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Method for producing propylene, ethene by using catalytic cracking olefin through fluid bed

A fluidized bed catalyst and catalytic cracking technology, which is applied in the field of ethylene and fluidized bed olefin catalytic cracking to produce propylene, can solve the problems of poor hydrothermal stability, catalyst coking and deactivation, etc., achieve good mechanical strength, improve reaction performance, and high The effect of reactivity and propylene selectivity

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

[0009] The technical problem to be solved by the present invention is the problem of rapid catalyst coking and deactivation and poor hydrothermal stability in the existing olefin cracking fixed-bed reaction process, and a new fluidized catalyst for olefin catalytic cracking to produce propylene and ethylene is provided. The catalyst is used in the catalytic cracking of olefins to produce propylene and ethylene, with high reactivity and propylene selectivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Step 1: 200 grams of NaZSM-5 molecular sieve with a molar silicon-aluminum ratio of 200 (purchased from Shanghai No. Four times, washed with deionized water until free of chlorine radicals, and dried at 120°C for later use. 100 grams of the above molecular sieve and Ce 2 o 3 100 milliliters of 1.0 grams of cerium nitrate solution were mixed evenly, heated and evaporated 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 1.60 grams of 85% phosphoric acid and 100 grams of water, After mixing evenly, evaporate to dryness, then dry at 120°C for 10 hours, roast at 550°C for 2 hours, and finally pulverize.

[0034] Step 2: Add 148 grams of kaolin (15% reduction on ignition), soak in 250 grams of water for 10 minutes, then beat for 10 minutes, add 625 grams of aluminum sol (20% alumina content) and stir for 5 minutes, and add 20% nitric acid to adjust the pH value is about 3.5, finally add 250 grams o...

Embodiment 2～11

[0036] The same preparation process as in Example 1, only changing the ratio of different components, to obtain different microsphere catalysts.

[0037] Install 30 grams of catalyst in a Φ30 fluidized bed reactor to etherify C 4 Catalyst performance was evaluated at 550°C with a space velocity of WHSV of 10 hours-1, a water / olefin weight ratio of 1, and the results are listed in Table 1.

[0038]

Embodiment 12～16

[0040] implement

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PUM

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Abstract

This invention relates to a method for manufacturing propylene and ethylene by alkenes catalytic cracking in fluid bed reactor. The method comprises contacting alkenes with catalyst in a fluid bed reactor, and catalytically cracking to obtain propylene and ethylene. The catalyst uses ZSM molecular sieve 20-80 wt.% as the carrier, and rare earth oxides 0.01-6 wt.%, phosphorus oxides 0.01-6 wt.%, and binder 10-70 wt.% as the active components. The method solves the problems of quick coking inactivation and poor hydrothermal stability of the catalyst, low yield of propylene, etc., and can be used in propylene and ethylene manufacture by alkenes catalytic cracking.

Description

technical field [0001] The invention relates to a method for producing propylene and ethylene by fluidized bed olefin catalytic cracking, in particular to a method for producing propylene and ethylene by fluidized bed catalytic cracking of carbon four and above 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...

Claims

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Application Information

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IPC IPC(8): C07C11/06C07C11/04C07C4/06
Inventor 金文清滕加伟
Owner CHINA PETROLEUM & CHEM CORP
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