Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for preparing 2,4-di-tert.-butyl phenol alkylating solution

A technology of di-tert-butylphenol alkane and phenol, which is applied in the field of intermediate manufacture of 2.4-di-tert-butylphenol, can solve the problems of low conversion rate, high production cost, and low content of 2.4-di-tert-butylphenol. achieve the effect of increasing the conversion rate

Inactive Publication Date: 2007-03-28
圣莱科特精细化工(上海)有限公司 +1
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many production methods for 24 alkylation liquid, but most of them have low conversion rate, that is, the content of 2.4-di-tert-butylphenol in 24 alkylation liquid is relatively low, generally around 77% to 82%, and the material loss is large. high production cost

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
  • Method for preparing 2,4-di-tert.-butyl phenol alkylating solution
  • Method for preparing 2,4-di-tert.-butyl phenol alkylating solution
  • Method for preparing 2,4-di-tert.-butyl phenol alkylating solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add the specified amount of phenol and catalyst activated clay according to the ratio of phenol: activated clay = 1: 0.02, then pass into isobutylene according to the ratio of phenol: activated clay: isobutene = 1: 0.02: 1.22, and control the reaction temperature at 85 ± 1 °C for the alkylation reaction. After passing through the alkenes, keep the reaction for 0.5 hours, and then remove the catalyst by filtration to obtain 24 alkylated liquid, the content of 2.4-di-tert-butylphenol is 85.92% after analysis.

[0015] Described alkylation equation is:

[0016]

Embodiment 2

[0018] Add the specified amount of phenol and catalyst active clay according to the ratio of phenol: activated clay = 1: 0.06, then pass into isobutylene according to the ratio of phenol: activated clay: isobutene = 1: 0.06: 1.15, and control the reaction temperature at 83 ± 1 °C for the alkylation reaction. After passing through the alkenes, keep the reaction for 1.0 hour, and then remove the catalyst by filtration to obtain 24 alkylated liquid, the content of 2.4-di-tert-butylphenol is 86.37% after analysis.

[0019] Described alkylation equation is:

[0020]

Embodiment 3

[0022] Add the specified amount of phenol and catalyst active clay according to the ratio of phenol: activated clay = 1: 0.05, then pass into isobutylene according to the ratio of phenol: activated clay: isobutene = 1: 0.05: 1.19, and control the reaction temperature at 83 ± 1 °C for the alkylation reaction. After passing through the alkenes, keep the reaction for 1.0 hour, and then remove the catalyst by filtration to obtain 24 alkylated liquid, the content of 2.4-di-tert-butylphenol is 87.05% after analysis.

[0023] Described alkylation equation is:

[0024]

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 relates to a 2, 4-di-ter-butyl phenol alkylating liquor preparing method, weighing phenol in the ratio of phenol to catalyst 1 to 0.01-0.1 and fully mixing the phenol with the catalyst, then adding in isobutylene in the ratio of phenol to isobutylene 1 to 1.10-1.30, and controlling the reacting temperature to be at 70DEG C-90DEG C, making alkylation reaction, finishing charging alkene and keeping temperature for 0.10-1.00 h, filtering out the catalyst, and obtaining 2, 4-di-ter-butyl phenol alkylating liquor. As compared with the technique, it has characters of low cost, high yield, etc.

Description

technical field [0001] The invention relates to the technical field of intermediate production of 2.4-di-tert-butylphenol, in particular to a method for preparing an intermediate 2.4-di-tert-butylphenol alkylation solution of 2.4-di-tert-butylphenol. Background technique [0002] Phenol and isobutene undergo an alkylation reaction under the action of a slightly acidic catalyst to generate 2.4-di-tert-butylphenol alkylation liquid, referred to as 24 alkylation liquid. 24 Alkylation liquid is the intermediate of 2.4-di-tert-butylphenol, and the product of 2.4-di-tert-butylphenol can be obtained through rectification and purification. This product is an important intermediate in the manufacture of certain plastic antioxidants. [0003] At present, there are many production methods for 24 alkylation liquid, but most of them have low conversion rate, that is, the content of 2.4-di-tert-butylphenol in 24 alkylation liquid is relatively low, generally around 77% to 82%, and the ma...

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): C07C39/06C07C37/14
CPCY02P20/52
Inventor 严光明
Owner 圣莱科特精细化工(上海)有限公司
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