Oil dephenolizing extractant in brown coal tar, and preparation method and application thereof

A technology for removing phenolic extractants and lignite tar, which is applied in chemical instruments and methods, extraction water/sewage treatment, liquid solution solvent extraction, etc., can solve the problem of low economic value, achieve economic value improvement, wide source of raw materials, and process simple effect

Inactive Publication Date: 2012-02-15
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most lignite tar medium oil in China can only be sold as low-quality fuel oil, with low economic value

Method used

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  • Oil dephenolizing extractant in brown coal tar, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0041] 1, the preparation method of lignite tar oil dephenol extraction agent

[0042] (1) The NaOH solution with a mass percentage of 20% is used as the lignite tar medium oil alkali washing solution. After mixing 16L of NaOH solution and 20L of lignite tar medium oil at a volume ratio of 0.8 to 1, place it in a constant temperature air shaker for oscillating alkali washing. The speed of constant temperature air shaker is 160r / min, the temperature is 50°C, the shaking time is 5min, let it stand for stratification, take out the upper layer and wash it with medium oil;

[0043] (2) Use 92% sulfuric acid as the pickling solution for medium oil of lignite tar, mix 4L of sulfuric acid with 20L of medium oil after alkali washing according to the volume ratio of 1 to 5, then place it in a constant temperature air shaker for oscillating pickling, the constant temperature air shaker speed 160r / min, temperature 50°C, shaking time 5min, standing for stratification, the upper layer is re...

Embodiment 2

[0049] 1. Preparation of oil-removing phenolic extractant in lignite tar

[0050] (1) Use NaOH solution with a mass percentage of 25% as lignite tar medium oil alkali washing solution, mix 16L of NaOH solution and lignite tar medium oil 16L according to the volume ratio of 1 to 1, and then place it in a constant temperature air shaker for oscillating alkali washing. The speed of constant temperature air shaker is 160r / min, the temperature is 50°C, the shaking time is 5min, let it stand for stratification, take out the upper layer and wash it with medium oil;

[0051] (2) Use 92% sulfuric acid as the pickling solution for medium oil of lignite tar, mix 4L of sulfuric acid with 20L of medium oil after alkali washing according to the volume ratio of 1 to 5, then place it in a constant temperature air shaker for oscillating pickling, the constant temperature air shaker speed 160r / min, temperature 50°C, shaking time 5min, standing for stratification, the upper layer is refined medi...

Embodiment 3

[0058] 1. Preparation of oil-removing phenolic extractant in lignite tar

[0059] (1) The NaOH solution with a mass percentage of 20% is used as the lignite tar medium oil alkali washing solution. After mixing 16L of NaOH solution and 17.7L of lignite tar medium oil at a volume ratio of 0.9 to 1, place it in a constant temperature air shaker for oscillating alkali washing , the speed of the constant temperature air shaker is 160r / min, the temperature is 50°C, the shaking time is 5min, let it stand for stratification, take out the upper layer and wash it with medium oil;

[0060] (2) Use 92% sulfuric acid as the pickling solution for medium oil of lignite tar, mix 4L of sulfuric acid with 20L of medium oil after alkali washing according to the volume ratio of 1 to 5, then place it in a constant temperature air shaker for oscillating pickling, the constant temperature air shaker speed 160r / min, temperature 50°C, shaking time 5min, standing for stratification, the upper layer is ...

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Abstract

The invention discloses a preparation method of an oil dephenolizing extractant in brown coal tar, which not only can realize recycling comprehensive utilization of oil in the brown coal tar, but also can recover phenolic materials to provide basic production raw materials for organic chemical industry production. The method comprises the following steps of: carrying out alkali wash refining and acid wash refining on oil in the brown coal tar by using an NaOH solution and sulfuric acid to generate refined medium oil, and then carrying out chemical decomposition on acid sludge subjected to acid washing by using an ammonia water solution to separate out crude pyridine liquor; distilling the crude pyridine liquor to obtain pyridine base; and at last, adding pyridine base fraction into the refined medium oil according to proportion to obtain the oil dephenolizing extractant in brown coal tar. The oil dephenolizing extractant is used for processing high concentration waste water containing phenol, wherein the dephenolizing efficiency reaches 95% and the dephenolized extractant is carried out with reextraction for regenerating by using the NaOH solution with the regeneration efficiency of higher than 99%, and cycle use of the extractant can be realized. The dephenolizing extractant disclosed by the invention has low preparation cost, simple operation process, no waste liquor discharge in the preparation process of the extractant, and little extractant loss in waste water processing procedure, and is capable of realizing industrial continuous operation.

Description

technical field [0001] The invention relates to a lignite tar medium oil dephenol extraction agent and a preparation method and application thereof. [0002] Background technique [0003] The sources of industrial phenol-containing wastewater are very extensive. Gas plants, coking plants, ironworks, oil refineries, pharmaceutical factories and synthetic fiber factories all produce phenol-containing wastewater. If phenol-containing wastewater is discharged into water bodies, it will cause serious environmental pollution problems. Phenolic pollutants in water have extremely high biotoxicity and biorefractory biodegradability to aquatic organisms. They are strong nerve poisons and locally corrosive, and have toxic effects on all living organisms. They are listed by the US Environmental Protection Agency (EPA). One of the 129 priority control pollutants. At the same time, because phenolic compounds, as important organic chemical raw materials, have high economic value, the pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/26B01D11/04C02F101/34
Inventor 王向宇宁平陈芳媛赵天亮
Owner KUNMING UNIV OF SCI & TECH
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