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Method for regeneration treatment on hydrocarbon cleaning agent cleaning waste liquid by potassium hydroxide

A technology of hydrocarbon cleaning agent and potassium hydroxide, which is applied in the field of chemical engineering, can solve problems such as regeneration and purification of cleaning waste liquid without hydrocarbon cleaning agent, soil, rivers, lakes, seas or air pollution, soil, air pollution, etc., reaching the price Low cost, considerable economic benefits, good cleaning performance

Inactive Publication Date: 2014-06-11
DALIAN DONGTAI INDAL WASTE TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the main treatment methods for cleaning waste liquid with hydrocarbon cleaning agents are: ①Pour it directly or pour it into the sewer pipeline into rivers, lakes and seas. Because it contains a large amount of industrial waste oil and dust, it is easy to cause groundwater, soil, rivers, lakes and seas or Air pollution; ② burn it as an auxiliary fuel, this treatment method has low economic value, and produces incineration slag, which is easy to pollute the soil, air, etc.
[0003] So far, there is no report on the regeneration and purification of hydrocarbon cleaning agent cleaning waste liquid

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 (laboratory scale)

[0018] Take 2 liters of hydrocarbon cleaning agent cleaning waste liquid (waste liquid obtained from stamping oil and anti-rust oil produced during cleaning parts) into a beaker, and then slowly pour 400 ml of 25% Aqueous potassium hydroxide solution was stirred thoroughly for 22 minutes. During the stirring process, it was found that the hydrocarbon cleaning agent cleaning waste liquid gradually became a colorless transparent liquid from the original light yellow turbid liquid with the pouring and stirring of potassium hydroxide, floating on the upper layer of the beaker; the color of potassium hydroxide absorbed oil became darker , was brown, and sank to the bottom of the beaker. After standing and stratifying for 2.5 hours, the supernatant was poured into a laboratory distiller, and heated and distilled at a temperature of 180 degrees to obtain 1.5 liters of distillate products.

[0019] Use this product and the hydrocarbon cleanin...

Embodiment 2

[0020] Embodiment 2 (industrial production scale)

[0021] (1) Remove most of the waste oil and other impurities dissolved in the cleaning waste liquid by alkalization and liquid separation: add oily waste hydrocarbon cleaning agent (cleaning parts After the stamping oil and anti-rust oil produced in the processing process, slowly add 30% potassium hydroxide aqueous solution under slow stirring, and the amount of alkali added is 20% of the mass of the waste liquid. After adding alkali, fully stir for 30 minutes to fully mix potassium hydroxide and oil-containing waste hydrocarbon cleaning agent, and then stand for 2 hours for stratification. Most of the oil, water and other impurities in the waste hydrocarbon cleaning agent have been separated from the waste liquid and dissolved in the potassium hydroxide solution. The potassium hydroxide solution containing oil has a high density and is located in the lower layer, and the deoiled cleaning agent has a low density and is locate...

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Abstract

The invention provides a method for regeneration treatment on a hydrocarbon cleaning agent cleaning waste liquid by potassium hydroxide. The method is used for purification of the hydrocarbon cleaning agent in the hydrocarbon cleaning agent cleaning waste liquid. The method comprises the following steps of 1, adding the hydrocarbon cleaning agent cleaning waste liquid into a container, slowly adding potassium hydroxide solids or an aqueous solution of potassium hydroxide into the container, carrying out stirring for 20-30min to obtain a uniform mixture, and standing the mixture for 2-3h so that the mixture is layered because of different densities, 2, extracting a supernatant as a base material, feeding the supernatant into an organic distillation device, carrying out recovery and purification of the hydrocarbon cleaning agent by negative pressure distillation, and carrying out burning on residues in a distillation still, and 3, separating lower-layer waste alkali containing grease, dust and moisture and feeding the waste alkali into a waste water treatment section. The method realizes regeneration and recovery of the cleaning agent, has good economic benefits, reduces environmental pollution and accords with environmental protection ideas. A test and industrial use prove that the regenerated and recovered hydrocarbon cleaning agent has ideal use effects and can completely replace a hydrocarbon cleaning agent product.

Description

technical field [0001] The invention belongs to the technical field of chemical engineering, and in particular relates to a regeneration treatment method for cleaning waste liquid with a hydrocarbon cleaning agent. Background technique [0002] At present, the treatment methods of hydrocarbon cleaning agent cleaning waste liquid are mainly as follows: ① Dump it directly or pour it into the sewer pipeline into rivers, lakes and seas. Because it contains a large amount of industrial waste oil and dust, it is easy to cause groundwater, soil, rivers, lakes and seas or Air pollution; ② burn it as an auxiliary fuel, the economic value of this treatment method is low, and it will produce incineration slag, which is easy to pollute the soil and air. [0003] So far, there is no relevant report on the regeneration and purification of hydrocarbon cleaning agent cleaning waste liquid. Contents of the invention [0004] The object of the present invention is to provide a method for r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C11D11/00C10G53/12
Inventor 华庆亮
Owner DALIAN DONGTAI INDAL WASTE TREATMENT