Method for preparing dual-molecular-sieve-containing cracking catalyst by using in-situ crystallization

A cracking catalyst and bimolecular sieve technology, which is applied in molecular sieve catalysts, physical/chemical process catalysts, catalytic cracking, etc., can solve the problems that the preparation of in-situ crystallization has not been published, and the pellet catalyst cannot meet the requirements of fluidized operation, etc. , to achieve the effect of rich catalyst pores and strong conversion ability of heavy oil

Active Publication Date: 2013-01-23
REZEL CATALYSTS CORP
View PDF27 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the method disclosed in this technology to prepare small ball catalysts with a particle size of several millimeters can only be used in fixed-bed reactors. It does not disclose that this method can perform in-situ crystallization on kaolin microspheres with a particle size of tens of microns formed by spraying. The prepared pellet catalyst cannot meet the requirements of catalyst fluidization operation in catalytic cracking unit

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing dual-molecular-sieve-containing cracking catalyst by using in-situ crystallization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] With 80 grams of NaZSM-5 molecular sieve (industrial product, Leshan Runhe Catalytic New Material Co., Ltd., silicon-aluminum ratio 30), 80 grams of NaY molecular sieve (same as above, silicon-aluminum ratio 5.0, crystallinity 90%), 800 grams of kaolin and 3 liters of water Add to beating in the gel-forming kettle for 30 minutes, add 400 milliliters of silica sol (same as above, SiO 2 25% by weight) after continuing beating for 30 minutes, use a high-shear mixing emulsifier (MBE-100L type, manufactured by Shanghai Environmental Protection Equipment General Factory) beating and homogenizing after 30 minutes in the laboratory with a small spray dryer (LPG-5 type, Changzhou Jianda Drying Equipment Co., Ltd.) is made into the microsphere of embodiment 1, and its average particle diameter is 65 microns.

[0030] Roast the microspheres at 200° C. for 2 hours to dehydrate in a calciner system with an air pump at a pressure of 0.05 MPa, then turn off the air pump and open the ...

Embodiment 2

[0037] Add 40 grams of HZSM-5 molecular sieve (same as above, silicon-aluminum ratio of 50), 40 grams of HY molecular sieve (same as above, silicon-aluminum ratio of 6.5, crystallinity 80%), 850 grams of kaolin and 3 liters of water into the gelling kettle for beating for 30 minutes, Add 200 ml aluminum sol (same as above, SiO 2 20% by weight), 150 grams of pseudo-boehmite (industrial product, Shanxi Aluminum Plant of Aluminum Corporation of China, solid content 65% by weight) and 25 milliliters of hydrochloric acid (chemically pure, Beijing Chemical Reagent Company, 33% by weight) continue beating for 40 Minutes later, beating and homogenizing with a high-shear mixing emulsifier (same as above) after 30 minutes, the microspheres of embodiment 2 were made on a small spray dryer (same as above) in the laboratory, and its average particle diameter was 62 microns.

[0038] Roast the microspheres at 300° C. for 1 hour to dehydrate in a roasting furnace system with an air pump at ...

Embodiment 3

[0043] 40 g NH 4 ZSM-5 molecular sieve (the same, silicon-aluminum ratio 50) and 40 grams of rare earth ZSM-5 molecular sieve (the same, silicon-aluminum ratio 30, rare earth oxide 2.0% by weight), 40 grams of NH 4 Y molecular sieve (same as above, silicon-aluminum ratio 5.0, crystallinity 90%), 40 grams of rare earth USY molecular sieve (same as above, 2.0 weight percent of rare earth oxide), 850 grams of kaolin and 3 liters of water are added to the gelling kettle for beating for 30 minutes, and 400 ml Sodium silicate (same as above) continues beating after 40 minutes, with high-shear mixing emulsifying machine (same as above) beating homogeneously after 30 minutes, the microsphere of embodiment 3 is made on the small-sized spray drier (same as above) in laboratory, its The average particle diameter is 64 microns.

[0044] Roast the microspheres at 350° C. for 1 hour to dehydrate in a calciner system with an air pump at a pressure of 0.06 MPa, then turn off the air pump and...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A method for preparing dual-molecular-sieve-containing cracking catalyst by using in-situ crystallization is characterized by mixing 1 to 10 % by weight of a ZSM-5, 1 to 10 % of by weight of a Y molecular sieve, 1 to 15 % by weight of a binder and the balance being kaolin, pulping and atomizing to prepare microballoons with an average particle size of 50 to 80 microns; vacuum calcinating and dehydrating under 0.01 to 0.1 MPa and 150 to 500 DEG C for 0.5 to 4 hours, and calcinating under 500 to 900 DEG C for 1 to 10 hours, adding a sodium silicate solution with a solid / liquid ratio of 1 : 1-5; adjusting a pH value of the slurry to 12-14 with a sodium hydroxide solution; hydrothermally crystallizing 20 to 60 % by weight of a NaY molecular sieve with a silica-alumina ratio of 4.5 to 5.8 respectively under 50 to 100 DEG C for 0.5 to hours and under 80 to 130 DEG C for 15 to 40 hours; and hydrothermally exchanging for 1 to 3 times with a rare earth salt solution and an ammonium salt solution and calcinating under 400 to 750 DEG C for 1 to 4 hours for 1 to 2 times to prepare a catalyst with less than or equal to 1.0 % by weight of Na2O and 2 to 12 % by weight of rare earth oxide, wherein the catalyst contains the ZSM-5 molecular sieve and the Y molecular sieve, and has advantages of strong conversion capability of heavy oil, large liquid yield and high octane number of gasoline.

Description

technical field [0001] The invention relates to a method for preparing a catalyst for catalytic conversion of petroleum hydrocarbons, in particular to a method for preparing a bimolecular sieve-containing cracking catalyst by in-situ crystallization, and belongs to the field of petrochemical catalysts. Background technique [0002] As early as the 1960s, Heden et al. from Enghard Mineral Chemical Company of the United States first disclosed in USP3391994 the NaY in-situ crystallization technology in which kaolin was used as a matrix to prepare active components and matrix symbiosis, and developed in-situ crystallization to produce Y molecular sieves. catalyst method. The process is to first spray kaolin slurry into microspheres suitable for fluid catalytic cracking units, and after roasting, convert a part of the microspheres into NaY molecular sieves in an alkaline system, and then modify them. Prepared as catalytic cracking catalyst, USP3503900 and so on. Compared with t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G11/05
Inventor 卓润生
Owner REZEL CATALYSTS CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap