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Method for preparing ethylene propylene through white oil catalytic cracking

A technology for catalytic cracking and light oil, which is used in chemical instruments and methods, hydrocarbon cracking to produce hydrocarbons, molecular sieve catalysts, etc. It can solve the problems of high catalyst service temperature and low ethylene propylene yield, and achieve high acid strength and good catalytic activity. Effect

Active Publication Date: 2012-08-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is the problem of high catalyst service temperature and low yield of ethylene propylene existing in the prior art, and a new method for producing ethylene propylene by catalytic cracking of light oil is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 33.4 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour B solution into A solution, stir vigorously, and then add 29.4 grams of four Ethyl ammonium hydroxide is the template agent M. After stirring for a period of time, adjust the pH value at 11 with dilute sulfuric acid, and control the molar ratio of the sol: Si: Al: M: H 2 O=1:0.1:0.2:40, add 3.0 g of Y zeolite seed crystals, put the mixed solution in an autoclave, keep it at 150°C for 40 hours, then take it out and wash it twice, dry at 120°C for 4 hours, and bake at 550°C After 3 hours, the beta zeolite / Y zeolite intergrowth material was prepared. Quantification by XRD diffraction showed that the beta zeolite content in the intergrowth material was 46.5% and the Y zeolite content was 53.5%.

[0023] with C 4 ~C 10 Naphtha is the raw material (see Table 1 for the phy...

Embodiment 2

[0025]Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 16.7 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour B solution into A solution, stir vigorously, and then add 29.4 grams of four Ethyl ammonium hydroxide and 19.9 grams of hexamethyleneimine (the mixed template agent is denoted as M), after stirring for a period of time, adjust the pH value at 11 with dilute sulfuric acid, and control the molar ratio of the sol: Si: Al: M :H 2 O=1:0.05:0.4:40, add 3.0 g of MCM-22 seed crystals, put the mixed solution in an autoclave, keep it at 150°C for 40 hours, then take it out and wash it twice, dry at 120°C for 4 hours, Roasting for 3 hours, the beta zeolite / mordenite / MCM-22 symbiotic material was obtained, and the XRD diffraction quantification showed that the beta zeolite weight percentage content in the symbiotic material was 54.5%, the mordenite content was 12.8%, and the MCM-2...

Embodiment 3

[0028] Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 16.7 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour B solution into A solution, stir vigorously, and then add 12.2 grams of B Diamine and 19.9 grams of hexamethyleneimine (the mixed template agent is denoted as M), after stirring for a period of time, adjust the pH value at 11 with dilute sulfuric acid, and control the molar ratio of the sol: Si: Al: M: H 2 O=1:0.05:0.4:40, add 3.0 g of MCM-22 seed crystals, put the mixed solution in an autoclave, keep it at 150°C for 40 hours, then take it out and wash it twice, dry at 120°C for 4 hours, Roasting for 3 hours, the MCM-49 molecular sieve / mordenite / MCM-22 intergrowth material was prepared. Quantification by XRD diffraction showed that the mass percentage of mordenite in the intergrowth material was 61.5%, and the content of MCM-22 was 38.5%.

[0029] According to the met...

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Abstract

The invention relates to a method for preparing ethylene propylene through white oil catalytic cracking, which mainly aims at solving the problems of low catalyst activity, low ethylene propylene yield rate and high reaction temperature in the prior technologies for preparing the ethylene propylene through catalytic cracking. The method adopts a symbiotic molecular sieve as the catalyst and taking white oil comprising C4-C10 hydrocarbon as the raw material; the raw material and the catalyst contact and react to generate the ethylene propylene at the reaction temperature of 600-700 DEG C, the reaction pressure of 0.001-0.5MPa, the reaction weight space velocity of 0.1-4h<-1> and the weight ratio of water to the white oil is 1-4:1, such a technical scheme better solves the problems and can be used in the industrial production for preparing the ethylene propylene through the white oil catalytic cracking.

Description

technical field [0001] The invention relates to a method for preparing ethylene propylene by catalytic cracking of light oil. Background technique [0002] As the leader of the petrochemical industry, the ethylene propylene industry plays a pivotal role in the development of the national economy. With the development of society, the market demand for ethylene propylene in my country has increased sharply, the import volume of ethylene propylene and its downstream products has increased year by year, and the market share of domestic products is less than half. At present, the world produces more than 100 million tons of ethylene per year, mainly using naphtha (or ethane) as raw material and using steam pyrolysis technology (at a temperature of about 800°C) to produce, and its output exceeds 90% of the total output. However, steam cracking requires high reaction temperature, high energy consumption, expensive high-temperature-resistant alloy steel molecular sieve, short opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C11/02C07C4/06B01J29/80
CPCY02P20/52
Inventor 谢在库马广伟肖景娴任丽萍徐建军
Owner CHINA PETROLEUM & CHEM CORP