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Method for increasing yield of ethylene and propylene from olefin with four carbon or above

An olefin and ethylene technology, which is applied to the mixed use of composite molecular sieve and oxide, can solve the problems of low yield and low ethylene propylene selectivity, and achieve the effect of good technical effect and good catalytic cracking effect.

Active Publication Date: 2008-08-13
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of low selectivity and low yield of the target product ethylene propylene in the prior literature and technology, and a new method for increasing the production of ethylene and propylene of carbon four and above olefins is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The mixed C4 derived from FCC was used as the raw material (see Table 1 for the composition distribution) to investigate the catalytic cracking performance of the prepared catalyst for hydrocarbons.

[0027] Catalyst preparation: Take 16.2 grams of iron nitrate, 7.86 grams of cobalt nitrate, 12.23 grams of chromium nitrate, 2.4 grams of lanthanum nitrate and dissolve them in 250 milliliters of water to obtain solution A. Dissolve 4.65 g of diammonium hydrogen phosphate in 100 ml of water, pour it into solution A, and stir evenly to obtain slurry B. Heat the slurry B on a water bath at 70-80°C, add 50 grams of silica sol with a weight percentage of 40% (the same below), reflux for 5 hours, and dry the slurry into a shape with a spray drying device. The dried powder was placed in a muffle furnace and heated to 740°C, burned for 5 hours, and cooled to obtain a catalyst. The catalyst chemical formula obtained is: Fe 0.11 co 0.08 Cr 0.08 La 0.04 P 0.05 o x +SiO2 2 Ca...

Embodiment 2～6

[0033] The mixed C4 derived from FCC was used as the raw material (see Table 1 for the composition distribution) to investigate the catalytic cracking performance of the prepared catalyst for hydrocarbons.

[0034] Catalyst preparation: Take 284 grams of sodium metasilicate, dissolve it with 300 grams of distilled water to form solution A, take 16.7 grams of aluminum sulfate, and make solution B with 100 grams of distilled water, slowly pour solution B into solution A, stir vigorously, and then add 12.2 grams of ethylenediamine and 29.4 grams of tetraethylammonium hydroxide (the mixed template is denoted as M), after stirring for a while, 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 2.8 grams of zeolite beta seed crystals, put the mixed solution in an autoclave, keep it at 160°C for 40 hours, then take it out and wash it twice, dry it at 120°C for 4 hours, and bake it at 550°C After 3 hours, t...

Embodiment 7

[0041] Take 284 grams of sodium metasilicate, dissolve it into solution A with 300 grams of distilled water, take 33.3 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 24.4 grams of B Diamine, after stirring for 30 minutes, adjust the pH value at 11.5 with dilute sulfuric acid, and control the molar ratio of the sol: Si: Al: ethylenediamine: H 2 O=1:0.1:0.4:40, put the mixed solution in an autoclave, keep it at 170°C for 40 hours, then take it out and wash it twice, dry it at 120°C for 4 hours, and bake it at 550°C for 3 hours to obtain ZSM-5 Composite molecular sieve with mordenite. Use ammonium nitrate solution with a concentration of 5%, exchange twice at 70°C, then roast at 550°C, and repeat twice to prepare hydrogen ZSM-5 / mordenite composite molecular sieve.

[0042] Prepare slurry B by the method for embodiment 1, add silicon aluminum molar ratio SiO 2 / Al 2 o 3 15 ...

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Abstract

The invention relates to a method for increase production of ethylene and propylene from C4 or more alkene, which mainly solves the technology problems of the prior art, such as low selectivity and low yield of ethylene and propylene. The invention uses alkene mixtures of C4 or more alkene as materials, the alkene materials are contacted with a catalyst to generate an effluent containing ethylene and propylene, wherein the catalyst uses a carrier selected from at least one of SiO2 or compound molecular sieve, and contains a composition AaBbPcOx based on atom ratio. In this way, the invention solves the problems well and is useful in increase industrial production of ethylene and propylene.

Description

technical field [0001] The invention relates to a method for increasing the production of ethylene and propylene from C4 and above olefins, in particular to a method of using C4 and above olefins as raw materials and using composite molecular sieves and oxides in combination to realize catalytic cracking to produce ethylene and propylene. Background technique [0002] Petrochemical industry is an important pillar industry in the national economy. It provides a large amount of chemical raw materials for industry, agriculture, transportation and national defense. It is one of the most relevant and leading industrial sectors in the national economy. Propylene and ethylene are the two most important basic raw materials for modern petrochemical industry. [0003] The bulk downstream products of ethylene mainly include polyethylene, ethylene oxide, ethylene glycol, polyvinyl chloride, styrene, vinyl acetate, etc. The size of ethylene production is a sign to measure the degree of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C4/06C07C11/04C07C11/06B01J27/185B01J29/80
CPCY02P20/52
Inventor 杨为民张惠明刘俊涛马广伟
Owner CHINA PETROLEUM & CHEM CORP
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