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Method for producing gasoline and diesel by directly hydrogenating medium and low temperature coal tar

A low-temperature coal tar and coal tar technology, applied in the fields of oil refining, coal chemical industry and petrochemical industry, can solve the problems of high operating pressure and large investment, and achieve the effect of reducing operating pressure, reducing capital construction investment and saving hydrogen consumption.

Active Publication Date: 2015-07-22
SINOPEC NANJING ENG & CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this method is mainly to deal with heavy oil, the operating pressure is high, and the investment is large

Method used

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  • Method for producing gasoline and diesel by directly hydrogenating medium and low temperature coal tar
  • Method for producing gasoline and diesel by directly hydrogenating medium and low temperature coal tar
  • Method for producing gasoline and diesel by directly hydrogenating medium and low temperature coal tar

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Medium and low temperature coal tar adopts the combination of raw material pretreatment-hydrofinishing-PSA purification to produce clean gasoline and diesel products. The medium and low temperature coal tar first passes through the pretreatment unit to remove the oily wastewater and waste residue in the material, and the remaining liquid phase components are separated into heavy oil and hydrogenated raw material oil (final boiling point <480°C). The heavy oil is sent to the tank farm, and the hydrogenated raw oil is sent to the hydrofining unit. In the presence of hydrogen, the raw material oil for hydrogenation enters the protective reactor equipped with corresponding catalysts, the hydrofinishing reaction unit and the hydrocracking reaction unit for reaction, and the reaction product is sent to the three-phase high-pressure separation tank (that is, the high-separation tank 12), the gas phase in the tank is mixed with the dry gas produced by the subsequent separation ...

Embodiment 2

[0048] The raw materials, process flow and corresponding catalyst used are the same as in Example 1. The difference from Example 1 is the selected process conditions. The reaction process conditions are shown in Table 3, the properties of gasoline are shown in Table 4, and the properties of diesel oil are shown in Table 5.

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Abstract

The invention discloses a method for producing gasoline and diesel by directly hydrogenating medium and low temperature coal tar. The method comprises the steps that the medium and low temperature coal tar is firstly subjected to dehydration and deslagging, and then the liquid phase is separated into heavy oil and hydrogenated raw oil after undergoing fractionation; the hydrogenated raw oil and hydrogen are hydrogenated by a hydrofining unit after being mixed, and the treated product is subjected to oil, water and gas three-phase separation to obtain a hydrogen-rich gas, sulfur and ammonium containing sewage and hydrofined oil; the hydrofined oil is fractionated to obtain a dry gas, a gasoline fraction, a diesel fraction and a liquefied gas; and the hydrogen-rich gas and the dry gas are sent to a PSA (pressure swing adsorption) purification unit to be treated after being mixed, and the hydrogen obtained after purification is returned to the hydrofining unit to be recycled. By adopting the method, coal tar resources can be fully utilized, and the coal tar is furthest converted to the light oil products, thus improving the utilization rate of the coal tar.

Description

technical field [0001] The invention belongs to the fields of oil refining, petrochemical industry and coal chemical industry, and specifically relates to a method for directly hydrogenating medium and low temperature coal tar to produce gasoline and diesel oil, more specifically, a method for using raw material pretreatment and hydrogenation of medium and low temperature coal tar Clean gasoline and diesel products are produced by combining the three processes of refining and PSA purification. Background technique [0002] Coal tar is a liquid product obtained in the process of carbonization of coal. According to the temperature of carbonization, it can be divided into high-temperature coal tar, medium-temperature coal tar and low-temperature coal tar. Their composition and properties are very different. In my country, due to the low output of coal tar in a single enterprise and the geographical dispersion of coal tar producing enterprises, coal tar resources have not been f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 王楠郑战利陈金樑崔保顺张凤娇芦霄然李敏
Owner SINOPEC NANJING ENG & CONSTR
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