Cuprous thiocyanate and production method

Background 

Cuprous thiocyanate (CuSCN, Cuprous Thiocyanate), marine organisms poisoning agent of new generation for people's exploitation, than Red copper oxide have toxicity distribute more stable, better effects if, materialization property is more stable, good stability, exposing air to the open air can be not oxidized yet, and effective storage time is long, can reach more than 2 years, because half cupric ion only, heavy metal content is low, and the feature of environmental protection is good, but poisoning property does not reduce, sulfur hydrogen anion also has toxic action,, can be used for aluminium body oceanographic equipment, and price is not low yet with aluminium generation chemical reaction.

The inventive method owing to suitably improved rhodanide reaction concentration, has been omitted sodium hydroxide and S-WAT, the generation of reactionless substantially by-product salt has not only improved the reaction recovery rate, and yield Gao Keda is more than 99%, more former method improves yield about 5%, and purity reaches more than 99%; And, having significantly reduced the waste water generation because of not needing to wash desalination, product per ton only produces waste water 1-3 ton; And owing to disturb the salt amount few in the reaction, also help crystalline particle and evenly grow, gained cuprous thiocyanate uniform particles is good, and particle size range can be contracted to 5-25 μ m of the present invention by 5-50 μ m of former method, and particle diameter is even, the preservative effect good stability; Again owing in the replacement(metathesis)reaction, adopt SO 2Or the CO reducing gas, make reaction mass and air insulated, it is oxidized effectively to have protected cuprous ion to be difficult for; can obtain white or off-white powder product, whiteness can reach 70-80%, can adapt to different antifouling paint color matching requirements; improve the versatility of color matching greatly, enlarged Application Areas.Thereby overcome the deficiencies in the prior art, comprehensive cost reduces about about 20%.

Production method

With concentration is that 38% sodium thiocyanate water solution and concentration are 35% copper sulfate solution, at SO 2Under the reducing gas protection, the three is with the 1:1:0.5 mol ratio, and replacement(metathesis)reaction is 1.5 hours under 60 ℃ of temperature, and reactant filters and obtains particle size range is 15-25 μ m, the white cuprous thiocyanate powder of whiteness 75%