Glossary entry (derived from question below)
Portuguese term or phrase:
desferrificados
English translation:
Deferrization / Deferrized
Portuguese term
Brazil
Portuguese/Spanish - English Translator
Native in: English
Works in: Portuguese to English, Spanish to English
desferrificados
| 4 +2 | Deferrization / Deferrized |
Lara Barnett
|
| 3 +2 | without iron |
Kauê Oliveira
|
| 4 | iron-free argillite / iron-free clay |
Mario Freitas
|
| 3 | iron removal |
ZT-Translations
|
| 3 | missing iron |
Clauwolf
|
Jan 21, 2023 17:06: Lara Barnett Created KOG entry
Proposed translations
United Kingdom
www.lingocraft.co.uk
Native in: English (Variants: British, Scottish, Irish, Singaporean, UK, South African) 
Works in: French to English, Italian to English, Romanian to English, and 2 more.
Deferrization / Deferrized
Removal of iron (as from water for industry)"
https://www.merriam-webster.com/dictionary/deferrization
"Kaolins and clays can be deferrized according to various methods. For high-quality grades of kaolin such as that used in making paper, deferrization is standard practice."
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Note added at 16 hrs (2023-01-13 10:30:34 GMT)
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"Kaolins and clays can be deferrized according to various methods. For high-quality grades of kaolin such as that used in making paper, deferrization is standard practice. Normally, the process consists of magnetic separation and chemical bleaching, possibly in combination with froth flotation. The purpose of this study was to determine the extent to which the quality characteristics of kaolins and clays taken primarily from presently unutilized raw materials can be upgraded to high qualities through appropriate beneficiation processes."
https://www.researchgate.net/publication/293693358_DEFERRIZI...
"DEFERRIZATION of Kaolinic Sand by Iron Oxidizing and Iron Reducing Bacteria"
"Kaolins and clays can be DEFERRIZED according to various methods. For high-quality grades of kaolin such as that used in making paper, DEFERRIZATION is standard practice. "
Brazil
Master in Linguistics (USP)
Native in: Portuguese
Works in: English to Portuguese, Portuguese to English, French to Portuguese, and 1 more.
without iron
Brazil
Trilingual translator and proofreader
Native in: Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Portuguese to English, Japanese to Portuguese, and 3 more.
iron removal
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Note added at 50 mins (2023-01-12 19:11:49 GMT)
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I found another source that uses this term here:
https://cordis.europa.eu/project/id/MA2M0014
I also found the term "deferrification" on wordsense (https://www.wordsense.eu/deferrification/), but I couldn't find enough sources that use this term, so I still consider "iron removal" to be the better choice.
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Note added at 52 mins (2023-01-12 19:14:31 GMT)
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My apologies. Looks like using parenthesis breaks the link, so I'll post it again without the parenthesis:
https://www.wordsense.eu/deferrification/
https://www.lenntech.com/processes/iron-manganese/iron/iron-removal-physical-chemical-way.htm
missing iron
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Note added at 55 mins (2023-01-12 19:16:46 GMT)
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Como adjetivo:
... missing iron mudstones
Brazil
32 years engineering/law/contracts
Native in: English (Variant: US) , Portuguese (Variant: Brazilian)
Works in: English to Portuguese, Portuguese to English
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