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

A kind of preparation method of dodecene

A technology of dodecene and ethylene, applied in the field of preparation of dodecene, to achieve the effect of high application value

Active Publication Date: 2016-05-25
CHINA PETROLEUM & CHEM CORP +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is currently no information on the cross-metathesis reaction of contacting ethylene with internal olefins to give the dodecene

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
  • A kind of preparation method of dodecene
  • A kind of preparation method of dodecene
  • A kind of preparation method of dodecene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Under inert atmosphere, be 4500:1 according to the mol ratio of 2-octene and ruthenium catalyst, the 2-octene of 4.13ml is dissolved in 26ml toluene, the catalyzer of 5mg ruthenium catalyst A [catalyst formula I structure, wherein R 2 for H, R 1 is phenyl, M is metal ruthenium, X 1 and x 2 is chlorine, L 2 is tricyclohexylphosphine, L 1 For 1,3-bis-(2,4,6,-trimethylphenyl)-2-(tetrahydroimidazolyl)] dissolved in 20ml of toluene. The reaction device adopts a 100ml autoclave reaction device. Heat the autoclave to 80°C, vacuumize and replace it with ethylene several times, open the vent valve, then quickly add 2-octene into the reaction kettle, and then add the ruthenium catalyst into the reaction kettle. Then close the vent valve, pre-mix and stir for 2 minutes, set the pressure at 0.5 MPa, feed ethylene into it for reaction, and the reaction time is 30 minutes. After the reaction is completed, the liquid phase product is collected, measured and then chromatographica...

Embodiment 2

[0034]Under an inert atmosphere, according to the mol ratio of 2-octene and ruthenium catalyst is 9000:1, the 2-octene of 8.26ml is dissolved in 42ml toluene, the catalyzer of 5mg ruthenium catalyst A (catalyst formula I structure, wherein R 2 for H, R 1 is phenyl, M is metal ruthenium, X 1 and x 2 is chlorine, L 2 is tricyclohexylphosphine, L 1 1,3-bis-(2,4,6-trimethylphenyl)-2-(tetrahydroimidazolyl)) is dissolved in 50ml of toluene, and the reaction device adopts a 500ml autoclave reaction device. The starting temperature of the reaction is 30° C., and the rest are the same as in Example 1. The test reaction results are as follows: dodecene selectivity: 45.3%, 2-octene conversion rate: 62%, 1-heptene and carbadodecene total selectivity: 67.71%, catalyst activity: 1.26×10 6 g / mol·Ru·h.

Embodiment 3

[0036] Experimental method is the same as embodiment 1, and the reaction time is changed into 10min, and all the other experimental conditions are constant, and test reaction result is as follows: dodecene selectivity: 42.16%, 2-octene transformation rate: 57%, 1-heptene and Total selectivity of carbadodecene: 58.09%, catalyst activity: 1.13×10 6 g / mol·Ru·h.

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 preparing dodecylene. The method comprises the step of carrying out cross-metathesis reaction on ethylene and isomerised olefins in a contact manner in the presence of a catalyst, so as to obtain dodecylene, wherein the catalyst comprises a compound shown in the formula I. The method disclosed by the invention has high selectivity and conversion ratio. Dodecylene which is relatively high in carbon number can be prepared under the condition of relatively short reaction time by controlling the reaction temperature; the reaction condition is easy to control and easy to operate; and a main by-product is 1-heptylene, and also has relatively high application value. The formula I is as shown in the specification.

Description

technical field [0001] The invention relates to a method for preparing dodecene, in particular to a method for preparing dodecene by cross-metathesis reaction of ethylene and internal olefins. Background technique [0002] Dodecene can be used as a basic raw material for synthetic detergents, a raw material for synthetic plasticizers, and other chemical products and fine chemical products. At present, dodecene is mostly produced by ethylene oligomerization. Oligomerization of ethylene produces a wide variety of olefins. [0003] At present, the method for producing olefins based on metathesis reaction, such as Chinese patent CN101048356A, discloses a method for producing propylene by metathesis of ethylene and 2-butene. The process of separating 2-butene and then metathesis reacting 2-butene with ethylene to form propylene in the presence of a metathesis catalyst. International patent WO2005040077A2 invented a method for synthesizing unsaturated alcohols. The invention p...

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): C07C11/02C07C2/30C07C2/36B01J31/12
Inventor 韩春卉吴红飞张立超栗同林郑明芳刘珺祁彦平
Owner CHINA PETROLEUM & CHEM CORP