Sodium Hexametaphosphate (SHMP) 68%

Sodium Hexametaphosphate (SHMP) 68%

Textile Chemical: Sodium Hexametaphosphate (SHMP) 68% is used as water softener for boiler water and industrial water (including dye production water, titanium dioxide production water, printing and dyeing and dyeing water, cleaning color film copy water, chemical water, medicine, reagent production water, etc.), industrial cycle Water treatment agent for cooling water; also used as corrosion inhibitor, flotation agent, dispersant, high temperature binder, dyeing auxiliary, metal surface treatment, rust inhibitor, detergent builder, cement hardening accelerator. Coated paper is produced as a slurry diffusing agent to increase penetration. It is also used in washing vessels and chemical fibers to remove iron ions from the pulp. The rust prevention of the drilling pipe in the petroleum industry and the control of the viscosity of the mud during oil drilling.

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Product Details

Sodium Hexametaphosphate (SHMP) 68%

 

Overview

Sodium Hexametaphosphate (SHMP) 68% is a kind of sodium metaphosphate polymer, also known as "sodium polymetaphosphate", "sodium polymetaphosphate", "sodium metaphosphate glass", "Graham salt", the appearance of colorless transparent glass Solid or white powder, which has a higher solubility in water, but the dissolution rate is slower, and the aqueous solution is acidic. The complex of the divalent metal ion is more stable than the complex of the monovalent metal ion and is easily hydrolyzed to orthophosphate in a warm water, acid or alkali solution. Sodium Hexametaphosphate (SHMP) 68% is more hygroscopic and begins to become sticky after moisture absorption. For certain metal ions (such as calcium, magnesium, etc.) have the ability to form soluble complexes, it can be used to soften water. Precipitation is also formed with lead and silver ions. These precipitates are re-dissolved in an excess of Sodium Hexametaphosphate (SHMP) 68% solution to form a complex, and the phosphonium salt can also form a complex with Sodium Hexametaphosphate (SHMP) 68%. It is used as a high-efficiency softener for power station boilers, boiler water, detergent additives, control or anti-corrosion agents, cement hardening accelerators, streptomycin purifiers, fiber industry, bleaching and dyeing industry cleaning agents. It is used as a sedative in medicine and as a preservative, stabilizer and juice precipitant in the food industry. In the petroleum industry, it is used to rust the drill pipe and to control the viscosity of the mud during oil drilling. It also has certain uses in fabric printing, tanning, paper making, color film, soil analysis, radiochemistry and analytical chemistry. China GB2760-1996 stipulates that Sodium Hexametaphosphate (SHMP) 68% is a permissible food additive (moisture retaining agent), which can be used for canned food, fruit juice beverage, dairy product, soy product; also used as dye dispersant and water treatment agent.

 

Sodium Hexametaphosphate (SHMP) 68% Toxicity

Adl 0 ~ 70 mg / kg (in terms of phosphorus). LD^50}4g/kg (rat, oral). According to China's GB 2760-86 regulations, it is allowed to be used as a quality improver for cans, juice drinks, dairy products and soymilk. The maximum usage is 1.0 g/kg. When used as a composite phosphate, the total amount of phosphate may not exceed 1.0 g/kg, and the condensed milk shall not exceed 0.50 g/kg.

 

Sodium Hexametaphosphate (SHMP) 68% Chemical properties

Colorless transparent glass flakes or white granular crystals. Soluble in water, insoluble in organic solvents.


Application

1. Used as food quality improver, pH adjuster, metal ion chelating agent, dispersing agent, expansion agent, etc. in the food industry

2. Used as a common analytical reagent, water softener, also used for photofinishing and printing

3. Used as water softener, detergent, preservative, cement hardener, fiber and bleaching cleaning agent, also used in medicine, food, printing and dyeing, tanning, paper making, etc.

4. Tissue improver; emulsifier; stabilizer; chelating agent. Used alone, it is generally used in combination with pyrophosphate and metaphosphate. The mixture is mainly used as a softening tissue improver such as ham, sausage, and surimi as water retention, tenderization, and old residual meat. Prevent crystallization of canned crabs, pectin melting agents, etc.

5. Used as water softener for boiler water and industrial water (including dye production water, titanium dioxide production water, printing and dyeing and dyeing water, cleaning color film copy water, chemical water, medicine, reagent production water, etc.), industrial cycle Water treatment agent for cooling water; also used as corrosion inhibitor, flotation agent, dispersant, high temperature binder, dyeing auxiliary, metal surface treatment, rust inhibitor, detergent builder, cement hardening accelerator. Coated paper is produced as a slurry diffusing agent to increase penetration. It is also used in washing vessels and chemical fibers to remove iron ions from the pulp. The rust prevention of the drilling pipe in the petroleum industry and the control of the viscosity of the mud during oil drilling.

6. The quality improving agent of the work has the functions of improving the complex metal ions of the food, the pH value, and increasing the ionic strength, thereby improving the cohesiveness and water holding capacity of the food. China's regulations can be used for dairy products, poultry products, ice cream, instant noodles and meat products, the maximum use amount is 5.0g / kg; the maximum use amount in cans, juice (flavor) drinks and vegetable protein drinks is 1.0g / kg.

7. It is mainly used as water softener for boiler water, softener for printing and dyeing bath and papermaking diffusing agent. Also used as corrosion inhibitors, flotation agents, dispersants and high temperature binders. Others are used in washing vessels and chemical fibers to remove iron from the pulp. Also used for soil analysis.

8. Used as a food quality improver in the food industry for cans, juice drinks, dairy products, soymilk. It can be used as a Ph regulator, a metal ion chelating agent, an adhesive, a swelling agent, and the like. It can be used for beans, canned fruits and vegetables, can stabilize natural pigments and protect food color. It can be used in meat cans to emulsify fat and maintain uniform texture. It can be used in meat foods to improve water retention and prevent fat deterioration in meat. Add to the beer to clarify the wine and prevent turbidity.

 

Sodium Hexametaphosphate (SHMP) 68% Production method

1.Sodium dihydrogen phosphate method, the liquid yellow phosphorus is sprayed into the combustion chamber for combustion, and is oxidized with air to form phosphorus pentoxide, hydrated to form phosphoric acid, and dilute phosphoric acid is added to the reactor, and the caustic soda solution is slowly added to the mixture under stirring. The neutralization reaction is carried out at 100℃ to obtain a Ph value of 4 to 4.4, and a sodium dihydrogen phosphate solution is formed, and a sulfide base is added for purification to remove impurities such as arsenic and heavy metals, and the filtrate is dehydrated and passed at 750 to 850℃ for 20 min. The fusion polymerization reaction produces molten Sodium Hexametaphosphate (SHMP) 68%, indirect cooling with cooling water to quench the tablet, and pulverizes to obtain a finished Sodium Hexametaphosphate (SHMP) 68% product. Its

H3PO4+NaOH→NaH2PO4+H2O

6NaH2PO4→(NaPO3)6+6H2O

2. Food grade products usually use the sodium dihydrogen phosphate method. Neutralize the phosphoric acid with soda ash, control the Ph value between 4.0 and 4.4, that is, obtain the sodium dihydrogen phosphate solution; send the solution into the polymerization furnace and heat and dehydrate at 700℃ for 15 to 30 minutes to obtain molten Sodium Hexametaphosphate (SHMP) 68%. Add water to the product, and then smash it to obtain the product.

NaH2PO4→(NaPO3)6+6H2O

3. Sodium dihydrogen phosphate method Sodium chlorate solution and phosphoric acid are neutralized at 80-100℃ for 2 h, and the resulting sodium dihydrogen phosphate solution is concentrated by evaporation, cooled and crystallized to obtain sodium dihydrogen phosphate dihydrate, and heated to 110 ~. Two crystal waters were removed at 230℃, heating was continued to remove the structural water, and further heated to 620℃ to dehydrate, the resulting sodium metaphosphate melt was polymerized into Sodium Hexametaphosphate (SHMP) 68%. Then, it is discharged, and is prepared by quenching from 650℃ to 60 to 80℃, and pulverized to obtain a finished Sodium Hexametaphosphate (SHMP) 68% product. its

Na2CO3+2H3PO4+H2O→2NaH2PO4?2H2O+CO2↑

NaH2PO4?2H2O[?]→Na2H2PO4+2H2O

2NaH2PO4[△]→Na2H2P2O7+H2O

Na2H2P2O7→2NaPO3+H2O

6NaPO3[△]→(NaPO3)6

The phosphorus pentoxide method combines phosphorus pentoxide and soda ash which are obtained by burning and cooling yellow phosphorus in a dry air stream with a certain ratio (Na2O: P2O5 = 1 to 1.1). The mixed powder is indirectly heated in a graphite crucible to be dehydrated and melted, and the resulting Sodium Hexametaphosphate (SHMP) 68% melt is rapidly cooled and pulverized to obtain a finished industrial Sodium Hexametaphosphate (SHMP) 68% product. its

P4+5O2→2P2O5

P2O5+Na2CO3→2NaPO3+CO2↑

6NaPO3[△]→(NaPO3)6

4. Add sodium hydroxide to the phosphoric acid, heat and dehydrate at 540-580℃ for about 2 h, the obtained is a stable type I (Na: P = 5: 3); if heated to 620℃ first, then at 550℃ Dehydration, and then cooling to 100-150℃ in air, the resulting is a metastable state II.


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