Acid sulfation of alunite

Froisland, L. J. (Lawrence J.); Wouden, M. L. (Marinus L.); Harbuck, D. D.

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i

Acid sulfation of alunite

1989
By Froisland, L. J. (Lawrence J.) ; Wouden, M. L. (Marinus L.) ; Harbuck, D. D.
Series: Mining Publications

[PDF-1.03 MB]

English

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Personal Author:

Froisland, L. J. (Lawrence J.) ; Wouden, M. L. (Marinus L.) ; Harbuck, D. D.

Froisland, L. J. (Lawrence J.) ; Wouden, M. L. (Marinus L.) ; Harbuck, D. D. Less -
Corporate Authors:

United States. Bureau of Mines.
Description:

"The U.S. Bureau of Mines conducted laboratory studies on sulfuric acid (h2so4) digestion of alunite [kal3(so4)2(oh)6] as a means for treating domestic deposits of this mineral. Digesting alunite ore in boiling h2so4 at concentrations of 88-wt-pct acid or higher breaks down the alunite and permits a convenient separation of potassium and aluminum. The digestion reaction is a complex sulfation reaction occurring in two stages. In this reaction, the potassium component extracts into the h2so4 for eventual recovery as potassium sulfate (k2so4) in a separate unit operation. Aluminum is left as acid-insoluble aluminum sulfate [al2(so4)3], which can be extracted by a 95 deg. C water leach. Additional purification of al2(so4)3 produced in this study is needed to meet cell-grade alumina (al203) purity specifications. Extraction and separation of potassium and aluminum from the alunite ore were consistently above 90 pct." - NIOSHTIC-2

NIOSHTIC no. 10006814
Subjects:

[+]

Alunite -- Refining. Sulfuric Acids.
Series:

Mining Publications
Subseries:

Report of Investigations
Document Type:

Text
Genre:

Report
CIO:

National Institute for Occupational Safety and Health (NIOSH)
Pages in Document:

ii, 12 numbered pages
NIOSHTIC Number:

10006814
Resource Number:

RI 9222
Collection(s):

National Institute for Occupational Safety and Health
Main Document Checksum:

[+]

urn:sha-512:2c76b6408a10dee8bf50e115e7a17efaf41adc0b6a99dcae68d8ccbc9f35f270ca79592561260a5aface94f08831b6774feaf7d38e51322025515a57274eeced
Download URL:

https://stacks.cdc.gov/view/cdc/10297/cdc_10297_DS1.pdf
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Acid sulfation of alunite

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