METHOD OF REFINING USED GREASE
OILS
The proposed method is similar to those commonly employed,
since it uses an extraction agent to process the raw material, but the
composition of the extraction agent is different. It is a mixture of mineral and
organic acids with the weight correlation (mineral-to-organic) from 1:0.01 to
1:1. The volumes of the extracting agent and the processed material are mixed
correspondingly within the range of 1:0.5 to 1:60.
The orthophosphoric acid concentrations from 5 to 100 mass
percent are normally used as a mineral component of the mixture. Organic
components may be formic acid, acetic acid, propionic acid or acrylic acid.
Dmitriyeva Z.T. and others
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