Catalytic cracking catalyst for reducing coke yield and producing gasoline

A technology of catalytic cracking and coke yield, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of zeolite product crystallinity decrease, zeolite crystallinity decrease, zeolite skeleton destruction, etc., to reduce coke formation , good stability, and the effect of improving gasoline selectivity

Active Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
View PDF19 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This treatment method uses the treatment of zeolite samples under the condition of low pH value, and does not adopt protective measures, which will easily lead to the destruction of zeolite framework and reduce the crystallinity of zeolite.
[0014] US 4503023 discloses a kind of LZ~210 zeolite and its preparation method. NaY zeolite is dealuminated with fluorosilicate to increase the silicon-aluminum ratio of the zeolite. When dealuminating Y zeolite, the SiO of the zeolite product 2 / Al 2 o 3 The molar ratio usually cannot be higher than 13, otherwise, the crystallinity of zeolite products will be greatly reduced
In addition, the modified Y zeolite prepared by using fluorosilicate to dealuminate and supplement silicon has very few secondary pores, which is unfavorable for heavy oil catalytic cracking reactions

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
  • Catalytic cracking catalyst for reducing coke yield and producing gasoline
  • Catalytic cracking catalyst for reducing coke yield and producing gasoline
  • Catalytic cracking catalyst for reducing coke yield and producing gasoline

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The preparation method of the above-mentioned modified Y-type molecular sieve is obtained by using NaY molecular sieve as a raw material through the preparation process of "three-cross three-baking". The so-called "three-cross three-baking" is a general abbreviation for a molecular sieve modification process in the field. That is, the combined modification process of three times of exchange and three times of hydrothermal treatment is adopted. The rare earth and phosphorus are exchanged, and the exchange solution containing phosphorus and the exchange solution containing rare earth are added for exchange. Phosphorus can be added in any exchange process, and can be added once or several times. The rare earth can be added in any exchange process other than the first exchange, and the exchange process can also add a dealumination agent to carry out chemical dealumination to promote the removal of aluminum. The chemical dealumination process can be carried out in any exchange...

Embodiment 1

[0083] (1) Preparation of modified molecular sieves

[0084] Use NaY molecular sieve as raw material to exchange with ammonium sulfate solution. The treatment conditions are: NaY molecular sieve (dry basis): ammonium sulfate: water = 1:1.0:8 (weight ratio), adjust the pH value to 3.5 with sulfuric acid, exchange at 85°C for 1 hour, wash . Hydrothermal roasting treatment, roasting temperature 580°C, 100% steam roasting time 2h. Treat the post-baked sample with a solution containing rare earth, the treatment conditions are: a baked molecular sieve (dry basis): rare earth chloride (according to RE 2 o 3 Calculated): water = 1:0.042:8 (weight ratio), exchanged at 70°C for 1h, and washed with deionized water. Hydrothermal roasting treatment, roasting temperature 580°C, 100% steam roasting time 2h. Treat the sample after secondary baking with a solution containing phosphoric acid and oxalic acid. The treatment conditions are: secondary baking molecular sieve (dry basis): phospho...

Embodiment 2

[0094] (1) Preparation of modified molecular sieves

[0095] Use NaY molecular sieve as raw material to exchange with ammonium chloride solution. The treatment conditions are: NaY molecular sieve (dry basis): ammonium chloride: water = 1:0.8:8, adjust the pH value to 4.0 with hydrochloric acid, exchange at 90°C for 1 hour, and wash. Hydrothermal roasting treatment, roasting temperature 550°C, 80% steam roasting time 2h. Treat the post-baked sample with phosphoric acid and fluosilicic acid solution, the treatment conditions are: a baked molecular sieve (dry basis): phosphoric acid (according to P): fluosilicic acid: water = 1: 0.01: 0.03: 8, hydrochloric acid to adjust pH2. 8. Exchange at 70°C for 1 hour, filter; wash with deionized water. Hydrothermal roasting treatment, roasting temperature 550°C, 70% steam roasting time 2h. Treat the sample after secondary roasting with a solution containing rare earth, and the treatment conditions are: secondary roasting molecular sieve (...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
crystallinityaaaaaaaaaa
Login to view more

Abstract

The invention relates to a catalytic cracking catalyst for reducing coke yield and producing gasoline. Based on the weight of the dry base, the catalytic cracking catalyst contains 10wt%-50wt% of modified Y type molecular sieve, no more than 30wt% of specific rare earth-containing Y type molecular sieve, 10wt%-70wt% of clay and 10wt%-40w% of inorganic oxide binder based on oxide base, wherein the lattice constant of the modified Y type molecular sieve is 2.420-2.440nm; by calculating in percentage by weight, P accounts for 0.05-6%, RE2O3 accounts for 0.03-10%, aluminum oxide is less than 22%, and the specific hydroxyl nest concentration is less than 0.35mmol/g. The catalytic cracking catalyst provided by the invention can reduce green coke, improve the utilization rate of heavy oil and improve gasoline selectivity.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst for hydrocarbon oil, and further relates to a catalytic cracking catalyst for reducing coke yield and improving gasoline selectivity. Background technique [0002] With the decreasing of petroleum resources, it has become an indisputable fact that petroleum raw materials become heavy and inferior. As the main processing method to convert heavy oil into gasoline and diesel light fuel oil, catalytic cracking inevitably needs to process more and lower quality heavy oil feedstock. The reduction of conversion rate and the increase of coke yield are one of the manifestations of the impact of the heavy and poor quality of feedstock oil on catalytic cracking. Aiming at this, people have done a lot of research on molecular sieve modification, catalyst manufacturing and process design (Liu Tao, Zhang Zhongdong, Zhang Haitao, etc. Sinoforeign Energy. 2009, 14(1): 71-77). However, most of the current catalys...

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 龙军任飞朱玉霞罗一斌严加松田辉平庄立杨雪李明罡欧阳颖舒兴田
Owner CHINA PETROLEUM & CHEM 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