Parallel-flow hydrogenation method for producing intermediate fraction oil

A middle distillate oil and fraction technology, which is applied in the fields of hydrotreating process, petroleum industry, and hydrocarbon oil treatment, etc., can solve the problems of low reaction temperature, high activity of molecular sieve hydrocracking catalyst, and low yield of middle distillate oil, etc. Achieve the effects of improving yield, protecting activity and selectivity, and increasing sulfur content

Active Publication Date: 2014-01-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

Compared with amorphous hydrocracking catalysts, molecular sieve hydrocracking catalysts have high activity and low initial reaction temperature, but the yield of middle distillates is relatively low

Method used

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  • Parallel-flow hydrogenation method for producing intermediate fraction oil

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Comparison scheme
Effect test

Embodiment 1

[0034] When the reaction pressure is 14.5MPa, the reaction temperature of the hydrofinishing reactor is 380°C, the reaction temperature of the hydrocracking reactor is 368°C, and the volume space velocity of the hydrofinishing reactor (for fresh raw materials) is 1.8h -1 , the volumetric space velocity of the hydrocracking reactor (for all feeds to the hydrocracking reactor) is 1.3h -1 Under the reaction conditions, with the hydrocracking method provided by the present invention, the test was carried out using raw material A, the ratio of fresh feed oil entering the hydrofinishing reactor and the hydrocracking reactor was 10:1, and the tail oil fraction was all recycled back to Hydrocracking reactor. The hydrocracking reactor is provided with four catalyst beds, and the amount of fresh raw material at the inlet of each bed accounts for 25% by weight of the fresh raw material total amount of the hydrocracking reactor, and the H in the reaction atmosphere of the hydrocracking re...

Embodiment 2

[0036] When the reaction pressure is 14.5MPa, the reaction temperature of the hydrofinishing reactor is 380°C, the reaction temperature of the hydrocracking reactor is 360°C, and the volume space velocity of the hydrofinishing reactor (for fresh raw materials) is 1.8h -1 , the volumetric space velocity of the hydrocracking reactor (for all feeds to the hydrocracking reactor) is 1.3h -1 Under the reaction conditions, with the hydrocracking method that the present invention provides, adopt raw material A to carry out test, the ratio of fresh raw material oil entering hydrofinishing reactor and hydrocracking reactor is 20:1, tail oil fraction is all recycled back to Hydrocracking reactor. The hydrocracking reactor is provided with four catalyst beds, and the amount of fresh feed oil at the entrance of each bed accounts for 25% by weight of the fresh feed oil total amount of the hydrocracking reactor, and the H in the reaction atmosphere of the hydrocracking reactor 2 The partial...

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Abstract

The invention relates to a parallel-flow hydrogenation method for producing intermediate fraction oil, which comprises the following steps: fresh oil raw materials are simultaneously introduced into a hydrofining reactor and a hydrocracking reactor in a parallel-flow mode, wherein the fresh oil raw material entering the hydrocracking reactor is divided into a plurality of streams which are respectively fed among the beds of the hydrocracking reactor; and the reaction effluent of the hydrofining reactor is subjected to tail oil fraction separation and enters the hydrocracking reactor, and the reaction effluent of the hydrocracking reactor enters the hydrofining reactor together with part of the oil raw material. The method provided by the invention can treat heavy fraction oil, and maximally produce the intermediate fraction oil.

Description

technical field [0001] The invention belongs to a hydrocracking method for obtaining low-boiling distillate hydrocarbon oil in the presence of hydrogen. Background technique [0002] With the deterioration of crude oil quality year by year and the increasingly stringent environmental protection requirements worldwide, the hydrocracking process, as one of the main means of crude oil secondary processing and heavy oil lightening, has strong raw material applicability, flexible production plan, liquid With high product yield and good product quality, it is playing an increasingly important role in the deep processing of sulfur-containing and high-sulfur crude oil to produce clean fuels, and its application range is becoming more and more extensive. [0003] In recent years, the market demand for various oil products, especially high-quality middle distillate products, has continued to grow, and the pressure on refineries to produce high-quality middle distillate products has al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/00
Inventor 蔡珂胡志海蒋东红董建伟董松涛陈元君赵阳赵广乐王子文
Owner CHINA PETROLEUM & CHEM CORP
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