Potassium disulfate

K2O7S2 (s) K2S2O7 (s) Potassium Disulfate K2O7S2 (s) K2S2O7 (s)... 

Preparation of Products. A platinum reaction boat is carefully cleaned before each run by allowing it to remain immersed in fused potassium disulfate (pyrosulfate), K2S2O7, at least at red heat, for 15 minutes. A fume hood is necessary Upon removal from the disulfate, the platinum boat is immersed in boiling water for one-half hour in order to remove any traces of disulfate. Finally, the boat is rinsed well with distilled water and dried in a clean drying oven at 115°. Extreme care is taken not to touch or otherwise contaminate the boat. (This can be easily accomplished by using a clean white card to support the boat whenever it is necessary to transfer it. A stiff length of wire bent at one end to form a hook can be used to move and position the boat.) Samples that are used for the study of transport properties should be as pure as possible because these properties are influenced markedly by trace impurities. 

Divanadium(V) oxide catalysts are currently almost exclusively used. They are fused salts, which in a cold state consist essentially of vanadium sulfate and potassium disulfate, applied to a porous support (kieselguhr or diatomaceous earth). The change in valency state between and V -ions is probably a critical. step in the catalysis. The lowest operating temperature of this catalyst is generally ca. 420 to 440°C. 

Aluminum potassium alum Aluminum potassium disulfate. See Potassium alum anhydrous... 

Multiplicative Prefixes. The multiplicative prefixes bis, tris, etc., are used with certain anions for indicating stoichiometric proportions when di, tri, etc., have been preempted to designate condensed anions for example, A1K(S04)2 I2H2O, aluminum potassium bis(sulfate) 12-water (recall that disulfate refers to the anion S20jfi. 

Imidodisulfates can also be obtained by hydrolysis of nitridotrisulfates (see below). Figure 15.51 compares the structure of the imidodisulfate and parent disulfate ions, as determined from the potassium salts. Comparison with the hydroxyl-amine derivative K[HN(0H)S03] (below) is also instructive. 

Figure 15.51 Comparison of the structures of the imidodisulfate and disulfate ions in their potassium salts.

Interestingly, persulfate reacts differently with aliphatic and aromatic amines. Aliphatic primary amines are dehydrogenated to imines and further converted to aldehydes when reacted with peroxy disulfate , whereas aromatic primary amines are oxidized to nitroso compounds using potassium persulfate in the presence of H2SO4 (equation 14) °. 

The surface of polymeric materials such as polypropylene (PP), PS, polyacrylonitrile (PAN), and nylon was oxidized by immersing them in aqueous solution of oxidizing agents such as potassium peroxy disulfate under nitrogen purging at high temperatures [14]. Graft polymerization of water-soluble monomers such as AAm, methacrylic acid, and 3-aminopropyl methacrylate has been frequently performed in aqueous solution with the use of ceric ion, for instance, at... 

The first hydrogen peroxide plant to go on-stream based on the electrochemical process was in 1908 at the Osterreichische Chemische Werke in Weissenstein. The Weissenstein process was adapted in 1910 to afford the Miincher process developed by Pietzsch and Adolph at the Elecktrochemische Werke, Munich. In 1924, Reidel and Lowenstein used ammonium sulfate under the conditions of electrolysis instead of sulfuric acid, and the resulting ammonium peroxodisulfate (Reidel-Lowenstein process) or potassium peroxo-disulfate (Pietzsch-Adolph process) was hydrolysed to hydrogen peroxide. As a result of this process, production of hydrogen peroxide as 100% m/m rose to approximately 35 000 metric tonnes per annum.5... 

SYNS ANTHION PEROXYDISULFURIC ACID DIPOTASSIUM SALT POTASSIUM PEROXY-DISULFATE POTASSIUM PEROXYDISULPHATE POTASSIUM PERSULFATE pOT)... 

Copper sulfate, CuS04 5H20, is used for the oxidative coupling of terminal acetylenes [5S] for the conversion of a-hydroxy ketones (acyloins) into a-diketones [351, 352] and, in cooperation with potassium peroxy-disulfate, for the selective oxidation of methyl groups on benzene rings to aldehyde groups [355],... 

The regiospecific oxidation of dimethylanisoles to methoxymethyl-benzaldehydes is accomplished with copper sulfate and potassium peroxy-disulfate, which oxidize selectively only the methyls in the ortho or para positions with respect to the methoxy group (equation 171) [35J]. 

Basicity chrome alum CCRIS 7532 Chrome alum Chrome potash alum Chromic potassium sulfate Chromic potassium sulphate Chromium potassium bis(sulphate) Chromium potassium sulfate (1 1 2) Chromium potassium sulfate (CrK(S04)2) Chromium potassium sulphate Chromium(lll) potassium sulfate Crystal Chrome Alum EINECS 233401-6 Potassium chromic sulfate Potassium chromic sulphate Potassium chromium alum Potassium chromium disulfate (KCr(S04)2) Potassium disulphatochromate (III) Sulfuric acid, chromium(3 ) potassium salt (2 1 1). Mordant for dyeing fabrics uniformly [dodecahydratej mp = 89° d = 1.83 soluble in 4 parts H2O. 

The synthesis of amines with sulfonic acid groups, 4,4 -bis(4-aminophenoxy)benzophenone-3,3 -disulf-onic acid and 4,4 -bis(4-aminophenylthio)benzoph-enone-3,3 -disulfonic acid, starts from 4,4 -dichlorobenzophenone by sulfonation with sulfuric acid. In the second step, 4-aminophenoI is coupled in the presence of anhydrous potassium carbonate [100]. 

Various vinyl monomers were grafted onto nylon fibers by using benzoyl peroxide in the presence of inorganic salts such as sodium or potassium chloride and sodium or potassium sulfate[42,43]. The vinyl monomers include acrylic acid, methyl acrylate, ethyl acrylate, methyl methacrylate, styrene, acrylonitrile, and mixtures of these monomers. Sakurada. et al. [43,44] investigated grafting eflBciency for various radical initiators. They foimd that pero disulfate systems... 

PANI and its derivatives can be synthesized by the electrochemical polymerization or chemical polymerization of aniline although some other approaches have also been reported such as solid-state polymerization [313], electroless polymerization [314], plasma polymerization [315], and emulsion polymerization [307], Various oxidants were used for oxidation of aniline monomer, such as ammonium peroxy-disulfate, sodium peroxydisulfate, potassium bichromate, and hydrogen peroxide. 

Mauve Mixture of four related aromatic compounds related to the safranines 1856 Cl 50245 WH Perkin (1838-1907) Impure aniline disulfate with potassium dichromate... 

A homologous series of a,co-perfluorodicarboxylic acids (n= 1-16) were recently synthesized by a controlled free radical polymerization of tetrafluoroethylene using aqueous potassium peroxy-disulfate with either an iron or copper promoter. The dominant products were the even-numbered members, as demonstrated by the proposed mechanism in Scheme 26. It was shown that the odd-numbered carbon chains result from oxidative decarboxylation. 

Redox reactions involving peroxides are another ejBhcient way to prepare telechelics. Hydroxyl-terminated polydienes [37] and carboxylic acid-terminated polytetrafluoroethylenes [38] were synthesized by using H2O2 and potassium peroxy disulfate, respectively, via redox reactions. 

The mixture of galactans from cystocarpic samples of I. undulosa (Cc) were fractionated (Table 2) and treated as depicted in Fig. 4 (Flores, Cerezo, Stortz 2002). Bulk precipitation of Cc with 2M KCl yielded 62 % of an insoluble product (Cl, K/r-carrageenans) and 31% of a soluble one (Cs, p/v-carrageenans). Alkaline treatment of Cl and Cs proceeded with excellent yields (93-95%), giving CIT and CsT in which the precursor units (4-linked a-galactose 6-sulfate and 2,6-disulfate) were cycllzed. Both products were fractionated by precipitation with increasing concentrations of potassium chloride, yielding three fractions insoluble at O.IM, IM, and 2M KCl and one soluble at the latter concentration (Table 3). 

Rajanna, K.C., Reddy, K.N., Kumar, U.U., Saiprakash, P.K.A. A kinetic study of electron transfer fix>m L-ascorbic acid to sodium perborate and potassium peroxy disulfate in aqueous acid and micellar media. Int. J. Chem Kinet. 1996,28(3), 153-164. 

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