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Petroleum hydrocabon cracking catalyst and production thereof

A cracking catalyst, petroleum hydrocarbon technology, applied in catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve problems such as poor isomerization selectivity of straight chain hydrocarbons, reduce olefin content, increase content, improve Effect of Catalytic Performance on Isomerization of Linear Olefins

Active Publication Date: 2009-07-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The compositions in the above patents all use alkali metal aluminates or solutions containing alkali metal aluminates as raw materials, so the compositions will also form Acid sites, which are less selective for the isomerization of linear hydrocarbons and which were invented to prepare hydrofinishing catalyst supports rather than to provide matrix components for cracking catalysts

Method used

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  • Petroleum hydrocabon cracking catalyst and production thereof
  • Petroleum hydrocabon cracking catalyst and production thereof
  • Petroleum hydrocabon cracking catalyst and production thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The silica modified alumina composition provided by the invention is prepared.

[0045] 500 g deionized water and 506.5 g AlCl 3 ·6H 2 16.1 grams of water glass solution (Shandong Aluminum Factory, SiO 2 content of 20.6%), reacted at room temperature for 30 minutes, then added dropwise 1:1 ammonia water (Beijing Chemical Plant, analytically pure) to adjust the pH value until a gel was formed, and its pH value was 4.5. After continuing to stir and heat up to 65°C , stop stirring and age for 1 hour, vacuum filter. The filter cake was reslurried with decationized water at 60°C for 20 minutes and vacuum filtered. So repeated washing 3 times, to obtain the modified composition M 1 . Its chemical composition, physicochemical properties and surface acidity measured by pyridine adsorption infrared spectroscopy are listed in Table 1.

Embodiment 2

[0047] Preparation of the silica-modified alumina composition provided by the invention.

[0048] 500 g deionized water and 475.2 g AlCl 3 ·6H 2 Slowly add 48.2 grams of water glass solution to the solution of O, react at room temperature for 25 minutes, then add 1:1 ammonia water dropwise to adjust the pH value until a gel is formed, and its pH value is 4.8, continue to stir and heat up to 60°C , stop stirring and age for 1.5 hours, vacuum filter. The filter cake was reslurried with 70°C decationized water for 25 minutes and vacuum filtered. So repeated washing 3 times, to obtain the modified composition M 2 . Its chemical composition, physicochemical properties and surface acidity measured by pyridine adsorption infrared spectroscopy are listed in Table 1.

Embodiment 3

[0050] Preparation of the silica-modified alumina composition provided by the invention.

[0051] 500 grams of deionized water and 454.5 grams of AlCl 3 ·6H 2 Slowly add 69.6 grams of water glass solution to the solution of O, react at room temperature for 30 minutes, then add 1:1 ammonia water dropwise to adjust the pH value until a gel is formed, and its pH value is 5.5, continue to stir and heat up to 70°C , stop stirring and age for 1.5 hours, vacuum filter. The filter cake was reslurried with 65°C decationized water for 30 minutes and then vacuum filtered. So repeated washing 3 times, to obtain the modified composition M 3 . Its chemical composition, physicochemical properties and surface acidity measured by pyridine adsorption infrared spectroscopy are listed in Table 1.

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Abstract

The invention relates to a petroleum hydrocarbon cracking catalyst, which contains 10-50 wt% of Y-type zeolite, 0-5 wt% of shape-selective zeolite, and 10-60 wt% of modified alumina composition based on dry weight , 5-45% by weight of clay and 2-35% by weight of inorganic oxide binder, the surface acid center of the modified alumina composition measured by pyridine adsorption infrared spectroscopy has only Lewis acid, no Brnsted acid , wherein the silicon oxide component is uniformly dispersed in the alumina bulk phase, and the modified alumina composition still maintains the XRD diffraction phase characteristics of γ-Al2O3. The modified alumina composition in the catalyst provided by the present invention has good catalytic performance for isomerization of linear olefins, so the cracking catalyst provided by the present invention can reduce the olefin content in catalytic cracking gasoline, and can greatly Increase the content of isoparaffins in gasoline.

Description

technical field [0001] The present invention relates to a petroleum hydrocarbon cracking catalyst, more specifically, relates to a cracking catalyst containing a silica-modified alumina composition for producing gasoline rich in isoparaffins. Background technique [0002] As environmental protection has increasingly stringent quality requirements for gasoline products, gasoline has developed from unleaded gasoline to new formula gasoline. There are clear restrictions on the content of olefin components in the reformulated gasoline standard. For example, the Class II gasoline standard in the World Fuel Oil Specification requires that the olefin content in gasoline components be less than 20% by volume. China's gasoline standards implemented in the three major cities of Beijing, Shanghai, and Guangzhou from July 1, 2002 require that the olefin content in gasoline components be less than 35% by volume. China's future gasoline quality standards will further limit the content o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/02B01J29/08C10G11/04
Inventor 宋海涛蒋文斌达志坚陈蓓艳
Owner CHINA PETROLEUM & CHEM CORP
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