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Catalytic synthesis of AMS cyclic dimer 1,3,3-trimethyl-1-phenyl indane

A technology of cyclic dimer and phenyl indane, applied in the field of AMS cyclic dimer 1, can solve the problems of low yield and high reaction temperature, achieve low production cost, simple process, and improve economic benefits and social effect of benefit

Inactive Publication Date: 2002-12-11
EAST CHINA NORMAL UNIV
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  • 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, generally 120-180°C, volatile solvents such as chloroform and ether are used in the reaction, and the yield is lower, which is 70-94%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Add 0.5g (CH 3 CH 2 CH 2 ) 3 NHBF 4 -NH 4 BF 4 The catalyst is added in an amount of 2.1% of the total weight of the reaction materials. Under the condition of constant stirring, 25 ml of α-methylstyrene is slowly added, and the reaction temperature is controlled between 25°C and 35°C. After the feeding is completed, the temperature of the reaction system rises to 55-60°C and reacts for 5 minutes. After the reaction is completed, cool down and separate the catalyst and the product AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane , the catalyst can be used repeatedly, the product is white crystal, the yield is 95% confirmed by GC-MS analysis, and the conversion rate of raw material is 100%.

Embodiment 2

[0014] Add 1.0 g (CH 3 CH 2 CH 2 CH 2 ) 3 NHCl-FeCl 3 The catalyst is added in an amount of 4.2% of the total weight of the reaction materials. Under the condition of constant stirring, 25 ml of α-methylstyrene is slowly added, and the reaction temperature is controlled between 25°C and 35°C. After the feeding is completed, the temperature of the reaction system rises to 55-60°C and reacts for 5 minutes. After the reaction is completed, cool down and separate the catalyst and the product AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane , the catalyst can be used repeatedly, the product is white crystal, the yield is 96.5% confirmed by GC-MS analysis, and the conversion rate of the raw material is 100%.

Embodiment 3

[0016] Add 2.5g (CH 3 CH 2 ) 3 NHCl-AlCl 3 The catalyst is added in an amount of 10.5% of the total weight of the reaction materials. Under the condition of constant stirring, 25 ml of α-methylstyrene is slowly added, and the reaction temperature is controlled between 25°C and 35°C. After the feeding is completed, the temperature of the reaction system rises to 95-98°C and reacts for 5 minutes. After the reaction is completed, cool down and separate the catalyst and the product AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane , the catalyst can be used repeatedly, the product is white crystal, the yield is 96.5% confirmed by GC-MS analysis, and the conversion rate of the raw material is 100%.

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Abstract

The present invention belongs to the field of chemical technology. During the catalytic synthesis of AMS cyclic dimer 1,3,3-trimethyl-1-phenyl indane, alpha-methyl styrene is used as raw material andammonium salt type ionic liquid R3NHX-MaXb is used as catalyst, where R is C2-C10 alkyl or aryl, HX is inorganic acid or organic acid and MaXb is inorganic acid or organic acid salt. The catalyst amount accounts for 2-25 wt% of total material and reaction temperature is controlled in 25-100 deg.c. After finishing the reaction, the reacted mixture is cooled, settled and separated to obtain the product. The production process has mild reaction condition, low cost, no volatilization of organic solvent and other advantages.

Description

technical field [0001] The invention relates to a catalytic synthesis method of AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane, or 1,1,3-trimethyl-3-phenylindane, synthesized by organic chemistry [0002] technology field. Background technique [0003] α-Methylstyrene (AMS) can undergo oligomerization reaction under acidic conditions to generate AMS linear dimer 2,4-diphenyl-1-methyl-1-pentene and 2,4-diphenyl -1-methyl-2-pentene, AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane and AMS trimer 2,4,6-trimethyl-4, 6-Dimethyl-1-hexene, etc. Among these products, the AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane can be widely used as a material for synthesizing lubricating oil, as a molecular weight regulator in polymer synthesis, as a retarder Intermediates of fuel FR1808, plasticizers for plastics and rubber, processing modifiers, etc. Background Art Catalytic synthesis of AMS cyclic dimer 1,3,3-trimethyl-1-phenylindane mostly uses activated clay, tol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C13/465
Inventor 单永奎戴立益蔡清海何鸣元
Owner EAST CHINA NORMAL UNIV
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