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Method for solvent extraction-column chromatography separation of coal tar, and apparatus thereof

A separation method and coal tar technology, which is applied in the field of coal tar separation, neutral oil and soft pitch, and separation of coal tar to obtain crude phenol, which can solve the problems of low separation efficiency of product components, large amount of phenol-containing wastewater, and many operating procedures and other problems, to achieve the effect of easy expansion of production, less investment, and less investment

Inactive Publication Date: 2013-09-11
NORTHWEST UNIV(CN)
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] The purpose of the present invention is to provide an organic solvent that can realize self-circulation and an environmentally friendly coal tar separation method to overcome the large energy consumption in the existing coal tar processing process, many and complicated operating procedures, low separation efficiency of each component of the product, Large amount of phenolic wastewater and serious environmental pollution;

Method used

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  • Method for solvent extraction-column chromatography separation of coal tar, and apparatus thereof
  • Method for solvent extraction-column chromatography separation of coal tar, and apparatus thereof
  • Method for solvent extraction-column chromatography separation of coal tar, and apparatus thereof

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Embodiment Construction

[0033] The present invention will be described in further detail below by way of examples.

[0034] 1. Solvent extraction-column chromatography separation coal tar device

[0035] Such as figure 1 As shown, a solvent extraction-column chromatography separation coal tar device includes a condenser (1), a solvent return pipe (5), an extractor (6), a chromatographic column (13), a steam riser (14), The concentration kettle (21) and the heating device (17), wherein the lower part of the extractor (6) is connected to one end of the solvent return pipe (5), and the other end of the solvent return pipe (5) is connected to the upper end of the chromatography column (13), and the solvent returns The middle part of the tube (5) is provided with a spherical valve A (8), the lower end of the chromatographic column (13) is connected to the top of the concentration kettle (21), and the top side of the concentration kettle (21) is connected to the steam rising pipe (14), and the steam risin...

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Abstract

The invention discloses a method for solvent extraction-column chromatography separation of coal tar, and an apparatus thereof. The method comprises the following steps: respectively placing C5-C7 alkane as a solvent and coal tar in a solvent extraction system, heating, stirring, allowing the obtained solution to stand for completing extraction, allowing the obtained extract liquid to enter a chromatography column system filled with a silica gel filler, carrying out cycle elution on the chromatography column system with an extraction solvent as an eluant, carrying out cycle extraction and column chromatography elution several times to obtain a raffinate (soft asphalt) in the extraction system and neutral oil in a concentration kettle, changing the eluant to ethyl acetate or toluene, and carrying out cycle elution several times to obtain crude phenols in the concentration kettle. The method for separating coal tar is environmentally-friendly, and does not generate wastewater, waste residues or waste gases; and the whole apparatus is in a relatively closed pipeline, so the contact of easy-oxidation and easy-decomposition substances with air is reduced.

Description

technical field [0001] The invention relates to a method and device for separating coal tar, in particular to a method and device for separating coal tar to obtain crude phenol, neutral oil and soft asphalt, belonging to the technical field of coal chemical industry. Background technique [0002] Coal tar is rich in phenols, aliphatic hydrocarbons and aromatic hydrocarbons. Phenolic compounds are important chemical raw materials, widely used in synthetic fibers, engineering plastics, pesticides, medicines, preservatives, plasticizers, spices and dye intermediates, and belong to high value-added fine chemical products; aliphatic hydrocarbons Compounds are an important part of gasoline, diesel and other fuel oils, and are excellent raw materials for hydrogenation to produce high-cetane diesel oil; aromatic hydrocarbons have high added value such as carbazole and quinoline that cannot be obtained or cannot be obtained economically in petrochemical industry fine chemicals. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C1/18C10C1/00
Inventor 孙鸣马晓迅徐龙
Owner NORTHWEST UNIV(CN)
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