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Modified Y molecular sieve-containing catalytic cracking catalyst

A cracking catalyst and catalytic cracking technology, applied in molecular sieve catalyst, catalytic cracking, physical/chemical process catalyst, etc., can solve the problems of high activity and good coke selectivity, low utilization rate of rare earth, complex modification process, etc. Good coke selectivity, improved heavy oil conversion capacity, optimized performance

Active Publication Date: 2011-04-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of the existing technology is that the modification process is complex, such as the super-stabilization of molecular sieves and the phosphorus modification process are carried out in a distributed manner, the production cycle is long, and the utilization rate of rare earths is not high; High activity and good coke selectivity at the same time

Method used

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  • Modified Y molecular sieve-containing catalytic cracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 5 kg of NaY (dry basis), add 50 liters of deionized water, make a slurry, slowly add 5 liters of rare earth chloride solution under stirring, use 3 mol / liter of hydrochloric acid to adjust the slurry pH to 4.5, exchange at 30 ° C for 0.5 hours, Then add 83.3 grams of diammonium hydrogen phosphate, continue to react for 1 hour, filter and wash with water, and filter cake is roasted for 1.5 hours at 500° C. under 80% water vapor condition to obtain the modified Y subsieve of the present invention. for P-1.

[0030] With 1.75 kilograms of kaolin (dry basis), use the above-mentioned method to make modified Y molecular sieve P-12.77 kilograms, 1 kilogram of pseudo-boehmite (63.2 weight % of alumina content, the same below), 2 kilograms of aluminum sol and 6 kilograms of deionized Mix with water, stir and add 160 ml of hydrochloric acid, stir for 1 hour, spray dry, wash and dry to obtain catalyst a.

Embodiment 2

[0032]Take 5 kg of NaY (dry basis), add 40 liters of deionized water, make a slurry, slowly add 3.2 liters of rare earth chloride solution under stirring, use 2 mol / liter of hydrochloric acid to adjust the slurry pH to 5.5, exchange at 40 ° C for 50 minutes, Then add 83.3 grams of diammonium hydrogen phosphate, continue to react for 0.5 hour, filter, wash with water, filter cake is at 550 ℃, roasting 1 hour under 100% water vapor condition, obtain " one cross one roasting " modified Y subsieve of the present invention, record for P-2.

[0033] The catalyst was prepared under the same conditions as in Example 1, except that the modified Y molecular sieve P-1 was changed to the modified Y molecular sieve P-2, and 0.1 kg of ZSM-5 was added. Kaolin is changed to halloysite, and the addition amount remains unchanged to obtain catalyst b of the present invention.

Embodiment 3

[0035] Take 5 kilograms of NaY (dry basis), add 25 liters of deionized water, make a slurry, slowly add 5.0 liters of rare earth nitrate solution under stirring, use 2 mol / liter of hydrochloric acid to adjust the slurry pH to 6.0, exchange for 2 hours at 20 ° C, and then Add 416.5 grams of ammonium dihydrogen phosphate, continue the reaction for 1 hour, filter, wash with water, and roast the filter cake for 3 hours at 350° C. under 100% water vapor conditions to obtain the modified Y subsieve of the present invention, denoted as P-3.

[0036] With 1.75 kilograms of kaolin (dry basis), 1.25 kilograms of modified Y molecular sieve P-3, 0.2 kilograms of β molecular sieves, 1.9 kilograms of pseudoboehmite, 2.49 kilograms of aluminum sol and 6 kilograms of deionized water were mixed and stirred After that, 190 ml of hydrochloric acid was added, stirred for 1 hour, spray-dried, washed and dried to obtain catalyst c.

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Abstract

The invention discloses a modified Y molecular sieve-containing catalytic cracking catalyst. The modified Y molecular sieve is prepared by the following steps of: performing an exchange reaction on a NaY molecular sieve and rare earth solution; introducing a precursor of phosphorus into exchange size for further reaction; and filtering, washing, and roasting the filter cake under the water vapor condition. The catalyst comprises 2 to 45 weight percent of modified Y molecular sieve, 0 to 30 weight percent of one or more kinds of other modified molecular sieves, 10 to 70 weight percent of clay and 10 to 45 weight percent of high-temperature resistant inorganic oxide. The molecular sieves, the clay and the precursor of the high-temperature resistant inorganic oxide are uniformly mixed according to a certain ratio, are subjected to spray molding and are washed to prepare the catalyst, and the prepared catalyst has high heavy oil conversion capacity and high coke selectivity.

Description

technical field [0001] The present invention relates to a catalytic cracking catalyst containing modified Y molecular sieve, and more specifically relates to a cracking catalyst containing compound modified Y molecular sieve of "cross-baked" rare earth and phosphorus. Background technique [0002] In recent years, with the increasing difficulty of oil extraction, the trend of heavy crude oil in the world is very obvious. While the quality of crude oil is getting heavier and worse, the world's demand for light oil products is increasing day by day. The reserves of heavy oil and conventional crude oil account for 53% and 25% respectively in the world. The vast majority of crude oil in my country also belongs to heavy crude oil. The yield of heavy oil above 350°C accounts for more than 70% of crude oil. In addition, FCC process blending The proportion of residual oil is also increasing, and residual oil catalytic cracking (RFCC) is playing an increasingly important role in heavy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J29/80C10G11/05
Inventor 刘从华张志国丁伟高雄厚王栋黄校亮蔡进军张茵曹庚振娄来银刘娟娟柳召永
Owner PETROCHINA CO LTD
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