Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Supported catalyst with mesoporous structure, and preparation method and application thereof

A supported catalyst, mesoporous structure technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrocarbon production from halogen-containing organic compounds, etc. To achieve the effect of simple preparation method, improved selectivity and high product selectivity

Active Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, in the existing literature on the conversion of methyl halides, the target products are mainly methanol and dimethyl ether, in addition to acetic acid, high-carbon hydrocarbons, ethylene and propylene, and in the technology with olefins as the target product, the product is mostly ethylene. , propylene, and the selectivity of a single product is not high, and no relevant reports have been found on the synthesis of isobutene with high selectivity from methyl bromide

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Supported catalyst with mesoporous structure, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Measure 100mL of ethanol as a solvent, add 3.8g of P123 and stir to dissolve it, weigh 9.6g of aluminum isopropoxide and 5.4mL of concentrated nitric acid into the solution, stir at room temperature until dissolved, add zirconium nitrate, and stir at 30°C for 8 hours; The obtained samples were aged at 70°C for 36 hours and calcined at 650°C for 6 hours to obtain modified mesoporous alumina. An aqueous solution containing zinc nitrate was prepared, loaded on an alumina carrier by an equal volume impregnation method, aged at room temperature for 4 hours, dried at 100°C for 8 hours, and calcined at 500°C for 4 hours to obtain a catalyst precursor. Use a continuous flow fixed-bed reactor to treat the catalyst precursor under a mixed atmosphere, wherein the volume content of methyl bromide is 30%, and the balance is nitrogen, and the treatment conditions are 230°C, 0.1MPa, 100h -1 , the time is 4h. Prepared methyl halide to produce isobutylene catalyst, by weight, ZnBr 2 c...

Embodiment 2

[0027] Measure 100mL of ethanol as a solvent, add 4.1g of P123 and stir to dissolve it, weigh 10g of aluminum isopropoxide and 6.1mL of concentrated nitric acid into the solution, stir at room temperature until dissolved, add zirconium nitrate, and stir at 40°C for 6h; The sample was aged at 60°C for 48h and calcined at 500°C for 10h to obtain modified mesoporous alumina. An aqueous solution containing zinc nitrate was prepared, loaded on an alumina carrier by an equal volume impregnation method, aged at room temperature for 4 hours, dried at 100°C for 8 hours, and calcined at 500°C for 4 hours to obtain a catalyst precursor. Use a continuous flow fixed-bed reactor to treat the catalyst precursor under a mixed atmosphere, wherein the volume content of methyl bromide is 30%, and the balance is nitrogen, and the treatment conditions are 230°C, 0.1MPa, 100h -1 , the time is 4h. Prepared methyl halide to produce isobutylene catalyst, by weight, ZnBr 2 content is 30%, ZnO content...

Embodiment 3

[0030] Measure 100mL of ethanol as a solvent, add 4.6g of P123 and stir to dissolve it, weigh 7.9g of aluminum isopropoxide and 4.8mL of concentrated nitric acid into the solution, stir at room temperature until dissolved, add zirconium nitrate, and stir at 50°C for 5h; The obtained samples were aged at 70°C for 48 hours and calcined at 650°C for 6 hours to obtain modified mesoporous alumina. An aqueous solution containing zinc nitrate was prepared, loaded on an alumina carrier by an equal volume impregnation method, aged at room temperature for 4 hours, dried at 100°C for 8 hours, and calcined at 500°C for 4 hours to obtain a catalyst precursor. Use a continuous flow fixed-bed reactor to treat the catalyst precursor under a mixed atmosphere, wherein the volume content of methyl bromide is 30%, and the balance is nitrogen, and the treatment conditions are 230°C, 0.1MPa, 100h -1 , the time is 4h. Prepared methyl halide to produce isobutylene catalyst, by weight, ZnBr 2 conten...

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

The invention discloses a supported catalyst with a mesoporous structure, and a preparation method and application thereof. The catalyst comprises, by weight, 0.5 to 20% of zinc oxide, 10 to 50% of zinc halide and 0.1 to 20% of a modification aid, with the balance being a modified mesoporous alumina carrier. The preparation method for the catalyst comprises the following steps: (1) preparing the modified mesoporous alumina carrier; (2) loading an active metal zinc precursor on the carrier obtained in the step (1) by using an equivalent-volume impregnation manner and carrying out drying and roasting so as to prepare a catalyst precursor; and (3) subjecting the catalyst precursor prepared in the step (2) to halogenation so as to prepare the catalyst for preparation of isobutene from halogenated methane. The catalyst is capable of obviously improving selectivity of isobutene when used for a reaction for preparation of isobutene from bromomethane.

Description

technical field [0001] The invention relates to a supported catalyst with a mesoporous structure and its preparation method and application, in particular to a catalyst for preparing isobutylene from methyl halide and its preparation method and application, more specifically to a mesoporous structure Methyl halide to isobutylene catalyst and its preparation method and application. Background technique [0002] Isobutene is an important basic organic chemical raw material. Its derivative products are numerous, the upstream and downstream industrial chains are complicated, and the consumption structure shows a trend of diversification. A variety of high value-added products can be prepared from isobutylene, such as: butyl rubber, polyisobutylene, methyl tert-butyl ether, isoprene and organic glass and other organic chemical raw materials and fine chemical products. As the market scale of isobutene downstream products continues to expand, the contradiction between supply and d...

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): B01J27/138C07C1/26C07C11/09
Inventor 张信伟张舒冬李杰孙晓丹倪向前尹泽群刘全杰张喜文
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com