Investigation of the Making of High-Modulus Sodium Silicate from Sulfate Batch Without Using a Reducer

2014 ◽  
Vol 71 (7-8) ◽  
pp. 233-235 ◽  
Author(s):  
A. A. Egorov ◽  
B. A. Sokolov ◽  
A. A. Shimkin
Keyword(s):  
Sodium Silicate ◽  
High Modulus

A New Method of Producing High Purity 4A-Molecular Sieve from High Modulus Sodium Silicate Liquor Purified by Carbonization

2010 ◽  
Vol 105-106 ◽  
pp. 736-738 ◽  
Author(s):  
Guang Hui Bai ◽  
Peng Xu ◽  
Wei Teng ◽  
Xiang Gang Wang
Keyword(s):  
Carbon Dioxide ◽  
Sodium Silicate ◽  
High Purity ◽  
Molecular Sieve ◽  
Calcium Absorption ◽  
Ph Value ◽  
Coal Fly Ash ◽  
Sodium Aluminate ◽  
Absorption Capacity ◽  
High Modulus

A new technology for producing high purity 4A-molecular sieve was developed with high modulus sodium silicate liquor and sodium aluminate liquor extracted from coal fly ash as starting materials. The sodium silicate liquor extract was purified by precipitating ferrous, titanium, and other impurities by carbon dioxide injection. Concentration of carbon dioxide in the extract was maintained at 48%, and the pH value of the extract controlled in the range of 11 and 11.2. After that, the purified sodium silicate liquor was mixed with sodium aluminate liquor in the ratios of SiO2/Al2O3=2.0, Na2O/SiO2=1.6 and H2O/Na2O=60. The mixture was then heated to 90°C and kept for 2 h. A high purity 4A-molecular sieve product was obtained after washing and drying the crystals obtained from the reaction mixture. The molecular sieve product has a purity of 99% and aperture of 0.4nm. Its calcium absorption capacity is about 290mg/g. The product was also characterized by SEM, BET, XRD and IR analysis.

Study on the Properties of Magnetization Modified Sodium Silicate Sand

2011 ◽  
Vol 291-294 ◽  
pp. 645-651 ◽  
Author(s):  
You Fa Fan ◽  
Dong Nan Li
Keyword(s):  
Magnetic Field ◽  
Sodium Silicate ◽  
Good Effect ◽  
High Modulus ◽  
Technological Parameters ◽  
Low Modulus ◽  
The Magnetic Field

Based on the magnetization technological parameters optimized of sodium silicate, the properties of modified sodium silicate sand with ester hardening have been systematically investigated. The results indicated that the bonded strength of sodium silicate treated in the magnetic field may be increased by 30%~40%, the minimum addition content of sodium silicate in mold sand may reduce to 2.5%, and thus it improves markedly the collapsibility of the sodium silicate bonded sand. The used time of modified sodium silicate sand increases to 25%, but the effect of magnetization of sodium silicate will be disappeared after 24 hours, and the magnetization decaying speed enhanced with increasing the modulus of sodium silicate. The magnetization modification has a good effect on the high modulus sodium silicate than the low modulus sodium silicate.

scholarly journals Thermodynamic Analysis of the Reaction of High Modulus Sodium Silicate

2020 ◽  
Vol 6 (1) ◽  
pp. 14-20
Author(s):  
G. Baimuratova ◽  
G. Omurbekova
Keyword(s):  
Sodium Silicate ◽  
Thermodynamic Analysis ◽  
Second Law Of Thermodynamics ◽  
Thermodynamic Method ◽  
Second Law ◽  
High Modulus ◽  
Tabular Data ◽  
Gibbs Equation ◽  
Isothermal Reaction ◽  
Reaction Potential

The thermodynamic method is based on the study and analysis of the formation of high-modulus sodium silicate. It is determined by the thermodynamic method of the isobaric-isothermal reaction potential using the equation of the second law of thermodynamics, the Kirchhoff law and the Gibbs equation. To conduct a thermodynamic analysis for all in the reaction of the compounds, the necessary tabular data were used, and a thermodynamic analysis was performed for four chemical reactions. Equations of changes in the isobaric-isothermal potential as a function of temperature are compiled for all reactions. Based on the results obtained, it was concluded that the first reaction is practically the most acceptable for the production of silicate energy.

EXELFS Studies of Carbon Fibers

1990 ◽  
Vol 48 (2) ◽  
pp. 72-73
Author(s):  
V. Serin ◽  
K. Hssein ◽  
G. Zanchi ◽  
J. Sévely
Keyword(s):  
Carbon Fibers ◽  
Energy Analysis ◽  
Electron Excitation ◽  
Complex Structures ◽  
High Modulus ◽  
Promising Technique ◽  
X Ray ◽  
Fine Structures ◽  
X Ray Absorption

The present developments of electron energy analysis in the microscopes by E.E.L.S. allow an accurate recording of the spectra and of their different complex structures associated with the inner shell electron excitation by the incident electrons (1). Among these structures, the Extended Energy Loss Fine Structures (EXELFS) are of particular interest. They are equivalent to the well known EXAFS oscillations in X-ray absorption spectroscopy. Due to the EELS characteristic, the Fourier analysis of EXELFS oscillations appears as a promising technique for the characterization of composite materials, the major constituents of which are low Z elements. Using EXELFS, we have developed a microstructural study of carbon fibers. This analysis concerns the carbon K edge, which appears in the spectra at 285 eV. The purpose of the paper is to compare the local short range order, determined by this way in the case of Courtauld HTS and P100 ex-polyacrylonitrile carbon fibers, which are high tensile strength (HTS) and high modulus (HM) fibers respectively.

Autonomous self-healing polyisoprene elastomers with high modulus and good toughness based on the synergy of dynamic ionic crosslinks and highly disordered crystals

2020 ◽  
Vol 11 (41) ◽  
pp. 6549-6558
Author(s):  
Yohei Miwa ◽  
Mayu Yamada ◽  
Yu Shinke ◽  
Shoichi Kutsumizu
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Self Healing ◽  
High Modulus ◽  
Disordered Crystals ◽  
Ionic Crosslinks

We designed a novel polyisoprene elastomer with high mechanical properties and autonomous self-healing capability at room temperature facilitated by the coexistence of dynamic ionic crosslinks and crystalline components that slowly reassembled.

Study on the Chemical Modification Process of Jute Fiber

TAPPI Journal ◽  
2010 ◽  
Vol 9 (2) ◽  
pp. 23-29 ◽  
Author(s):  
Wei-ming Wang ◽  
Zai-sheng Cai ◽  
Jian-yong Yu
Keyword(s):  
Sodium Hydroxide ◽  
Sodium Silicate ◽  
Treatment Time ◽  
Jute Fiber ◽  
Process Conditions ◽  
Silicate Concentration ◽  
Sodium Hydroxide Concentration ◽  
Liquor Ratio ◽  
Degumming Process ◽  
Selection Of

Degumming of pre-chlorite treated jute fiber was studied in this paper. The effects of sodium hydroxide concentration, treatment time, temperature, sodium silicate concentration, fiber-to-liquor ratio, penetrating agent TF-107B concentration, and degumming agent TF-125A concentration were the process conditions examined. With respect to gum decomposition, fineness and mechanical properties, sodium hydroxide concentration, sodium silicate concentration, and treatment time were found to be the most important parameters. An orthogonal L9(34) experiment designed to optimize the conditions for degumming resulted in the selection of the following procedure: sodium hydroxide of 12g/L, sodium silicate of 3g/L, TF-107B of 2g/L, TF-125A of 2g/L, treatment time of 105 min, temperature of 100°C and fiber to liquor ratio of 1:20. The effect of the above degumming process on the removal of impurities was also examined and the results showed that degumming was an effective method for removing impurities, especially hemicellulose.

Sodium silicate-based composition used for water control in producing wells

2020 ◽  
pp. 82-84
Author(s):  
I.G. Fattakhov ◽  
◽  
A.S. Zhirkeev ◽  
A.K. Sakhapova ◽  
R.R. Stepanova ◽  
...  
Keyword(s):  
Sodium Silicate ◽  
Water Control
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