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

Method for selectively catalyst synthesizing AMS cyclic dimeric polymer and linear polymer

A dimer, linear technology, applied in the directions of hydrocarbons, hydrocarbons, chemical instruments and methods, etc., can solve the problems of low conversion rate of raw materials, low reaction yield and high reaction temperature, and achieve low production cost and simple process. , the effect of improving economic and social benefits

Inactive Publication Date: 2007-05-09
EAST CHINA NORMAL UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that the reaction temperature is higher at 120-180 ° C, volatile organic solvents such as chloroform and ether are used in the reaction, the conversion rate of raw materials and the reaction yield are low, and a catalyst is used to synthesize a product, etc.

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 selectively catalyst synthesizing AMS cyclic dimeric polymer and linear polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Selectively catalyzed synthesis of AMS cyclic dimers: the catalyst is (CH 3 CH 2 CH 2 CH 2 CH 2 ) 3 NHPF 6 -NaPF 6 , the amount of addition is 3.5g, the amount of raw material addition is 14.6g, the conversion rate of raw material is 100%, and the yield of AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane is 96.3% ; Selectively catalyzed synthesis of AMS linear dimers: the catalyst is (CH 3 CH 2 CH 2 CH 2 CH 2 ) 3 NHPF 6 NaPF 6 , the amount added is 3.5g, and the selected solvent is CH 3 CH 2 CH 2 OH, the addition amount is 6g, the addition amount of raw material is 14.6g, the conversion rate of raw material is 100%, the productive rate of AMS linear dimer 2,4-diphenyl-1-methyl-1-pentene is 92.9 %, the yield of AMS linear dimer 2,4-diphenyl-1-methyl-2-pentene was 0.6%. Two kinds of materials that the present invention relates to, catalyzer and selective solvent, its structure and quality do not change before and after reaction, and its kind can change wi...

Embodiment 2

[0018] Selectively catalyzed synthesis of AMS cyclic dimers: the catalyst is (CH 3 CH 2 CH 2 ) 3 NHPF 6 -NaPF 6 , the addition is 1g, the raw material addition is 25g, the transformation rate of raw material is 100%, the productive rate of AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane is 92.8%; Select Catalyzed synthesis of AMS linear dimer: the catalyst is (CH 3 CH 2 CH 2 ) 3 NHPF 6 -NaPF 6 , the addition amount is 1g, and the selected solvent is CH 3 CH 2 CH 2 OH, the add-on is 4g, the raw material add-on is 25g, the conversion rate of raw material is 100%, the productive rate of AMS linear dimer 2,4-diphenyl-1-methyl-1-pentene is 92.6%, The yield of AMS linear dimer 2,4-diphenyl-1-methyl-2-pentene was 0.6%. Two kinds of materials that the present invention relates to, catalyzer and selective solvent, its structure and quality do not change before and after reaction, and its kind can change within a certain range, and catalyzer can be (CH 3 CH 2 CH 2 ) 3 ...

Embodiment 3

[0020] Selectively catalyzed synthesis of AMS cyclic dimers: the catalyst is (CH 3 CH 2 ) 3 NHPF 6 -NaPF 6 , the addition is 2g, the addition of raw materials is 18g, the conversion rate of raw materials is 100%, and the productive rate of AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane is 94.5%; Select Catalytic synthesis of AMS linear dimer: the catalyst is (CH 3 CH 2 ) 3 NHPF 6 -NaPF 6 , the addition amount is 2g, and the selected solvent is CH 3 CH 2 CH 2 OH, the amount added is 3.2g, the amount of raw material added is 18g, the conversion rate of raw material is 100%, and the yield of AMS linear dimer 2,4-diphenyl-1-methyl-1-pentene is 95.3% , the yield of AMS linear dimer 2,4-diphenyl-1-methyl-2-pentene was 0.4%. Two kinds of materials that the present invention relates to, catalyzer and selective solvent, its structure and quality do not change before and after reaction, and its kind can change within a certain range, and catalyzer can be (CH 3 CH 2 ) 3 N...

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

A process for selectively and catalytically synthesizing the annular AMS dimer and linear dimer includes such steps as dripping alpha-methylstyrene as raw material into ammonium salt type ionized liquid as catalyst, stirring, heating, refluxing, synthesizing annular AMS dimer, cooling, depositing, separating to obtain annular AMS dimer 1,3,3-trimethyl-1-phenylindane or 1,1,3-trimethyl-3-phenylindane; or dripping said raw material in the mixture of ionized liquid and selective solvent, stirring, heating, refluxing, selectively synthesizing linear AMS dimer, cooling, and depositing to obtain 2,4-dimethyl-1-methyl-1-pentene, or 2,4-diphenyl-1-methyl-2- pentene. Its advantages are directional synthesis of product and high output rate (92-100%).

Description

technical field [0001] The present invention relates to a method for selectively catalyzing the synthesis of AMS cyclic dimers and linear dimers, specifically, relates to a method for selectively catalyzing the synthesis of α-methylstyrene cyclic dimers 1,3,3 - Trimethyl-1-phenylindane or 1,1,3-trimethyl-3-phenylindane with linear dimer 2,4-diphenyl-1-methyl-1-pentene and 2,4-diphenyl-1-methyl-2-pentene, which belong to the technical field of organic chemical synthesis. Background technique [0002] α-Methylstyrene (AMS) can undergo oligomerization reaction under acidic conditions to generate AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane, AMS linear dimer 2, 4-diphenyl-1-methyl-1-pentene and 2,4-diphenyl-1-methyl-2-pentene with AMS terpolymer 2,4,6-trimethyl-4, 6-Dimethyl-1-hexene, etc. AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane can be widely used as a material for synthetic lubricating oil, a molecular weight regulator in polymer synthes...

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): C07C2/04C07C2/42C07C15/50
CPCY02P20/582
Inventor 单永奎李静戴立益杨建国何鸣元
Owner EAST CHINA NORMAL UNIV