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Method for producing propylene by disproportionation of butene and ethylene

A technology of ethylene and butene, applied in chemical instruments and methods, catalyst activation/preparation, catalysts, etc., can solve the problems of poor catalyst stability and achieve the effect of enhanced stability and increased specific surface area

Active Publication Date: 2014-10-15
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 problem of poor catalyst stability in the process of preparing propylene by butene disproportionation in the prior art, and a new method for preparing propylene by butene disproportionation is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Weighed 1g of lithium hydroxide to make a solution, weighed 20g of magnesium oxide and mixed it, stirred at 70°C for 10h, dried the product obtained after suction filtration at 70°C for 10h, and then calcined at 500°C for 6h. The obtained product was designated as JT-1. The specific surface area and surface basic site concentration of oxides are shown in Table 1.

Embodiment 2

[0031] Weigh 5g of sodium carbonate to make a solution, weigh 20g of magnesium oxide and mix it, add 0.1g of auxiliary copper oxide, stir at 40°C for 15h, and dry the product obtained after suction filtration at 40°C for 16h, then mix with 3g of activated carbon Mix and impregnate, dry and bake at 800°C for 3h. The obtained product was designated as JT-2. The specific surface area and surface basic site concentration of oxides are shown in Table 1.

Embodiment 3

[0033] Weigh 8g of potassium nitrate to make a solution, weigh 20g of calcium oxide and mix it, add 0.8g of additive zinc oxide, stir at 120°C for 5h, and dry the product obtained after suction filtration at 100°C for 6h, then mix with 2g of SiO 2Mix and impregnate, dry and bake at 350°C for 10h. The resulting catalyst product is designated as JT-3. The specific surface area and surface basic site concentration of oxides are shown in Table 1.

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PUM

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Abstract

The invention relates to a method for preparing propylene through disproportionation of butene and ethylene, which mainly solves the problem of poor stability existing in the previous technology. In the present invention, carbon tetraolefins and ethylene are used as raw materials, the reaction temperature is 200-450°C, the reaction pressure is 0-5MPa in absolute pressure, and the weight space velocity is 1-50 hours -1, the raw materials pass through the catalyst bed. layer to generate the target product propylene, in which the catalyst used is a mixed catalyst composed of a tungsten-loaded disproportionation catalyst and an alkaline earth metal isomerization catalyst. The mass ratio of the two mixed is 1:1 to 1:15. The technical solution is better. This problem is solved and can be used for the industrial production of propylene through disproportionation of butene.

Description

technical field [0001] The invention relates to a method for producing propylene by disproportionation of butene and ethylene. Background technique [0002] Olefin disproportionation is a process in which the C=C double bond in the olefin is broken and re-formed under the action of a transition metal compound catalyst to obtain a new olefin product. [0003] Utilizing the cross-disproportionation effect of butene and ethylene, by adding an appropriate amount of ethylene, the relatively excess and low added value C 4 Olefin raw materials are converted into high value-added propylene products. [0004] The butene raw materials used in the disproportionation reaction often come from steam cracking or catalytic cracking units, and contain a small amount of water, oxygen-containing compounds, sulfur-containing compounds, etc. Among them, the oxygen-containing compounds are mostly alcohols or ethers. These compounds are easy to combine with the empty orbitals of the metal atoms ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/06C07C6/04B01J23/30B01J29/78B01J29/03
CPCY02P20/52C07C6/04C07C2523/30C07C2521/10B01J23/30B01J29/045B01J23/002B01J23/888B01J37/04B01J35/617B01J35/615C07C11/06
Inventor 董静刘苏王仰东
Owner CHINA PETROLEUM & CHEM CORP