Showing papers on "Sodium chlorate published in 1988"

Production of chloric acid

Abstract: Chloric acid is produced in an electrolytic-electrodialytic process in which chlorate ions from a sodium chlorate solution are transferred through an anion-exchange membrane to combine with electrolytically-produced hydrogen ions in a compartment of a cell, from which the resulting chloric acid is recovered. The sodium ions are transferred through a cation-exchange membrane to combine with electrolytically-produced hydroxyl ions in another compartment of the cell, from which the resulting sodium hydroxide is recovered.

Electro-erosion machining liquid

Abstract: This is a compound machining liquid of electrolyzation and electric spark. The electro-erosion machining liquid is consisted of 10%-20% sodium nitrate, 1%-10% sodium carbonate, 3%-5% sodium chlorate, 0.5%-1% disodium hydrogen phosphate, 1%-3% potassium dichromic acid, 3%-6% potassium sodium tartrate, 3%-65 sodium hydrate, 1%-5% sodium fluoride and water (by weight). It is suitable for compound maching of electrolyzation and electric spark in low voltage condition, electric current is 5-1000A. Efficiency and accuracy are high.

Iron blue pigment, process for its pigmentation and use

Abstract: Iron blue characterized by an ammonium content of ±5.5 weight %, a potassium content of <0.1 weight %, a sodium content of <0.1 weight %, a color strength in a toluene intaglio printing ink up to 15% greater than the standard Vossen blue 705/80 (calculated in accordance with DIN 53 234) and the color spacings (determined in accordance with DIN 6174 relative to Vossen blue 705/80 as standard) of Δa*:6.5±0.5 Δb*:1.3±0.3 Δc*:-1.5±0.5 It is prepared by placing an aqueous solution of sodium hexacyanoferrate (II) in a reaction vessel at a pH of 7.0 and a concentration of 45±5 g/l, calculated as Fe(CN) 6 together with ammonium sulfate having a concentration of 14±1 g/l at a temperature of 22°-23° C., adding an aqueous iron-II sulfate solution at a pH of 2.0, a concentration of 100±10 g/l, and a temperature of 22°-23° C., and precipitating the white dough until an excess of iron up to 1.4-1.7/1, calculated as Fe, is attained in the filtrate, then washing the white dough by decantation until the filtrate indicates a conductivity of 5000 to 5500 μS and has an excess of iron of 0.1-0.2 g/l, calculated as Fe in the filtrate, then stirring in 58±6 g ammonium sulfate and boiling the white dough for a period of ≧2 hours, thereupon adding, at a temperature of 70°±5° C., first ≧90 g HCl as a 10-15% aqueous solution, then ≧51 g sodium chlorate as an aqueous solution having a concentration 270±30 g/l. The iron blue pigment can be used in printing inks.