ZSM-5 molecular sieve catalyst for catalytic preparation of xylene from coked benzene and methanol and use thereof

A ZSM-5, methanol preparation technology, applied in molecular sieve catalyst, physical/chemical process catalyst, organic chemistry and other directions, can solve the problems of low xylene selectivity, low economic benefit, low industrial production use, etc. The effect of high stability, high effective conversion rate and high selectivity

Active Publication Date: 2015-09-02
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
4 Cites 18 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, in these two patents, the former only proposes a process method, but does not discuss in detail the key technology catalyst, and its product is mainly toluene, the economic benefit is relatively low, and the industrial production use...
View more

Method used

The present invention is by the research to Bronsted acid center catalyzed method principle, has selected suitable acidic molecular sieve catalytic material in laboratory synthesis, and adopts basic metal oxide as modifier to carry out molecular sieve modification process, substantially eliminated The strong acid sites on the surface of molecular sieves have obtained the above-mentioned SM-5 molecular sieve catalysts that can catalyze the alkylation of methanol coking benzene to produce xylene, and developed a new reaction process that uses the above catalysts to catalyze the alkylation reaction of coking benzene and methanol to produce xylene. The research results show that: under the conditions of using CO2 as the reaction medium, the reaction temperature is 420°C, the molar ratio of benzene/toluene/methanol is 1.05/0.95/2, the pressure is 1.0MPa, and the reaction space velocity WHSV2.0h-1, the two The product selectivity of toluene is above 80%, the single-pass reaction conversion rate of benzene is about 40%, and the single-pass conversion rate of methanol reaches 100%. The toluene forme...
View more

Abstract

The invention provides a ZSM-5 molecular sieve catalyst for catalytic preparation of xylene from coked benzene and methanol and a use thereof. A preparation method of the ZSM-5 molecular sieve catalyst comprises blending 45-90wt% of a hydrogen-type ZSM-5 molecular sieve, 10-50wt% of a binder, 1-20wt% of sesbania cannabina powder and a dilute nitric acid solution as an assistant by stirring to obtain a uniform mixture, drying and roasting the mixture, extruding the mixture to obtain a strip, immersing the strip in a solution containing one or two of Mg, Zn, Gd, P, La, Ce, Mo and Ni, and carrying out drying and roasting so that the strip is loaded with the metals. In catalytic alkylation reaction preparation of xylene from coked benzene and methanol, the ZSM-5 molecular sieve catalyst has high catalytic activity, high stability, a high raw material effective conversion rate and high desired product xylene selectivity, improves the existing xylene production technology, improves a coal-derived coked benzene utilization rate and realizes change of waster into valuables.

Application Domain

Molecular sieve catalystsHydrocarbon by hydrocarbon and non-hydrocarbon condensation +1

Technology Topic

CoalMethanol +10

Examples

  • Experimental program(7)
  • Effect test(1)

Example Embodiment

[0022] Example 1. An efficient catalyst for catalyzing the alkylation reaction of coked benzene and methanol
[0023] Take Na 2 O content is less than 0.05wt%, SiO 2 /Al 2 O 3 16 grams of hydrogen type ZSM-5 molecular sieve powder with a molar ratio of 30, add 8.5g of alumina as a binder and 0.35g of sesame powder, mix and stir uniformly and extrude into shape, dry and roast, cut into pellets, and use analytical pure lanthanum nitrate The aqueous solution is excessively impregnated, dried, and calcined to obtain catalyst A.

Example Embodiment

[0024] Example 2. An efficient catalyst for catalyzing the alkylation reaction of coked benzene and methanol
[0025] Take Na 2 O content is less than 0.05wt%, SiO 2 /Al 2 O 3 19.35g of hydrogen type ZSM-5 molecular sieve powder with a molar ratio of 60, add 10.2g of binder alumina and 0.45g of sesame powder, mix and stir uniformly and extrude into shape, dry and roast, cut into pellets, use analytical pure cerium nitrate Excessive immersion, drying, and roasting in the aqueous solution of TiO2 to prepare catalyst B.

Example Embodiment

[0026] Example 3. An efficient catalyst for catalyzing the alkylation reaction of coked benzene and methanol
[0027] Take Na 2 O content is less than 0.05wt%, SiO 2 /Al 2 O 3 19.35g of hydrogen type ZSM-5 molecular sieve powder with a molar ratio of 80, add 10.2g of binder alumina and 0.45g of sesame powder, mix and stir uniformly and extrude into shape, dry and roast, cut into pellets, use analytical pure cerium nitrate And lanthanum nitrate mixture aqueous solution is excessively impregnated, dried and roasted to prepare catalyst C.

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Preparation method and application of Cu-MOF catalyst in acetylene hydrochlorination reaction

PendingCN113210019AIncrease dispersionHigh catalytic activity and stability
Owner:ZHEJIANG UNIV OF TECH

AgPdIr nano-alloy and preparation and use method thereof

ActiveCN111180750AHigh catalytic activity and stabilityImprove discharge voltage and energy efficiency
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Catalyst for synthesizing vinyl acetate with acetylene process, preparation method and vinyl acetate synthesizing method

InactiveCN105944757AHigh catalytic activity and stability
Owner:SHIHEZI UNIVERSITY

Catalytic wet oxidation treatment method of garbage leachate

InactiveCN107698055ASimple processHigh catalytic activity and stability
Owner:FOSHAN UNIVERSITY

Classification and recommendation of technical efficacy words

  • Improve effective conversion rate
  • High catalytic activity and stability

Player consumption potential-based game prop pushing method and device

ActiveCN108090800AImprove effective conversion rate
Owner:ZHUHAI KINGSOFT ONLINE GAME TECH CO LTD +1

Catalyst for degrading hydrogen peroxide as well as preparation method and application of catalyst

ActiveCN104785254AHigh catalytic activity and stabilitymild reaction conditions
Owner:XIAN CATALYST NEW MATERIALS CO LTD

Nickel-based composite catalyst for methane reforming with carbon dioxide to produce synthesis gas under pressurization

ActiveCN108620079Aremove surface carbonHigh catalytic activity and stability
Owner:SHAANXI NORMAL UNIV

Catalytic wet oxidation treatment method of garbage leachate

InactiveCN107698055ASimple processHigh catalytic activity and stability
Owner:FOSHAN UNIVERSITY

Catalyst for synthesizing vinyl acetate with acetylene process, preparation method and vinyl acetate synthesizing method

InactiveCN105944757AHigh catalytic activity and stability
Owner:SHIHEZI UNIVERSITY

AgPdIr nano-alloy and preparation and use method thereof

ActiveCN111180750AHigh catalytic activity and stabilityImprove discharge voltage and energy efficiency
Owner:NORTHWESTERN POLYTECHNICAL UNIV
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