Patent US5275794 - Process for producing sodium bicarbonate from .Jan 4, 1994 . Production of sodium bicarbonate from natural soda deposits that may occur as natural . The process of claim 1, wherein the solid soda deposits are ... allow for a relatively long retention time of two to four hours in the crystallizer 20. ... Combined process for preparing calcined soda by applying surface.hous combined process for soda production,Hous Process for producing Sodium Carbonate - International .Hou's process uses carbon monoxide (CO) to produce the required carbon dioxide . "This pressure filter helps soda-ash producers deal with waste sludge.
hous combined process for soda production