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Method for producing propylene by virtue of disproportionating of amylene

A technology of pentene and propylene, which is applied in the field of pentene disproportionation to produce propylene, which can solve the problem of low conversion rate of pentene and achieve the effect of improving the conversion rate

Active Publication Date: 2015-05-13
CHINA PETROLEUM & CHEM CORP +1
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  • 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 by disproportionation of pentene is provided

Method used

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  • Method for producing propylene by virtue of disproportionating of amylene
  • Method for producing propylene by virtue of disproportionating of amylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Add 1 kg of silica gel and 10 grams of scallop powder into the blender and stir for 45 minutes. After kneading evenly, add 400 grams of silica sol and 113 grams of ammonium metatungstate. At the same time, add 1 kg of deionized water, knead, squeeze, dry, and then Calcined at 550° C. for 4 hours to obtain a pale yellow finished catalyst with a tungsten oxide content of 8%. The evaluation of the catalyst is carried out on the olefin disproportionation evaluation device. The raw materials are pentene and ethylene. The reaction is at a temperature of 285 ° C, a pressure of 0.5 MPa, and a weight space velocity of pentene of 4 hours. -1 Under the conditions of evaluation, the evaluation results are shown in Table 1, denoted as SL-1.

Embodiment 2

[0023] According to each step among the embodiment 1, only changing ammonium metatungstate is 56.5 grams, and the loading capacity of the catalyst tungsten oxide that makes is 4%, and reaction temperature is 250 ℃, reaction pressure is 0.2MPa and weight empty in changing reaction conditions 1 hour -1 , the evaluation results are shown in Table 1, recorded as SL-2.

Embodiment 3

[0025] According to each step among the embodiment 1, only changing ammonium metatungstate is 301 grams, and the loading capacity of the catalyst tungsten oxide that makes is 20%, and in changing reaction condition, reaction temperature is 270 ℃, reaction pressure is 0.4MPa and weight is empty 2 hours -1 , the evaluation results are shown in Table 1, recorded as SL-3.

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Abstract

The invention relates to a method for producing propylene by virtue of disproportionating of amylene, and the method is mainly used for solving the problem of low amylene conversion rate in the prior art. The technical scheme adopted by the invention is as follows: amylene and ethylene used as raw materials are contacted with a catalyst to react so as to generate an effluent containing propylene in a fixed bed reactor under the conditions that the reaction temperature is 250-350 DEG C, the reaction pressure metered by absolute pressure is 0-1MPa and the WHSV (Weight Hourly Space Velocity) is 1-20h<-1>, wherein the catalyst contains 1-30 parts by weight of tungsten oxide and 70-99 parts by weight of SiO2 carrier, so that the problem is well solved. The method can be used in industrial production of producing propylene by virtue of disproportionating of amylene.

Description

technical field [0001] The invention relates to a method for producing propylene by disproportionation of pentene. Background technique [0002] Olefin disproportionation is a conversion process of olefins. Under the action of the 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

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06C07C6/04B01J23/30
CPCY02P20/52
Inventor 宣东刘苏董静
Owner CHINA PETROLEUM & CHEM CORP