Of manganous sulfate

Yoda,104 after reacting non-reducing sugars and polyhydric alcohols with periodate, used a mixture of manganous sulfate and bis-(p-dimethyl-aminophenyl)methane in acetic acid to detect the spots sensitivity, 5 to 50 micrograms. 

Manganic sulfate can be generated anodically by electrolysis of manganous sulfate in 55% sulfuric acid at a lead anode 157 After electrolysis, xylene is added and allowed to react at 25-35°, tolualdehyde being formed in 30-45 % current yield. The used electrolyte is then purified and used again. 

Preparation. Morton and co-workers in 1948 prepared an activated form of the oxide by mixing aqueous solutions of equivalent amounts of manganous sulfate and potassium permanganate and washing and drying the precipitate, and found it an effective reagent for oxidation of vitamin A, to retinene, whereas ordinary... 

Shake about a gram with a solution of manganous sulfate acidified with dilute sulfuric acid. 

The suspension of manganous hydroxide is prepared by dissolution of manganous sulfate MnS04 in sodium hydroxide.) After acidification and in the presence of iodide ions, Mn02 is reduced by the latter with the liberation of iodine ... 

Ma.nga.nese. Commonly used manganese fertilizer materials are manganous and manganic sulfates, chlorides, carbonates, oxides, frits, and chelates. Soil appHcation rates range from about 2 to 150 kg/hm of Mn. 

The removal of inorganic salts from reaction mixtures afforded by polymeric materials may be simply and effectively accomplished by dialysis,166 178 after decomposition of remaining periodate with ethylene glycol130 131 or butylene glycol. 161 170 Alternatively, the iodate and periodate ions may be removed as such, or after reduction to free iodine. The iodate and periodate ions have been effectively precipitated by means of sodium carbonate plus manganous sulfate,6 or by lead dithionate,191 barium chloride,24 192 193 strontium hydroxide194 202 or barium hydroxide,203 204 lead... 

DAP-Mn Also called the Manganese Dioxide Process. A flue-gas desulfurization process using a fluidized bed of manganese dioxide, which becomes converted to manganous sulfate. The adsorbent is regenerated with ammonia. 

Oxidation of toluenes and its derivatives to corresponding benzaldehydes with electrogenerated manganic sulfate in H2S04, cf. Sect. 3.1.1. 

Vaudano [140,140b] et al and Comninellis et al. [141-144] have described the electrooxidation of manganous to manganic sulfate on a pilot plant scale. 

In fine chemical manufacturing, the application of promoted platinum catalysts is less known. Maxted and Akhar have reported that the addition of stannous, manganous, ceric and ferric chloride to platinum oxide (Adams catalyst) facilitates the hydrogenation of aldehydes, ketones and olefins (ref. 1). The selective hydrogenation of unsaturated aldehydes or ketones to unsaturated alcohols has been achieved by the addition of ferrous sulfate and zinc acetate to platinum catalysts (ref. 2). 

Mn02 (c, ppt.). Thomsen15 measured the heat of reaction of aqueous manganous sulfate with aqueous potassium permanganate, and the heat of reaction of Mn02 (c, ppt.) with aqueous ferrous sulfate plus aqueous sulfuric acid. His data yield, for Mn02 (c,ppt.), Qf= 115.2 and 115.9, respectively. 

Tetryl or Picrylnitromethylamine(pp 488-89) can be detected by treating(in a micro test tube) a drop of benzenic soln of the sample with powdered manganous sulfate filling the tube to 2/3 of its capacity. After evapg benzene, the tube is immersed (after covering its mouth with a disk of filter paper moistened with Nessler soln) into a bath preheated to 140° and the temp is raised to 150°. A gray or black Stain on the paper appearing within 5 mins indicates the presence of a nitramine, such as tetryl. 

Equimolar solutions of barium chlorate and manganous sulfate were mixed, the supernatant liquid was filtered free from barium sulfate, and then evaporated at 50°C. After digestion in concentrated nitric acid and thorough removal of acid by washing, the residue was found to be completely active at — 20°C. 

Preparations of the required activity were also obtained when a hot solution containing cupric and manganous sulfates in the molar ratio of 3 2 was treated with potassium permanganate. 

Higgins et al.35 used manganous sulfate for precipitation of nucleic acids in continuous production of /3-galactosidase from Escherichia coli. The precipitation was fast (most of the nucleic acid was precipitated in 10 min of contact time). At 0.05 M manganous sulfate, only a small amount of nucleic acid precipitated. Precipitation was improved at 0.1 and 0.5 M concentrations of the precipitant, but as much as 70% enzyme activity was also lost under these conditions. 

MnS04, H20 at a concentration of 100 mmol/L homogenate. In the experiments, the actual amounts were varied around these values. Streptomycin sulfate and manganous sulfate were added to cell homogenate as a powder protamine sulfate was added as aqueous solution. After addition of the requisite amount of a precipitant to cell homogenate, pH of solution was adjusted to 7.0-7.1, and the solution was stirred for 10 min. The precipitate was removed by centrifugation in a cold room and the supernate was analyzed for TDH activity and for the relative contents of proteins and nucleic acids. The results are presented in Figs. 2-4. 

FIGURE 3 Precipitation of nucleic acids with manganous sulfate (A) effect on nucleic acid precipitation and residual TDH activity in the supernate and (B) effect on ratio of TDH lost to nucleic acid precipitated. 

Manganic sulfate, Mn2(S04)3, is obtained by the oxidation of manganese sulfate (tetrahydrate) in 6 M sulfuric acid by aqueous potassium permanganate at 0-25 °C. This oxidant oxidizes aromatic hydrocarbons to quinones [802]. 

The wastes (Fig. 6) are added to a mineral acid for initial purification (1), and then filtered and washed (2). They may be dried to obtain manganese dioxide (3) or dissolved with mineral acid with addition of a reducing agent (4), and fileterd (5) to liquid manganous sulfate (6). Liquid manganous salt may be concentrated and crystallized (7), and filtered (8) to solid manganous sulfate (9). 

To determine the original levels of oxygen present, excess aqueous potassium iodide is added, releasing iodine equivalent to the manganic sulfate present in the most rapid reaction of this sequence (Eq. 4.20). 

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