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Acid residue treatment method

An acid residue treatment and acid residue technology, applied in the petrochemical field, can solve the problems of high viscosity of sulfuric acid residue, difficult to handle, unable to effectively reduce acid value, etc., and achieve the effect of reducing acid value, realizing economic value and avoiding environmental pollution.

Pending Publication Date: 2021-04-27
湖北大江润业再生资源有限公司
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Problems solved by technology

[0004] Sulfuric acid slag has a high viscosity, and with the prolongation of storage time, molecular superimposition and condensation will intensify, resulting in solidification, which is more difficult to handle
[0005] At present, the conventional solution in this industry is to soak and rinse with hot alkaline water, but this method cannot effectively reduce the acid value and completely separate the organic matter from the inorganic matter.

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Embodiment Construction

[0017] The present invention proposes a brand-new treatment method for acid slag, which detects the acid value of acid slag and calculates the amount of alkali (caustic soda, ammonia water, etc.) The acid slag is dissolved in the specially treated tank, and 1.2 equivalents of the calculated alkali amount is dissolved in water twice the mass of the acid slag, and the neutralization is carried out twice. Stop stirring for 1 hour after stirring fully, remove the water phase at the bottom, and finally wash twice with water to obtain an oil phase with an acid value of less than 10, which can be used as a raw material for blending fuel oil with other extracted oils. The neutralized water phase is filtered by air flotation and membrane treatment to remove trace organic residues, and then MVR is evaporated and dehydrated to produce industrial salt.

[0018] Because the acid value of the acid slag is extremely large (usually between 400-800, depending on the storage time) and a large a...

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Abstract

The invention provides a green and environment-friendly solution for hazardous waste pollutant sulfuric acid residues generated by a sulfuric acid refining process in a traditional waste oil regeneration process. The purpose of innocent treatment is achieved by dissolving sulfuric acid residues, washing the sulfuric acid residues with alkali and water, recovering organic oil materials in the acid residues and converting sulfuric acid residues into industrial salt.

Description

technical field [0001] The invention belongs to the technical field of petrochemical industry, and relates to a harmless treatment method for acid slag left behind after pickling treatment of waste oil with great environmental hazards. Background technique [0002] Sulfuric acid refining is a very effective means of regeneration of waste oil. In order to greatly improve the quality of regenerated oil, it is often necessary to adopt sulfuric acid refining as a main refining means in the regeneration process. Before the 1960s, the sulfuric acid-clay process used to be the main process for waste oil regeneration. [0003] At present, the domestic waste oil regeneration industry has stopped the process of sulfuric acid pickling oil. The main reason is that a large amount of useless, highly corrosive, and environmentally harmful sulfuric acid slag is produced after the waste oil is treated with sulfuric acid. [0004] Sulfuric acid slag has a high viscosity, and with the prolong...

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Application Information

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IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1003Y02W30/74
Inventor 王洪雷郭钢福
Owner 湖北大江润业再生资源有限公司
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