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Cracking catalyst containing modified beta zeolite

A technology of catalyst and beta zeolite, which is applied in physical/chemical process catalysts, molecular sieve catalysts, cracking, etc., and can solve problems such as 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

[0033] Get 200g sodium type β zeolite (production of Sinopec Catalyst Qilu Branch, SiO 2 / Al 2 o 3 =25 (molar ratio), dry basis accounts for 75% by weight), after beating with 1500g deionized water, add 45 grams (NH 4 ) 2 SO 4 and 45 mL RECl 3 Solution (RE 2 o 3 Concentration 270 g / liter, the same below), heated up to 90°C for exchange for 1 hour, filtered and washed with deionized water, and roasted for 2 hours at 600°C and 100% steam to obtain zeolite beta after rare earth exchange, with a water content of 3 wt. %, denoted as A-1;

[0034] 5.23g zirconium nitrate Zr (NO 3 ) 4 ·5H 2 O was dissolved in 150g ethanol (analytically pure) to obtain an impregnating solution, and then the above impregnating solution was mixed with rare earth-exchanged 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, denoted as AC-1;

[0035] Add the roasted beta zeolite AC-1 to 2000 g of a...

Embodiment 2

[0038] Take 200g of sodium-type β zeolite (same as above), beat with 2000g of deionized water, add 35g of ammonium chloride and 22.2ml of RECl 3Solution (RE 2 o 3 Concentration 270 grams / litre), heat up to 85 DEG C and exchange for 1.5 hours, filter and wash with deionized water, and roast under 550 DEG C and 100% water vapor for 3 hours to obtain β zeolite after rare earth exchange, water content 3% by weight, record for A-2;

[0039] Dissolve 15.7g of zirconium oxychloride in 200g of ethanol, then mix the obtained solution with rare earth-exchanged beta 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;

[0040] The beta zeolite AC-2 after above-mentioned roasting is joined in 1500g acid concentration and is the oxalic acid aqueous solution of 2.0mol / L, is heated up to 90 ℃ and continues to stir for 1 hour, then filters, washes with deionized water (the amoun...

Embodiment 3

[0043] Take 200g of sodium-type β zeolite (same as above), beat with 3000g of deionized water, add 30g of ammonium chloride and 33.4ml of RECl 3 Solution (RE 2 o 3 Concentration 270 grams / litre), be warming up to 80 ℃ and exchange 2 hours, filter and wash with deionized water, roast 2 hours under 500 ℃, 100% water vapor, obtain beta zeolite after rare earth exchange, water content 2% by weight, record for A-3;

[0044] Dissolve 28.3g of zirconium isopropoxide in 200g of ethanol, then mix the above solution with the obtained rare earth-exchanged β zeolite A-3, leave it to stand for 12 hours, and then dry it; Hours, the zeolite beta after roasting was obtained, denoted as AC-3;

[0045] The beta zeolite AC-3 after above-mentioned roasting is joined in 1000g acid concentration and is the hydrochloric acid aqueous solution of 0.5mol / L, is stirred at 80 ℃ for 3 hours, then filters, washes with deionized water (the amount of washing water is 20% of the molecular sieve dry weight)...

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Abstract

A cracking catalyst containing modified beta zeolite comprises 10 wt%-80 wt% of Y zeolite, 1-50 wt% of the modified beta zeolite, 5-70 wt% of clay and 5-60 wt% of a heat-resistant inorganic oxide; theanhydrous chemical expression formula of the modified beta zeolite is(0-0.2)Na2O.(0.5-15)MO2.(0.5-15)RE2O3.(0.5-15)Al2O3(60-98). SiO2 on the basis of oxide mass, wherein M is one or two substances selected from group IVB metals. The preparation method of the catalyst comprises mixing and beating of the Y zeolite, the modified beta zeolite, the clay, the heat resistant inorganic oxide, a binder and water and spraying drying. The catalyst has strong heavy oil cracking ability and high total liquid yield, and propylene in liquefied gas has high concentration.

Description

technical field [0001] The present invention relates to a catalytic cracking catalyst, in particular 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...

Claims

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Application Information

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IPC IPC(8): B01J29/80C10G11/05C07C11/06C07C4/06
CPCY02P20/52
Inventor 于善青田辉平王振波
Owner CHINA PETROLEUM & CHEM CORP
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