ChemInform Abstract: A Two-Dimensional 29Si NMR Spectroscopic Study of the Structure of the Silicate Anions Present in an Aqueous Potassium Silicate Solution.

ChemInform ◽  
1988 ◽  
Vol 19 (36) ◽  
Author(s):  
C. T. G. KNIGHT
Keyword(s):  
Spectroscopic Study ◽  
Silicate Solution ◽  
Potassium Silicate ◽  
29Si Nmr ◽  
Two Dimensional ◽  
Potassium Silicate Solution

Activating effect of potassium silicate solution in low portland cement binder

2022 ◽  
Vol 319 ◽  
pp. 126091
Author(s):  
Linlin Zhao ◽  
Xianwei Ma ◽  
Shuaiqi Song ◽  
Peibo You ◽  
Hairong Wu
Keyword(s):  
Portland Cement ◽  
Silicate Solution ◽  
Potassium Silicate ◽  
Potassium Silicate Solution ◽  
Cement Binder

Synthesis of Silica-Potassium-Nitrogen from Carbamide and Potassium Silicate by CO2 Precipitator

2019 ◽  
Vol 966 ◽  
pp. 77-82
Author(s):  
Ketut Sumada ◽  
Srie Muljani ◽  
Caecilia Pujiastuti
Keyword(s):  
Ir Spectra ◽  
Potassium Hydroxide ◽  
Potassium Hydroxide Solution ◽  
Silicate Solution ◽  
Potassium Silicate ◽  
Precipitation Method ◽  
Precipitation Process ◽  
X Ray ◽  
Hydroxide Solution ◽  
Potassium Silicate Solution

Potassium silicate is well known as a fertilizer and source of silica for plants growth. This study aims to infiltrate nitrogen from carbamide (urea) into potassium silicate solution to produced silica potassium nitrogen (Si-K-N) matrix by precipitation method using CO2 as precipitator. Potassium silicate in the range of 3-8% SiO2 was obtained by extracting silica from geothermal sludge using potassium hydroxide solution. Carbamide is added to the potassium silicate solution allowed by mixing and flowing of CO2 gas in reactor glass. The result of IR spectra indicated the presence of N-H groups, potassium and silica in the gel matrix produced from precipitation process while no N-H group appears in the gel matrix produced from precipitation in the absence of carbamide. X-ray fluorescence showed the composition of the product Si-K-N in the range of 40 to 50 %SiO2 and in the range of 50 to 60 %K2O.

Neurochemistry of late-life major depression: A pilot two-dimensional MR spectroscopic study

2004 ◽  
Vol 20 (6) ◽  
pp. 1039-1045 ◽  
Author(s):  
Nader Binesh ◽  
Anand Kumar ◽  
Sun Hwang ◽  
Jim Mintz ◽  
M. Albert Thomas
Keyword(s):  
Major Depression ◽  
Spectroscopic Study ◽  
Late Life ◽  
Two Dimensional
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