Cracking auxiliary agent for raising density of propylene

A technology of additives and concentration, applied in cracking, catalytic cracking, petroleum industry, etc., can solve the problems of low propylene selectivity and limited range of propylene concentration, and achieve the effect of increasing selectivity and increasing propylene concentration

Active Publication Date: 2006-07-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The zeolite materials and catalysts disclosed in the prior art are used in the catalytic cracking process. Although they can effectively increase the yield of low-carbon olefins and improve the octane number of catalytic cracking gasoline products, the selection of propylene in the catalytic cracking reaction process The performance is not very high, so the range of increasing the concentration of propylene in liquefied gas is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Phosphoric aluminum sol preparation: 1.05 kilograms of pseudo-boehmite (dry basis) and 3.35 kilograms of decationized water were beaten for 30 minutes, and 4.9 kilograms of concentrated phosphoric acid (chemically pure, containing 85% by weight of phosphoric acid) were added to the slurry under stirring, and the temperature was raised to 70°C, and then reacted at this temperature for 45 minutes to produce a colorless and transparent phosphoraluminum sol. where P 2 o 5 30.6 wt%, Al 2 o 3 10.5% by weight, pH=1.7.

[0063] Take 1.75 kg (dry basis) A 1 , 1.4 kg (dry basis) of kaolin and 0.65 kg (dry basis) of pseudo-boehmite, add 6.2 kg of deionized water and 2.79 kg of aluminum sol for beating for 120 minutes, add 1 liter of FeCl under stirring 3 .6H 2 Aqueous solution of O (which contains 100 g of Fe 2 o 3 ), the pH value of the slurry is 3.0. Continue beating the mixture for 45 minutes, and then add 1.22 kg of phosphorus-aluminum sol to the mixed slurry. After...

Embodiment 2

[0065] Take 1.84 kg (dry basis) A 1 , 1.33 kg (dry basis) of kaolin and 0.98 kg (dry basis) of pseudoboehmite, add 7.2 kg of deionized water and 2.79 kg of aluminum sol for beating for 120 minutes, add 1 liter of FeCl under stirring 3 .6H 2 Aqueous solution of O (which contains 250 g of Fe 2 o 3 ), the pH value of the slurry is 3.0. The mixture was further beaten for 45 minutes, and then the resulting slurry was spray-dried at an inlet temperature of 500° C. and an exhaust gas temperature of 180° C. to obtain microspheres with an average particle diameter of 65 μm. The microspheres were calcined at 500°C for 1 hour to obtain 36.8 wt% A 1 , 26.6 wt% kaolin and 31.6 wt% Al 2 o 3 and 5.0 wt% Fe additive (as Fe 2 o 3 count) microspheres.

[0066] Get 1 kg (dry basis) of the obtained microsphere product, add 10 liters of decationized water and 100 grams of diammonium hydrogen phosphate, heat up to 60° C. under stirring, react at this temperature for 20 minutes, vacuum filt...

Embodiment 3

[0068] Take 1.94 kg (dry basis) A 1 and 1.91 kg (dry basis) of pseudo-boehmite, add 7.2 kg of deionized water and 2.79 kg of aluminum sol for beating for 120 minutes 3 add 1 liter of FeCl under stirring 3 .6H 2 Aqueous solution of O (which contains 550 g Fe 2 o 3 ), the pH value of the slurry is 3.0. The mixture was further beaten for 45 minutes, and then the resulting slurry was spray-dried at an inlet temperature of 500° C. and an exhaust gas temperature of 180° C. to obtain microspheres with an average particle diameter of 65 μm. The microspheres were calcined at 500°C for 1 hour to obtain 38.8 wt% Al, 50.2 wt% Al 2 o 3 and 11 wt% Fe additive (as Fe 2 o 3 count) microspheres.

[0069] Get 1 kg (dry basis) of the obtained microsphere product, add 10 liters of decationized water and 210 grams of diammonium hydrogen phosphate, heat up to 60° C. under stirring, react at this temperature for 20 minutes, vacuum filter the slurry, dry, and then Roasted at 500°C for 2 hour...

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Abstract

This invention describes a pyrolysis assistant for increasing the propylene concentration, which, measured on dry basis, comprises 10-65 wt.% of modified ZSM-5 molecular sieve, 0-60 wt.% of clay, 15-60 wt.% of inorganic oxide binder, 0.5-15 wt.% of one or several metal additives selected from VIIIB group metals and 2-25 wt.% of phosphorus additive, wherein the said ZSM-5 molecular sieve is modified with phosphorus and a metal selected from ferrum, cobalt or nickel, whose anhydrous chemical formulation is (0-0.3)Na2Oíñ(0.5-5)Al2O3íñ(1.3-10)P2O5íñ(0.7-15)MxOyíñ(70-97)SiO2, wherein x represents the molecular number of M and y represents the number needed for the oxidation state of M. The said metal additive and phosphorus additive are both measured by their oxides. The process of this invention can increase the yield of the catalytic pyrolytic liquefied gas, the octane number of the catalytic pyrolytic gasoline, as well as the propylene concentration in the liquefied gas.

Description

technical field [0001] The invention relates to a cracking aid for increasing the concentration of propylene in catalytic cracking liquefied gas. Background technique [0002] Propylene is an important organic chemical raw material. With the rapid growth of demand for polypropylene and other derivatives, the world's demand for propylene is also increasing year by year. Fluid catalytic cracking is one of the important production processes for the production of light olefins and propylene. For most catalytic cracking units, in order to increase the production of light olefins and propylene, the use of catalysts or additives containing zeolite with MFI structure is an effective technical approach. [0003] USP3,758,403 disclosed earlier that the method of adding ZSM-5 zeolite in the catalytic cracking catalyst can improve the octane number of gasoline and increase the C 3 ~C 4 Alkene yields. For example, after adding ZSM-5 zeolite from 1.5, 2.5, 5 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05
Inventor 蒋文斌田辉平陈蓓艳宋海涛罗一斌唐立文徐志诚沈宁元范玉华
Owner CHINA PETROLEUM & CHEM CORP
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