Sulfoxylate, sodium formaldehyde

In addition to appHcations in dyeing, sodium formaldehyde sulfoxylate is used as a component of the redox system in emulsion polymerization of styrene—butadiene mbber recipes. 

Sodium formaldehyde sulfoxylate dihydrate (sodium hydroxymethylsulHnate, Rongalite)... 

In the presence of sodium bicarbonate, sodium formaldehyde sulfoxylate (Rongalite) converts perfluoroalkyl iodides and bromides to the corresponding carboxylates Less decarboxylation to the monohydroperfluoroalkanes occurs when the bromides are used [16] (equation 17)... 

About 20 grams of diamino diphenyl sulfone is dissolved in about 500 cc of ethyl alcohol (3A made up of 5 parts methyl alcohol and 100 parts of ethyl alcohol) by placing the ingredients in a flask provided with a reflux condenser and warming over a water bath. About 24 grams of pure grade, very finely powdered (40 to 60 mesh) sodium formaldehyde sulfoxylate Is then rapidly added to the alcohol solution of diamino diphenyl sulfone and the mixture refluxed in the usual manner. It was found that the mixture should be refluxed for a total of 5 hours and that a precipitate starts to form near the 3 hour period. The reaction mixture is then cooled to 15°C and kept at this temperature for about 1 hour. The precipitate formed in the filtrate is filtered off rapidly and drained as much as possible to remove mother liquor and then washed with small amounts of cold alcohol. The solid product is immediately placed in a desiccator and dried over sulfuric acid for about 20 hours. 

Sodium formaldehyde sulfoxylates, 23 677 Sodium glucoheptonate, 4 708 Sodium D-gluconate, 4 708... 

Emulsion Polymerizations, eg. vinyl acetate [VAc]/ABDA, VAc/ethylene [VAE]/ABDA, butyl acrylate [BA]/ABDA, were done under nitrogen using mixed anionic/nonlonic or nonionic surfactant systems with a redox Initiator, eg. t-butyl hydroperoxide plus sodium formaldehyde sulfoxylate. Base monomer addition was batch or batch plus delay comonomer additions were delay. 

In the first step a rubbery polymer latex is prepared by emulsion polymerization of styrene and butadiene, the styrene being in an amount of 25%. Divinylbenzene is added as crosslinking agent in an amount of 1%. Diphenyl oxide sulfonate is used as emulsifier in aqueous solution and sodium formaldehyde sulfoxylate acts as a buffer in order to reach a pH of 4. As radical initiator, cumene hydroperoxide is used and the polymerization is conducted 70°C for 9 h. The end of the reaction period is detected as no further pressure drop is observed due to the consumption of butadiene. 

To the latex prepared, 7% of styrene are added followed by sodium formaldehyde sulfoxylate dissolved in water and cumene hydroperoxide. An exothermal reaction is observed. 

One hour after the completion of the exotherm, 7% of methyl methacrylate, 0.07% of butylene dimethacrylate, 0.07% parts sodium formaldehyde sulfoxylate dissolved in water and 0.15% of cumene hydroperoxide are added and the reaction is allowed to completion. 

Mix the water and the Soluphor P, and dissolve the Kollidon 17 PF in the mixture. Heat the solution to 75 °C. Add the sodium formaldehyde sulfoxylate and stir until dissolved. After the magnesium oxide has been suspended, slowly stir in the oxytetracycline until a clear solution is obtained. After the solution has cooled, set to pH 8.5 with aminoethanol. 

The reducing agent e.g. sodium formaldehyde sulfoxylate (Rongalite, C, BASF) must be selected in accordance with the legislation of the corresponding country. 

Sodium 5 ethyl-5-(l -methyl-propyl)-2-thiobarb1turate, AS41 Sodium formaldehyde sulfoxylate, AA28... 

Keywords sodium dithionite, sodium formaldehyde sulfoxylate, benzyl halide, dibenzyl sulfone... 

An analogous procedure was carried out with benzyl bromide (17.1 g, 0.1 mol), sodium formaldehyde sulfoxylate dihydrate (10.35 g, 0.06 mol) and sodium carbonate (10.35 g, 0.075 mol) to obtain the pure dibenzyl sulfone (9.35 g, 76% after recrystallization). 

A polyvinyl acetate latex prepared by semi-continuous polymerization at 55° using a polymethacrylic acid-nonylphenol-poly-ethoxylate phosphate ester emulsifier and sodium persulfate-sodium formaldehyde sulfoxylate initiator (23). The latex was cleaned by ion exchange and serum replacement using both Nuclepore and Pellicon membranes, and the cleaned latex and serum fractions were analyzed by conductometric titration. In addition, the dried films were extracted with water and organic solvents, and the extracts were analyzed by infrared spectroscopy and thermo-gravimetric analysis. 

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