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Method and system for online cycle regeneration of hydrocracking catalyst

A hydrocracking and catalyst technology, applied in chemical instruments and methods, chemical/physical processes, petroleum industry, etc., can solve the problems of adding fixed bed hydrotreating reactors, high cost, and promote high conversion rate and high selection. performance, to achieve the effect of online recycling

Active Publication Date: 2021-11-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires hydrofinishing of FCC diesel oil before hydrocracking, adding a fixed-bed hydrofinishing reactor, and the cost is higher

Method used

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  • Method and system for online cycle regeneration of hydrocracking catalyst
  • Method and system for online cycle regeneration of hydrocracking catalyst
  • Method and system for online cycle regeneration of hydrocracking catalyst

Examples

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preparation example Construction

[0062] The silicon oxide source can be the silicon oxide source commonly used in the preparation of binders in the art, such as diatomaceous earth, expanded perlite, kaolin, siliceous rock, layered clay, hydrolyzed silica, macroporous oxide One or more of silicon and silica gel.

[0063] According to the present invention, the amount of the alumina source and the silica source is preferably such that the content of the binder in the resulting catalyst is within the range described above, preferably such that the weight ratio of alumina and silica in the binder is 100: 20-150, preferably 100:30-100. For example, the weight ratio of alumina source and silica source is 100:50-150, preferably 100:55-120, more preferably 100:60-100.

[0064] According to the invention, the binder precursor slurry is acidified, wherein the acid preferably brings the binder precursor slurry to a pH of 1-5. The acid may be one or more of organic acids and inorganic acids, such as one or more of hydr...

Embodiment 1

[0143] This example is used to illustrate the hydrocracking catalyst and its preparation method of the present invention.

[0144] (1) USY molecular sieves (purchased from Sinopec Catalyst Qilu Branch, with a dry basis content of 3kg), ZSM-5 molecular sieves (purchased from Sinopec Catalyst Qilu Branch, with a dry basis content of 0.8kg), oxidation Zinc powder (purchased from Headhorse Company, purity 99.7%, 0.66kg) was mixed with 6.57kg deionized water, and after stirring for 30 minutes, a mixed slurry containing USY molecular sieve, ZSM-5 molecular sieve and zinc oxide was obtained;

[0145] (2) kaolin (purchased from Suzhou Kaolin Factory S1 series, with a dry basis content of 1.5kg) and pseudoboehmite (purchased from Aluminum Corporation of China Shandong Branch, with a dry basis content of 1.35kg) were stirred and mixed, and then added 5.6kg of deionized water was mixed evenly, and then 500mL of hydrochloric acid (concentration of 30% by weight, purchased from Beijing Che...

Embodiment 2

[0150] This example is used to illustrate the hydrocracking catalyst and its preparation method of the present invention.

[0151] (1) PREHY molecular sieve (purchased from Sinopec Catalyst Qilu Branch, with a dry basis content of 4.6kg), ZRP molecular sieve (purchased from Sinopec Catalyst Qilu Branch, with a dry basis content of 1.2kg), magnesium oxide Powder (purchased from Weifang Lihe Powder Technology Co., Ltd., with a purity of more than 95%, 1.26 kg) was mixed with 8.6 kg of deionized water, and stirred for 30 minutes to obtain a mixed slurry containing PREHY molecular sieve, ZRP molecular sieve and magnesium oxide;

[0152] (2) Expanded perlite (purchased from Mantanghong Abrasives Factory in Gongyi City, with a dry basis content of 2.06kg, 30-60 mesh) and pseudo-boehmite (purchased from China Aluminum Shandong Branch, with a dry basis content of 1.48kg) was stirring and mixing, then added 5.6kg of deionized water and mixed evenly, then added 500mL of hydrochloric aci...

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Abstract

The invention relates to the field of hydrocracking, in particular to a method and system for online circulation regeneration of a hydrocracking catalyst. The method comprises: continuously sending the raw catalyst after catalytic feedstock oil and hydrogen hydrocracking in the pressurized fluidized bed reactor to the first stripper for hydrogen stripping; Then sent to the catalyst regenerator for heating and oxidation with oxygen; then sent to the second stripper for steam or nitrogen stripping; the obtained catalyst was sent to the lock hopper to be balanced by hydrogen purge, and then entered the reducer Regenerated catalyst obtained by hydrogen reduction is recycled to the pressurized fluidized bed reactor for further use in catalytic hydrocracking of a mixture stream containing heavy feed oil and a source of hydrogen. The regeneration method of the present invention can realize the on-line circulation regeneration of the hydrocracking catalyst, and can better promote the high conversion rate and high selectivity of catalytic diesel oil to produce liquefied gas and low-sulfur high-octane gasoline.

Description

technical field [0001] The invention relates to the field of hydrocracking, in particular to a method and system for online circulation regeneration of a hydrocracking catalyst. Background technique [0002] The existing low-quality catalytic diesel oil is used as light cycle oil in the catalytic cracking unit for refining operation to generate gasoline, cracked gas and coke. Although it can be partially converted, the selectivity of gasoline is low, and the yield of coke and dry gas is too high , low economic benefit. In recent years, in order to meet the requirements of environmental protection and improving economic benefits, many technologies use hydrocracking technology to improve low-quality diesel oil. The upgrading of existing low-quality light diesel oil adopts medium-pressure hydrogenation upgrading to increase cetane number and remove sulfur and nitrogen. However, catalytic diesel oil and coked diesel oil with high aromatic content are used as raw materials, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J8/26C10G45/12C10G45/20
Inventor 于敬川毛安国刘宪龙郭大为
Owner CHINA PETROLEUM & CHEM CORP
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