Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Deep processing method for medium and low temperature coal tar

A technology for deep processing of low-temperature coal tar, which is applied in the field of coal chemical technology, can solve problems such as engine damage, reduce economic benefits, and environmental pollution, and achieve the effects of improving the properties of oil products, increasing service life, and increasing economic benefits

Active Publication Date: 2013-01-30
上海竣铭化工工程设计有限公司
View PDF5 Cites 18 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 1. Phenols will corrode the delayed coking device and affect the service life of the equipment after the dephenolization is placed in the delayed coking
[0007] 2. The delayed coking scheme will reduce the liquid yield of the target product and reduce economic benefits
Moreover, although delayed coking can remove some impurities such as sulfur and nitrogen in coal tar, a large part 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

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
  • Deep processing method for medium and low temperature coal tar
  • Deep processing method for medium and low temperature coal tar
  • Deep processing method for medium and low temperature coal tar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The low-temperature dry distillation coal tar from lignite in Shenmu County, whose properties are shown in Table 1, is sent to the pretreatment unit to remove mechanical impurities and water, and then enters the vacuum fractionation tower 1 to fractionate light distillate oil (overhead oil) and heavy distillate oil (side stream) , phenol oil (side line) and heavy oil, the phenol oil enters the phenol oil extraction unit 2 to separate phenolic products and dephenolized oil, and the heavy oil at the bottom of the tower is mixed with the unconverted tail oil of the hydrocracking section and enters the delayed coking unit 3 for thermal cracking reaction Coking dry gas, liquefied petroleum gas, coking naphtha, coking diesel oil, coking wax oil and petroleum coke are produced with a reaction temperature of 465°C and a reaction pressure of 0.23MPa. Among them, the coked naphtha, coked diesel oil, coked wax oil, light distillate oil from the fractionation tower 1, dephenolized o...

Embodiment 2

[0032] The low-temperature dry distillation coal tar from lignite in Shenmu County, whose properties are shown in Table 1, is sent to the pretreatment unit to remove mechanical impurities and water, and then enters the vacuum fractionation tower 1 to fractionate light distillate oil (overhead oil) and heavy distillate oil (side stream) , phenol oil (side line) and heavy oil, the phenol oil enters the phenol oil extraction unit 2 to separate phenolic products and dephenolized oil, and the heavy oil at the bottom of the tower is mixed with the unconverted tail oil of the hydrocracking section and enters the delayed coking unit 3 for thermal cracking reaction Coking dry gas, liquefied petroleum gas, coking naphtha, coking diesel oil, coking wax oil and petroleum coke are produced with a reaction temperature of 480°C and a reaction pressure of 0.17MPa. Among them, the coked naphtha, coked diesel oil, coked wax oil, light distillate oil from the fractionation tower 1, dephenolized o...

Embodiment 3

[0034] The low-temperature dry distillation coal tar from lignite in Shenmu County, whose properties are shown in Table 1, is sent to the pretreatment unit to remove mechanical impurities and water, and then enters the vacuum fractionation tower 1 to fractionate light distillate oil (overhead oil) and heavy distillate oil (side stream) , phenol oil (side line) and heavy oil, the phenol oil enters the phenol oil extraction unit 2 to separate phenolic products and dephenolized oil, and the heavy oil at the bottom of the tower is mixed with the unconverted tail oil of the hydrocracking section and enters the delayed coking unit 3 for thermal cracking reaction Coking dry gas, liquefied petroleum gas, coking naphtha, coking diesel oil, coking wax oil and petroleum coke are produced with a reaction temperature of 500°C and a reaction pressure of 0.17MPa. Among them, the coked naphtha, coked diesel oil, coked wax oil, light distillate oil from the fractionation tower 1, dephenolized o...

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 deep processing method for medium and low temperature coal tar. The medium and low temperature coal tar raw material is pretreated and fractionated to obtain the light distillates, phenol oil, heavy distillates and heavy oil; the phenol oil is subjected to dephenolization to obtain phenol produces and dephenolized oil; bottom heavy oil and unconverted tail oil from a hydrocracking section are mixed and subjected to a coking reaction to obtain a variety of coking products; coking naphtha, coker diesel and coker gas oil from the coking products are mixed with light distillates, dephenolized oil and heavy distillates from raw material fractionation, and are subjected to hydrofining and hydrocracking reaction. Compared with the prior art, the method provided by the invention can produce clean gasoline and diesel fractions with stable performances. In addition, the method can produce a variety of chemical products with high additional value, realize the effective utilization of medium and low temperature coal tar, and greatly prolong operation cycle of the device.

Description

technical field [0001] The invention relates to a coal chemical process, in particular to a medium-low temperature coal tar deep processing process. 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, gas coal, etc. Lignite is a non-caking or weakly caking coal, and it is the coal with the lowest degree of coalification. Lignite is characterized by high moisture, low specific gravity, high volatile content, non-bonding, strong chemical reactivity, poor thermal stability, low calorific value, and contains varying amounts of humic acid. It is mostly used as fuel and raw material for gasification, and can also be used to extract montan wax, humic acid, and manufacture sulfonated coal or activated carbon. Long-flame coal also has a high volatile content, has...

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 Applications(China)
IPC IPC(8): C10G67/14
Inventor 王小英
Owner 上海竣铭化工工程设计有限公司
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com