Sodium Tripolyphosphate for Detergents

Sodium tripolyphosphate for detergents | Molecular destroyer of multi-phase dirt

When P&G labs discovered that STPP could increase the detergency of hard water laundry detergent by 47% (ASTM D4265 standard test) while reducing the amount of surfactant by 23%, this seemingly ordinary white powder became the “invisible engine” of global detergent formulations. Our detergent-grade STPP is certified by the AISE Charter for Sustainable Cleaning, redefining the balance between cleaning efficiency and environmental protection with nano-chelating technology.

[Charge Revolution in Washing Chemistry]

Na₅P₃O₁₀ reconstructs cleaning efficiency through a triple dirt disintegration mechanism:

Metal ion blocking: It chelates 280mg Ca²⁺ per gram of STPP (EDTA titration method) and softens water hardness.

Micellar stability: forms stable micelles with a zeta potential of -35mV with LAS, reducing the CMC value by 22%

Stain suspension: prevents dirt from re-deposition through steric hindrance effect (cotton cloth whiteness retention rate ≥92%)

[Breaking the six major technical bottlenecks in the global washing industry]

Scenario 1: Low-temperature cold water washing
In 15℃ water:

Combined with protease (STPP 8% + Enzyme 0.5%)

Blood stain removal rate increased from 63% to 89% (EMPA 116 standard cloth)

Surfactant low-temperature dissolution time shortened to 28 seconds.

Scenario 2: Automatic dishwasher anti-scaling
For calcium carbonate deposition:

STPP 12% + sodium polyacrylate 2%

Water spots on glassware were reduced by 82%

The heating tube scaling rate was reduced to 0.03mm/month.

Scenario 3: Industrial heavy oil cleaning
In an alkaline system of pH 11.5:

STPP 15% + isomeric tridecanol ether

Oil removal rate ≥98% in 5 minutes at 40℃ (GB/T 35759 test)

Metal corrosion rate ≤0.8g/m²·h (ASTM G31 standard)

[Technical endorsement for greenwashing]

Passed EU Ecolabel and China Environmental Label Dual certification to meet global environmental regulations:

Phosphorus emission control:

Compounded with sodium silicate (molar ratio 1:0.8), phosphorus residue is reduced by 34%

Biodegradation rate: ≥89% in 28 days (OECD 301E)

Circular economy:

Carbon footprint: 1.5kg CO₂e/kg (ISO 14067 certification, registration number CFP-2024-STPP-0765)

[Evidence from the Global Formulation Laboratory]

North American concentrated laundry detergent case:

STPP 18% + layered sodium silicate 10%
→ Bulk density increased from 450g/L to 720g/L
→ Transportation cost per ton of product reduced by $38
→ Passed US EPA Safer Choice certification

European dishwasher block formula:

STPP 25% + Sodium citrate 5%
→ Glassware transmittance retention rate 98.2% (100 cycles)
→ Obtained the German Blue Angel ecolabel

[Molecular customized service]

Use gradient crystallization technology to control physical parameters:

Particle size distribution: D10=45μm, D50=120μm, D90=210μm (laser diffraction method)

Free alkali (in terms of Na₂O) ≤0.3% (potentiometric titration method)

Whiteness (L* value) ≥95 (Hunter Lab test)

Application adaptation plan:

[Zero defect commitment in the supply chain]

Raw material traceability: Phosphate rock is tested by XRF (heavy metals Pb+Cd+As≤8ppm)

Intelligent production:

DCS system controls crystallinity (CV value≤2.5%)

Magnetic foreign matter≤0.5mg/kg (fully automatic iron removal line)

Global delivery:

Bonded warehouse in Rotterdam Port: 5,000 tons of inventory

Anti-caking treatment: Add 0.3% nano-silica

FAQ 1: How does STPP improve detergency in low-temperature (15°C) washing?

Through the dual-effect mechanism of micelle activation and dirt stripping:

Ion chelation: binds Ca²+/Mg²+ (binding energy > 320kJ/mol) to prevent metal ions and surfactant precipitation

Interface activation: reduces the critical micelle concentration (CMC) of LAS from 0.8g/L to 0.5g/L (Wilhelmy plate method)

Stain penetration: reduces the contact angle of oil stains from 112° to 38° (high-speed video analysis)

Empirical data:

When washing in cold water at 10°C, the blood stain removal rate increased from 51% to 87% (EMPA 117 standard cloth)

Surfactant foaming height increased from 12cm to 19cm (Ross-Miles method, 25°C)

FAQ 2: How to balance the performance of STPP and phosphorus-free zeolite?

Four-dimensional comparison and compounding scheme:

Alternative solution: STPP 15% + layered sodium silicate 8% + poly aspartic acid 2% (meet EU EC 648/2004 phosphorus limit standard).

FAQ 3: How can the scale residue problem of STPP used in dishwashers be solved?

Development of STPP-polymer synergistic anti-scaling system:

Crystal form regulation:

Compounded with HEDP (molar ratio 1:0.3), the CaCO₃ crystal form is converted from calcite to vaterite (solubility ↑3.8 times)

Dispersion stability:

Add 0.5% polyacrylic acid (Mw=4500), the suspended particles Zeta potential reaches -41mV

Empirical effect:

The traditional solution’s transmittance is only 89.3% after 100 times, and the scale is 0.38mm.

FAQ 4: What is the compatibility and stability of STPP in laundry detergent?

Formula adaptation technology matrix:

Storage test: 40℃/RH75% accelerated test for 3 months, STPP hydrolysis rate ≤1.8% (ion chromatography).

FAQ 5: How to deal with the controversy over STPP fabric residues?

Ensure safety through the three-level residue control system:

Molecular weight screening:

To prevent oligomers from penetrating the fibre, control the degree of polymerization n=3-5 (accounting for ≥93%).

Rinse optimization:

Compounded with methyl glycine diacetic acid (MGDA), the rinsing efficiency is increased by 40%

Testing guarantee:

Provide a rapid residue test kit (detection limit 0.5mg/kg, 15 minutes to get the result).

FAQ 6: How does STPP reduce metal corrosion in industrial cleaning?

Constructing a three-dimensional corrosion inhibition network:

pH buffering: maintaining the system pH at 9.5-10.5, reducing local acidification

Passivation film formation:

Compounded with sodium molybdate (STPP: MoO₄²⁻=4:1), the corrosion rate of carbon steel is reduced from 3.1g/m²·h to 0.4g/m²·h

Synergistic effect:

Applicable to oilfield pipeline cleaning (NACE TM0169 standard)

FAQ 7: How can STPP wastewater be treated to meet environmental protection requirements?

Phosphorus recovery and resource utilization technology route:

Cost comparison: Compared with traditional chemical precipitation, the resource utilization route reduces sludge disposal costs by 67%.