Dialkene-containing gasoline fraction hydrotreating method

A technology for hydrogenation treatment and gasoline fractionation, which is applied in the fields of hydrogenation treatment process, hydrocarbon oil treatment, petroleum industry, etc. It can solve the problems of coking of heat exchangers, etc., so as to increase the reaction speed of hydrogenation, improve the processing capacity, and improve the utilization of heat efficiency effect

Inactive Publication Date: 2012-07-11
何裕松
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Problems solved by technology

The feed of the first reactor of the method needs to be warmed up to the required temperature in the heat exchanger, although the first reactor inlet temperature is lower, the heat exchange tube wall temperature of t

Method used

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[0028] The present invention will be further described below in conjunction with preferred embodiments. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. The embodiment adopts a small constant-temperature fixed-bed reactor in a laboratory, and the hydrogen supply solvent is tetralin.

[0029] Table 1 Feedstock oil properties

[0030] Raw oil name Coking gasoline fraction Density (20℃), g·cm -3 0.7210 Distillation range, ℃ 40~200 Sulfur content, wt% 0.79 Nitrogen content, wt% 0.02 Diolefin, g-I 2 / 100g 4.8 Bromine value, gBr.100g -1 71.0 Aromatics, v% 9.8

[0031] Table 2 The main composition and properties of the catalyst

[0032] catalyst Hydrotreating pretreatment catalyst Hydrotreating catalyst Catalyst composition MoO 3 +NiO / wt% 12 20 Carrier Alumina Alumina The main properties of the catalyst Specific surface, m 2...

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Abstract

The invention provides a dialkene-containing gasoline fraction hydrotreating method. The method comprises the following steps: (1) directly mixing a dialkene-containing gasoline fraction raw material with a hot hydrogen-donor solvent, and feeding the mixture into a hydropretreating reactor for dialkene-removing reaction when the temperature of the mixture reaches the dialkene-removing reaction temperature; (2) mixing reaction effluent of the hydropretreating reactor with hydrogen gas, feeding the mixture into a heating furnace, heating the mixed material until the temperature of the mixed material reaches the temperature required by the inlet of the hydrotreating reactor, feeding the mixed material into a separator, separating the mixed material into a gas phase and a liquid phase, wherein the liquid phase is mainly the hydrogen-donor solvent and is circulated to the step (1) for use, and the separated gas phase is fed into the hydrotreating reactor so as to be subjected to hydrogenation impurity-removal reaction; and (3) feeding the reaction effluent of the hydrotreating reactor into a separation system, separating out the hydrotreated gasoline fraction and a gas phase, wherein the gas phase is mainly the hydrogen gas and is recycled. Compared with the prior art, the method provided by the invention can be used for effectively solving the coking problem of a dialkene-containing gasoline fraction hydrotreater.

Description

technical field [0001] The invention relates to a method for hydrogenation treatment of diolefin-containing gasoline fractions, in particular to a method for improving the operation period of a diolefin-containing gasoline fraction hydrogenation treatment unit. Background technique [0002] As crude oil continues to become heavier and the depth of crude oil processing continues to increase, the processing of heavy oil products is increasingly important in the refining process. Due to the simple technology and low investment, the delayed coking process is becoming more and more important for refiners to process residual oil and improve An important means of light oil yield. The main liquid phase products of coker distillates in the delayed coking process include coker naphtha and coker diesel oil. Due to the high content of unsaturated hydrocarbons, sulfur, nitrogen and other impurities in coking distillate oil, and its poor stability, it is difficult to be used as the feeds...

Claims

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Application Information

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IPC IPC(8): C10G67/02
Inventor 何裕松
Owner 何裕松
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