Hydrotreatment and catalytic cracking deeply-combined method for residuum

A technology of hydrotreating and catalytic cracking, which is applied in the fields of hydrotreating process, petroleum industry, and processing hydrocarbon oil, etc. It can solve the problems of unsatisfactory high-quality diesel products, limited naphtha diesel yield, and reduced total yield of gasoline products. To achieve the effects of reducing the difficulty of hydrogenation reaction and processing severity, increasing the yield of high value-added products, improving logistics distribution and mass transfer

CN102732315AInactive Publication Date: 2012-10-17CHINA PETROLEUM & CHEM CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-10-17
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a hydrotreatment and catalytic cracking deeply-combined method for residuum. The hydrotreatment and catalytic cracking deeply-combined method for residuum comprises the following steps that a residuum raw material, at least part of catalytically cracked heavy recycle oil and at least part of catalytically cracked slurry undergo a hydrotreatment reaction in the presence of hydrogen and a hydrotreatment catalyst in a hydrotreatment device; a hydrotreatment reaction effluent is subjected to gas-liquid separation; a liquid phase directly enters into a catalytic cracking device without passing through a fractionation device and then undergoes a catalytic cracking reaction; a catalytic cracking reaction effluent is treated by the fractionation device so that dry gas, liquefied gas, a catalytically cracked gasoline fraction, a catalytically cracked diesel fraction, catalytically cracked heavy recycle oil and catalytically cracked slurry are separated out; and a part or all of the catalytically cracked heavy recycle oil and the catalytically cracked slurry are fed back to the hydrotreatment device and then undergo a hydrotreatment reaction. Compared with the prior art, the hydrotreatment and catalytic cracking deeply-combined method for residuum can realize maximum-yield production of gasoline, save an equipment investment, fully utilize reaction heat and reduce production energy consumption.
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Description

technical field

[0001] The invention relates to a method for lightening residual oil, in particular to a method for lightening residual oil by deeply combining residual oil hydrotreating technology and catalytic cracking technology. Background technique

[0002] As crude oil becomes heavier and worse, more and more residual oil needs to be processed. Residual oil generally refers to crude oil or hydrocarbon materials from other sources. After vacuum distillation, gasoline fraction, diesel fraction, and vacuum distillate oil are removed. The remaining part after waiting for the fraction generally has the characteristics of high boiling point and high impurity content, and is the most difficult raw material to process in the oil refining industry. The processing of residual oil is not only to crack it into products with low boiling point, such as naphtha, middle distillate oil and vacuum gas oil, etc., but also to increase their hydrogen-carbon ratio, which requires decarburiz...

Examples

Embodiment

[0035] This embodiment adopts the combined method of residual oil hydrotreating and catalytic cracking provided by the present invention, and all liquid phase products of hydrotreating (that is, hydrogenated oil) directly enter the catalytic cracking unit without fractionation, and the catalytic cracking reaction effluent is fractionated to dry Gas, liquefied gas, catalytic cracking gasoline fraction, catalytic cracking diesel fraction, catalytic cracking cycle oil and catalytic oil slurry, among which the obtained catalytic cracking heavy cycle oil and catalytic oil slurry are all circulated into the hydrotreating unit for hydroprocessing, and introduced The FCC heavy cycle oil and oil slurry obtained from other catalytic cracking units are used, so that the total FCC heavy cycle oil and oil slurry can reach 30% of the residual oil feed, and straight-run wax oil is omitted as the diluent oil of the residual oil . Residue hydrogenation raw material oil is Middle East mixed res...