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Method of preparing propylene and ethylene by catalytic cracking olefin

A catalytic cracking and olefin technology, which is applied in the production of bulk chemicals, hydrocarbon cracking, organic chemistry, etc., can solve the problems of easy coking and deactivation of catalysts, poor high-temperature hydrothermal stability of catalysts, etc., to reduce hydrogen transfer reactions and improve Raw material conversion rate, effect of increasing contact time

Active Publication Date: 2007-03-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is that there are problems in the prior art that the catalyst has poor high-temperature hydrothermal stability and the catalyst is easily coked and deactivated, and a new method for producing propylene and ethylene by catalytic cracking of olefins is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 100 grams of NaZSM-5 molecular sieve with a molar silicon-aluminum ratio of 200, first calcined the release agent at 600°C for 4 hours under nitrogen flow, then exchanged 0.1M hydrochloric acid with 1 liter of hydrochloric acid at 80°C for three to four times, and washed with deionized water until chlorine-free Roots were dried at 120°C for later use.

[0034] 30 grams of the above molecular sieve and Ce 2 o 3 50 ml of 2.08 grams of cerium nitrate solution was heated to dryness under stirring, then dried at 120°C for 10 hours, roasted at 550°C for 2 hours, then added to a solution made of 0.86 grams of 85% phosphoric acid and 30 grams of water, mixed evenly and evaporated. Drying, drying at 120°C for 10 hours, calcining at 550°C for 2 hours and crushing. After mixing evenly with 3 grams of scallop powder, add 50 grams of 40% silica sol to make a dry paste, and after proper dehydration, extrude to form a Φ1.6. After baking at 120°C for 10 hours, bake at 550°C for 4 ho...

Embodiment 2～14

[0037] implement

[0038] Note: the rare earth content of the above-mentioned examples is calculated based on its oxide.

Embodiment 15

[0040]

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PUM

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Abstract

The present invention relates to process of catalytically cracking olefin to produce propylene and ethylene, and the process is superior to available technology, which has the problems of poor high temperature hydrothermal stability of catalyst with scaling, deactivation, etc. The technological scheme of the present invention is that C4 and C4+ olefin material is catalytically cracked to produce propylene at the reaction temperature of 450-650 deg.c, reaction pressure of -0.08 to 0.5 MPa and liquid space velocity of 0.5-15 / hr under the action of ZSM-5 molecular sieve catalyst containing RE metal and phosphorus oxide. The process may be used in industrial production of propylene through cracking olefin.

Description

technical field [0001] The invention relates to a method for producing propylene and ethylene by catalytic cracking of olefins, in particular to a method for producing propylene and ethylene by catalytic cracking of C4-C8 olefins. Background technique [0002] The demand for basic chemical raw materials such as propylene and ethylene continues to grow, while crude oil raw materials are deteriorating day by day, which has brought about increasingly prominent contradictions in the production of propylene and ethylene. On the other hand, mixed carbon four and above olefins and alkanes are by-products of ethylene plants, refinery FCC units, methanol to olefins, and gasoline units, and usually can only be used as low value-added products such as liquefied gas fuels. It is of great significance to use these olefins and alkanes raw materials for further deep processing to produce high value-added products propylene and ethylene, and to make full use ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04C07C11/06C07C4/06
CPCY02P20/52
Inventor 谢在库金文清滕加伟赵国良
Owner CHINA PETROLEUM & CHEM CORP
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