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

Method for oligomerizing isobutylene

A technology for isobutene and olefin, which is applied in the production of liquid hydrocarbon mixtures, petroleum industry, etc., can solve the problems of easy deactivation, high operating cost, difficult separation of reaction products and catalysts, etc., and achieves the effect of high catalytic activity and selectivity

Inactive Publication Date: 2013-02-20
SHAANXI HI TECH ENERGY DEV
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Homogeneous catalysts have high activity and selectivity, but there are problems such as difficult separation of reaction products and catalysts, environmental pollution by solvents used in the reaction, and high operating costs; heterogeneous catalysts have high oligomerization activity and product selectivity , but easily deactivated

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

[0015] Mix triethylamine hydrochloride, anhydrous aluminum chloride and n-heptane evenly, raise the temperature to 150°C and keep it for 6 hours to prepare the ionic liquid. Put 300mL of ionic liquid into the reactor, add 200mL of n-hexane, stir at a speed of 1000r / min, raise the temperature to 40°C, add 50mL of isobutylene, stir at a speed of 1000r / min for 10 minutes, release the pressure, and collect all exhaust. After testing, it was found that the conversion rate of isobutene was 80%, and C in the product 8 The content is 25.34%, C 12 The content is 50.43%.

Embodiment 2

[0017] Mix triethylamine hydrochloride, anhydrous aluminum chloride and n-heptane evenly, raise the temperature to 150°C and keep it for 6 hours to prepare the ionic liquid. Put 400mL of ionic liquid into the reaction kettle, add 200mL of n-hexane, stir at a speed of 13000r / min, raise the temperature to 40°C, add 50mL of isobutylene, stir at a speed of 13000r / min for 30 minutes, release the pressure, and collect all exhaust. After testing, it was found that the conversion rate of isobutene was 85%, and C in the product 8 The content is 22.87%, C 12 The content is 51.43%.

Embodiment 3

[0019] Mix triethylamine hydrochloride, anhydrous aluminum chloride and n-heptane evenly, raise the temperature to 150°C and keep it for 6 hours to prepare the ionic liquid. Put 400mL of ionic liquid into the reaction kettle, add 200mL of n-hexane, stir at a speed of 13000r / min, raise the temperature to 40°C, add 50mL of isobutene, stir at a speed of 13000r / min for 50 minutes, release the pressure, and collect all exhaust. After testing, it was found that the conversion rate of isobutene was 86%, and C in the product 8 The content is 21.67%, C 12 The content is 53.76%.

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 method for oligomerizing isobutylene, particularly a method for preparing ring-free olefin with only one C=C double bond from hydrocarbon with smaller carbon atom number. The method comprises the following steps: adding an ionic liquid into a reaction kettle, adding n-hexane, starting stirring, heating, adding 50mL of isobutylene, stirring for some time, relieving the pressure, and collecting all exhaust gas. The invention has the advantages of high catalytic activity and high selectivity; the oligomerized liquid-phase product only contains dimer, trimer, tetramer and pentamer of isobutylene, and does not contain any cracked product.

Description

technical field [0001] The present invention relates to a method for preparing acyclic olefins with only one carbon-carbon double bond from hydrocarbons containing less carbon atoms. Background technique [0002] The oligomerization of low-carbon olefins is one of the important chemical processes in oil refining and organic chemical industry. The oligomerization products of butene are important chemical raw materials, which can be used to produce oligomerized gasoline and diesel oil, and can also be used as detergents, additives, etc. Important intermediates for plastics, additives and pesticides. Therefore, the oligomerization reaction of butene and its technological process have attracted more and more attention. [0003] Butene oligomerization catalysts mainly include Ziegler-type homogeneous catalysts, solid phosphoric acid catalysts, zeolite molecular sieve catalysts, and heterogeneous catalysts such as supported catalysts. Homogeneous catalysts have high activity...

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 Applications(China)
IPC IPC(8): C10G50/00
Inventor 王耀斌
Owner SHAANXI HI TECH ENERGY DEV