Method of preparing propylene from ethylene and butylene

A technology of butene and ethylene, applied in chemical instruments and methods, metathesis reaction for hydrocarbon production, metal/metal oxide/metal hydroxide catalysts, etc. Effect

Active Publication Date: 2014-04-23
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 low molar selectivity of the tar

Method used

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  • Method of preparing propylene from ethylene and butylene
  • Method of preparing propylene from ethylene and butylene

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] 【Example 1】

[0022] Weigh 500 grams of commercial MgO, add 2.5 liters of deionized water, heat and stir the resulting white turbid solution at 80°C for 5 hours, filter the water in the solution with suction, and dry the product at 120°C for 6 hours to obtain a magnesium oxide carrier.

[0023] Mix 200 grams of carrier magnesia and 1% scallop powder and put them into the blender evenly. After stirring for 12 minutes, add 19 grams of ammonium dimolybdate, then add 250 grams of deionized water, knead, extrude, and dry at 550 The catalyst was prepared by calcining at ℃ for 4 hours, which was designated as SL-1.

[0024] The evaluation of the catalyst was carried out on an olefin disproportionation evaluation device, and the raw materials were 60% butene-1 and 40% 2-butene in terms of mass fraction. The reaction is at a temperature of 300°C, a pressure of 3 MPa in absolute pressure, a molar ratio of ethylene to butene of 2:1 and a weight space velocity of butene of 4.8 hou...

Example Embodiment

[0026] [Example 2]

[0027] Weigh 500 grams of commercial MgO, add 2 liters of deionized water, and heat and stir the obtained white turbid solution at 60°C for 4 hours, then let it stand for 2 hours, filter the water in the solution, and dry the product at 120°C for 4 hours to obtain the magnesium oxide carrier .

[0028] Mix 200 grams of carrier magnesia and 1% scallop powder and put them into the blender evenly. After stirring for 30 minutes, add 24 grams of ammonium dimolybdate, then add 150 grams of deionized water, knead, extrude, and dry at 550 The catalyst was prepared by calcining at ℃ for 4 hours, which was designated as SL-2.

[0029] The evaluation of the catalyst was carried out on an olefin disproportionation evaluation device. The reaction was carried out at a temperature of 350°C, a pressure of 2.5 MPa in absolute pressure, a molar ratio of ethylene to butene of 3:1 and a weight space velocity of butene of 6 hours. -1 The evaluation was carried out under the ...

Example Embodiment

[0031] [Example 3]

[0032] Weigh 500 grams of commercial MgO, add 1.5 liters of deionized water, and heat and stir the obtained white turbid solution at 100°C for 2 hours, then let it stand for 2 hours, filter the water in the solution, and dry the product at 100°C for 8 hours to obtain a magnesium oxide carrier .

[0033] Mix 200 grams of carrier magnesia and 1% scallop powder and put them into the blender evenly. After stirring for 20 minutes, add 48 grams of ammonium dimolybdate, then add 180 grams of deionized water, knead, extrude, and dry at 550 The catalyst was prepared by calcining at ℃ for 4 hours, which was designated as SL-3.

[0034] The evaluation of the catalyst was carried out on an olefin disproportionation evaluation device. The reaction was carried out at a temperature of 250°C, a pressure of 1 MPa in absolute pressure, a molar ratio of ethylene to butene of 4:1 and a weight space velocity of butene of 2 hours. -1 The evaluation was carried out under the c...

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Abstract

The invention relates to a method of preparing propylene from ethylene and butylenes, mainly solving a problem of the low propylene molar selectivity in the prior art. According to the technical scheme adopted by the method, the ethylene and the butylene are adopted as raw materials, and the raw materials are contacted with a catalyst and reacted in a fixed-bed reactor to produce a propylene-containing effluent at 200-450 DEG C under 0-5 MPa (based on absolute pressure) at a weight space velocity of 1-10 h<-1> with the molar ratio of the ethylene to the butylene being 1-5, wherein the catalyst comprises following components by weight: a) 5-50 parts of molybdenum oxide and b) 50-95 parts of a magnesium oxide carrier. By the technical scheme, the problem is solved well and the method can be used in industrial production of the propylene from the ethylene and the butylene.

Description

technical field [0001] The present invention relates to a process for producing propylene from ethylene and butene. Background technique [0002] 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 propylene, so the research and development of olefin disproportionation to propylene technology is not only to improve the production of propylene, but also to promote low value-added C 4 The comp...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C6/04B01J23/28
CPCY02P20/52
Inventor 滕加伟宣东刘苏肖永厚
Owner CHINA PETROLEUM & CHEM CORP
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