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

A kind of preparation method of 2-cumyl-4-tertoctylphenol

A technology of tert-octyl phenol and p-tert-octyl phenol is applied in the field of preparation of substituted phenol, can solve the problems of complicated post-processing process, incapable of recycling the catalyst, unfavorable environmental protection and the like, and achieves simple operation, high conversion rate of raw materials, Good product selection

Active Publication Date: 2017-08-11
RIANLON +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, the catalyst cannot be recycled, the post-treatment process is complicated, and a large amount of acid- and alkali-containing wastewater will be produced, which is not conducive to environmental protection.

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

Embodiment 1

[0016] Put 206.4g of tert-octylphenol and 20.6g of strong acidic cation exchange resin AMBERLYST 15DRY into the reactor, raise the temperature to 90-95°C, add 94.6g of α-methylstyrene dropwise for 8 hours, after the addition is completed Continue the reaction at 90-95° C. for 2 hours. After the reaction is completed, the strong acidic cation exchange resin is recovered by filtration, and the filtrate is rectified to obtain 2-cumyl-4-tertoctylphenol. The filtrate gas chromatography analysis content: 2-cumyl-4-tetraoctylphenol 73.4%, p-tetraoctylphenol 22.5%, α-methylstyrene 0.18%, 2,6-dicumyl-4-tetraoctylphenol Phenol 0.06%; α-methylstyrene conversion rate 99.4%; 2-cumyl-4-tertoctylphenol selectivity 99.9%.

Embodiment 2

[0018] Put 206.4g of tert-octylphenol and 10.3g of strongly acidic cation exchange resin AMBERLYST 35DRY into the reactor, raise the temperature to 120-125°C, add 47.3g of α-methylstyrene dropwise for 4 hours, after the dropwise addition is completed After the reaction is completed, the strongly acidic cation exchange resin is recovered by filtration, and the filtrate is rectified to obtain 2-cumyl-4-tertoctylphenol. The filtrate gas chromatography analysis content: 2-cumyl-4-tetraoctylphenol 37.8%, p-tetraoctylphenol 60.0%, α-methylstyrene 0.12%, 2,6-dicumyl-4-tetraoctylphenol Phenol 0.12%; α-methylstyrene conversion rate 99.4%; 2-cumyl-4-tertoctylphenol selectivity 99.7%.

Embodiment 3

[0020] Put 206.4g of p-tert-octylphenol and 2.1g of strong acidic cation exchange resin AMBERLYST 36DRY into the reactor, raise the temperature to 135-140°C, add 70.9g of α-methylstyrene dropwise, the dropwise time is 4 hours, after the dropwise addition is completed Continue the heat preservation reaction at 135-140° C. for 1 hour. After the reaction is completed, the strong acidic cation exchange resin is recovered by filtration, and the filtrate is rectified to obtain 2-cumyl-4-tertoctylphenol. The filtrate gas chromatography analysis content: 2-cumyl-4-tetraoctylphenol 62.3%, p-tetraoctylphenol 35.3%, α-methylstyrene 0.06%, 2,6-dicumyl-4-tetraoctylphenol Phenol 0.58%; α-methylstyrene conversion rate 99.8%; 2-cumyl-4-tertoctylphenol selectivity 99.1%.

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 preparation method of 2-cumyl-4-tert-octylphenol. The preparation method comprises the following steps: adding tert-octylphenol and a strongly-acidic cation exchange resin into a reactor, and heating to 90-140 DEG C; dropwisely adding alpha-methyl styrene; after the dropwise addition, continuing keeping the temperature at 90-140 DEG C to react; and after the reaction finishes, filtering to recover the strongly-acidic cation exchange resin, and rectifying the filtrate to obtain the 2-cumyl-4-tert-octylphenol. The preparation method is simple to operate. The catalyst can be separated from the reaction system only by simple filtration without acid washing, alkali washing, water washing or any other step capable of easily generating wastewater, and thus, is more environment-friendly. The raw material conversion rate is high, and the alpha-methyl styrene conversion rate can reach 99% or above. The product selectivity is high, and the 2-cumyl-4-tert-octylphenol selectivity is 99% or above. The catalyst can be repeatedly used and regenerated, and is suitable for industrialized clean production.

Description

technical field [0001] The invention belongs to a preparation method of substituted phenols, in particular to a preparation method of 2-cumyl-4-tertoctylphenol. Background technique [0002] 2-cumyl-4-tertoctylphenol is a key intermediate in the synthesis of UV absorber UV-928 (CAS No. 73936-91-1). UV absorber UV-928 is a new type of hydroxybenzotriazole, which is suitable for UV absorber of high-performance coatings. The product has broad absorption characteristics and can effectively protect coatings and other photosensitive materials. At the same time, this product has the characteristics of high solubility, high temperature resistance and environmental durability, and is especially suitable for systems that require high temperature curing, such as powder coatings, coil coatings, etc. It is more ideal to be used in combination with hindered amine light stabilizers , The compound formula can provide better protection for the paint, including preventing the paint from dis...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C07C37/14C07C39/15
CPCC07C37/14C07C39/15
Inventor 范小鹏李海平孙春光汤翠祥
Owner RIANLON
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