the catalyst used in reactor 12 is tungsten oxide; the reaction weight hourly space velocity of reactor 2 is 15 hours -1 , the reaction temperature is 500°C, the reaction pressure is 0.15MPa; the reaction weight hourly space velocity of the reactor 11 is 10 hours -1 , the reaction temperature is 300°C, the reaction pressure is 2.8MPa; the reaction weight hourly space velocity of the reactor 12 is 5 hours -1 , the reaction temperature is 300° C., and the reaction pressure is 2.8 MPa; the pilot plant proves that the yield of propylene is 66.8% (by weight, for the content of olefins in the mixed carbon four). ...

Embodiment 3

[0029] according to figure 1 As shown, the mixed carbon four composition (weight %) is: butene-1: 28.0%, butene-2: 48.6%, isobutene: 0.2%, butane: 23.2%. Adopt technological process of the present invention, the used catalyst of reactor 2 is silicon-aluminum molar ratio (SiO 2 / Al 2 o 3 ) 300 ZSM-5 molecular sieve, the catalyst used in reactor 11 is magnesium oxide, and the catalyst used in reactor 12 is tungsten oxide; the reaction weight hourly space velocity of reactor 2 is 8 hours -1 , the reaction temperature is 480°C, the reaction pressure is 0.1MPa; the reaction weight hourly space velocity of the reactor 11 is 5 hours -1 , the reaction temperature is 250°C, the reaction pressure is 2.5MPa; the reaction weight hourly space velocity of the reactor 12 is 5 hours -1 , the reaction temperature is 250° C., and the reaction pressure is 2.5 MPa; the pilot plant proves that the propylene yield obtained is 63.1% (by weight, for the content of olefins in the mixed carbon four...

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Abstract

The invention relates to a method for producing a propylene by comprehensively utilizing a mixed C4, which mainly solves the problems of low chemical utilization added value of the mixed C4 and low comprehensive utilization rate of the prior art. The invention properly solves the problems by adopting the technical proposal comprising the following steps of: 1) adopting the olefin catalytic cracking technique to catalytically crack the olefin in the mixed C4 into a propylene and an ethylene ; 2) utilizing the butene isomerization technique to isomerize the butane in the residual mixed C4 afterthe first step reaction into a butene-2; and 3) using the olefin dismutation technique to implement the dismutation of the ethylene produced by the butene-2 in the mixed C4 and the first step reaction into the propylene, and the method of preparation can be applied to the industrial production for increasing the production of propylene.

Description

technical field [0001] The invention relates to a method for comprehensively utilizing mixed carbon four to produce propylene. Background technique [0002] Propylene is one of the important basic organic chemical raw materials. Propylene is mainly used in the production of polypropylene, cumene, propylene oxide, acrylonitrile, acrylic acid and many other products. As an important light olefin, the annual demand for propylene is constantly increasing. The process of producing propylene can generally be summarized as by-product process and proprietary process. The by-product process mainly refers to propylene obtained by steam cracking and catalytic cracking ethylene units. Proprietary process refers to the process specially developed for the production of propylene, currently mainly including propane dehydrogenation and other process technologies. Mixed C4 refers to the by-products of steam cracking unit and catalytic cracking unit. At present, the mixed C4 by-product of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C4/06C07C11/06
Inventor 甘永胜钱宏义
Owner CHINA PETROLEUM & CHEM CORP
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