Iron persulfate

SYNS DIIRON TRISULFATE IRON PERSULFATE IRON SESQUTSULFATE IRON SULFATE (2 3) ... 

IRON PERSULFATE (10028-22-5) Fe2(S04)3 Light sensitive. Hygroscopic hydrolyzed slowly in water , forming acid solution and precipitates hydroxide and phosphate salts. Violent reaction with strong bases. Aqueous solution (often shipped as 73% solution) is incompatible with sulfuric acid, aluminum, caustics, alkylene oxides, ammonia, aliphatic amines, alkanolamines, amides, epichlorohydrin, organic anhydrides, isocyanates, magnesium, methyl isocyanoacetate, vinyl acetate. Corrosive to copper, copper alloys, and both mild and galvanized steel. 

The black oxide of the iron contains one volume of metal and two volumes of oxygen. Considering this, there results that the iron black oxide should be neutralized by an amount of acid containing two volumes of sulfur for each volume of iron, so that the number of the sulfur volumes of acid and the oxygen of base to should be equal. Yet the acid contains three times more oxygen respecting a base therefore, it was composed of three volumes of oxygen and a volume of sulfur. If, instead of the iron sulfate, the iron persulfate should be chosen, appears obvious that in this case the iron was combined with three volumes of sulfur, otherwise the result will be the same (Berzelius, 1813-1814). 

CAS 10028-22-5 EINECS/ELINCS 233-072-9 Synonyms Ferric sesquisulfate Ferric trisulfate Ferrisulfate Iron persulfate Iron sulfate... 

Iron persulfate. See Ferric sulfate Iron phosphate. See Ferric phosphate Iron protochloride. See Ferrous chloride Iron protosulfate. See Ferrous sulfate heptahydrate Ferrous sulfate anhydrous. 

Polymerizations were carried out in a jacketed, 1-gal, stirred, pressure tank reactor. Typical reactions were run by adding water, alcohol, or chain transfer agent, phosphate buffer, and persulfate to the reactor. The reactor was pressurized with CTFE monomer. Sulfite solution was fed at a rate to maintain reaction. Copper and iron ions were used at times as catalysts by adding cupric sulfate or ferrous sulfate.3 The product was filtered, washed with 90 10 water methanol followed with deionized water. The product was dried at 110°C. 

Oh S-Y, Kim H-W, Park J-M, Park H-S, Yoon C (2009) Oxidation of polyvinyl alcohol by persulfate activated with heat, Fe2-t, and zero-valent iron. J Hazard Mater 168 346-351... 

As to catalytic reactions in homogeneous media, Moritz Traube found in his studies of the oxidation of hydrogen iodide by hydrogen peroxide in aqueous solution, that the catalyst ferrous sulfate is activated by copper sulfate (5). As to the magnitude of such effects, Price stated in 1898 (6) that the simultaneous action of iron and of copper compounds on the reaction between persulfate and hydrogen iodide causes an unexpected acceleration of the reaction, which is more than twice as great as the acceleration calculated as an additive effect of the two single catalysts. However, effects were also observed of the opposite kind,... 

The iron sulfate crystallizes out from the titanium persulfate solution and can be recycled to make more sulfuric acid. The sulfate process uses the ore ilmenite as a raw material, while the chloride process requires rutile. Ilmenite can be converted to synthetic rutile. 

Iron Dilute 4.3 mL (5 g) of sample to 40 mL with water, and add about 40 mg of ammonium persulfate and 10 mL of ammonium thiocyanate TS. Any red color produced does not exceed that produced by 2.5 mL of Iron Standard Solution (25 pig Fe) (see Solutions and Indicators) in an equal volume of solution containing the same quantities of ACS Reagent-Grade Hydrochloric Acid and the reagents used in the test. Lead Determine as directed for Method I in the Atomic Absorption Spectrophotometric Graphite Furnace Method under Lead Limit Test, Appendix IIIB. 

Iron Add 2 mL of hydrochloric acid to 1 g of sample, and evaporate to dryness on a steam bath. Dissolve the residue in 2 mL of hydrochloric acid and 20 mL of water, add a few drops of bromine TS, and boil the solution to remove the bromine. Cool, dilute with water to 25 mL, then add 50 mg of ammonium persulfate and 5 mL of ammonium thiocyanate TS. Any red or pink color does not exceed that produced in a control containing 1.0 mL of Iron Standard Solution (10 P-g Fe). 

Solution 2 Dissolve 10 pig of iron (Fe) in an equal volume of solution containing 2 mL of hydrochloric acid and the same quantities of ammonium persulfate crystals and ammonium thiocyanate TS used in Solution 1. 

Toluene has been oxidized by the silver ion catalysed reaction with peroxy-disulfate. The reaction produces a mixture of bibenzyl, benzaldehyde and benzoic acids.299 Russian workers have described the conversion of 4-methoxy-toluene to the benzaldehyde by oxidation with peroxydisulfate in the presence of silver or copper ions and oxalic acid.300 The presence of copper salts in iron or copper catalysed peroxydisulfate oxidation is believed to suppress side-reactions.301 Phillips have patented a palladium(II)/tin(IV)/persulfate system for the oxidation of toluene derivatives.302 The reactions are carried out in carboxylic acid solvents (Figure 3.78). 

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