Chemical Products
Sodium Tripolyphosphate (STPP)
Sodium Tripolyphosphate (STPP / 三聚磷酸钠) is a kaolin dispersant (deflocculant). It helps liberate and disperse iron so a magnetic separator can capture iron more effectively, raising kaolin and ceramic slurry/glaze whiteness. Formula Na₅P₃O₁₀; 25 kg bag (N.W. 25 kg / G.W. 25.1 kg), Made in China. Typical COA (GB/T9983-2004): STPP 93.9% (≥90), P₂O₅ 58.4% (≥56.5). Quotation by inquiry — no price on this page.
- Kaolin dispersant (deflocculant) for iron liberation ahead of magnetic separation
- Helps magnetic separators capture iron → higher whiteness
- Na₅P₃O₁₀ · N.W. 25 kg / G.W. 25.1 kg · Made in China
- Type I (一型): higher Type I content → higher temperature rise on dissolving
- Pairs with PTMS electromagnetic slurry / wet magnetic separators
Specifications
Bag-label and example COA facts only — no invented grades or prices. Role: kaolin / ceramic slurry dispersant (deflocculant) that helps liberate iron for magnetic separator iron removal and higher whiteness.
| Parameter | Value |
|---|---|
| Product | Sodium Tripolyphosphate (STPP / 三聚磷酸钠) |
| Chemical formula | Na₅P₃O₁₀ |
| Role | Kaolin / ceramic slurry dispersant (deflocculant) |
| Process effect | Helps liberate iron for magnetic separator iron removal → higher whiteness |
| Forms | Anhydrous and hexahydrate forms exist |
| Type I note | Higher Type I (一型) content → higher temperature rise when dissolving in water |
| STPP content (COA measured / standard) | 93.9% (standard ≥90.0) |
| P₂O₅ (COA measured / standard) | 58.4% (standard ≥56.5) |
| Iron Fe (COA measured / standard) | 0.006% (standard ≤0.015) |
| Water-insoluble (COA measured / standard) | 0.03% (standard ≤0.1) |
| Whiteness (COA measured / standard) | 90% (standard ≥85) |
| pH (COA measured / standard) | 9.53 (standard 9.2–10) |
| Executive standard | GB/T9983-2004 |
| COA batch / result | 202560610 / Qualified |
| Net weight (N.W.) | 25 kg per bag |
| Gross weight (G.W.) | 25.1 kg per bag |
| Origin | Made in China |
| Supplier | FOSHAN POWTECH TECHNOLOGY COMPANY LIMITED (PTMS) |
Product details
Answer first: Sodium Tripolyphosphate (STPP / 三聚磷酸钠) is a kaolin dispersant (deflocculant). It helps liberate and disperse iron so a magnetic separator can capture iron more effectively, raising kaolin and ceramic slurry/glaze whiteness. Formula Na₅P₃O₁₀; 25 kg bag (N.W. 25 kg / G.W. 25.1 kg), Made in China. Typical COA (GB/T9983-2004): STPP 93.9% (≥90), P₂O₅ 58.4% (≥56.5). Quotation by inquiry — no price on this page.
On a kaolin or ceramic slurry/glaze line, operators dose STPP (sodium tripolyphosphate / 三聚磷酸钠) as a dispersant / deflocculant so particles and iron-bearing minerals are liberated in the slurry. The PTMS electromagnetic slurry or wet magnetic separator then removes iron more effectively, which supports higher whiteness. STPP does not replace the magnetic separator — it prepares the slurry for iron removal.
Forms and Type I (一型)
STPP is available as anhydrous or hexahydrate. When the product is hexahydrate-related or Type I focused: higher Type I (一型) content means a higher temperature rise when dissolving in water. State your preferred form and Type I requirement in the inquiry.
Material and equipment keywords
STPP · sodium tripolyphosphate · 三聚磷酸钠 · Na₅P₃O₁₀ · kaolin dispersant · deflocculant · iron removal · magnetic separator · electromagnetic slurry separator · whiteness · ceramic slurry · ceramic glaze · feldspar · quartz · P₂O₅ · Type I 一型 · 25 kg bag · PTMS / FOSHAN POWTECH TECHNOLOGY COMPANY LIMITED.
Related chemical dispersant
Also see Sodium Hexametaphosphate (SHMP) — another phosphate dispersant / deflocculant for the same iron-liberation and whiteness goal on kaolin and ceramic lines.
How to inquire
Email sales@powtechina.com or WhatsApp +86 139 2990 7491 with bag quantity, destination, and form/Type I preference. Quotation only — this page lists no prices.
Questions and answers
What is Sodium Tripolyphosphate (STPP) used for?
STPP (三聚磷酸钠) is a kaolin dispersant (deflocculant). It helps liberate and disperse iron so a magnetic separator can capture iron more effectively, raising kaolin and ceramic slurry/glaze whiteness. Formula Na₅P₃O₁₀; 25 kg bag, Made in China.
How does STPP help magnetic separation and whiteness?
As a kaolin dispersant / deflocculant, STPP disperses fine particles and helps liberate iron-bearing impurities in the slurry. A wet electromagnetic slurry magnetic separator (PTMS) can then capture that iron more effectively, which improves product whiteness on kaolin, feldspar, quartz and ceramic body or glaze lines.
Does STPP replace a magnetic separator?
No. STPP prepares the slurry; the magnetic separator performs iron removal. Used together they support higher whiteness. PTMS supplies both STPP and electromagnetic slurry / wet magnetic separators.
Anhydrous vs hexahydrate — and what about Type I (一型)?
STPP exists in anhydrous and hexahydrate forms. For Type I (一型) focus: higher Type I content leads to a higher temperature rise when dissolving in water. Confirm the form and Type I preference when you inquire.
What are the bag and COA specifications?
Bag label: SODIUM TRIPOLYPHOSPHATE, STPP, Na₅P₃O₁₀, N.W. 25KGS, G.W. 25.1KGS, MADE IN CHINA. Example COA (batch 202560610, GB/T9983-2004, Qualified): STPP 93.9% (≥90), P₂O₅ 58.4% (≥56.5), Fe 0.006% (≤0.015), water-insoluble 0.03% (≤0.1), whiteness 90% (≥85), pH 9.53 (9.2–10). No other specs are claimed on this page.
How does STPP relate to SHMP?
Both STPP and Sodium Hexametaphosphate (SHMP) are phosphate dispersants / deflocculants used on kaolin and ceramic lines to help liberate iron ahead of magnetic separation for higher whiteness. Buyers often compare both; inquire for the grade that fits your slurry.
Who supplies this STPP and how do I inquire?
FOSHAN POWTECH TECHNOLOGY COMPANY LIMITED (PTMS / POWTECH), Foshan, China. Email [email protected] or WhatsApp +86 139 2990 7491 with bag quantity, destination, and preferred form/Type I. Quotation by inquiry — no price on this page.
