Catalytic conversion method for lowering benzene content of benzene-rich gasoline component

A catalytic conversion method and benzene content technology, applied in the field of petroleum refining, can solve the problems of low reaction pressure, high reaction temperature, low mass ratio of benzene-rich gasoline components to methanol, etc., and achieve improved life, good stability, and improved The effect of utilization

Active Publication Date: 2014-04-16
CHINA PETROCHEMICAL CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of this invention is to provide a kind of catalytic conversion method that reduces the benzene content of benzene-rich gasoline components, to solve the existing problem of making the benzene-rich gasoline components and methanol generation alkylation reaction to reduce the benzene content in the benzene-rich gasoline components Various problems caused by excessively high reaction temperature, excessively low reaction pressure, and excessively low mass ratio of benzene-rich gasoline components to methanol in the method

Method used

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  • Catalytic conversion method for lowering benzene content of benzene-rich gasoline component
  • Catalytic conversion method for lowering benzene content of benzene-rich gasoline component

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preparation example Construction

[0016] The preparation method of catalyst used in the present invention, for the catalyst that does not contain modifying element oxide, prepare according to the following steps: 1. earlier HZSM-5 type molecular sieve, HY type molecular sieve (do not add as not using), Hβ type molecular sieve ( Do not add if not in use), add water and concentrated nitric acid to the binder, and mix evenly to form a paste. ②Through shaping and processing, obtain strips or spherical objects. The bar is cylindrical, the length is generally 2 to 5mm, and the cross-sectional diameter is generally 1.5 to 2mm; the spherical thing is spherical, and the diameter is generally 1 to 3mm (the shape and size of the finished catalyst are the same as the described bar or spheres are the same). ③Dry the strips or spherical objects at a temperature of 90-120°C for 4-12 hours. ④ Baking at a temperature of 500-600°C for 1-6 hours. ⑤Aging treatment with water vapor at a temperature of 500-600 °C for 1-6 hours, ...

Embodiment 1

[0029] The HZSM-5 type molecular sieve that the dry weight is 275 grams, the silicon-aluminum ratio is 30 and the alumina that the dry weight is 225 grams, 160 grams of deionized water and 15 grams of concentrated nitric acid (concentration is 65w%, following examples are the same (1) after being uniformly mixed into a paste, extruded into strips on a molding machine. Thereafter, the strips were dried at a temperature of 120° C. for 4 hours, and then fired at a temperature of 600° C. for 3 hours. Then, aging treatment in the steam aging device for 4 hours; during aging treatment, the aging temperature is 550°C, and the weight hourly space velocity of water vapor is 1.0h -1 . After the aging treatment, the catalyst A is prepared; the content of the HZSM-5 molecular sieve is 55.0w%, and the rest is alumina.

Embodiment 2

[0031] Mix the HZSM-5 molecular sieve with a dry basis weight of 454 grams and a silicon-aluminum ratio of 500 with alumina with a dry basis weight of 46 grams, 160 grams of deionized water and 15 grams of concentrated nitric acid to form a paste, and then put it on the molding machine Squeeze into strips. Thereafter, the strips were dried at a temperature of 90° C. for 12 hours, and then fired at a temperature of 500° C. for 6 hours. Then, aging treatment in a steam aging device for 6 hours; during aging treatment, the aging temperature is 600 ° C, and the weight hourly space velocity of water vapor is 0.5h -1 . After the aging treatment, the catalyst B is prepared; the content of the HZSM-5 molecular sieve is 90.8w%, and the rest is alumina.

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Abstract

The invention discloses a catalytic conversion method for lowering the benzene content of a benzene-rich gasoline component, and aims to solve various problems caused by excessively high reaction temperature, excessively low reaction pressure and excessively low mass ratio of the benzene-rich gasoline component and methanol in a conventional method for lowering the benzene content of the benzene-rich gasoline component by performing alkylation reaction on the benzene-rich gasoline component and methanol. According to the method, the weight flow ratio of the benzene-rich gasoline component and methanol is 2.0 to 10.0, the reaction temperature is 300 to 375 DEG C, the reaction pressure is 0.8 to 3.0 MPa, the weight hourly space velocity of liquid is 1.0 to 5.0 h<-1>, a catalyst consists of 55 to 91 weight percent of HZSM-5 type molecular sieve, 0 to 25 weight percent of HY type molecular sieve, 0 to 25 weight percent of Hbeta type molecular sieve, 0 to 15 weight percent of oxide of a modifying element and 9 to 45 weight percent of adhesive, and the modifying element is phosphorus, iron, magnesium, silver, a rare earth element or zinc.

Description

technical field [0001] The invention belongs to the field of petroleum refining, and relates to a catalytic conversion method for reducing the benzene content of benzene-rich gasoline components, in particular to an alkylation reaction between benzene-rich gasoline components and methanol to reduce benzene-rich gasoline components. Method for catalytic conversion of benzene content. Background technique [0002] In recent years, the number of automobiles has continued to increase, which has caused serious air pollution in cities in industrialized countries. The pollution of automobile exhaust to the environment has become the primary source of pollution in cities. In order to control environmental pollution, countries have successively promulgated vehicle exhaust emission standards. The key to achieving vehicle exhaust emission standards is to improve the quality of vehicle fuel oil. For this reason, since the 1970s, the United States, Western Europe, Japan and other major...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G29/22B01J29/80
Inventor 毛继平郝代军韩海波魏小波刘丹禾刘雪芬郭玉涛任潇航沈方峡俞安平
Owner CHINA PETROCHEMICAL CORP
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