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Method for double bond isomerization of butene

A technology of isomerization and butene, applied in the field of isomerization of butene double bonds, can solve the problems of low selectivity of reaction products, short catalyst activity period, etc., and achieve the effect of good technical effect

Active Publication Date: 2012-08-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of low selectivity of reaction products and short catalyst activity period in the previous literature technology, and a new isomerization method of butene double bond is provided

Method used

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  • Method for double bond isomerization of butene

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Experimental program
Comparison scheme
Effect test

Embodiment 1～9

[0017] The preparation method of catalyst I:

[0018] Weigh 100 grams of light magnesia powder, add 20 grams of astragalus powder, and then add 30 grams of water, stir thoroughly, extrude, dry and roast to obtain the magnesia catalyst.

[0019] The preparation method of catalyst II:

[0020] With reference to document CN200310108177.5, according to the molar ratio of silicon to aluminum (SiO 2 / Al 2 o 3 ) is the slurry containing silicon, aluminum, templating agent and water of the ratio preparation of 200 respectively, at 130 ℃, under the condition of 70 hours, synthesizes 150 grams of ZSM-5 molecular sieves, then adds 18 grams of 40% (weight) colloidal silica and mixes Afterwards, extruded, dried at 120°C, and calcined at 550°C for 4 hours to obtain the required catalyst II.

[0021] According to the weight loading ratio of the catalyst I and the catalyst II being 1:1, the required amounts of the catalyst I and the catalyst II were weighed respectively, and the catalyst ...

Embodiment 10～19

[0025] According to each step of embodiment 1, just catalyst II is silicon aluminum molar ratio (SiO 2 / Al 2 o 3 ) 300 ZSM-5 molecular sieve, using refinery raffinate II as raw material (by weight percentage, n-butane 17.8%, cis-2-butene 22.2%, trans-2-butene 60%), at a temperature of 320 hours -1 , under the condition of 0.1MPa pressure, the reaction results of isomerization of butene-2 ​​to butene-1 under different reaction weight space velocity conditions are shown in Table 2:

[0026] Table 2

[0027] serial number

Embodiment 20～29

[0029] According to each step of embodiment 1, just catalyst II is silicon aluminum molar ratio (SiO 2 / Al 2 o 3 ) 800 ZSM-5 molecular sieve, using refinery raffinate II as raw material (by weight percentage, n-butane 17.8%, cis-2-butene 22.2%, trans-2-butene 60%), at a temperature of 320 hours -1 , the pressure is 0.5MPa, the weight space velocity is 5h -1 Under the conditions, the reaction results of isomerization of butene-2 ​​to butene-1 under different weight loading ratios of catalyst I and catalyst II are shown in Table 3 below:

[0030] table 3

[0031]

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Abstract

The invention relates to a method for double bond isomerization of butene, and mainly solves the technical problem in the prior art that the reaction product selectivity is low, and the active period of a catalyst is short. Through the adoption of the technical scheme that under the conditions that the reaction temperature is 100 to 450 DEG C, the reaction pressure is -0.08 to 10 MPa, the weight space velocity is 0.1 to 100 hours<-1>, a raw material containing butene is in contact reaction with a catalyst I and a catalyst II in a composite-bed reactor in sequence to generate an effluent containing butene-1 and butene-2 mol ratio close to a thermodynamic equilibrium value, wherein the catalyst I is made of magnesium oxide or silicon oxide, the catalyst is a ZSM molecular sieve with SiO2 / AL2O3 mol ratio being 100 to 2,000, and the weight filling ratio of the catalyst I and the catalyst II is (0.1 to 8) : 1. Therefore, the invention solves the problems well, and can be used in the industrial production of double bond isomerization of butene.

Description

technical field [0001] The invention relates to a method for isomerizing butene double bonds, in particular to a method for isomerizing butene-2 ​​and butene-1 double bonds. Background technique [0002] 1-butene is a chemically active α-olefin. High-purity 1-butene is mainly used as a comonomer in the production of linear low-density polyethylene (LLDPE). LLDPE has good high-temperature creep properties and is relatively High impact strength, heat resistance and wear resistance, especially suitable for hot water pipes, so it has become a thermoplastic polymer material that has grown rapidly in recent years; at the same time, other oligomerization products of 1-butene, such as dimer 1- Octene and trimer dodecene can replace 1-butene to synthesize better LLDPE and HDPE, and can also be widely used in automotive and lubricating oil additives, synthetic detergents, surfactants, plasticizers, printing and dyeing Agents, emulsifiers, etc., its use is very wide, and the amount is...

Claims

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Application Information

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IPC IPC(8): C07C11/08C07C5/25B01J21/10B01J21/08B01J29/40B01J29/65
Inventor 刘俊涛孙凤侠蒯骏
Owner CHINA PETROLEUM & CHEM CORP
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