scholarly journals Thermodynamic Modeling of Calcium Sulfate Hydrates in a CaSO4–H2SO4–H2O System from 273.15 to 473.15 K up to 5 m Sulfuric Acid

2020 ◽  
Vol 65 (5) ◽  
pp. 2310-2324
Author(s):  
Leiting Shen ◽  
Hannu Sippola ◽  
Xiaobin Li ◽  
Daniel Lindberg ◽  
Pekka Taskinen
Keyword(s):  
Sulfuric Acid ◽  
Thermodynamic Modeling ◽  
Calcium Sulfate

scholarly journals Thermodynamic Modeling of Calcium Sulfate Hydrates in the CaSO4–H2O System from 273.15 to 473.15 K with Extension to 548.15 K

2019 ◽  
Vol 64 (6) ◽  
pp. 2697-2709 ◽  
Author(s):  
Leiting Shen ◽  
Hannu Sippola ◽  
Xiaobin Li ◽  
Daniel Lindberg ◽  
Pekka Taskinen
Keyword(s):  
Thermodynamic Modeling ◽  
Calcium Sulfate

Thermodynamic modeling and experimental measurement of calcium sulfate in complex aqueous solutions

2010 ◽  
Vol 290 (1-2) ◽  
pp. 88-94 ◽  
Author(s):  
G. Azimi ◽  
V.G. Papangelakis
Keyword(s):  
Aqueous Solutions ◽  
Thermodynamic Modeling ◽  
Experimental Measurement ◽  
Calcium Sulfate

Thermodynamic Modeling of the Sulfuric Acid−Water−Sulfur Trioxide System with the Symmetric Electrolyte NRTL Model

2011 ◽  
Vol 56 (4) ◽  
pp. 963-977 ◽  
Author(s):  
Huiling Que ◽  
Yuhua Song ◽  
Chau-Chyun Chen
Keyword(s):  
Sulfuric Acid ◽  
Thermodynamic Modeling ◽  
Sulfur Trioxide ◽  
Acid Water ◽  
Nrtl Model ◽  
Electrolyte Nrtl

scholarly journals Reaction Kinetics The Formation of Calcium Sulfate From Cow Bone And Sulfuric Acid In Batch

2020 ◽  
Vol 1569 ◽  
pp. 042053
Author(s):  
C Pujiastuti ◽  
Y Ngatilah ◽  
M Septianto ◽  
A Tantyono
Keyword(s):  
Sulfuric Acid ◽  
Reaction Kinetics ◽  
Calcium Sulfate ◽  
Cow Bone

Scale inhibitor and recovery optimization for a brackish water supply: pilot test results and full-scale experiences

2003 ◽  
Vol 3 (5-6) ◽  
pp. 139-145 ◽  
Author(s):  
S. Duranceau ◽  
W.A. Lovins ◽  
J.V. Foster ◽  
D. Taylor ◽  
J. Morton ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Reverse Osmosis ◽  
Brackish Water ◽  
Calcium Sulfate ◽  
Treatment Plant ◽  
Full Scale ◽  
Feed Water ◽  
Test Results ◽  
Scale Inhibitor ◽  
Acid Addition

Pilot testing was conducted at a brackish water reverse osmosis water treatment plant to identify operational constraints associated with effective scaling control. The test program involved testing select inhibitors/dispersants, feed water pH, and operating recovery as part of a full-scale retrofit from a hollow fiber to spiral-wound reverse osmosis membrane facility. The test results indicated the facility could be operated at elevated recovery, but was sensitive to conditioning with sulfuric acid. Use of sulfuric acid addition to control calcium carbonate scaling was determined to increase calcium sulfate scaling. Membrane autopsy data confirmed calcium sulfate scaling onto the membrane surface with minimal biological and organic content. It was determined that recovery could be increased from 65 to 75 percent by discontinuing sulfuric acid addition and feeding only scale inhibitor. Scale inhibitors with dispersant properties were recommended for full-scale implementation.

Preparation of Calcium Sulfate Hemihydrate Using Stainless Steel Refinery Sludge and Waste Sulfuric Acid

2001 ◽  
Vol 4 (3) ◽  
pp. 71-76
Author(s):  
Ji Whan Ahn ◽  
Hee Tai Eun ◽  
Hyung Seok Kim ◽  
Jang Su Kim ◽  
Ghee Woong Sung
Keyword(s):  
Stainless Steel ◽  
Sulfuric Acid ◽  
Calcium Sulfate ◽  
Calcium Sulfate Hemihydrate

Study on Preparation of Calcium Sulfate Whisker with Leaching Tailings of Nickel Ore

2011 ◽  
Vol 287-290 ◽  
pp. 2084-2087 ◽  
Author(s):  
Li Wang ◽  
Chun Yan Zhuang ◽  
De Qin Meng
Keyword(s):  
Sulfuric Acid ◽  
Calcium Sulfate ◽  
Preparation Method ◽  
Orthogonal Experiment ◽  
Raw Material ◽  
High Grade ◽  
Reaction Conditions ◽  
Acid Reaction ◽  
Calcium Sulfate Whiskers ◽  
Calcium Sulfate Whisker

Taking leaching tailings of the nickel ore as raw material, calcium sulfate whiskers were prepared. The effects of Mg/Ca mole ratio, concentration of sulfuric acid, reaction temperature and precipitating time on the recovery of calcium were studied in this paper. The preparation method and reaction conditions of fibrous calcium sulfate whisker have been optimized by an orthogonal experiment, in order to obtain a high grade whisker product which could meet industrial requirements on whiteness and size.

Preparation of α-Calcium Sulfate Hemihydrate by Reaction of Sulfuric Acid with Lime

2005 ◽  
Vol 44 (4) ◽  
pp. 715-724 ◽  
Author(s):  
Yuanbing Ling ◽  
George P. Demopoulos
Keyword(s):  
Sulfuric Acid ◽  
Calcium Sulfate ◽  
Calcium Sulfate Hemihydrate
Sign in / Sign up

Export Citation Format

Share Document