bleaching earth
- noun
- Specialized
:
tierra blanqueadora
- The refinery used bleaching earth to purify vegetable oil for commercial sale.
Examples
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After treatment with bleaching earth, the crude oil became significantly lighter in color.
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Suppliers recommended different grades of bleaching earth to achieve optimal results in the filtration process.
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The factory uses bleaching earth to refine the oil.
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Many bleaching earths are available on the market today.
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After treatment with bleaching earth, the crude oil became significantly lighter in color.
-
The refinery used bleaching earth to purify vegetable oil for commercial sale.
-
Suppliers recommended different grades of bleaching earth to achieve optimal results in the filtration process.
Synonyms
A clay that removes colour from vegetable oil to make it clear
A fine clay that soaks up oil and grease to clean surfaces or cloth
How Adsorbent
- Specialized
1
4.1
- Specialized
- Specialized
171
1.0
Surface Forms
Morphology
The noun phrase denotes 'earth (soil) used for bleaching', which is directly and transparently built from 'bleach' (to remove color) + 'earth' (soil); 'bleaching' here is a participial modifier meaning 'used for bleaching'. Despite being a technical term, the compositional modifier + noun pattern is regular and a B1 learner who knows the constituents can infer the meaning.
Etymology
Bleaching earth comes from the simple idea of bleaching, meaning 'making lighter', and earth, meaning 'clay'. This fine clay soaks up color and dirt from oils, so the name means the material used 'to remove color and impurities'.