Heavy arenes catalytic dealkylation catalyst and preparing method thereof

A catalytic dealkylation and catalyst technology for aromatic hydrocarbons, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of catalyst loading and reaction operation control complexity, etc., to improve activity stability and reduce carbon deposition The effect of reducing and increasing productivity

Inactive Publication Date: 2004-02-04
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, this method is relatively cumbersome in ter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0019] The preparation method of the catalyst of the present invention includes:

[0020] (1) The sodium-type ZSM-5 zeolite, β zeolite, and hydrated alumina are mixed uniformly in a dry basis weight ratio, and then kneaded, shaped, and calcined to obtain a composite carrier.

[0021] (2) Perform ion exchange on the composite carrier with an aqueous ammonium salt solution to make the sodium ion exchange degree in the carrier at least 90%, and then wash,

[0022] (3) Prepare an impregnating solution with a compound of a group VIII metal to impregnate the carrier after the ammonium exchange, dry and calcinate.

[0023] The step (1) of the above method is the preparation of the composite carrier, which is to mix sodium-type ZSM-5 zeolite and β zeolite with hydrated alumina in a predetermined ratio, and then add 25-60%, preferably 35-45% of the weight of the mixed powder. A nitric acid aqueous solution with a concentration of 1 to 5% by weight, preferably 1.5 to 3.0% by weight, is knea...

Example

[0030] Examples 1~6

[0031] The catalyst of the present invention is prepared.

[0032] (1) Preparation of composite carrier

[0033] The appropriate amount of sodium-type ZSM-5 zeolite (produced by Shanghai No. 7 Plant, with a sodium content of 0.4-0.6% by weight), sodium-type β zeolite (with a sodium content of 0.4-0.6% by weight) and HP hydrogen prepared by the method described in CN 85100218 Alumina powder is mixed, a nitric acid aqueous solution with a powder weight of 40% and a concentration of 2% is added, kneaded, extruded, dried at 110-120°C for 2 hours, and calcined in air at 550°C for 4 hours to prepare a composite carrier.

[0034] (2) Ammonium exchange

[0035] Take 10 grams of the above composite carrier and use 0.5N NH at 90±10℃ 4 Perform ion exchange on the carrier with 20 ml of Cl solution for 2 hours, filter, and wash with deionized water until there is no Cl - .

[0036] (3) Introduce metal components

[0037] Prepare a predetermined am...

Example Embodiment

[0042] Example 7

[0043] The catalysts A to F of the present invention and the comparative catalysts were evaluated.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A catalyst for catalytic dealkylation of heavy arylhydrocarbon contains the metal in VIII family and composite carrier including ZSM-5 zeolite, beta-zeolite and alumina. It can increase the transform rate of C9 acrylhydrocarbon and output rate of xylene, and decrease carbon deposit.

Description

technical field [0001] The invention relates to a heavy aromatic hydrocarbon catalytic dealkylation catalyst and a preparation method thereof. Specifically, it is a catalyst containing aluminosilicate zeolite and noble metal components, which is suitable for catalytic dealkylation of heavy aromatics with more than nine carbon atoms for lightening to produce benzene, toluene and xylene (BTX) and its preparation method. Background technique [0002] Heavy aromatics generally refer to catalytic reforming, disproportionation and isomerization reactions to generate oil and C contained in ethylene cracking hydrogenated gasoline 9 ~C 16 mono- and bicycloalkylaromatics. Heavy aromatics resources have not been rationally utilized for a long time, except for a small amount used as solvent and extraction of C 9 or C 10 Except for monomeric aromatics, they are basically blended into fuel for use. With the increasing improvement of environmental regulations, the content of heavy ar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J29/04C07C4/18
Inventor 王建伟刘中勋梁战桥金星花李艳秀桂寿喜
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap