Bisulphates, aqueous solution

Other Oxyanions of Sulphur. The effect of pressure on the dissociation of aqueous solutions of the bisulphate ion has been studied182 by measuring the Raman spectra of sulphate at 982 cm-1 and bisulphate at 1052 cm-1. An increase in the intensity of the sulphate peak was observed with increasing... 

Asahi Chemicals Industries in Japan in the early 1970s introduced a commercial process which also uses a lead cathode in a membrane cell The catholyte stream is, however an emulsion of acrylonitrile and 12% eihyltributylammonium bisulphate in water. As a result, the aqueous solution is saturated with acrylonitrile (about 7%) and the product - adiponitrile - extracts back into the excess acrylonitrile within the cell In this process the number of unit processes in the product isolation is much reduced the letraalkylammonium salt remains in the aqueous phase and the organic products can be separated by distillation. Moreover, the cell voltage is much reduced The catholyte is quite acidic, and the major by-product is propiontlrtle. 

Antimony Tetrasulphide, Sb S. —This was obtained by Berzelius by passing hydrogen sulphide gas into a solution of the tetroxide. Hose was able to obtain it from the decomposition of an aqueous solution of the fusion-product of the trisulphide and bisulphate of potassium by tartaric acid. It is a reddish-yellow powder. 

The 2-naphthalenesulfonic acid, l,2,3,4-tetrahydro-2-methyl-l,4-dioxo-, sodium salt, trihydrate can be prepared by mixing the 2-methyl-l,4-naphthoquinone with the bisulphite salt in the presence of water. Ordinarily gentle warming of the aqueous mixture is preferred to facilitate solution. The mixture of 2-methyl-l,4-naphthoquinone (250 mg 1 molar equivalent) sodium bisulphite (149 mg 1 molar equivalent) distilled water (250 ml) or 2-methyl-1,4-naphthoquinone (250 mg 1 molar equivalent) potassium bisulphate (349 mg 2 molar equivalent) distilled water 250 ml may be used. These examples representing preferred ratios of ingredients are merely illustrative and are not to be interpreted as limiting. 

The resulting reaction mixture is treated with an aqueous sodium bisulphate solution to get rid of the manganese dioxide formed in the medium due to the decomposition of KMnO. ... 

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