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Purification technique for methyl stannum mercaptide industrial sewage

A technology of tin methyl mercaptide and industrial wastewater, which is applied in anaerobic digestion treatment, natural water treatment, chemical instruments and methods, etc., can solve problems such as immature industrial wastewater purification and treatment methods, achieve easy management and save operating costs , the effect of low energy consumption

Inactive Publication Date: 2008-08-27
ENG DESIGN & RES INST OF GENERAL ARMAMENTS DEPT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of this, in order to overcome the immature problem of industrial wastewater purification and treatment methods in the current production of tin methyl mercaptide, the present invention provides a sewage treatment system that combines the purification of tin methyl mercaptide industrial wastewater with the treatment of domestic purified sewage. process, in order to save investment, reduce operating costs, and facilitate management

Method used

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  • Purification technique for methyl stannum mercaptide industrial sewage

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Embodiment 1

[0024] A methyl mercaptide tin industrial wastewater, condensation wastewater water volume 10m 3 / d, water quality COD is 20000mg / L, NH 4 + -N is 40000mg / L, organotin content is 3000mg / L, Cl - The content of mercaptan is 8000mg / L, the content of mercaptan is 2000mg / L, the oil is separated by inclined plate, 5000mg / L ferric chloride is added, stirred and coagulated, filtered, and 80kg / m 3 Activated carbon adsorbent (specific surface is 600m 2 / g, the density is 470kg / m 3 ), after full adsorption, ammonia is separated by rectification, and the water volume is 70m 3 / d, water quality COD is 1000mg / L, NH 4 + -N is 30mg / L, Cl - The crude wastewater with a content of 300mg / L was mixed, and after 15 days of anaerobic biochemical treatment, the COD of the effluent was 430mg / L, and the NH 4 + -N is 50mg / L, total tin is 0.8mg / L, meets the third-level discharge requirements of the "Integrated Wastewater Discharge Standard", and is treated together with domestic sewage.

Embodiment 2

[0026] A methyl mercaptide tin industrial wastewater, condensation wastewater water volume 15m 3 / d, water quality COD is 200000mg / L, NH 4 + - Condensation waste water with N of 20000mg / L removes surface slick oil through an oil-water separator, adds 2000mg / L polyferric sulfate, stirs, coagulates, filters, and adds 100kg / m 3 Activated carbon adsorbent (specific surface is 1000m2 / g, the density is 490kg / m 3 ), after full adsorption, ammonia is separated by rectification, and the water volume is 80m 3 / d, water quality COD is 2000mg / L, NH 4 + -N is 20mg / L, Cl - The crude wastewater with a content of 350mg / L was mixed, and after 10 days of anaerobic biochemical treatment, the effluent COD was 475mg / L, NH 4 + -N is 41mg / L, total tin is 0.7mg / L, meets the third-level discharge requirements of the "Integrated Wastewater Discharge Standard", and is treated together with domestic sewage.

Embodiment 3

[0028] The treated condensation wastewater and crude product wastewater are the same as in Example 1.

[0029] Condensation waste water is removed by oil-water separator to remove surface slick oil, add 500mg / L polyferric chloride and stir for 2 hours, add polyacrylamide 20mg / L, continue stirring for 10 minutes, let stand for 3 hours, filter, add 167kg / m 3 Sawdust adsorbent, fully adsorbed, and then separated ammonia by rectification, mixed with crude waste water, after 6 days of anaerobic biochemical treatment, the effluent COD is 400mg / L, NH 4 + -N is 46mg / L, and total tin is 0.7mg / L, which meets the third-level discharge requirements of the "Integrated Wastewater Discharge Standard" and is treated together with domestic sewage.

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Abstract

The invention discloses a purification process of industrial wastewater of methyltin mercaptide, in which the condensation wastewater in the production of methyltin mercaptide is mixed with raw wastewater after sequentially via oil separating, coagulating, adsorbing and rectifying, further via anaerobic biological treatment, when COD in the water is lower than 500mg / L, mixture of the condensation wastewater and the raw wastewater is sent into domestic sewage via pipelines and purified with the domestic sewage. The invention purifies the industrial wastewater of methyltin mercaptide with the domestic sewage through classifying and preprocessing the industrial wastewater of methyltin mercaptide to the certain extent, then combining for biochemical treatment and meeting discharge requirement of class III, thereby not only saving investment and reducing operation costs, but also facilitating management.

Description

technical field [0001] The invention relates to the field of water purification, in particular to a process for purifying industrial waste water in the production of tin methyl mercaptide. Background technique [0002] Organotin has become the most important stabilizer in PVC products due to its excellent light and heat stability and mutual solubility. Among them, tin methyl mercaptide is the most widely used in PVC products because of its stability, transparency and The mutual solubility and weather resistance are superior to other organotins, so it has the reputation of "the king of stabilizers". [0003] The synthesis of tin methyl mercaptide mainly has two steps. The first step is to synthesize methyl tin chloride from methyl chloride and tin powder, and the reaction product is a mixture of dimethyl tin dichloride and methyl tin trichloride. The mixture is reacted with isooctyl mercaptoacetate by an appropriate acid-binding agent under appropriate solvent, temperature a...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/40C02F1/52C02F1/28C02F1/04C02F3/28C02F103/36
Inventor 张统董春宏褚方舟王守中
Owner ENG DESIGN & RES INST OF GENERAL ARMAMENTS DEPT
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