Sodium Tripolyphosphate/STPP CAS:7758-29-4

Sodium Tripolyphosphate (STPP) is an indispensable chemical compound valued for its ability to soften water, enhance cleaning performance, improve food texture and stability, and act as a dispersant and processing aid in diverse industrial applications. Its effectiveness as a chelator, sequestrant, buffer, and emulsifier underpins its widespread utility. Food-grade STPP is specifically used to improve the quality, binding properties, and shelf-life of various food products, while technical-grade STPP is fundamental in water treatment, detergent formulation, and numerous manufacturing processes requiring dispersion and stabilization.

1. Water Treatment (Softening): STPP is highly valued as an efficient water softener. It sequesters calcium and magnesium ions responsible for water hardness, preventing scale formation. This makes it essential in:

• Industrial Cooling Systems: Protecting boilers and cooling systems in power plants, locomotive units, and fertilizer manufacturing facilities.
• General Industrial Water Conditioning: Used broadly to soften water in various industrial processes.

2. Detergent and Cleaning Industry: STPP is a critical component in synthetic detergents and soaps, serving multiple roles:

• Builder: Enhances the cleaning efficiency of surfactants by softening water, suspending soil, and preventing redeposition onto fabrics or surfaces.
• Soap Synergist: Improves the performance of soaps and prevents issues like "blooming" (fatty acid or oil separation) and "crystallization" in bar soaps.
• pH Buffer: Helps maintain the optimal alkaline pH for cleaning efficacy in soap solutions.

3. Food Industry (Food Grade STPP): When produced to food-grade standards, STPP serves as a significant food additive and processing aid, primarily acting as a:

• Quality Improver & Texturizer: It enhances the texture and quality of food products, particularly protein-rich items like meats and seafood.

It achieves this by:

• Improving Water Holding Capacity & Binding: Increases the juiciness, tenderness, and overall yield of processed meats (e.g., ham, sausages) and fish products.
• Chelating Metal Ions: Binds metal ions that can catalyze spoilage or cause discoloration.
• pH Adjustment & Ionic Strength: Modifies pH and ionic strength, improving protein functionality and stability.
• Emulsification: Helps stabilize fat emulsions in certain food systems.
• Specific Applications: Used in canned ham for tenderization, in canned beans (like broad beans) to soften skins, and as a clarifying agent in beverages.

4. Industrial Processing & Manufacturing: STPP finds extensive use as a processing aid in numerous sectors due to its dispersing, emulsifying, and sequestering properties:

• Dispersant: Effectively disperses solids in liquids, crucial in industries handling pigments, clays, and minerals. It is used for suspending paints, coatings, kaolin (china clay), magnesium oxide, calcium carbonate, and in controlling drilling mud viscosity in oilfield operations.
• Textile Industry: Employed as a dyeing assistant and processing aid.
• Leather Tanning: Used as a pre-tanning agent.
• Paper Industry: Functions as an anti-greasing agent to prevent oil stains.
• General Emulsification: Exhibits strong emulsifying action for lubricating oils and fats.
• Buffer & Stabilizer: Acts as a pH buffer and stabilizer in various chemical processes.

Pentasodium triphosphate, STPP, Armofos, Thermphos, freez-gardfp19, natriumtripolyphosphat, rhodiaphoslv

Package: 25kg bag, 1FCL=25MT kraft paper bags/plastic woven bags with PE liner,25kg/bag net weight

Have specific requirements? Our team is ready to tailor a packaging solution for your business. Get in touch today!

Three Production methods

Sodium tripolyphosphate by phosphoric acid by soda and sodium orthophosphate, followed by condensation. There are two kinds of methods to produce phosphoric acid by wet and heat method. Wet process is to phosphate and inorganic acid (usually with sulfuric acid, hydrochloric acid can also be used) after the reaction, the extraction and purification of phosphoric acid. Calorimetry is in electric furnace with coke and silica, phosphate ore roasting, reduction of phosphorus and phosphorus minerals, oxidation and hydration, namely phosphate.

The process of preparing sodium phosphate from phosphate is relatively simple, the process is short, and the control is easy to operate. There are two main ways.

The spray drying process of the two stage of the converter condensation method: the spray dryer is a cylinder, and the upper part is connected with a horizontal burner with a gas nozzle. The gas temperature is 400~500, and the gas is passed through the burner through the upper part of the spray drying tower, and a high pressure (4.2MPa) pump is used to spray the solution of the positive phosphate into the air. Drying products with less than 5% of the water content are removed from the lower part of the dryer. The positive phosphate mixture is condensed into sodium phosphate in a rotary furnace. The method is characterized in that the product does not need to be crushed, the spray dryer has high drying efficiency, the drying material is very uniform, and the stratification phenomenon can not occur. The disadvantage is that the drying and condensation of two sections, the direct heating of the dust loss when dehydration.

A section of drying dehydration method: the slurry is sprayed into the rotary furnace, the furnace nozzle into the hot gas or burning oil to heat. The annular baffle plate is divided into a flame section and a heating section. In the heating section, the final dehydration of the material is condensed and converted into sodium phosphate. The cooling tube and the rotating furnace are integrated by granular product out of the cooling cylinder in the mill grinding, a small amount of powder taken from the furnace in the material recycling in a cyclone separator. This method will be dry, dehydration and cooling combined in a unit of equipment, so that the process greatly simplified, high heat utilization, and can reduce infrastructure investment, improve labor conditions.

Precautions

Do not ingest. Do not breathe dust. In case of insufficient ventilation, wear suitable respiratory equipment. If ingested, seek medical advice immediately and show the container or the label. Avoid contact with skin and eyes Keep away from incompatibles such as oxidizing agents, acids.

Storage

No specific storage is required. Use shelves or cabinets sturdy enough to bear the weight of the chemicals. Be sure that it is not necessary to strain to reach materials, and that shelves are not overloaded.

As a professional supplier of Sodium Tripolyphosphate (STPP) with over ten years of experience, Sinoright guarantees a long-term, stable, and continuous supply of Sodium Tripolyphosphate (STPP) products and looks forward to establishing a long-term partnership with you.

Get your free sample

Hot Tags: sodium tripolyphosphate/stpp cas:7758-29-4, China sodium tripolyphosphate/stpp cas:7758-29-4 manufacturers, suppliers, factory, 100 pea protein isolate, organic pea protein isolate, nutrasweet sweetener