Extraction of Tungsten with Trialkylamine- Effect of pH.

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985858%3A_____%2F01%3A27013040" target="_blank" >RIV/67985858:_____/01:27013040 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Extraction of Tungsten with Trialkylamine- Effect of pH.

Original language description

Extraction equilibrium in the system aqueous solution of sodium tungstate-solution of trialkylamine in a mixed diluent was investigated. A tertiary amine with C-7-C-9 straight alkyl chains was dissolved in a mixture of tributyl phosphate and kerosene andpresaturated with sulfuric acid to give normal trialkylamine sulfate. Extraction isotherms at 25 degreesC and at several constant values of equilibrium pH were measured in a broad range of aqueous tungstate concentrations. pH 2.0-6.0 was adjusted by addition of sulfuric acid during equilibration. The equilibrium tungstate and sulfate contents in both phases were determined. A typical tungstate isotherm exhibits a steep ascending part in the low concentration range, corresponding to the region of anionexchange, and a flat part in the high concentration range, where the acid content in the organic phase is virtually exhausted. The level of the flat part decreases with growing pH, corresponding to the increasing number of negative charge

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CI - Industrial chemistry and chemical engineering

OECD FORD branch

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Project

<a href="/en/project/GA104%2F98%2F1440" target="_blank" >GA104/98/1440: Extraction of molybdenum and tungstan by tertiary amines</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2001

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Collection of Czechoslovak Chemical Commmunications

ISSN

0010-0765

e-ISSN

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Volume of the periodical

66

Issue of the periodical within the volume

9

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

13

Pages from-to

1407-1419

UT code for WoS article

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EID of the result in the Scopus database

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