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Distillate oil hydro-upgrading method

A technology for hydrotreating and upgrading distillate oil, which is applied in hydrotreating process, petroleum industry, processing of hydrocarbon oil, etc., can solve the problems of increasing the investment cost of the reactor, and achieve the advantages of good product properties, stable operation and simple process flow. Effect

Active Publication Date: 2014-12-24
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 hydrogen sulfide and ammonia in the reactor, increasing the investment cost of the reactor

Method used

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  • Distillate oil hydro-upgrading method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The reformed raw material 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 reaction conditions are: reaction system pressure 1.2MPa, reaction temperature 256°C, converted hydrogen oil volume The ratio is 20:1, the effluent 2 enters the second hydrogenation reactor, the reaction conditions are: the reaction system pressure is 1.2MPa, the reaction temperature is 254°C, the converted hydrogen-oil volume ratio is 20:1, the effluent enters the separator for gas-liquid Separation, the separated liquid effluent enters the storage tank. The raw material oil properties and product properties are listed in Table 2.

[0039] It can be seen from Table 2 that the sulfur, nitrogen and olefin content in the reforming raw material can be significantly reduced by adopting this technology.

Embodiment 2

[0041] The mixed diesel raw material 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 reaction conditions are: reaction system pressure 8.0MPa, reaction temperature 350°C, converted hydrogen oil volume The ratio is 76:1, the effluent enters the second hydrogenation reactor, the reaction conditions are: the reaction system pressure is 8.0MPa, the reaction temperature is 350°C, the converted hydrogen oil volume ratio is 76:1, the effluent enters the separator for gas-liquid separation , the separated liquid effluent enters the storage tank. The raw material oil properties and product properties are listed in Table 3.

[0042] It can be seen from Table 3 that the sulfur and nitrogen content in the blended diesel can be significantly reduced by using this technology.

Embodiment 3

[0044] The paraffin-based heavy distillate oil (mixed with coking wax oil) goes through the heating furnace to reach the required temperature and fully mixes and dissolves with hydrogen in the gas-liquid mixer, and then enters the first hydrogenation reactor. The reaction conditions are: reaction system pressure 15.0MPa , The reaction temperature is 385°C, the converted hydrogen-to-oil volume ratio is 350:1, and the effluent enters the second hydrogenation reactor; the reaction conditions are: the reaction system pressure is 15.0MPa, the reaction temperature is 383°C, and the converted hydrogen-to-oil volume ratio is 350:1 , the effluent enters the separator for gas-liquid separation, and the separated liquid effluent enters the storage tank. The raw material oil properties and product properties are listed in Table 4.

[0045] It can be seen from Table 4 that the sulfur and nitrogen content in heavy distillate oil can be significantly reduced by using this technology.

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PUM

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Abstract

The invention relates to a distillate oil hydro-upgrading method which comprises the following steps: mixing stock oil and hydrogen at a hydrogen-oil volume ratio of (10-100):1, and feeding a mixture into a first reactor from the bottom of the first reactor; feeding generated oil and supplemental hydrogen into a second reactor from the bottom of the second reactor; and feeding the generated oil into a gas-liquid separator and performing steam stripping separation so as to separate out liquid oil and a gas, wherein a catalyst used for the first reactor is a hydrotreating catalyst mainly for denitrification over desulfuration, a catalyst used for the second reactor is the same as the catalyst used for the first reactor or is a hydrotreating catalyst mainly for desulfuration over denitrificationl, and the conditions of a hydrogenation process are as follows: the reaction pressure is 6.0-17.0 MPa, the reaction temperature is 300-400 DEG C, and the volumetric space velocity is 0.1-3.0 h<-1>. The distillate oil hydro-upgrading method disclosed by the invention can be used for producing a diesel oil product with sulfur content less than 10 micrograms / gram by virtue of hydro-upgrading of inferior diesel oil.

Description

technical field [0001] The invention relates to a process method for hydrogenation and upgrading of distillate oil. Background technique [0002] Heavy distillates are generally referred to as vacuum distillates (VGO), coker heavy distillates (CGO) or deasphalted oils (DAO). Due to the heavy distillation range, it contains more impurities such as sulfur, nitrogen and heavy metals. When used as raw material for downstream catalytic cracking or hydrocracking, it will reduce the activity of the catalyst, and even affect the stable operation of the device in severe cases. The resulting oil after hydrotreatment of heavy distillate oil has the characteristics of low content of impurities such as sulfur and nitrogen, and can be used as raw material for downstream catalytic cracking units or hydrocracking units. [0003] With the heavy and inferior quality of crude oil, the content of impurities such as sulfur and nitrogen in heavy distillate oil is getting higher and higher, whic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G65/04
Inventor 张志华马守涛田然于春梅王刚赵野孙发民李凤铉吴显军李瑞峰张铁珍董春明丁燕关旭赵檀张学佳刘丽莹王艳萍刘丽军马宝利
Owner PETROCHINA CO LTD