Dissolvine chelates The right chemistry
Green Chelate Dissolvine Nouryon Akzo
Dissolvine chelating agents combine amine and carboxylic acid chemistry in one molecule. This powerful chemical combination yields aminopolycarboxylates(APCs), which form more stable complexes with metal ions compared to other chelating agents.
In fact, they are the most commonly used chelates, because of their cost effectiveness and versatility. Compared to other less effective chelating agents, the Dissolvine chelates are stable over a wider range of temperatures and pH values, have a stronger affinity for metals and are significantly more efficient. They also have good water solubility and are inert to most chemicals. Moreover, several products in the Dissolvine chelate range are readily biodegradable as measured using the Closed Bottle Test (OECD 301D).
We supply the following Dissolvine chelates: EDTA, GLDA, DTPA, HEDTA, NTA, PDTA, EDG and Glucoheptonate. EDTA is generally the preferred choice, but specific applications may require other chelating agents. Common specific properties of these molecules:
| EDTA | The most widely used, strong, cost effective and general purpose chelating agent. |
| GLDA | The latest, strong and green chelate in our product range. A safe and readily biodegradable chelating agent, that can be used as alternative for NTA, EDTA, phosphates and phosphonates, especially in cleaning applications. It has a high solubility over a wide pH range. The major part of the molecule originates from a natural sustainable source. |
| DTPA | Recommended when a stronger chelating agent is needed, such as during peroxide bleaching of pulp. It remains more effective under oxidizing conditions. It is also especially suitable for descaling in oilfield applications. |
| HEDTA | A chelating agent with similar efficacy to EDTA. Particularly useful when high solubility is needed at low pH and for stabilizing iron ions at high pH. |
| NTA | A readily biodegradable chelating agent that is not as strong as EDTA |
| EDG | A readily biodegradable chelating agent, effective when a relatively weak chelating agent can be used. |
| PDTA | A chelating agent especially developed for the photo-finishing process. It is very effective in the bleaching of photographic films and paper, due to the favorable redox-potentials it imparts to iron. |
| Glucoheptonate | A biodegradable chelating agent based on a carbohydrate. It is generally weaker than the aminopolycarboxylates(APCs) mentioned above. However, it exhibits an exceptional chelating ability for iron and other transition metal ions at high pH. As with GLDA, the major part of the molecule originates from a natural sustainable source. |