evaporation of great salt lakes in Wyoming. Trona also comes from Kenya, Egypt, Venezuela and the deserts of Central Asia. After it’s mined, it’s heated to make soda ash, which is then dissolved in water. When carbon dioxidebubbles under pressurethrough the solution, sodium bicarbonate is...
US5925296 * Jan 8, 1997 Jul 20, 1999 Leese; Wilbert E. Manufacture of structural members from solid wasteUS5925296 1997年1月8日 1999年7月20日 Leese; Wilbert E. Comminuting solid wastes, adding fly ash or baking soda, heating, adding polyurethane, compressing, extruding...
An improved process in the production of sugar is provided by adding to a sugar solution prior to crystallization calcium acid phosphate, followed by the addition of soda ash. Optionally, in a third step sodium hydrosulfite is added. The resulting sugar is of a high grade, being light colored...
domestic waste, consists of mixing the ash with soda lime (NaOH) and then adding it to hot water at over 80 deg.C to which a cpd. incorporating an -NO3 radical has been added. The ash, which might contain metals in a sol. form, can be first washed to remove any water sol. pro...