Composite molecular sieve catalyst capable of improving octane number of gasoline and preparation method of composite molecular sieve catalyst

A composite molecular sieve and gasoline octane number technology, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of different catalyst preparation processes and performance, and reduce the production rate and consumption of liquefied gas. , to avoid the effect of equipment corrosion

Active Publication Date: 2012-05-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The applicant disclosed a composite molecular sieve containing 5-90% by weight in CN200910237005.5, which contains 1-60% by weight of BETA molecular sieve, 1-30% by weight of modified ZSM-5 molecular sieve, and 2-60% by weight of clay , a catalyst of 5-30% by weight of aluminum phosphate, which is also used in the FCC process to produce high-octane gasoline, but the preparation process and performance of the catalyst are different from those of this patent

Method used

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  • Composite molecular sieve catalyst capable of improving octane number of gasoline and preparation method of composite molecular sieve catalyst
  • Composite molecular sieve catalyst capable of improving octane number of gasoline and preparation method of composite molecular sieve catalyst
  • Composite molecular sieve catalyst capable of improving octane number of gasoline and preparation method of composite molecular sieve catalyst

Examples

Experimental program
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Embodiment 1

[0041] This example illustrates the preparation of an aluminum phosphate 1 for use in the catalyst according to the invention.

[0042] 4.39 kg of pseudoboehmite (containing Al 2 o 3 68.3%) and 4.34 kilograms of decationized water for beating for 30 minutes, under stirring, add 11.79 kilograms of 75.8% concentrated phosphoric acid in the slurry, then add 4.41 kilograms of 63% concentrated nitric acid, and continue stirring for 45 minutes to obtain colorless and transparent aluminum phosphate. The pH is 1.5. After analysis, this aluminum phosphate contains P11.0% by weight, Al 6.2% by weight, P / Al (weight)=1.77, HNO 3 The content is 11% by weight, and the viscosity (25° C.) is 62 mPa·s.

Embodiment 2

[0044] This example illustrates the preparation of an aluminum phosphate 2 for use with the adjuvant according to the invention.

[0045] 6.08 kg of pseudoboehmite (containing Al 2 o 3 68.3%) and 12.18 kilograms of decationized water were beaten for 60 minutes, and 28.39 kilograms of 75.8 percent phosphoric acid was added to the slurry under stirring, and the stirring reaction was continued for 90 minutes to obtain colorless and transparent aluminum phosphate with a pH of 1.2. After analysis, the aluminum phosphate contained 14.2% by weight of P, 4.4% by weight of Al, P / Al (weight) = 3.2, and a viscosity (25° C.) of 23 mPa·s.

Embodiment 3

[0047] This example illustrates the preparation of an aluminum phosphate 3 for use with the adjuvant according to the invention.

[0048] 2.28 kg of pseudoboehmite (containing Al 2 o 3 65.8%) and 5.14 kilograms of decationized water were beaten for 60 minutes, and 10.64 kilograms of 75.8 percent phosphoric acid was added to the slurry under stirring, and the stirring reaction was continued for 90 minutes to obtain colorless and transparent aluminum phosphate with a pH of 1.22. After analysis, the aluminum phosphate contains P 2 o 5 31.8 wt%, Al 2 o 3 8.2% by weight, P / Al (mol) = 2.8

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Abstract

The invention relates to a composite molecular sieve catalyst for preparing high-octane gasoline. The catalyst comprises 5-60 parts by weight of molecular sieve dry basis, and the molecular sieve comprises 1-45% of BETA molecular sieve, 1-40% of ZSM-5 molecular sieve, and the balance being clay and other molecular sieves selected from one or more of EU-1, NU-87, SAPO-11, L, and the ITQ, MCM-22, MCM-49, MCM-56, USY and REUSY according to 100%; and a compound A containing the BETA molecular sieve and a compound B containing the ZSM-5 molecular sieve are respectively prepared and are mixed according to the weight ratio of 1:0.1 to 10 to obtain the composite molecular sieve catalyst. In a catalytic cracking unit, the catalyst is used as an addition agent to be mixed with a main catalyst to prepare high-octane gasoline, the gasoline production rate is high, and the production rate of liquefied petroleum can be flexibly adjusted.

Description

technical field [0001] The invention relates to a composite molecular sieve catalytic cracking catalyst for improving gasoline octane number and a preparation method thereof. Background technique [0002] The octane number of gasoline has always been concerned by researchers, which makes the continuous development of catalyst systems to improve the octane number of catalytic cracking process products. For example, a series of US patents 3,758,403, 3,894,931, 3,984,933, 3,894,934 and 4,309,280 relate to cracking catalysts containing ZSM-5 type zeolite molecular sieves as catalyst components. Because ZSM-5 is a high-silica zeolite with a five-membered ring structure and a pore size of 0.54×0.56nm, and its skeleton silicon-alumina ratio is above 12, this type of zeolite has shape-selective adsorption characteristics for normal and isomeric hydrocarbons. Therefore, it can be used to selectively crack low-octane n-alkanes to effectively increase the octane number of gasoline. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G11/05
Inventor 庞新梅周志远张爱群王骞高晓慧朴佳锐王晓化刘其武阎立军
Owner PETROCHINA CO LTD
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