Hydrogenation method capable of producing diesel oil and chemical materials flexibly

A technology for chemical raw materials and diesel oil, which is applied in the field of hydrogenation that can flexibly produce diesel and chemical raw materials, and can solve problems such as poor flexibility, inability to meet the requirements of Euro IV fuel specifications, and high sulfur content in diesel products

Active Publication Date: 2008-02-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method organically combines medium-pressure hydrocracking and catalytic cracking processes, but the flexibility of product structure adjustment is poor, and its diesel products have high sulfur content, which cannot meet the requirements of Euro IV fuel specifications

Method used

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  • Hydrogenation method capable of producing diesel oil and chemical materials flexibly
  • Hydrogenation method capable of producing diesel oil and chemical materials flexibly

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0016] Preferred embodiment one (the embodiment that produces high-quality diesel oil in a large amount):

[0017] After the heavy raw material is mixed with hydrogen, it enters the first hydrogenation reaction zone and the second hydrogenation reaction zone successively, and reacts with the hydrotreating catalyst I and the hydrocracking catalyst respectively, and the reaction product in the second hydrogenation reaction zone does not After being separated and mixed with the light raw material, it enters the third hydrogenation reaction zone and reacts with the hydrogenation catalyst II, wherein the weight ratio of the heavy raw material to the light raw material is preferably 1:1-9:1. The reaction product in the third hydrogenation reaction zone is cooled, separated and fractionated to obtain light naphtha fraction, heavy naphtha fraction, diesel fraction and tail oil fraction. Part or all of the tail oil fraction can be recycled to the second hydrogenation reaction zone for ...

Embodiment approach 2

[0018] Preferred embodiment two (the embodiment that produces chemical raw material in a large amount):

[0019] Heavy raw material and light raw material, the weight ratio of heavy raw material and light raw material is preferably 1:1~9:1, after being mixed with hydrogen, enter the first hydrogenation reaction zone, the second hydrogenation reaction zone and the third The hydrogenation reaction zone is respectively contacted with the hydrotreating catalyst I, the hydrocracking catalyst and the hydrotreating catalyst II to react, the intermediate reaction product is not separated, and the final reaction product is cooled, separated and fractionated to obtain light Naphtha fraction, heavy naphtha fraction, diesel fraction and tail oil fraction, wherein part or all of the diesel fraction can be recycled to the second hydrogenation reaction zone for hydrocracking reaction again to increase the yield of heavy naphtha fraction, and the remaining Part of the diesel fraction extracti...

Embodiment 1

[0041] This embodiment adopts the preferred embodiment one, that is, the embodiment of producing diesel oil in a large amount. After the heavy raw material is mixed with hydrogen, it passes through the first hydrogenation reaction zone and the second hydrogenation reaction zone successively, and is respectively mixed with the hydrotreating catalyst 1 and the second hydrogenation reaction zone. Hydrocracking catalyst contact reaction, the reaction effluent mixed with light raw materials enters the third hydrogenation reaction zone, and undergoes hydrogenation reaction under the action of hydrotreating catalyst II, and the reaction effluent of the third hydrogenation reaction zone passes through After cooling, separation and fractionation, light naphtha fraction, heavy naphtha fraction, diesel fraction and tail oil fraction are obtained. The weight ratio of heavy raw material to light raw material is 5:1. Based on the overall catalyst volume, the filling volume percentages of hy...

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Abstract

The present invention relates to a hydrogenation method for flexible production of diesel oil and chemical raw material, heavy raw material and optional light raw material mix with hydrogen, and enter into a first hydrogenation reaction area and a second hydrogenation reaction area, and contact with hydrogenation treatment catalyst I and hydrogenation cracking catalyst respectively and perform reaction. Without separation, the reactant mixes with the light raw material and enters into a third hydrogenation reaction area, under the action of hydrogenation treatment catalyst II, the mixture performs the reaction, through the reactant is cooled, separated and fractionated, the light naphtha distillate, the heavy naphtha distillate, the diesel oil distillate and the tail oil distillate can be got. The method provided by the present invention combines the hydrogenation treatment and the hydrogenation cracking organically, the heavy distillates such as decompression gas oil, etc. and the ungraded light distillate got from the second time processing are used as raw material, the operation can be adjusted flexibly according to the market demand, so as to produce high quality diesel oil or chemical raw material in the maximum volume, wherein the diesel oil can meet the requirement of Europe IV fuel specification.

Description

technical field [0001] The invention relates to a hydrocarbon oil cracking method for obtaining low-boiling fractions in the presence of hydrogen, more specifically, a hydrogenation method capable of flexibly producing diesel oil and chemical raw materials. Background technique [0002] With the continuous development of the national economy, my country's energy consumption continues to increase, and the establishment of an energy-saving and conservation-oriented society and the realization of sustainable development will become my country's long-term national policy. At present, transportation fuels such as gasoline and diesel for vehicles all come from petroleum, a non-renewable primary energy source. Moreover, compared with gasoline engines, diesel engines emit less carbon dioxide than gasoline engines, and their fuel consumption is about 30% lower than gasoline engines. Therefore, automobile dieselization will be the future development direction, and the demand for high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/12
Inventor 董建伟胡志海熊震霖王子健董松涛
Owner CHINA PETROLEUM & CHEM CORP
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