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US 5,308,600 AGranted
Process for conditioning waste sulfuric acid
AssigneeHoechst Aktiengesellschaft
InventorsHelmold von Plessen, Wolfram Fritsche-Lang, Horst Lorke
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Abstract
Process for conditioning waste sulfuric acid which is prone to precipitation of tars or resins, which comprises adding emulsifiers, preferably long-chain polyethers, to the waste sulfuric acid.
Claims19
A process for conditioning waste sulfuric acid, which is prone to precipitation of tars or resins, which comprises adding a polyether as an emulsifier to the waste sulfuric acid.
A process for conditioning waste sulfuric acid, comprising:
- adding, to a waste sulfuric acid containing 5 to 80% by weight H.sub.2 SO.sub.4, water, and tars or resins prone to precipitation, a tar- or resin-emulsifying amount of a polyether having one or a plurality of oxyalkylene chains, each oxylkylene chain having a plurality of repeating ether units, the total number of ether units in said polyether ranging from 4 to 50, said emulsifying amount being sufficient to prevent precipitation of tars or resins for a period of transportation or storage of at least one day.
Dependencies are inferred from the claim text.