Purification of zirconyl sulfate by solvent extraction

MacDonald, D. J. (David J.); Henry, H. G. (Helen G.); Bauer, D. J. (Donald J.)

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Purification of zirconyl sulfate by solvent extraction

1984
By MacDonald, D. J. (David J.) ; Henry, H. G. (Helen G.) ; Bauer, D. J. (Donald J.)
Series: NIOSH Numbered Publications

[PDF-1.47 MB]

English

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Details:

Personal Author:

MacDonald, D. J. (David J.) ; Henry, H. G. (Helen G.) ; Bauer, D. J. (Donald J.)

MacDonald, D. J. (David J.) ; Henry, H. G. (Helen G.) ; Bauer, D. J. (Donald J.) Less -
Corporate Authors:

United States. Bureau of Mines.
Description:

"The Bureau of Mines has conducted bench-scale investigations leading to the design of an integrated process for producing reactor-grade zirconium oxide (zro2) from zircon sand, which avoids the air pollution, water pollution, fire hazard, and odor problems associated with the hexone-thiocyanate process. The integrated process consists of three steps: production of crude zirconyl sulfate solution, solvent extraction, and production of zro2 from strip liquor. This report describes the solvent extraction step. Multistage, countercurrent liquid-liquid extraction with a Tertiary amine in kerosine was used to separate zirconium from a dilute h2so4 solution containing hafnium and other impurities. Process steps described include extraction from an aqueous feed solution to form a hafnium-contaminated, zirconium-bearing organic-phase solution, scrubbing to separate zirconium from coextracted hafnium, stripping to transfer hafnium-free zirconium into an aqueous strip liquor, chloride-loading to produce a chloride-bearing organic solution, scrubbing with the chloride-loaded organic solution to remove traces of uranium impurity from the zirconium-bearing strip liquor, and regeneration to prepare the organic solution for reuse. These steps were performed simultaneously in steady-state, bench-scale experiments. Zirconium recovery of up to 93 pct was achieved. Results of an economic evaluation are included." - NIOSHTIC-2

NIOSH no. 10003305
Subjects:

[+]

Extraction (Chemistry) Zirconyl Sulfate.
Series:

NIOSH Numbered Publications
Subseries:

Report of Investigations
Document Type:

Text
Genre:

Report
Pages in Document:

ii, 29 numbered pages
NIOSHTIC Number:

10003305
Resource Number:

RI 8849
Collection(s):

National Institute for Occupational Safety and Health Stephen B. Thacker CDC Library collection
Main Document Checksum:

[+]

urn:sha-512:87ad54799041935532eb5ba3440312b220173f904a4a92046d676a6c5502da0898cfe98b3eb937e0fec483db9710cf71e750888373fa99f8b7c6dfcedecf4a22
Download URL:

https://stacks.cdc.gov/view/cdc/10650/cdc_10650_DS1.pdf
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Purification of zirconyl sulfate by solvent extraction

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