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Heavy raw oil hydrocracking method and system

A hydrocracking and raw oil technology, applied in chemical instruments and methods, hydrotreating process, hydrocarbon oil treatment, etc., can solve the problems of adding fixed bed hydrotreating reactors, high cost, etc., and achieve conversion rate and selectivity The effect of high and low hydrogen consumption

Active Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • Heavy raw oil hydrocracking method and system
  • Heavy raw oil hydrocracking method and system
  • Heavy raw oil hydrocracking method and system

Examples

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preparation example Construction

[0072] 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.

[0073] 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.

[0074] 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

[0152] This example is used to illustrate the hydrocracking catalyst and its preparation method of the present invention.

[0153] (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;

[0154] (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

[0159] This example is used to illustrate the hydrocracking catalyst and its preparation method of the present invention.

[0160] (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;

[0161] (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 heavy raw oil hydrocracking method and system. The method comprises the following steps: raw oil and hydrogen are heated to obtain a mixture; then the mixture is sent to a pressurized fluidized bed reactor to be in contact with a catalyst for reaction; a product is fed to a high-pressure separator for high-pressure separationto obtain a light component and a heavy component; separation treatment is performed on the light component to obtain a circulating hydrogen material flow as a part of hydrogen source; the heavy component is sent to a rectifying tower for rectification so as to separate to obtain gasoline; the gasoline is sent to a second rectifying tower for rectification so as to separate to obtain light gasoline; the light gasoline is sent to an aromatic hydrocarbon extraction unit for extraction to obtain light aromatics and raffinate oil; part of diesel and part of heavy gasoline are used as part of heavyraw oil; and a to-be-generated catalyst is sent to a catalyst regeneration unit for regeneration so as to obtain a regenerated catalyst, and the regenerated catalyst is circulated to the pressurizedfluidized bed reactor. The heavy raw oil hydrocracking method can be used for high conversion rate and high selectivity preparation of BTX by catalysis of diesel at relatively low hydrogen consumption.

Description

technical field [0001] The invention relates to the field of hydrocracking, in particular to a method and system for hydrocracking of heavy feedstock oil. 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, which require high hydrogen...

Claims

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Application Information

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IPC IPC(8): C10G67/02B01J29/46B01J35/02B01J35/10
Inventor 于敬川毛安国刘宪龙郭大为
Owner CHINA PETROLEUM & CHEM CORP
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