A process for treating waste liquid produced by ethyl chloride
A chlorine production and waste liquid technology, applied in the process field of waste liquid, can solve the problems such as high total treatment cost, incineration residue without use value, etc.
Active Publication Date: 2021-10-12
杭州深瑞环境有限公司
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Problems solved by technology
Although the distillation raffinate can be sent to incineration, the total treatment cost is high, and the incineration residue has no use value, so only by turning the raffinate into treasure can the total production cost be reduced
Method used
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Embodiment Construction
[0019] The following are specific examples of the present invention to further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
[0020] A factory produces ethyl chloride, and after evaporation and purification, it produces ethyl chloride waste liquid, which is a black oily substance, and its main components are ethyl chloride and a certain amount of polysulfide and dimer sulfide; another large waste liquid It is characterized by containing mercaptans and thioethers, which have a foul smell and need to be removed.
[0021] The waste water produced in the same batch of ethyl chloride produced by industry is subjected to the following treatment process, and the COD in the waste liquid before and after treatment is compared. The measured COD in the waste liquid before treatment is 45400mg / L.
[0022] First carry out hydrolysis, dilute the distillation waste liquid by 21 times with water, adjust the pH of the d...
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The invention discloses a process for treating waste liquid produced by ethyl chloride. The process includes the following steps: (1) hydrolyzing the ethyl chloride waste liquid with the addition of ammonia; (2) oxidizing the waste liquid produced by the hydrolysis under the air; (3) evaporating the oxidizing liquid Extract ammonium salts. The process for treating the waste liquid produced by ethyl chloride of the present invention adopts the technology with hydrolysis and oxidation technology as the core to degrade the organic matter in the waste liquid, and the mercaptan and sulfide with foul smell can be degraded into CO 2 , H 2 O, sulfate radical, the final system discharge water has no foul smell. This process uses ammonia as the agent to adjust the pH, so that the mixed ammonium salts of ammonium hydrogen phosphate, ammonium sulfate and ammonium chloride are produced after the waste liquid is degraded, and the ammonium salts can be used for fertilizer production.
Description
technical field [0001] The invention relates to the technical field of environmental protection engineering, in particular to a process for treating waste liquid produced by ethyl chloride. Background technique [0002] Ethyl chloride, chemical name O, O-diethylthiophosphoryl chloride, diethylthiophosphoryl chloride, molecular formula C 4 h 10 o 2 PSCl. Colorless transparent liquid, insoluble in water, easily soluble in fat and aromatic organic solvents, such as benzene, ether, etc. It is a special intermediate for the synthesis of organophosphorus pesticides such as phoxim and ethyl parathion. Using phosphorus pentasulfide as raw material, react with absolute ethanol to obtain ethyl sulfide, and then react with chlorine gas to obtain crude chloride. [0003] Chlorine raffinate is the remaining raffinate after distillation of crude ethyl chloride. There are 10%~25% ethyl chloride and a certain amount of polysulfide and disulfide in the raffinate. Although the distillat...
Claims
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IPC IPC(8): C02F9/10C05G1/00C02F101/36C02F101/30C02F101/10
CPCC02F1/048C02F1/66C02F1/725C02F1/74C02F9/00C02F2101/101C02F2101/36C02F2101/40C02F2301/08C05B7/00C05C3/00
Inventor 沈静华伍立波
Owner 杭州深瑞环境有限公司