A system for the regeneratlon of caustic soda solutlons used In etching aluminum Invokes the hydrolysis of sodium aluminate to llberate free sodium hydroxide and produce a dry, crystalllne hydrated alumlna byproduct. The system has been used extenslvely In Japan, and, by adjusting process parameters, can be adapted to North American practice. By otlllting the system in a typical plant, soild ai...

As a means of decontaminating instruments possibly exposed to Creutzfeldt-Jakob disease, the World Health Organization has recommended immersion and autoclaving in sodium hydroxide. However, this recommendation has raised concerns of possible damage to autoclaves, and hazards to operators as a result of the caustic vapors. A series of experiments has been conducted that demonstrate that there a...

We have established a simple method for assaying the quantity of soluble bromine in the discharge tubes of an extra-high-pressure mercury discharge lamp. Each discharge tube is destroyed in 5 ml of 10 mM sodium hydroxide, and the recovered sodium hydroxide solution is analyzed by suppressed-ion chromatography using gradient elution. We have clarified that this method can assay less than 1 micro...

Abstract A series of alkali metal salts dithiocarbamate‐substituted carboxylate (DTCC) anions were prepared by reaction the parent amino acids with carbon disulfide and an hydroxide. The target compounds, which isolated in anhydrous form or as hydrates, extensively characterized elemental analyses, IR NMR spectroscopy, thermal cyclic voltammetry, single‐crystal X‐ray diffraction. compounds are ...

Although the literature contains a number of reports regarding the bactericidal efficiency of certain specified concentrations of sodium hydroxide against various test organisms, very little of this information is presented in a manner suitable for mathematical analysis. To obtain the data required for analysis, an experimental study was made of the bactericidal efficiency of sodium hydroxide. ...

We have performed and visualized chemical garden growth experiments directly in situ an environmental scanning electron microscope. The microscope chamber simulates the surface of Mars. demonstrate that gardens can form under conditions temperature pressure existing on Mars presence liquid water, silicates, metal salts. Using from aluminum salts, tubes were formed where external is principally ...

Organic compounds containing thiourea function find many industrial, agricultural, pharmaceutical and analytical applications. Consequently, convenient, reliable, rugged and cost-effective methods for ensuring the quality of commercial products based on it are highly desirable. The case with which hydrogen peroxide in the presence of an excess of sodium hydroxide oxdatively desulphurise the thi...

background: several adjuvants have been evaluated for vaccine formulations but alu-minum salts will continue to be used for many years due to their safety, low cost and adjuvanticity with different antigens. two commonly used aluminum adjuvants, alumi-num hydroxide and aluminum phosphate have different adjuvanticity properties. com-mercial recombinant protein hepatitis b vaccines containing alu...

This study is focused on investigating the influence of the parameters for dechlorination of polychlorinated biphenyls (PCB) using electron beam. The dechlorination process was studied using concentrated solutions of polychlorinated biphenyls. 2-propanol with/without water, ethanol, 1,2,3,4-tetrahydronaphthalin and tetrahydrofurane were used as solvents. The results of the research showed that ...