Inorganic Chemicals Salts CSDS/APSM complex sodium disilicate water
softener powder
Appearance: white granular powder
Description:
Due to the environmental protection problems of STPP, detergent
industry engineers from all over the world are working on finding a
perfect replacement of STPP in detergent system.
Till now many products are developed for this purpose: NTA,
Zeolite, SKS-6 and etc.
CSDS is designed to reach the similar performance with SKS-6.
Application:
1), Replacing STPP to make low phosphor and phosphors-free
detergent powder;
2), Textile and dyeing industry;
3), Stabilizer of hydrogen peroxide;
4), Industrial cleaning auxiliary;
5), Porcelain industry.
Characteristic:
1), Good capability to soften waterl;
2), Good performance in low-temperature water;
3), Environmental friendly;
4), Strong pH buffering ability;
5), Can be used in different processing methods of detergent
powder;
6), Compatible with various surfactants;
7), Compatible with various bleaching agent;
8), Anti-sediment;
Important notice:
1), Comparison of different water softeners:
| STPP | ZEOLITE | APSM | MSD |
| | Synthetic | Natural | (also called PSM,PSMA) | |
| Full name | Sodium Tripolyphosphate | 4A Zeolite | 4A Zeolite | Active Poly Sodium Metasilicate | Modified Sodium Disilicate |
| Appearance | White fine powder | White powder | White fine free flowing powder | White granular |
| Whiteness | 90 min | 95 min | 80 min | 85 min | 90 min |
| Odor | No odor | No odor | No odor | No odor, but irritant to nose and eyes because the powder is too
fine and too light | No odor |
| Bulk density | 650~950 g/L | 550~ 700 | 1100~1300 | 480 ~ 600 g/L | 480 ~ 550 |
| Loading qty | 25~26mt/20fcl | 18mt/20fcl | 27mt/20fcl | 26mt/40HQ | 15~ 16mt/20fcl |
| Main content | Na5P3O10 94% min | Na2O | Na12AL12Si12O48·27H2O | Na2O + SiO2 74% min | Na2O2SiO2 |
| | Al2O3 | | | |
| | SiO2 | | | |
| Ca exchange | N/A | 295 min | N/A | 310 mg/g | 320 mg/g |
| Mg exchange | N/A | 175 min | N/A | 300 mg/g | N/A |
| pH | 9.2 ~10.3 | 11 max | 11.3 max | 11 max | 12.5 max |
| Identical index | P2O5 content | Al3+ content | N/A | Na2O + SiO2 content | SiO2 content |
| Value of identical index | 56.5% min | 18% min | N/A | 74% min | 20% min |
| Water insoluble | 0.1% max | N/A | N/A | 1% max | N/A |
| Moisture | 0.5% max | 22% max loss on 800℃ | 16% max loss on 600℃ | N/A | 5% max |
2), CSDS can not completely replace STPP due to STPP’s features of:
- Enhancing the emulsifying and dispersing power, to increase the
solubility of protein and dust which normally existing in the
fabrics from daily life;
- Anti-caking agent for detergent powder. Since detergent powder is
easily caking in exposed air, STPP can absorb the moisture and
become Hexahydrate, which is dry and free flowing.
3), We normally list 2 years as the shelf life in our COA, the real
shelf life is actually much longer than 2 years if it’s stocked in
good condition (bags are sealed enough, away from direct sun-light,
moisture and other incompatible chemical materials).
