Catalytic cracking auxiliary agent

A technology of additives and binders, which is applied in the field of additives to increase the concentration of propylene in catalytic cracking liquefied gas, can solve the problems of low propylene selectivity and limited range of propylene concentration, so as to improve selectivity and increase propylene concentration. effect of 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

[0058] Take 1.84 kg (dry basis) A 1 , 1.11 kilograms of (dry basis) mordenite, 0.47 kilograms of (dry basis) clinoptilolite and 0.98 kilograms of (dry basis) pseudo-boehmite (industrial grade, Shandong aluminum factory production, solid content 60 weight %), add 7.2 kilograms Decationized water and 2.79 kg of aluminum sol (produced by Qilu Petrochemical Catalyst Factory, solid content 21.5% by weight) were beaten for 120 minutes, and under stirring, hydrochloric acid with a concentration of 36% by weight was added, and the amount of hydrochloric acid made the pH value of the slurry 3.0. The mixture was continued beating for 45 minutes. Then, the obtained slurry was spray-dried under the conditions of 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% Al, 22.12 wt% mordenite, 9.48 wt% clinoptilolite and 31.6 wt% Al 2 o...

Embodiment 2

[0061] Stir 3.5 kg (dry basis) of mordenite and 1.5 kg (dry basis) of clinoptilolite with 1.5 liters of aqueous solution containing 0.97 kg of diammonium hydrogen phosphate for saturated impregnation, let stand for 12 hours, dry and roast at 550 ° C 2 hours, obtain phosphorus modification and phosphorus content is 10 weight % (with P 2 o 5 A mixture of mordenite and clinoptilolite.

[0062] The auxiliary agent is prepared according to the method of Example 1, except that the zeolite is replaced by the above-mentioned phosphorus-modified zeolite mixture of the same weight to obtain a compound containing 35% by weight of A 1 , 18.9 wt% mordenite, 8.1 wt% clinoptilolite and 30 wt% Al 2 o 3 , and additive ZJ with 8 wt% phosphorus additive 2 .

Embodiment 3

[0064] Take 1.94 kg (dry basis) A 1 , 1.11 kg (dry basis) natural zeolite (produced from the natural zeolite mine in Jimsar County, Xinjiang, through pickling and ammonium treatment, wherein the weight ratio of mordenite and clinoptilolite is 70:30, and the properties are shown in Table 1) and 1.34 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, add concentration of 36% hydrochloric acid under stirring, the amount of hydrochloric acid makes the pH value of the slurry 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 38.9 wt% A 1 , 22.2% by weight natural zeolite and 38.9% by weight Al 2 o 3 of microspheres.

[0065] Get 1 kg (dry basis) of the obtained...

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Abstract

This invention describes a catalytic pyrolysis assistant, which, measured on dry basis comprises 10-65 wt.% of modified ZSM-5 molecular sieve, 15-60 wt.% of two zeolites, 15-70 wt.% of inorganic oxide binder 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 two zeolites are a mixture of KL zeolite and clinoptilotite zeolite with a weight ratio of 1:99-99:1, and the said binder and phosphorus additive are both measured by their oxides. Application of the assistant in the catalytic pyrolysis of petroleum hydrocarbons can increase the yield of the catalytic pyrolytic liquefied gas, as well as the propylene concentration in the liquefied gas.

Description

technical field [0001] The present invention relates to a catalytic cracking auxiliary agent, more specifically to an auxiliary agent 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 Al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05
Inventor 蒋文斌宋海涛陈蓓艳田辉平罗一斌舒兴田沈宁元范玉华
Owner CHINA PETROLEUM & CHEM CORP
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