Polyaspartate scale inhibitors -- Biodegradable alternatives to polyacrylates
- Donlar Corp., Bedford Park, IL (United States)
- Global SOS, Naperville, IL (United States)
Polyaspartates are highly biodegradable alternatives to polyacrylate-based scale inhibitors. This article presents laboratory testing data on polyaspartate inhibitors of calcium and barium mineral scales. The optimum molecular weight (Mw) for polyaspartate inhibitors of calcium carbonate, calcium sulfate, and barium sulfate mineral scales was determined to be between 1,000 Mw and 4,000 Mw. For inhibition of calcium carbonate and barium sulfate, polyaspartates in the range of 3,000 Mw to 4,000 Mw were most effective. For calcium sulfate inhibition, the optimum Mw lies in the 1,000 Mw to 2,000 Mw range. Biodegradability data (OECD 301B Ready Biodegradability) on polyaspartates of a variety of Mw is also presented, which demonstrates the high biodegradability of this class of mineral scale inhibitors.
- OSTI ID:
- 460440
- Journal Information:
- Materials Performance, Vol. 36, Issue 4; Other Information: PBD: Apr 1997
- Country of Publication:
- United States
- Language:
- English
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