
Potassium Formate (For Carbon Black)
Potassium Formate (HCOOK) is increasingly used in the carbon black industry
as a versatile additive and processing aid. Its unique chemical properties,
such as high solubility, reducing ability, and eco-friendly profile, make it
an efficient alternative to traditional inorganic salts and harsh
chemicals.
Role in Carbon Black Production
Carbon black is produced by the incomplete combustion or thermal
decomposition of hydrocarbons. During manufacturing, additives like
potassium formate improve reaction efficiency, enhance product quality, and
provide process stability.
In carbon black production, especially in specialty carbon blacks and
high-quality carbon blacks, structural inhibitors play a pivotal role.
Before the 1990s, sodium hydroxide was generally used as a structural
inhibitor; with the development of special carbon black, it was gradually
replaced by potassium carbonate; however, due to the low solubility of
potassium carbonate, it is easy to layer after dissolution (the upper and
lower concentrations in the solution tank Non-uniformity), which leads to
easy clogging of the nozzle and unstable quality of carbon black. Since
2004, we have cooperated with a multinational carbon black company in the
United States to replace potassium carbonate with potassium formate for
experimental production of carbon black.
The effect is very good. Through nearly ten years of promotion, potassium formate has become the mainstream of structural inhibitors in carbon black production. At the same time, the ash content in carbon black production is also a very important indicator. Therefore, in order to ensure that the ash content in carbon black meets the standard, certain requirements are also set for the toxic and harmful substances in potassium formate.
At present, the quality standards accepted by most carbon black manufacturers are as follows:
Specification and model index name | Solid (Ⅰ) | Liquid (Ⅱ) | Liquid (Ⅲ) |
---|---|---|---|
Appearance | Pure white crystal | Colorless and transparent | Colorless and transparent |
Assay of potassium formate content | 97% MIN/td | 75% MIN | 65% MIN |
Potassium chloride content (as chlorine) Chloride content | 0.01% MAX | 0.01% MAX | 0.01% MAX |
Potassium carbonate content (calculated as carbonate) CO 3 2- content | 0.5% MAX | 0.5% MAX | 0.5% MAX |
Potassium hydroxide content (calculated as hydroxide radical) OH - content | 0.5% MAX | 0.2% MAX | 0.2% MAX |
PH value (25℃) PH value | 9-11 (10% Solution) | 9-11 | 9-11 |
Specific gravity (20℃) Density SG | --- | 1.57 | 1.47 |
Total Iron content | 10ppm max | 10ppm max | 10ppm max |
Calcium content | 10ppm max | 10ppm max | 10ppm max |
Magnesium content | 10ppm max | 10ppm max | 10ppm max |
Turbidity (25℃; NTU) Turbidity | --- | 10NTU | 10NTU |
Sodium content | 0.3% MAX | 0.3% MAX | 0.3% MAX |
Sodium content | 1ppm max | 1ppm max | 1ppm max |