Cracking catalyst containing modified beta zeolite

A technology of cracking catalyst and beta zeolite, which is applied in the direction of physical/chemical process catalyst, molecular sieve catalyst, cracking, etc., and can solve the problem of low liquid yield

Active Publication Date: 2016-11-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst has higher propylene yield and raw material conversion rate, but lower liquid yield

Method used

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  • Cracking catalyst containing modified beta zeolite
  • Cracking catalyst containing modified beta zeolite
  • Cracking catalyst containing modified beta zeolite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Get 200g sodium type β zeolite (production of Sinopec Catalyst Qilu Branch, SiO 2 / Al 2 o 3 =25 (mol ratio), dry basis accounts for 75% by weight), mixed with 3000g deionized water and 45g ammonium chloride and made a slurry, stirred for 2 hours at 80°C, then filtered, and repeated the above process 3 times to make the Na in the zeolite 2 The O content is lower than 0.2% by weight, roasted at 600°C and 100% steam for 2 hours to obtain ammonium-exchanged zeolite beta, with a water content of 3% by weight, which is designated as A-1;

[0033]52.3g zirconium nitrate Zr (NO 3 ) 4 ·5H 2 O was dissolved in 150g ethanol (analytically pure) to obtain an impregnating solution, and then the impregnating solution was mixed with ammonium-exchanged β zeolite A-1 evenly, left to stand for 24 hours, dried at 100°C for 24 hours, and dried in a nitrogen atmosphere at 500°C Lower roasting for 4 hours to obtain the roasted zeolite beta, denoted as AC-1;

[0034] Beta zeolite AC-1 af...

Embodiment 2

[0037] Take 200g of sodium-type beta zeolite (same as above), mix it with 2000g of deionized water and 45g of ammonium chloride and make a slurry, stir at 80°C for 1 hour, then filter, repeat the above exchange process 3 times, and roast at 650°C for 2 hours to obtain ammonium Beta zeolite A-2 after exchange; Na in zeolite A-2 2 The O content is less than 0.2% by weight and the water content is 1% by weight;

[0038] Dissolve 18.9g of zirconium isopropoxide in 450g of ethanol, then mix the resulting solution with ammonium-exchanged zeolite A-2 evenly, stir for 24 hours, dry at 100°C for 24 hours, and bake at 550°C in a nitrogen atmosphere for 3 Hour, obtain the beta zeolite AC-2 after roasting;

[0039] Beta zeolite AC-2 after the above-mentioned roasting is joined in the oxalic acid aqueous solution of 2.0mol / L in 1500g acid concentration, then add 13.96g (NH 4 ) 2 HPO 4 , heated up to 90°C, stirred for 1 hour, then filtered, washed with deionized water (the amount of was...

Embodiment 3

[0042] Take 200g of sodium-type β zeolite (same as above), mix it with 2000g of deionized water and 60g of ammonium chloride for beating, stir at 90°C for 3 hours, then filter, repeat the above exchange process twice, and Na on the zeolite 2 The O content is less than 0.2% by weight, roasted at 500°C for 5 hours, and the water content is 1.5% by weight, to obtain ammonium-exchanged zeolite beta A-3;

[0043] 10.5g zirconium nitrate Zr(NO 3 ) 4 ·5H 2 O was dissolved in 200g of ethanol, and then the above solution was mixed evenly with the ammonium-exchanged β zeolite, and dried after standing for 12 hours; the dried zeolite was composed of 25.6g of tetrabutyl titanate and 200g of ethanol Mix the impregnating solution, let it stand for 12 hours, then dry it at 100°C for 24 hours, and roast it under nitrogen atmosphere at 600°C for 2 hours to obtain the roasted zeolite beta, which is denoted as AC-3;

[0044] Beta zeolite AC-3 after the above-mentioned roasting is joined in th...

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Abstract

A cracking catalyst containing modified beta zeolite comprises, by weight, 10-80% of Y type zeolite, 1-50% of modified beta zeolite, 5-70% of clay and 5-60% of heat-resistant inorganic oxide. The anhydrous chemical expression of the modified beta zeolite is, by mass of oxide, (0-0.2)Na2O.(0.5-15)ZrO2.(0-10)MxOy.(1-10)P2O5.(0.5-15)Al2O3.(60-98)SiO2, wherein M is one or more of Ti, Cr, Fe and Ga, x refers to the atomicity of M, y refers to a number required by the oxidation state of M. A preparation method of the catalyst includes the step that Y type zeolite, modified beta zeolite, clay, heat-resistant inorganic oxide, adhesive and water are mixed, pulped, sprayed and dried. The catalyst is high in hydrocarbon cracking capacity, high in liquefied gas yield and high in propylene concentration in liquefied gas.

Description

technical field [0001] The invention relates to a cracking catalyst, more specifically, to a cracking catalyst containing modified β zeolite. Background technique [0002] With the rapid growth of the demand for derivatives such as polypropylene, the world's demand for propylene is increasing year by year. Fluid catalytic cracking is one of the important processes for the production of light olefins and propylene. In order to increase the production of low-carbon olefins and propylene, people usually add shape-selective molecular sieves in the catalyst, as US3758403 discloses a catalyst with ZSM-5 and large-pore zeolite (mainly Y-type zeolite) as active components, which can improve the octane number of gasoline At the same time, it also increases the yield of C3 and C4 olefins. The large-pore zeolite cracks the raw materials to generate gasoline and diesel, and the ZSM-5 shape-selective molecular sieve further cracks them into low-carbon olefins. Although ZSM-5 is a commo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G11/05C10L3/12
Inventor 于善青田辉平王振波
Owner CHINA PETROLEUM & CHEM CORP
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