Hydro-desulphurizing combined method

A combined method, hydrodesulfurization technology, applied in the fields of hydroprocessing process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of high operating cost and high total investment cost, achieve low operating cost, save new hydrogen compressors, The effect of saving equipment

Active Publication Date: 2009-04-22
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
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Problems solved by technology

[0005] In the prior art, the two processes of wax oil hydrotreating and hydrofining are operated separately. Although the purpose requirements can be met, since the two sets of

Method used

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  • Hydro-desulphurizing combined method

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Embodiment Construction

[0019] First, wax oil hydrotreating feed oil 1 and hydrogen gas 2 are mixed into hydrotreating reactor 3 to obtain hydrotreating product 4 containing low impurities such as sulfur and nitrogen. 4 is separated in hot high-pressure separator 5 to obtain liquid hydrogenation The wax oil directly enters the catalytic cracking unit, and the separated gas phase (including hydrogen and light distillate oil) 7 is mixed with the hydrorefined diesel feedstock 8 and enters the hydrorefining reactor 9 . After a series of reactions, the hydrorefining product 10 is obtained. Hydrofining product 10 is separated in high-pressure separator 11 to obtain hydrogen sulfide-containing gas 12 into dehydrogen sulfide tower 13, and recycle gas 14 obtained after dehydrogen sulfide is pressurized by recycle hydrogen compressor 15 and mixed with new hydrogen 16 recycle. The liquid 17 separated in the high-pressure separator 11 enters the stripper 18 (if there are more gasoline fractions in 8, it can be ...

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Abstract

The invention discloses a hydroprocessing and desulfurizing integration method, in particular a wax oil hydroprocessing and diesel hydrorefining integration process method. The method comprises the following steps: raw wax oil passes through a first reaction zone in the presence of hydrogen first, liquid obtained after separation of products is taken as catalytic cracking raw materia; hydrogen-containing gas and gas phase of light liquid obtained after separation are mixed with diesel raw material to enter a second reaction zone; and gas after separation of products in the second reaction zone is recycled after desulfurization, and liquid obtained after separation is subjected to fractionation to obtain hydrogenant naphtha and hydrogenant diesel. The method aims at technical characteristics of wax oil hydroprocessing and hydrorefining, integrates the two technologies for application, simplifies process flow, simplifies the process flow at the same time of meeting the same product requirements, and reduces equipment, investment and operating cost. The method is applied to newly built equipment to reduce equipment investment and applied to expanding reformation of the prior devices.

Description

technical field [0001] The invention relates to a hydrodesulfurization combined method, in particular to a combined hydrodesulfurization method for hydrocarbon raw materials with different distillation ranges. Background technique [0002] At present, with the continuous development of the world economy and increasingly stringent environmental protection regulations, it is necessary to produce a large amount of light and clean fuels, all of which require the perfection and improvement of the existing refining technology to produce products that meet the requirements at the lowest cost. With the increasing shortage of crude oil resources and the development of heavy and inferior quality, catalytic cracking (FCC) and coking have become important means of producing light fuel products, but the quality of products obtained by these two processes is generally difficult to meet strict index indicators Require. In the quality system of light fuel products, sulfur content is the mo...

Claims

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Application Information

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IPC IPC(8): C10G65/04
Inventor 曾榕辉刘涛关明华石友良廖娜孙洪江吴子明
Owner CHINA PETROLEUM & CHEM CORP
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