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Catalyst for double bond isomerization of butene

A double bond isomerization and catalyst technology, applied in physical/chemical process catalysts, isomerization hydrocarbon production, molecular sieve catalysts, etc., can solve the problems of low reaction product selectivity and short catalyst activity period.

Active Publication Date: 2016-02-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • 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 catalyst for isomerization of butene double bonds is provided

Method used

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  • Catalyst for double bond isomerization of butene
  • Catalyst for double bond isomerization of butene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Refer to the preparation method of CN200310108177.5 to obtain silicon-aluminum molar ratio SiO 2 / Al 2 o 3 300 ZSM-5 molecular sieve.

[0024] Add 50 grams of the above-mentioned molecular sieves into 80 milliliters of an aqueous solution containing 2.0 grams of MgO, heat to dryness under stirring, then dry at 110° C. for 8 hours, roast at 580° C. for 2 hours, and pulverize. Add 8 grams of safflower essence and mix evenly, then add 20 grams of 40% by weight silica sol to adjust to a paste, and then extrude it into a bar shape of Φ2 mm by an extruder. After baking at 120 DEG C for 8 hours, then roasting at 550 DEG C for 4 hours, a catalyst containing 3% of MgO and 83% of molecular sieves was obtained in terms of weight percentage.

[0025] When the reaction temperature is 300°C, the reaction pressure is 0.5MPa, and the weight space velocity is 10 hours -1 Under the condition of certain conditions, the double bond isomerization reaction is carried out using refinery r...

Embodiment 2～15

[0027] Same preparation process as embodiment 1, change the SiO of molecular sieve 2 / Al 2 o 3 Molar ratio and rare earth content, get catalyst, and adopt refinery raffinate II to be raw material (by weight percentage, n-butane 16.8%, cis-2-butene 23.2%, trans-2-butene 60%), in Reaction temperature 310°C, reaction space velocity 6 hours -1 , under the condition that the reaction pressure is 0.5MPa, the reaction results are shown in Table 1 below.

[0028] Table 1

[0029]

[0030] Note: the alkaline earth content in the above examples is calculated based on the oxide content.

Embodiment 16

[0032] Adopt the catalyzer of embodiment 5, take refinery raffinate II as raw material (by weight percent, n-butane 16.8%, cis-2-butene 23.2%, trans-2-butene 60%), at reaction temperature 310 ℃, reaction space velocity 5 hours -1 , the reaction pressure is to carry out the catalyst stability (activity period) test under the condition of 0.8MPa, and its reaction result is as follows table 2:

[0033] Table 2

[0034]

[0035] The catalyst was tested for stability for 3300 hours, and the activity remained stable.

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Abstract

The invention relates to a catalyst for double bond isomerization of butane, and mainly solves the problems of low reaction product selectivity and short active period of catalyst in the prior art. The catalyst comprises the following components in percentage by weight: 50 to 94% of ZSM-5 molecular sieve with the molar ratio of SiO2 and Al2O3 of 40 to 1000, 0.001 to 6 % of alkaline earth metallic element or oxide thereof and 5 to 49% of binder. The catalyst solves the problems in the prior art better, and can be used for industrial production of double bond isomerization of butene.

Description

technical field [0001] The invention relates to a catalyst for isomerization of butene double bonds, in particular to a catalyst for isomerization of 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40C07C11/08C07C5/25
Inventor 刘俊涛孙凤侠李蕾
Owner CHINA PETROLEUM & CHEM CORP