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A kind of technological method of producing clean diesel oil

A process method and diesel technology, which are applied in the petroleum industry, hydrotreating process, hydrocarbon oil treatment and other directions, can solve the problems of increasing the investment cost of the reactor, and achieve the effects of improving the hydrogen dissolving capacity, good technical effect and simple process flow.

Active Publication Date: 2016-11-16
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These patented technologies are characterized by the removal of H in the reactor 2 S and NH 3 , increasing the reactor investment cost

Method used

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  • A kind of technological method of producing clean diesel oil
  • A kind of technological method of producing clean diesel oil
  • A kind of technological method of producing clean diesel oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The mixed diesel raw material 1 passes through the heating furnace to reach the required temperature and fully mixes and dissolves the hydrogen in the gas-liquid mixer, then enters the first hydrogenation reactor. The reaction conditions are: reaction system pressure 7.5MPa, reaction temperature 350℃, converted to hydrogen The volume ratio is 200:1. Part of the effluent enters the circulation pipeline and is circulated to the first and second reverse inlets through the liquid circulation pump. The circulation ratio is 1:1, and part of it directly enters the second hydrogenation reactor. The reaction conditions are: reaction system pressure 7.5MPa, reaction temperature 350°C, converted hydrogen to oil volume ratio is 200:1, part of the effluent enters the circulation pipeline and circulates to the first and second reverse inlets through the liquid circulation pump, the circulation ratio is 1:1, and part of it enters the first separator Carry out gas-liquid separation, the...

Embodiment 2

[0041] The mixed diesel raw material 2 goes through the heating furnace to reach the required temperature and fully mixes and dissolves the hydrogen in the gas-liquid mixer, and then enters the first hydrogenation reactor. The volume ratio is 210:1. Part of the effluent enters the circulation pipeline and is circulated to the first and second reverse inlets through the liquid circulation pump. The circulation ratio is 1:1, and part of it directly enters the second hydrogenation reactor. The reaction conditions are: reaction system pressure 7.5MPa, reaction temperature 355℃, converted hydrogen to oil volume ratio is 210:1, part of the effluent enters the circulation pipeline and circulates to the first and second reverse inlets through the liquid circulation pump, the circulation ratio is 1:1, and part of it enters the first separator Carry out gas-liquid separation, the separated liquid effluent enters the third reactor, the reaction conditions are: the reaction system pressure...

Embodiment 3

[0044] The mixed diesel raw material 3 passes through the heating furnace to reach the required temperature and fully mixes and dissolves hydrogen in the gas-liquid mixer before entering the first hydrogenation reactor. The reaction conditions are: reaction system pressure 7.5MPa, reaction temperature 360°C, converted to hydrogen oil The volume ratio is 225:1. Part of the effluent enters the circulation pipeline and is circulated to the first and second reverse inlets through the liquid circulation pump. The circulation ratio is 2:1, and part of it directly enters the second hydrogenation reactor. The reaction conditions are: reaction system pressure 7.5MPa, reaction temperature 360°C, converted hydrogen to oil volume ratio is 225:1, part of the effluent enters the circulation pipeline and circulates to the first and second reverse inlets through the liquid circulation pump, the circulation ratio is 2:1, and part of it enters the first separator Carry out gas-liquid separation,...

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Abstract

The invention relates to a technique for producing clean diesel. The technique comprises the steps as follows: raw material oil is mixed with hydrogen after being heated, enters a first reactor, and is subjected to conventional hydrotreating reaction under a hydrotreating condition; a liquid-phase effluent directly enters a circulating oil pipeline to circulate, or directly enters a second heating furnace or enters the second heating furnace after being mixed with circulating oil, and is subjected to conventional hydrotreating reaction in a second reaction; the liquid-phase effluent directly enters a third heating furnace or enters the third heating furnace after being mixed with the circulating oil, or directly enters the circulating oil pipeline for circulation, or enters a first separator to be separated; the separated liquid oil enters the circulating oil pipeline for circulation, or enters the third heating furnace through an oil pump; a liquid-phase material is subjected to mild hydrocracking or hydro-upgrading reaction in the third reactor; and a liquid effluent enters a second separator to be separated. According to the method, ultra-low sulfur clean diesel of which the sulfur content is smaller than 10mu g / g can be produced.

Description

technical field [0001] The invention relates to a process for producing clean diesel oil. Background technique [0002] CN1566284A discloses a method for increasing the cetane number of diesel oil while reducing its aromatic content. Diesel feedstock and hydrogen enter the first reactor and contact with the non-precious metal hydrogenation upgrading catalyst. The reaction effluent from the reactor is separated to obtain a diesel product. Although this method can obtain a good effect of dearomatization, the process flow is relatively complicated, and the investment and operation costs are relatively high. [0003] In the traditional fixed-bed hydrogenation process, in order to remove impurities such as sulfur, nitrogen, oxygen, and metals in the raw material or reduce the size of the raw oil molecule, catalytic hydrogenation reaction is required. In this process, a large volume ratio of hydrogen to oil is usually used, and there must be a large amount of hydrogen surplus a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
CPCC10G67/00C10G2400/04
Inventor 马守涛张志华于春梅孙发民田然王刚赵野张文成李凤铉宋金鹤张铁珍董春明刘宇关旭葛冬梅刘丽军刘丽莹王艳萍张学佳
Owner PETROCHINA CO LTD
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