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Stannous sulfate

An electrorefining plant may operate with either an acid or an alkaline bath. The acid bath contains stannous sulfate, cresolsulfonic or phenolsulfonic acids (to retard the oxidation of the stannous tin in the solution), and free sulfuric acid with P-naphthol and glue as addition agents to prevent tree-like deposits on the cathode which may short-circuit the cells. The concentration of these addition agents must be carefliUy controlled. The acid electrolyte operates at room temperature with a current density of ca 86—108 A/m, cell voltage of 0.3 V, and an efficiency of 85%. Anodes (95 wt % tin) have a life of 21 d, whereas the cathode sheets have a life of 7 d. Anode slimes may be a problem if the lead content of the anodes is high the anodes are removed at frequent intervals and scmbbed with revolving bmshes to remove the slime (7). [Pg.58]

Of the large volume of tin compounds reported in the Hterature, possibly only ca 100 are commercially important. The most commercially significant inorganic compounds include stannic chloride, stannic oxide, potassium staimate, sodium staimate, staimous chloride, stannous fluoride, stannous fluoroborate, stannous oxide, stannous pyrophosphate, stannous sulfate, stannous 2-ethyUiexanoate, and stannous oxalate. Also important are organotins of the dimethyl tin, dibutyltin, tributyltin, dioctyltin, triphenyl tin, and tricyclohexyltin families. [Pg.64]

Stannous Sulfate. Stannous sulfate (tin(Il) sulfate), mol wt 214.75, SnSO, is a white crystalline powder which decomposes above 360°C. Because of internal redox reactions and a residue of acid moisture, the commercial product tends to discolor and degrade at ca 60°C. It is soluble in concentrated sulfuric acid and in water (330 g/L at 25°C). The solubihty in sulfuric acid solutions decreases as the concentration of free sulfuric acid increases. Stannous sulfate can be prepared from the reaction of excess sulfuric acid (specific gravity 1.53) and granulated tin for several days at 100°C until the reaction has ceased. Stannous sulfate is extracted with water and the aqueous solution evaporates in vacuo. Methanol is used to remove excess acid. It is also prepared by reaction of stannous oxide and sulfuric acid and by the direct electrolysis of high grade tin metal in sulfuric acid solutions of moderate strength in cells with anion-exchange membranes (36). [Pg.66]

Stannous fluoride, 24 801, 804, 8 340 Stannous fluoroborate, 24 807 Stannous octanoate, 24 826 Stannous oxalate, 24 827 Stannous oxide, 24 804—805 Stannous oxide hydrate, 24 805 Stannous pyrophosphate, 24 807 Stannous sulfate, 24 806-807 Stannylquinones, 21 254 Stanton number (St), 15 687t Stanylenka 460 HRST, 19 764 Staphylococci, coagulase-negative, 21 216 Staphylococcus aureus... [Pg.881]

Compounds Stannic oxide tin tetrachloride stannic chloride stannous chloride stannous sulfate sodium stannate potassium stannate... [Pg.677]

No systemic effects have been reported from industrial exposure. Some inorganic tin compounds can cause skin or eye irritation because of acid or alkaline reaction produced with water. Tin tetrachloride, stannous chloride, and stannous sulfate are strong acids sodium and potassium stannate are strong... [Pg.677]

Formula SnS04 MW 214.77 Synonyms stannous sulfate tin sulfate... [Pg.941]

Sulfates, [CAS 7488-55-3], Stannous sulfate, a white powder soluble in water and H2SO4, is obtained commercially by action of H2SO4 on SnCU or Sn. Stannic sulfate may be formed by the solution of stannic hydroxide in dilute H2SO4, or by action of oxidizing agents on stannous salts. [Pg.1618]

Sn(>2 = stannic oxide Sn2<>7N2 = stannous nitrate Sn3(P04)2 = stannous orthophosphate SnS2 = stannous sulfide SnS04 = stannous sulfate (W) = water wk = week(s)... [Pg.35]

Tin is reactive enough to displace hydrogen from dilute acids, but it does not tarnish in moist air. It reacts with warm hydrochloric acid to produce stannous chloride, SnCb, and hydrogen, and with hot concentrated sulfuric acid to produce stannous sulfate, SnSO, and sulfur dioxide, the equations for these reactions being... [Pg.501]

Electrorefining can be carried out in acidic or alkaline medium. The acid electrolytes consist of sulfuric acid and stannous sulfate, with additives such as creosulfonic or phenolsulfonic acids and glue to modify deposit formation on the cathodes. The alkaline electrolytes consist of potassium or sodium stannite and free alkali. When compact cathode deposits are required, alkaline electrolytes are inferior to acid sulfate or halogen solutions in terms of electric energy consumption, productivity, cathode morphology, and operating temperature [82, 83]. [Pg.220]

CHEMICAL PROPERTIES Chemical properties vary depending upon the specific inorganic tin compound. Metallic tin normally has a protective film of stannic oxide which thickens as the temperature is raised powder will oxidize, especially in the presence of moisture stannous chloride absorbs oxygen from the air and is converted into insoluble oxychloride stannic chloride may be decomposed by hot water, evolving much heat stannic chloride will attack forms of plastic, rubber, and coatings water solution of stannous sulfate decomposes rapidly with precipitation of a basic sulfate (stannous chloride) FP (NA) LFL/UFL (NA) AT (NA) HF (-325.1 kJ/mol crystal at 25 C Hf (12.8 kJ/moI at 520 K). (stannic chloride) FP (NA) LFL/UFL (NA) AT (NA) HF (-511.3 kJ/mol liquid at 25 C) Hf (9.2 kJ/mol at 240K). (stannous sulfate) FP (NA) LFL/UFL (NA) AT (NA) HF (data not found) Hf (data not found), (tin) AT (dust cloud 630 C, 116.6 F dust layer 430°C, 806"F). [Pg.953]

Tin, metal, and inorganic compounds Dusts irritating to the eyes, nose, throat, and skin. Proionged inhaiation may cause chest x-ray abnormalities. Some compounds react with water to fomn acids (tin tetrachloride, stannous chloride, and stannous sulfate) or bases (sodium and potassium stannate). 2mg/m (as Sn) 100 mg/m (as Sn) Metallic tin is odorless with a dull, silvery color. [Pg.621]

Stannic ammonium chloride Stannic chloride, aqueous Stannic tetrachloride Stannous bromide Stannous chloride, aqueous Stannous fluoride Stannous sulfate... [Pg.558]

Sulfuric acid, monotallow alkyl esters, sodium salts. See Sodium tallow sulfate Sulfuric acid, monotetradecyl ester, sodium salt Sulfuric acid, myristyl ester, sodium salt. See Sodium myristyl sulfate Sulfuric acid, nickel salt. See Nickel sulfate Sulfuric acid, nickel (2+) salt, hexahydrate. See Nickel sulfate hexahydrate Sulfuric acid, thallium (1+) salt Sulfuric acid, thaiiium (1+) sait (1 2). See Thaiiium (i) suifate Sulfuric acid, tin (2+) salt (1 1). See Stannous sulfate... [Pg.4271]

Tin sodium oxide. See Sodium stannate Tin stearate. See Stannous stearate Tin sulfate Tin (II) sulfate Tin (2+) sulfate. See Stannous sulfate... [Pg.4430]

Sodium stearate Stannous stearate Stannous sulfate Stearyl alcohol Styrene/acrylates copolymer... [Pg.4973]

Oleth-8 Oleth-12 . OIeth-15 raw material, tin electroplating Stannous sulfate raw material, vinegar SD alcohol 29 SD alcohol 35-A raw material, vitamin E Linalool... [Pg.5593]

See other pages where Stannous sulfate is mentioned: [Pg.64]    [Pg.66]    [Pg.78]    [Pg.78]    [Pg.951]    [Pg.357]    [Pg.380]    [Pg.61]    [Pg.64]    [Pg.66]    [Pg.78]    [Pg.78]    [Pg.846]    [Pg.1080]    [Pg.1091]    [Pg.1174]    [Pg.1385]    [Pg.952]    [Pg.953]    [Pg.953]    [Pg.954]    [Pg.4180]    [Pg.5138]    [Pg.5147]    [Pg.5755]    [Pg.5828]   
See also in sourсe #XX -- [ Pg.677 ]

See also in sourсe #XX -- [ Pg.77 , Pg.941 ]



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