Process for preparing ethylene, propylene and aromatic hydrocarbons by C4 alkene catalytic conversion

A technology for catalytic conversion and olefins, which is applied in chemical instruments and methods, hydrocarbon cracking to produce hydrocarbons, and bulk chemical production, etc.

Active Publication Date: 2009-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And each major refinery produces a considerable amount of C 4 Olefins, affected by the substitution of natural gas for liquefied petroleum gas and transportation costs, their utilization value is low

Method used

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  • Process for preparing ethylene, propylene and aromatic hydrocarbons by C4 alkene catalytic conversion
  • Process for preparing ethylene, propylene and aromatic hydrocarbons by C4 alkene catalytic conversion
  • Process for preparing ethylene, propylene and aromatic hydrocarbons by C4 alkene catalytic conversion

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preparation example Construction

[0013] The preparation method of the catalyst of the present invention comprises mixing HZSM-5 and silicon dioxide uniformly at a mass ratio of 0.8 to 14:1, adding silica sol and kneading, molding, drying, and roasting to obtain the catalyst, and the catalyst is heated at 400 to 800 ° C. Carry out water vapor treatment, then impregnate the catalyst after water vapor treatment with polysiloxane or polysiloxane aqueous solution, dry and roast.

[0014] In the above method, when the catalyst is molded, the HZSM-5 and silicon dioxide are firstly mixed evenly, and preferably 1-3% of the total mass of the mixture is added to the extrusion aid Selina powder. Then add silica sol to the mixture and knead. The content of silicon dioxide in the silica sol is preferably 10-75% by mass. The kneaded material is extruded into strips, dried, pelletized, and calcined to obtain the catalyst. This catalyst is treated with water vapor, and the mass ratio of water vapor and catalyst passing throu...

example 1

[0025] Prepare the silicon-modified catalyst described in the present invention.

[0026] (1) Preparation of catalyst

[0027] Get 14.0 grams of HZSM-5 with a silica / alumina molar ratio of 65, 16.0 grams of silica powder and 0.8 gram of scallop powder and mix evenly, add 36.0 grams of silica sol with a silica content of 20% by mass (Fushun Petroleum Three Catalyst Factory) and kneaded, then extruded, dried at 120°C for 4 hours, pelletized, and calcined at 550°C for 3 hours to obtain the catalyst.

[0028] The catalyst was treated with water vapor at 600°C for 10 hours, and the mass space velocity of water vapor passing through the catalyst was 3.0 hours during the treatment -1 .

[0029] (2) Silicon modification treatment

[0030] The catalyst after the above-mentioned steam treatment was impregnated at 25°C for 4 hours with a polyaminopropylsiloxane (Shandong Luyang Chemical Factory) cyclohexane solution with a concentration of 10 mass%, and the liquid / solid volume ratio w...

example 2

[0032] Prepare silicon-modified catalyst by the method for example 1, difference is (1) the consumption of silica powder in the step is 5.0 grams, and silica sol add-on is 10.3 grams, and the content of silica in silica sol is 10 mass %, (2) The solid impregnated with the cyclohexane solution of polyaminopropylsiloxane was roasted at 550°C for 4 hours, and the prepared silicon-modified catalyst A 2 The composition is shown in Table 1.

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Abstract

The invention relates to a method for preparing ethylene, propylene and fragrant with C4 olefin, comprising contact reaction between C4 olefin with silicon-modified catalyst under condition of 470-600 Deg. C and 0.1-1.0 MPa, said catalyst including HZSM-5 of 30-80% by weight, adhesive agent SiO2 of 10-65% by weight and SiO2 for modifying surface of 3-15% by weight. The invention is characterized by higher productivity and more dimethylbenzene content in produced fragrant.

Description

technical field [0001] The present invention is a C 4 Process for the catalytic conversion of olefins. Specifically, a C 4 Process for the catalytic conversion of olefins to ethylene, propylene and aromatics. Background technique [0002] In recent years, the market demand for ethylene and propylene has increased, especially the annual growth rate of propylene demand has exceeded that of ethylene, and will continue to rise for a long time. In addition, aromatics such as benzene, toluene and xylene, especially p-xylene, which is an important basic chemical raw material, mainly come from catalytic reforming and aromatics joint production units. At present, with the large-scale development of the economy, domestic aromatic resources are also in short supply. And each major refinery produces a considerable amount of C 4 Olefins, affected by the substitution of natural gas for liquefied petroleum gas and transportation costs, have low utilization value. Therefore, it is nec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C4/04C07C5/22C07C11/04C07C11/06C07C15/00C07C15/08B01J29/40B01J37/02B01J37/10
CPCY02P20/52
Inventor 刘爱松王建伟张昕钟进姚志龙高俊魁胡健
Owner CHINA PETROLEUM & CHEM CORP
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