Main Title |
Rate of Crystallization of Calcium Sulfate in Sulfite Liquor in the Presence of Seeding (Skorost Kristallizatsii Sulfata Kaltsiya v Sulfitnom Shcheloke v Prisutstvii Zatravki). |
Author |
Sibirtsev, Yu. A. ;
Sapotnitskii., S. A. ;
|
CORP Author |
Environmental Protection Agency, Research Triangle Park, N.C. Translation Services Section. |
Year Published |
1970 |
Report Number |
EPA-TR-76-115; |
Stock Number |
PB-254 556-T |
Additional Subjects |
Crystallization ;
Calcium sulfates ;
Solutions ;
Supersaturation ;
Translations ;
USSR ;
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB-254 556-T |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
7p |
Abstract |
Sulfite liquor, obtained during boiling with acid and containing not only a calcium, but also a mixed calcium-sodium base, after preliminary concentration by evaporation is a supersaturated solution of calcium sulfate. Independently of the degree of replacement of the calcium ion with a sodium ion in boiling acid during the two-step method used in industry involving the neutralization of the liquor by milk of lime and ammonia, the solubility curve of calcium sulfate passes through a minimum corresponding to a pH value of 3.5 for the liquor. Upon introduction of a seeding of gypsum crystal into the calcium sulfite liquor, the supersaturation of the solution may be decreased to a significant degree. The effect of the indicated parameters on the rate of crystallization of calcium sulfate was investigated for sulfite liquors of the Kotlasskiy (calcium base) and the Solikamskiy (calcium-sodium base) cellulose-paper combines. |
Supplementary Notes |
Trans. of Gidroliznaya i Lesokhimicheskaya Promyshlennost (USSR) v23 n5 p3-4 1970. |
Title Annotations |
+++The Rate of Crystallization of Calcium Sulfate in Sulfite Liquor in the Presence of Seeding (Skorost Kristallizatsii Sulfata Kaltsiya v Sulfitnom Shcheloke v Prisutstvii Zatravki)--Translation. |
PUB Date Free Form |
1970 |
Category Codes |
07D; 20B |
NTIS Prices |
PC A02/MF A01 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
326621115 |
Origin |
NTIS |
Type |
CAT |