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

Method of synthesing alkyl methyl tetra hydronaphthalene using alkyl benzene and piperyene as raw material

A technology of alkylmethyl tetralin and piperylene, applied in chemical instruments and methods, hydrocarbons, hydrocarbons, etc., can solve problems such as high price and increase reaction complexity, and achieve simple process flow Effect

Inactive Publication Date: 2006-04-05
SINOPEC SHANGHAI PETROCHEMICAL CO LTD +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the synthesis of dialkyltetralins from dialkylbenzenes and butadiene is the relatively high price of the two raw materials
In the prior art, dialkyl tetrahydronaphthalene is synthesized by replacing dialkylbenzene with relatively low price monoalkylbenzene or substituting butadiene with relatively low price propylene, but a third kind of tetrahydronaphthalene must be added during synthesis. Raw materials to increase the carbon source, such as adding CO, the disadvantage is that the addition of a third raw material increases the complexity of the reaction

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 of synthesing alkyl methyl tetra hydronaphthalene using alkyl benzene and piperyene as raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0018] In a batch reactor with a volume of 5 liters, with stirring device and heating device, add 1.5L alkylbenzene and the catalyst of required amount, control the pressure of the reactor, and the material in the reactor is heated to the required temperature reflex. After starting the stirring, slowly add the required amount of piperylene into the reactor to carry out the alkylation reaction. The reaction start time was counted from the time piperylene was added, and the reaction was terminated after the required reaction time.

[0019] After the reaction product is discharged, the catalyst is separated (if the catalyst adopts Y-type molecular sieve, the separation of the catalyst is not carried out), then the reaction product is placed in the above-mentioned reactor, and the required amount of catalyst Y-type molecular sieve is added to carry out the ring-forming reaction, and the reaction is controlled. The pressure of the device and the heating temperature of the material...

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 synthesizing naphthalene alkylmethyltetrahydride from alkylbenzene and pentadiene includes alkylation reaction between C1-C5 alkylbenzene and pentadiene under existance of lewis acid or Y-type molecular sieve to obtain pentenyl alkylbenzene, and cyclizing reaction under existance of Y-type molecular sieve. Its advantages are simple process and low cost.

Description

technical field [0001] The invention relates to a method for synthesizing alkylmethyl tetrahydronaphthalene from alkylbenzene and piperylene. Background technique [0002] 2,6-dialkylnaphthalene is an important fine chemical product, and its main use is as a raw material for the manufacture of high-performance engineering plastic polyethylene naphthalate (PEN). Compared with polyester materials such as polyethylene terephthalate (PET), the fibers and films produced by PEN have more excellent thermal properties, mechanical properties, optical properties, etc. Compared with PET, the heat resistance temperature of PEN is 35-55°C higher, the tensile strength is 50% higher, and the gas barrier properties (especially carbon dioxide, oxygen and water vapor) are 5 times that of PET. Therefore, PEN is especially suitable for manufacturing Packaging materials for food and beverages, tire cords, audio and video tapes and electronic components, etc. At the same time, 2,6-dialkylnaphth...

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): C07C15/44C07C2/66C07C2/68C07C15/24C07C2/62
Inventor 曹发海房鼎业郭世卓冷志光简敏李欣欣
Owner SINOPEC SHANGHAI PETROCHEMICAL CO LTD