Pretreatment method of coal tar

A coal tar and pretreatment technology, applied in tar processing, petroleum industry, etc., can solve the problems of low utilization rate of coal tar, waste of heavy fractions, reduction of economic benefits, etc., and achieve high utilization rate, easy realization, and simple process Effect

Active Publication Date: 2007-08-08
HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
View PDF1 Cites 43 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The distillation pretreatment method only utilizes the light fraction of coal tar, while the heavy fraction of coal tar is wasted, that

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 2369g coal tar, its properties are shown in Table 1, mix homogeneously with 2087g refined diesel oil by volume ratio 1: 1.04, be heated to 50 ℃, add 200ml water then, 20ml sodium carbonate solution (mass concentration 5%) adjust pH value to be 9, add 2ml of polyether demulsifier, stirred for 2 hours and then left to stand for 6 hours, layered to obtain 4022g of refined diesel solubles, 257g of water and 353g of insolubles; 353g of insolubles and 372g of toluene were mixed uniformly at a volume ratio of 1:1.25, and the control of 60 ℃ temperature, separate 128g of toluene insoluble matter; distill the toluene in the toluene soluble matter to obtain 225g of distilled residue. The residue is uniformly mixed with refined diesel solubles to obtain pretreated coal tar. The utilization rate of coal tar is 91.18%. , the properties of coal tar after pretreatment are shown in Table 1.

[0019] Table 1. Properties of coal tar and coal tar after pretreatment

[0020] pr...

Embodiment 2

[0023] 1790g coal tar, its properties are shown in Table 2, mixed with 1826g coal tar hydrogenated oil by volume ratio 1: 1.2, heated to 150 ° C, then added 200ml water, 20ml sodium carbonate solution (mass concentration 5%) to adjust the pH value If it is 9, add 2ml polyether demulsifier, stir for 0.5h and then let it stand for 24h, and separate layers to obtain 3502g of oil soluble matter, 280g of water and 55g of insoluble matter; 55g of insoluble matter and 92g of toluene by volume ratio 1:2.0 Mix evenly and dissolve at 100°C to separate out 47g of toluene insoluble matter; distill off the toluene in the toluene soluble matter to obtain 8g of distillate, which is mixed evenly with refined diesel oil soluble matter to obtain pretreatment After coal tar. The utilization rate of coal tar is 94.08%. The properties of coal tar after pretreatment are shown in Table 2.

[0024] Table 2. Properties of coal tar and pretreated coal tar

[0025] project

[0026] ...

Embodiment 3

[0028] 2000g of coal tar, whose properties are shown in Table 3, is mixed with 338g of hydrotreated diesel oil in a volume ratio of 1:0.2, heated to 80°C, then added with 600ml of water and 5ml of sodium carbonate solution (mass concentration 5%), and the pH value is adjusted to 6. Add 1m polyether demulsifier, stir for 1 hour and then let stand for 12 hours to obtain 1665g hydrotreated diesel oil soluble matter, 636g water and 673g insoluble matter; the volume ratio of 673g insoluble matter and 226g toluene is 1:0.4 Mix evenly and dissolve at 55°C, and 475g of toluene insoluble matter can be separated out; distill out the toluene in the toluene soluble matter to obtain 198g of distilled matter, which can be mixed evenly with refined diesel oil soluble matter to obtain pretreatment After coal tar. The utilization rate of coal tar is 90.1%. The properties of coal tar after pretreatment are shown in Table 3.

[0029] Table 3. Properties of coal tar and coal tar after pretreatme...

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

No PUM Login to view more

Abstract

The invention discloses a predisposing method of coal tar, which comprises the following steps: blending coal tar and fraction oil and aromatic hydrocarbon; extracting; removing most of impurity from coal tar; fitting for deep manufacturing of liquefied oil and shale oil.

Description

1. Technical field: [0001] The invention relates to deep processing of coal tar, in particular to a pretreatment method for removing impurities from coal tar before hydrogenation of coal tar. 2. Background technology: [0002] Coal tar is a by-product of coking, coal chemical and coal gasification industries. At present, coal tar is generally sold as a low-quality fuel after simple blending, and the product quality is poor, causing serious environmental pollution when burned. With the continuous increase of coal tar production and increasingly stringent environmental regulations, the clean processing and effective utilization of coal tar has become more and more important. [0003] The production of high-quality fuel oil by hydrogenation upgrading is an important way for the comprehensive utilization of coal tar. This technology not only conforms to the national policy of developing new energy sources and protecting the environment, but also brings considerable economic be...

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
IPC IPC(8): C10C1/00
Inventor 李庆华刘呈立周冬京易娇
Owner HUNAN CHANGLING PETROCHEM SCI & TECH DEV CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap