Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for further processing medium and low temperature coal tar

A low-temperature coal tar and deep processing technology, applied in the field of coal chemical industry, can solve problems such as affecting the thermal stability of oil products, affecting the service life of catalysts, and not being able to be removed in large quantities, so as to prolong the service life, improve catalytic activity, and improve properties. Effect

Inactive Publication Date: 2012-11-21
CHINA COAL ENERGY HEILONGJIANG COAL CHEM +1
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the whole fraction of coal tar should not be put into the delayed coking unit, but the light fraction should be separated first, and only the delayed coking reaction of the heavy fraction of coal tar should be carried out, so as to prevent the lighter fraction from reacting into heavy fraction or dry gas, which will affect liquid products yield
Although delayed coking can remove some impurities such as sulfur and nitrogen in coal tar, a large part of it remains in the coking distillate and cannot be removed in large quantities, and it will still cause environmental pollution during combustion
More importantly, coked distillate oil contains more olefins and colloids, which will affect the thermal stability of the oil and cause engine damage
[0007] In short, the distillate after delayed coking is easy to affect the service life of the catalyst during the hydrogenation reaction

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for further processing medium and low temperature coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The low-temperature dry distillation coal tar of Yilan lignite, whose properties are shown in Table 1, is sent to the pretreatment unit to remove mechanical impurities and water, and then enters the atmospheric fractionation tower to fractionate light distillate oil (top oil), bottom oil and phenol oil ( The phenolic oil extracted from the side line), the phenolic oil enters the phenolic oil extraction device to separate phenolic products and dephenolized oil. The bottom oil of the atmospheric pressure column enters the vacuum fractionation tower, and the heavy fraction is distilled from the top of the tower and the side line, and the tailing bitumen is distilled from the bottom of the tower. The dephenolized oil, heavy fraction and light fraction oil from the atmospheric fractionation tower are mixed and then enter the hydrofinishing unit for hydrofinishing reaction. The gasoline and diesel oil obtained from the hydrofinishing reaction can exit the unit, and the wax oil...

Embodiment 2

[0041] The low-temperature dry distillation coal tar of Yilan lignite, whose properties are shown in Table 1, is sent to the pretreatment unit to remove mechanical impurities and water, and then enters the atmospheric fractionation tower to fractionate light distillate oil (top oil), bottom oil and phenol oil ( The phenolic oil extracted from the side line), the phenolic oil enters the phenolic oil extraction device to separate phenolic products and dephenolized oil. The bottom oil of the atmospheric pressure column enters the vacuum fractionation tower, and the heavy fraction is distilled from the top of the tower and the side line, and the tailing bitumen is distilled from the bottom of the tower. The dephenolized oil, heavy fraction and light fraction oil from the atmospheric fractionation tower are mixed and then enter the hydrofinishing unit for hydrofinishing reaction. The gasoline and diesel oil obtained from the hydrofinishing reaction can exit the unit, and the wax oil...

Embodiment 3

[0043] The low-temperature dry distillation coal tar of Yilan lignite, whose properties are shown in Table 1, is sent to the pretreatment unit to remove mechanical impurities and water, and then enters the atmospheric fractionation tower to fractionate light distillate oil (top oil), bottom oil and phenol oil ( The phenolic oil extracted from the side line), the phenolic oil enters the phenolic oil extraction device to separate phenolic products and dephenolized oil. The bottom oil of the atmospheric pressure column enters the vacuum fractionation tower, and the heavy fraction is distilled from the top of the tower and the side line, and the tailing bitumen is distilled from the bottom of the tower. The dephenolized oil, heavy fraction and light fraction oil from the atmospheric fractionation tower are mixed and then enter the hydrofinishing unit for hydrofinishing reaction. The gasoline and diesel oil obtained from the hydrofinishing reaction can exit the unit, and the wax oil...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for further processing medium and low temperature coal tar, which comprises the following steps: (a) fractionating coal tar to obtain light fraction, carbolic oil, heavy fraction and tail asphalt; (b) dephenolizing the carbolic oil to obtain phenolic products and dephenolized oil; (c) hydrogenating the dephenolized oil, the light fraction and the heavy fraction toobtain dry gas, liquefied gas, hydrogenated naphtha and hydrogenated diesel;(d) and catalyzing, reforming and carrying out aromatics extraction on the hydrogenated naphtha to obtain benzene, toluene,dimethylbenzene and solvent naphtha. Compared with the prior art, the method for further processing medium and low temperature coal tar can prolong the service life of a catalyst and enhance the catalytic activity by removing the tail asphalt from the coal tar before hydrogenation.

Description

technical field [0001] The invention relates to a coal chemical process, in particular to a medium-low temperature coal tar deep processing method, which belongs to the field of coal chemical industry. Background technique [0002] Coal dry distillation and coal gasification are important components of the coal chemical process, and the raw materials are mostly non-caking coal or weakly caking coal. Non-caking coal or weakly caking coal includes lignite, long-flame coal and gas coal. Lignite is the coal with the lowest degree of coalification. It has high moisture, low specific gravity, high volatile content, non-caking, strong chemical reactivity, poor thermal stability, low calorific value, and contains different amounts of humic acid. It is mostly used as fuel , The raw material of gasification can also be used to extract montan wax and humic acid to make sulfonated coal or activated carbon. Long-flame coal also has a high volatile content, has no or only a small amount...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/16C10G65/12C10G61/04
Inventor 姜殿臣秦利彬沈和平赵长林韩雪冬李增文于寿龙杨承强
Owner CHINA COAL ENERGY HEILONGJIANG COAL CHEM