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

Method for preparing propylene from pentene and ethylene

A technology of pentene and ethylene, applied in chemical instruments and methods, hydrocarbon production by metathesis reaction, molecular sieve catalyst, etc., can solve problems such as low conversion rate of pentene, and achieve the effect of improving reaction activity and increasing dispersion.

Active Publication Date: 2015-06-10
CHINA PETROLEUM & CHEM CORP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is the low conversion rate of pentene existing in the prior art, and a new method for producing propylene from pentene and ethylene is provided

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 preparing propylene from pentene and ethylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] WO X Synthesis of / MSU

[0021] Weigh 20 g of stearyl polyoxyethylene ether, heat and stir to make it completely dissolved in 370 ml of deionized water to obtain a clear solution. Adjust the pH value to 3.7 with hydrochloric acid solution, stir for 3 hours, then add 16 ml of ethyl orthosilicate, stir for 48 hours and then put it into the reaction kettle. The crystallization temperature range during the synthesis process is 120 ° C, and the crystallization time for 48 hours. After taking it out, it is filtered, washed, and dried, and the temperature rises from room temperature to 550°C at a rate of 1°C / min in an air atmosphere, and the product is obtained after roasting at 550°C for 3 hours. The obtained crystal is MSU as measured by an X-ray diffractometer. .

[0022] Weigh 0.63 grams of ammonium metatungstate and put it into a beaker, add 20 grams of deionized water, pour it into an evaporating dish evenly after dissolving, and place it under an infrared lamp, stir ...

Embodiment 2

[0025] WO X Synthesis of / MSU

[0026] According to the various steps in Example 1, only 1.13 grams of ammonium metatungstate was changed, and the prepared catalyst was recorded as WUS-2, and its evaluation conditions and results are shown in Table 2.

Embodiment 3

[0028] WO X Synthesis of / MSU

[0029] According to the various steps in Example 1, only 3.01 grams of ammonium metatungstate was changed, and the prepared catalyst was recorded as WUS-3, and its evaluation conditions and results are shown in Table 2.

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The present invention relates to a method for preparing propylene from pentene and ethylene, wherein the problem of low pentene conversion rate in the prior art is mainly solved with the present invention. The technical scheme comprises that pentene and ethylene are adopted as raw materials, and pass through a catalyst bed layer at a reaction temperature of 300-400 DEG C under a reaction pressure of 0-3 MPa at a pentene weight space velocity of 1-20 h<-1> to produce propylene, wherein the catalyst comprises, by weight, a) 5-30 parts of at least a metal oxide selected from W, Mo and Re, and b) 70-95 parts of a MSU molecular sieve carrier. With the technical scheme, the problem is well solved, and the method can be used for industrial production of preparation of propylene from pentene and ethylene.

Description

technical field [0001] The present invention relates to a method for producing propylene from pentene and ethylene. Background technique [0002] Olefin disproportionation is a conversion process of olefins. Under the action of a transition metal compound catalyst, the C=C double bond in the olefin is broken and re-formed to obtain a new olefin product. For example, the following formula can be used to represent the disproportionation of olefins: [0003] [0004] Utilizing the disproportionation of pentene, relatively excess C with low added value can be 5 Olefin feedstock is converted into high value-added propylene products, and olefin disproportionation catalyst is the key to realize this process. [0005] US5898091 and US6166279 reported C 4 、C 5 Olefin handling. In the process of olefin disproportionation to propylene, the catalyst used is Re 2 o 7 / Al 2 o 3 , the reactor is a moving bed. [0006] US5300718 has reported the process of producing propylene ...

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): C07C11/06C07C6/04B01J29/03
CPCY02P20/52
Inventor 宣东滕加伟刘苏
Owner CHINA PETROLEUM & CHEM CORP