Sodium Tripolyphosphate stpp Raw Materials Sodium Tripolyphosphate Powder

CAS:7758-29-4

MF:Na5O10P3

MW:367.86

EINECS:231-838-7

Specification: 99% min Sodium Tripolyphosphate Powder

Sample:Eicosapentaenoic Acid Powder

Packaging:1kg/bag, 25kg/drum

Brand: Henrikang

Appearance:White powder

Storage: Cool Dry Place

Shelf Life: 2 Years

Test Method: HPLC

Sodium Tripolyphosphate Powder Usage and Synthesis.

Sodium tripolyphosphate is a widely used additive in detergent, textile, water softening, boiler descaling, drilling, metal beneficiation and other fields. It has good properties of emulsification, synergism, water softening and pH adjustment. At present, some new methods of producing sodium tripolyphosphate have been studied. The performance characteristics of sodium tripolyphosphate include white granular or powder, density 0.35-0.90g/cm3, melting point 622℃, soluble in water, aqueous solution is alkaline.

Uses of Sodium Tripolyphosphate.

Sodium tripolyphosphate is used in detergents, as an auxiliary, soap synergist and prevent bar soap crystallization and frosting, industrial water softener, tanning pre-tanning agent, dyeing auxiliaries, oil well digging mud control agent, oil stain prevention agent for paper making, effective dispersing agent for the treatment of suspensions in paints, kaolin, magnesium oxide, calcium carbonate and so on. Edible grade sodium tripolyphosphate can be used as food improver for various fish and meat products, clarifying agent for beverages.

It can be used as food improver for fish and meat products, clarifying agent for beverages. It can also be used as food improver to increase the complexing metal ions, pH value and ionic strength of food products, thus improving the adhesion and water retention of food products. China's regulations can be used in dairy products, Chemicalbook products, poultry products, ice cream and instant noodles, the maximum use of 5.0g/kg; in canned food, fruit juice (flavor) drinks and plant protein drinks, the maximum use of 1.0g/kg.

It is used as high efficient water softener for cooling water treatment in power stations, rolling stock, boilers and fertilizer plants. It has strong ability to complex Ca2+, 19.5g of calcium can be complexed per 100g, and due to the chelating effect and adsorption and dispersion of SHMP, it destroys the normal growth process of calcium phosphate crystals, and prevents the formation of calcium phosphate scale. The dosage is 0.5mg/L, and the rate of preventing scale formation is 95%~100%.

Application of Sodium Tripolyphosphate Powder

Sodium tripolyphosphate has the functions of chelation, suspension, dispersion, peptization, emulsification, pH buffering, etc. It can be used as the main auxiliary agent of synthetic detergents, industrial water softener, leather pretanning agent, dyeing auxiliary, organic synthesis catalyst, pharmaceutical industry dispersant and food additive, etc. In addition to exporting STPP, domestic STPP consumption is mainly concentrated in the detergent industry, food, ceramics, etc.

Preparation of Bulk Sodium Tripolyphosphate Powder.

Sodium tripolyphosphate is traditionally prepared by neutralizing hot phosphoric acid with a soda ash suspension with a mass fraction of H3PO4 of 75% to produce a neutralized slurry with Na/P of 5:3, which is held at 70°C to 90°C; after which the obtained slurry is sprayed into a polymerization furnace to dehydrate at high temperature and condense into sodium tripolyphosphate at about 400°C.

Product Methods of Sodium Tripolyphosphate.

Two-step method of hot phosphoric acid: neutralize hot phosphoric acid with soda ash to generate disodium hydrogen phosphate and sodium dihydrogen phosphate, then mix the two sodium salts in a certain proportion and polymerize them, and then obtain sodium tripolyphosphate product after drying and other processes.

One-step method of wet phosphoric acid: wet phosphoric acid is directly reacted with soda ash, and the generated sodium phosphate salt is directly polymerized to generate sodium tripolyphosphate by controlling the reaction conditions. This method has relatively low production cost, but has high quality requirements for the raw material wet phosphoric acid, and the wet phosphoric acid needs to be pre-treated by impurity removal.