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Catalyst for producing propylene, ethane through catalytic cracking olefin

A catalytic cracking and catalyst technology, applied in the field of ethylene catalyst and olefin catalytic cracking to produce propylene, can solve the problems of easy coking and deactivation of the catalyst, poor hydrothermal stability of the catalyst at high temperature, etc., to reduce the hydrogen transfer reaction, improve the conversion rate of raw materials, The effect of increasing the reaction temperature

Active Publication Date: 2007-02-21
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 catalyst for the production of 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

[0032]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.

[0033] 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 hou...

Embodiment 2～14

[0036] implement

[0037] Note: the rare earth content of the above-mentioned examples is calculated based on its oxide.

Embodiment 15

[0039] time (hours)

[0040] Catalyst deactivation is mainly caused by carbon formation, and the catalyst can be regenerated by simple air scorching the catalyst and its reactivity can be basically restored.

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PUM

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Abstract

A catalyst for preparing propene or ethene from olefin by catalytic cracking with high high-temp hydrothermal stability and no coking is proportionally prepared from the ZSM-5 molecular sieve whose mole ratio of SiO2 to Al2O3 is 20-800, RE oxide, and phosphorus oxide as modifier.

Description

technical field [0001] The invention relates to a catalyst for producing propylene and ethylene by catalytic cracking of olefins, in particular to a catalyst for producing propylene and ethylene by catalytic cracking of olefins with carbon four or more. 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,...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/65C07C4/06C07C4/10C07C11/04C07C11/06
CPCY02P20/52
Inventor 谢在库金文清滕加伟
Owner CHINA PETROLEUM & CHEM CORP
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