Unlock instant, AI-driven research and patent intelligence for your innovation.

Catalyst for producing m-cresol through isomerization of o-cresol and preparation method of catalyst

A catalyst, o-cresol technology, applied in the field of molecular sieves, can solve the problems of high energy consumption, incapable of large-scale industrial production, complex catalyst recovery, etc.

Active Publication Date: 2021-09-07
SHANXI UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"Tianjin Chemical Industry" (the first issue in 1994) reported that the cresol isomerization reaction was carried out with HCl-AlCl3 as a catalyst to obtain mixed cresols with a m-cresol content of 68%, but due to This method adopts batch production, the recovery of catalyst is complicated, the energy consumption is large, and it cannot be produced in a large scale.

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
  • Catalyst for producing m-cresol through isomerization of o-cresol and preparation method of catalyst
  • Catalyst for producing m-cresol through isomerization of o-cresol and preparation method of catalyst
  • Catalyst for producing m-cresol through isomerization of o-cresol and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] SiO of ZSM-5 molecular sieve raw powder 2 / Al 2 o 3 The molar ratio is 200, and the following modification method is adopted: the original powder of ZSM-5 molecular sieve is firstly treated with CaCl with a concentration of 0.1mol / L 2 Aqueous solution exchange modification, CaCl 2 The liquid-solid volume ratio of the aqueous solution to the ZSM-5 molecular sieve raw material is 5:1, and the treatment temperature is 80°C for 2 hours to obtain the Ca-ZSM-5 molecular sieve. Its XRD and SEM see figure 1 , figure 2 .

[0021] Mix Ca-ZSM-5 molecular sieve, silica sol, 1 wt% of the Ca-ZSM-5 molecular sieve and silica sol dry weight of scallop powder, knead, extrude, dry at 100°C for 5h, and roast at 550°C for 4h. Get a catalyst. Based on the catalyst weight, the content of Ca-ZSM-5 molecular sieve is 70%, and the rest is silicon oxide.

[0022] o-cresol isomerization to prepare m-cresol isomerization reaction, the raw material used is the toluene solution of o-cresol ...

Embodiment 2

[0026] SiO of ZSM-5 molecular sieve raw powder 2 / Al 2 o 3 The molar ratio is 400, and the following modification method is adopted: the original powder of ZSM-5 molecular sieve is firstly treated with CaCl with a concentration of 0.1mol / L 2 Aqueous solution exchange modification, CaCl 2 The liquid-solid volume ratio of the aqueous solution to the ZSM-5 molecular sieve raw material is 5:1, and the treatment temperature is 80°C for 2 hours to obtain the Ca-ZSM-5 molecular sieve. Its XRD and SEM see image 3 , Figure 4 .

[0027] Mix Ca-ZSM-5 molecular sieve, silica sol, 1 wt% of the Ca-ZSM-5 molecular sieve and silica sol dry weight of scallop powder, knead, extrude, dry at 100°C for 5h, and roast at 550°C for 4h. Get a catalyst. Based on the catalyst weight, the content of Ca-ZSM-5 molecular sieve is 70%, and the rest is silicon oxide.

[0028] The reaction evaluation was carried out according to the reaction conditions described in Example 1, and the reaction evaluat...

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 catalyst for producing m-cresol through isomerization of o-cresol, a preparation method of the catalyst and an application of the catalyst in the process of preparing the m-cresol through isomerization of the o-cresol. The catalyst comprises a Ca-ZSM-5 molecular sieve and a binder, and based on the weight of a dry basis of the catalyst, the content of the Ca-ZSM-5 molecular sieve is 60 wt%-90 wt%, and the content of the binder is 10 wt%-40 wt%. Compared with an existing technical process for preparing the m-cresol, the catalyst disclosed by the invention has the advantages of high selectivity of the m-cresol, few side reaction products and good stability in the reaction for preparing the m-cresol by isomerization of the o-cresol, and the catalytic process is more environment-friendly compared with the existing process.

Description

technical field [0001] The invention belongs to the field of molecular sieves, and in particular relates to a catalyst for isomerizing o-cresol to produce m-cresol, a preparation method and application thereof. Background technique [0002] The hydroxyl group, methyl group and benzene ring of cresol can all react to form a series of derivatives. It is an important raw material for fine chemicals and is mainly used in key fields such as pesticides, medicines, dyes, spices, and antioxidants. With the development of domestic industrialization, the output of m-cresol has been seriously in short supply, and a large amount of m-cresol needs to be imported every year to maintain the operation of the industrial system. This has caused foreign m-cresol manufacturers to dump domestically, seriously affecting domestic m-cresol The production environment of phenol enterprises. [0003] At present, the methods for preparing m-cresol include chemical synthesis methods such as natural sep...

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): B01J29/40C07C37/00C07C39/07
CPCB01J29/40C07C37/00B01J2229/186C07C39/07Y02P20/52
Inventor 吉向飞赵晓强曲令多
Owner SHANXI UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com