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Method for separating phenols in coal liquefaction oil

A technology for phenolic compounds and coal liquefied oil, which is applied in the preparation of organic compounds, chemical instruments and methods, dehydration/demulsification by chemical methods, etc. the effect

Active Publication Date: 2014-08-06
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, how to separate phenolic compounds from coal liquefied oil so that this high value-added product can be fully utilized and meet market demand has become a difficult problem for people currently facing difficulties.

Method used

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  • Method for separating phenols in coal liquefaction oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] 1) Take 50 g of coal liquefied oil provided by the coal liquefied oil plant and put it into a 500 ml beaker, add 250 g of organic solvent toluene and 6.25 g of sodium chloride into the beaker, stir and dehydrate to obtain dehydrated coal liquefied oil.

[0040] 2) Take the dehydrated coal liquefied oil, pour it into a glass tube filled with saturated sodium hydroxide solution, plug the stopper and shake in the big ball for 25 minutes for extraction. After standing for 10 minutes, the lye layer will be released. An extract of phenolic compounds.

[0041] 3) Use a hydrochloric acid solution with a concentration of 30% by weight to neutralize the lye layer, and use a dichloromethane solution to strip and separate the neutralized lye layer to obtain a dichloromethane stripping solution containing phenolic compounds. The dichloromethane stripping solution containing phenolic compounds is concentrated and distilled to obtain phenolic compounds.

[0042] 4) Use the same measuring cy...

Embodiment 2

[0044] 1) Take 50 g of coal liquefied oil provided by the coal liquefied oil plant and put it into a 500 ml beaker, add 300 g of organic solvent ethylbenzene and 3.33 g of sodium chloride into the beaker, stir and dehydrate, to obtain dehydrated coal liquefied oil.

[0045] 2) Take the dehydrated coal liquefied oil, pour it into a glass tube filled with saturated potassium hydroxide solution, plug the stopper, and shake in the big ball for 25 minutes for extraction. After standing for 10 minutes, the lye layer is released, which means An extract of phenolic compounds.

[0046] 3) Use a hydrochloric acid solution with a concentration of 5wt% to neutralize the lye layer, and use a dichloromethane solution to strip and separate the neutralized lye layer to obtain a dichloromethane stripping solution containing phenolic compounds. The dichloromethane stripping solution containing phenolic compounds is concentrated and distilled to obtain phenolic compounds.

[0047] 4) Measure the obtai...

Embodiment 3

[0049] 1) Take 50g of coal liquefied oil provided by the coal liquefied oil plant and put it into a 500ml beaker, add 125g of organic solvent ethylbenzene and 10g of sodium chloride to the beaker, stir and dehydrate to obtain dehydrated coal liquefied oil.

[0050] 2) Take the dehydrated coal liquefied oil, pour it into a glass tube filled with saturated potassium hydroxide solution, plug the stopper, and shake in the large ball for 30 minutes for extraction. After standing for 12 minutes, the lye layer is released, which is An extract of phenolic compounds.

[0051] 3) Use a sulfuric acid solution with a concentration of 10wt% to neutralize the lye layer, and use a dichloromethane solution to strip and separate the neutralized lye layer to obtain a dichloromethane stripping solution containing phenolic compounds. The dichloromethane stripping solution containing phenolic compounds is concentrated and distilled to obtain phenolic compounds.

[0052] 4) Measure the obtained phenolic ...

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Abstract

The invention discloses a method for separating phenols in coal liquefaction oil. The method comprises the following steps: S1, performing extraction and separation on the coal liquefaction oil to obtain an extraction liquid containing phenols; S2, performing back extraction and separation on the extraction liquid containing the phenols to obtain the phenols. According to the invention, the processes of extraction, back extraction and separation are performed on the coal liquefaction oil, the phenols are obtained from the coal liquefaction oil with a high yield, the separation method has a good separation effect, the solvent is easy to obtain, and the operation is convenient and simple.

Description

Technical field [0001] The invention relates to the technical field of coal liquefaction oil separation, in particular to a method for separating phenolic substances in coal liquefied oil. Background technique [0002] Coal is mainly a non-renewable precious fossil resource transformed from the remains of ancient plants over a long period of more than 70 million years in a complex geological environment. As an energy source, coal promoted the development of the first and second industrial revolutions and laid the foundation for economic growth in modern society. Especially in our country, the role of coal in the national economy is more obvious. Coal liquefaction technology is relatively mature in our country. It is mainly a process technology that directly reacts solid coal with hydrogen under high pressure and a certain temperature to directly convert coal into liquid oil. The primary crude oil obtained from coal liquefaction contains more oxygen-containing compounds, most of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G21/00C10G21/08C10G33/04C10G53/04C07C37/70C07C37/72C07C39/00
Inventor 蔺华林李克健章序文
Owner CHNA ENERGY INVESTMENT CORP LTD