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Method for preparing propylene through C4 disproportionation

A technology of propylene and disproportionation, which is applied in chemical instruments and methods, hydrocarbon cracking to produce hydrocarbons, organic chemistry, etc. It can solve the problems of low activity of ethylene or catalysts, and achieve the effects of increasing yield, increasing yield, and reducing poisonous effects

Active Publication Date: 2012-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is the problem of ethylene consumption or low catalyst activity existing in the prior art, and a new method for producing propylene by carbon four-disproportionation is provided

Method used

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  • Method for preparing propylene through C4 disproportionation
  • Method for preparing propylene through C4 disproportionation
  • Method for preparing propylene through C4 disproportionation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of disproportionation catalyst: put 20 kg of chromatography silica gel and 2 kg of Tianqing powder into a kneader, stir for a period of time, add 2.9 kg of active components of ammonium metatungstate and 1.5 kg of silica sol, and add a certain amount of Ionized water, after stirring for 30 minutes, put it into the extruder and extrude the strips to obtain the finished product. After drying, the catalyst WO was calcined in an air atmosphere 3 / SiO 2 , the calcination temperature is 550° C., the calcination time is 4 hours, and the prepared active component is 12 parts by weight.

[0023] In the fixed bed reactor, the composition of the reaction raw material C4 is 37.5% butane, 5.4% butene-1 and 57.1% butene-2, the reaction temperature is 360°C, the reaction pressure is 0.7MPa, the C4 Mass space velocity is 7 hours -1 . The evaluation results of the catalysts are shown in Table 1.

Embodiment 2

[0025] According to the various steps in Example 1, changing the active component is 1.4 kilograms of ammonium metatungstate and 2.1 kilograms of ammonium dimolybdate, the weight ratio of tungsten oxide and molybdenum oxide in the obtained catalyst is 1, the weight of active component The number of copies is 12, and the evaluation results are shown in Table 1.

Embodiment 3

[0027] According to each step in embodiment 1, change the active component to be 1.4 kilograms of ammonium metatungstate and 1.2 kilograms of ammonium perrhenate, the weight ratio of tungsten oxide and molybdenum oxide in the obtained catalyst is 1, the weight of active component The number of parts is 12 parts, the reaction temperature is changed to 480°C and the reaction pressure is 0.2MPa, and the mass space velocity of C4 is 8 hours -1 , and the evaluation results are shown in Table 1.

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Abstract

The invention relates to a method for preparing propylene through C4 disproportionation and mainly solves the problems of the past technologies such as the consumption of ethylene and low catalyst activity. In the technical scheme in the method, C4 is used as the raw material and the method comprises the following step: under the conditions that the reaction temperature is 300-520 DEG C, the reaction pressure is 0-2MPa and the weight space velocity is 1-10h<-1>, the raw material passes through a catalyst bed to generate propylene. The catalyst used in the method comprises the following components in parts by weight: 4-30 parts of at least one of tungsten oxide, molybdenum oxide and rhenium oxide and 70-96 parts of SiO2 carrier. By adopting the technical scheme, the problems can be better solved and the method can be used in the propylene industrial production adopting C4 disproportionation.

Description

technical field [0001] The invention relates to a method for producing propylene by carbon four-disproportionation. Background technique [0002] In recent years, with the continuous economic development of the third world countries, the market demand for light olefins (including ethylene, propylene, etc.) will continue to increase. Propylene is one of the most important basic organic raw materials second only to ethylene, and its largest use is to produce polypropylene (accounting for about half of its total), followed by the production of acrylonitrile, propylene oxide, isopropanol, and cumene , carbonyl alcohols, acrylic acid, propylene oligomers. [0003] The traditional methods of ethylene co-production and refinery recovery of propylene are obviously difficult to meet the growing demand for propylene. The use of olefin disproportionation technology can digest C without reducing the cracking severity of naphtha. 4 Distillate, and can increase the production of propyle...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C6/04C07C4/06B01J23/30B01J23/28B01J23/36
CPCY02P20/52
Inventor 宣东王仰东刘苏
Owner CHINA PETROLEUM & CHEM CORP
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