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Petroleum hydrocabon cracking catalyst and its production

A cracking catalyst and catalyst technology, applied in cracking, petroleum industry, catalytic cracking, etc., can solve problems such as poor selectivity of linear hydrocarbon isomerization, achieve reduced olefin content, good linear olefin isomerization catalytic performance, and improve The effect of content

Active Publication Date: 2006-11-01
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 Brnsted acid centers will also be formed in the compositions, and their isomerization selectivity to linear hydrocarbons Inferior, and the purpose of its invention is to prepare hydrofinishing catalyst supports, not to provide matrix components for cracking catalysts

Method used

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  • Petroleum hydrocabon cracking catalyst and its production
  • Petroleum hydrocabon cracking catalyst and its production

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 is 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, and continued 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 dropwise to the solution of O, react at room temperature for 25 minutes, then add dropwise 1:1 ammonia water 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 dropwise 1:1 ammonia water 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

This invention is about a kind of petroleum hydrocarbon cracking catalyst, for dry basis weight, it includes 10-50% Y zeolite,0-5% Choosing Style zeolite,10-60% modified alumina combination,5-45% clay and 2-35% inorganic oxide agglomerant. It is detected by pyridine adsorption infra-red sepectrometry that there is only lewis acid in the surface acid center of the modified alumina combination, no Bronsted acid is detected, and silicon oxide is well-distributed in the alumina phase, the modified alumina combination is still keep the XRD derivant characteristic of the gamma-Al2O3 . The modified alumina combination in the catalyst which this invention mentioned, have good function for catalyzing isomerization of straight chain olefinic hydrocatbon. For this reason the cracking catalyst which this invention mentioned can reduce the contents of olefinic hydrocarbon in the catalytically cracked gasoline, and in the same time it can wide rangeincrease the contents of isoparaffin in the petrol.

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 Applications(China)
IPC IPC(8): C10G11/04
Inventor 宋海涛蒋文斌达志坚陈蓓艳
Owner CHINA PETROLEUM & CHEM CORP
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