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Product details
Sodium hexametaphosphate is strong in hygroscopicity and starts to become sticky after absorbing moisture. For some metal ions (such as calcium, magnesium, etc.) have the ability to generate soluble complexes, so it can be used to soften water. With lead, silver and other ions will also generate a precipitate, these precipitates dissolved in excess of sodium hexametaphosphate solution to form complexes, barium salt can also be generated with sodium hexametaphosphate complexes.
It is used as high efficient water softener for power station, boiler water for rolling stock, auxiliary agent for detergent, agent for controlling or preventing corrosion, cement hardening accelerator, streptomycin purifier, cleaning agent for fiber industry, bleaching and dyeing industry. It is used as sedative in medicine, preservative, stabilizer and juice precipitant in food industry.
In the petroleum industry, it is used for antirust of drilling pipe and controlling the viscosity of mud in oil drilling. It is also used in fabric printing and dyeing, tanning, papermaking, color film, soil analysis, radiochemistry and analytical chemistry.
China GB2760-1996 stipulates that sodium hexametaphosphate is allowed to be used as a food additive (water retention agent), which can be used in canned food, juice drinks, dairy products, soybean products; it is also used as a dispersant for dyes and a water treatment agent.
Uses and functions of sodium hexametaphosphate.
It is a texture improver, which has the effect of increasing the complex metal ions, pH value and ionic strength of food products, thus improving the adhesion and water-holding capacity of food products.
China's regulations can be used in dairy products, poultry products, ice cream, instant noodles and meat products, the maximum use of 5.0g/kg; in canned food, fruit juice (flavored) drinks and plant protein drinks, the maximum use of 1.0g/kg.
Used as water softener for boiler water and industrial water (including dyestuff production water, titanium dioxide production water, printing and dyeing pulp and dyeing water, cleaning color film copy water, as well as chemical water, pharmaceuticals, reagents, etc.), water treatment agent for industrial circulating coolant; also used as corrosion inhibitor, flotation agent, dispersing agent, high temperature bonding agent, dyeing auxiliaries, metal surface treatment, antirust, detergent auxiliaries, cement hardening promoter. Cement hardening promoter.
Copperplate paper production is used as a pulp diffusion agent to improve penetration. It is also used in detergents and chemical fibers to remove iron ions from the pulp. In the petroleum industry, it is used to prevent rusting of drilling pipes and to regulate the viscosity of mud when controlling oil drilling.
Preparation of sodium hexametaphosphate.
Product method of Bulk sodium hexametaphosphate Powder.
Sodium dihydrogen phosphate method will be liquid yellow phosphorus sprayed into the combustion chamber combustion, and air oxidation to generate phosphorus pentoxide, by hydration to generate phosphoric acid, dilute phosphoric acid added to the reactor, under stirring slowly add caustic soda solution at 80 ~ 100 ℃ to neutralize the reaction, so that the Ph value of 4 ~ 4.4, the generation of sodium dihydrogen phosphate solution, add alkali sulphide for purification, to remove impurities such as arsenic, heavy metals and other impurities, filtration, will be filtered, the filtrate through the Dehydration, at 750 ~ 850 ℃ through 20min melting reaction, to generate molten sodium hexametaphosphate, with cooling water for indirect cooling to quench the tablet, crushed to produce edible finished products of sodium hexametaphosphate
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