Sodium hypochlorite solutions have attained widespread use in bleaching operations and as disinfectants, both in the home and in industry. Scheele, a Swedish chemist, is generally credited with discovering chlorine in 1774. During his experiments, he found that a solution of chlorine in water possessed definite bleaching properties. Since the reaction between chlorine and water
Other trends include intensification of the hardening process (reaching high strength after 4–6 hours of hardening); efficient location of cement plants in order to reduce shipping operations for raw materials and finished products; a decrease in the prime cost of cement production; achievement of a high level of mechanization and automation ...
Conversion of phosphogypsum to sodium sulfate and calcium carbonate in aqueous solution Y ... The phosphogypsum can substitute natural gypsum in plaster industry, but it is necessary to remove the soluble impurities (phosphate, fluorine, organic matter...) therein. A small amount of these impurities affects the setting time and strength
A predissolved solution of a dispersant and modifier is prepared in water to form a solution prior to the addition of the stucco. After mixing the solution, the stucco is added to form the slurry. Optionally, the slurry is then shaped into a product and allowed to set. In a method of making a gypsum slurry, a polycarboxylate dispersant, a modifier