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US 5,492,631 AGranted
Process for dewatering fine-particle solids suspensions using dialkyl carbonates
AssigneeHenkel Kommnaditgesellschaft auf Aktien
InventorsRita Koester, Alfred Westfechtel, Walter Knoerr
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Abstract
Fine-particle solids suspensions can be dewatered by a process in which dialkyl carbonates corresponding to formula (I) ##STR1## in which R.sup.1 and R.sup.2 independently of one another represent alkyl and/or alkenyl groups containing 1 to 22 carbon atoms and m and n independently of one another stand for 0 or numbers of 1 to 10, are used as auxiliaries. The auxiliaries are readily biodegradable, extremely low-foaming and are distinguished by a low solidification point.
Claims20
A process for dewatering a fine-particle solids suspension which comprises:
- adding to the suspension from 10 to 500 grams, per metric ton of solids, of a dialkyl carbonate of the formula ##STR4## in which R.sup.1 and R.sup.2, independently of one another, represent an alkyl or alkenyl group containing 1 to 22 carbon atoms and
- m and n, independently of one another, stand for 0 or a number of 1 to 10.
Dependencies are inferred from the claim text.