Isomerization method for n-butene

A technology for isomerization and n-butene, which is used in isomerization to produce hydrocarbons, chemical instruments and methods, and organic chemistry. isomerization and other problems, to achieve the effect of improving conversion rate, low cost and simple method

Active Publication Date: 2016-03-23
BEIJING ENERGY ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the selectivity of the reaction substrate often decreases with the increase of the acidity of the molecular sieve
And even the prior art of US5523510 that combines acid treatment and steam treatment will also cause the conversion rate and selectivity of the reaction to be all low due to the severe dealumination of molecular sieves
Therefore, the steam treatment means and / or acid treatment means conventionally used by those skilled in the art cannot obtain the catalyst with excellent performance expected by researchers, so that n-butene isomerization cannot be realized with high conversion rate and high selectivity. change

Method used

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  • Isomerization method for n-butene

Examples

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Effect test

preparation example 1

[0060] This preparation example is used to prepare the isomerization catalyst described in the present invention.

[0061] Step 1: obtain modified ferrierite.

[0062] Modification treatment: Take 90g of sodium ferrierite ZSM-23 (purchased from Shanghai Shentan Environmental Protection New Material Co., Ltd., the same below), and add it to 1000mL of a solution containing 32g of ammonium nitrate and 35.4g of ammonium fluorosilicate. Contact treatment at ℃ for 8h, then cooling, filtering, drying at 100℃ for 10h, and calcining at 500℃ for 4h to obtain modified ferrierite 1-A.

[0063] The second step: obtaining the isomerization catalyst composition.

[0064] A mixed solution of 100 g of modified Ferrierite 1-A, 50 g of alumina, 5 g of turnip powder, 8 g of nitric acid and 100 g of water was added into a kneader and stirred until the materials were evenly mixed. The isomerization catalyst composition 1-B was obtained.

[0065] The third step: preparing the isomerization cataly...

preparation example 2

[0068] This preparation example is used to prepare the isomerization catalyst described in the present invention.

[0069] Step 1: obtain modified ferrierite.

[0070] Modification treatment: Take 90g of sodium ferrierite ZSM-35 (purchased from Dalian Ketelli Chemical Co., Ltd., the same below), add it to 1000mL solution containing 55.4g ammonium nitrate and 72g ammonium fluorosilicate, at 95°C After contacting for 7 hours, cooling, filtering, drying at 120°C for 8 hours, and calcining at 400°C for 6 hours, the modified ferrierite 2-A was obtained.

[0071] The second step: obtaining the isomerization catalyst composition.

[0072] A mixed solution of 100 g of modified ferrierite 2-A, 20 g of silicon oxide, 10 g of methylcellulose, 4 g of nitric acid and 100 g of water was added into a kneader and stirred until the materials were mixed evenly. The isomerization catalyst composition 2-B was obtained.

[0073] The third step: preparing the isomerization catalyst.

[0074] Th...

preparation example 3

[0076] This preparation example is used to prepare the isomerization catalyst described in the present invention.

[0077] Step 1: obtain modified ferrierite.

[0078] Modification treatment: Take 90g of sodium ferrierite ZSM-38 (purchased from Shanghai Shentan Environmental Protection New Material Co., Ltd., the same below), and add it to 1000mL of a solution containing 9.4g of ammonium nitrate and 7.6g of ammonium fluorosilicate. Contact treatment at 75°C for 10 hours, cooling, filtration, drying at 90°C for 12 hours, and calcination at 600°C for 3 hours to obtain modified ferrierite 3-A.

[0079] The second step: obtaining the isomerization catalyst composition.

[0080] A mixed solution of 100 g of modified Ferrierite 3-A, 80 g of alumina, 1 g of turnip powder, 15 g of nitric acid and 100 g of water was added into a kneader and stirred until the materials were evenly mixed. The isomerization catalyst composition 3-B was obtained.

[0081] The third step: preparing the i...

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Abstract

The invention discloses an isomerization method for n-butene. The method comprises the steps of: under an isomerization condition, performing a fourth contact on n-butene and an isomerization catalyst, wherein the isomerization catalyst comprises modified ferrierite and the modified ferrierite is obtained by performing a first contact on unmodified ferrierite and an ammonium-containing compound under a solution condition; the ammonium-containing compound comprises ammonium nitrate and ammonium fluosilicate. The isomerization method for n-butene disclosed by the invention can remarkably improve the conversion ratio of a reaction substrate and the selectivity of a product.

Description

technical field [0001] The invention relates to a method for isomerizing n-butene. Background technique [0002] In recent years, due to the promulgation of various environmental protection policies and the promotion and use of unleaded gasoline, the demand for high-octane additives such as MTBE and ETBE has grown rapidly around the world. The dramatic increase. Coupled with the development and utilization of isobutene downstream products, the isobutene produced by traditional petroleum catalytic cracking is far from meeting the current demand. Therefore, expanding the source of isobutene and increasing the output of isobutene have become the top priority of petrochemical development. [0003] At present, methods for producing isobutene, such as sulfuric acid extraction, resin dehydration, tert-butanol dehydration, and isobutane dehydrogenation, have not been widely promoted due to environmental pollution, equipment corrosion, and conversion problems. In 1977, Snamprogetti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/09C07C5/27B01J29/70B01J29/65
Inventor 曲良龙郭贵贵吴金存石秀峰孙作霖
Owner BEIJING ENERGY ENG TECH
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