Abstract: A process is described for recovering sodium carbonate or other sodium-based chemicals from sodium-bearing streams, including in particular mine water, evaporative pond water and sodium carbonate decahydrate deposits, recycle and purge streams, and other waste streams. In the process sodium bicarbonate-bearing streams are decarbonized to reduce the sodium bicarbonate concentration in a combination with other sodium-bearing streams, resulting in a liquor suitable as feed to a sodium carbonate decahydrate or sodium carbonate monohydrate process. The sodium bicarbonate stream is combined in a mix tank with other sodium carbonate bearing streams where the concentration is adjusted to form a liquor suitable to feed a sodium decahydrate or sodium carbonate monohydrate evaporation/crystallization step. In the process the combination of the various sodium-bearing streams is decarbonized to below 3.

Abstract: A process is described for recovering sodium carbonate or other sodium-based chemicals from sodium-bearing streams, including in particular mine water, evaporative pond water and sodium carbonate decahydrate deposits, recycle and purge streams, and other waste streams. In the process selected sodium bicarbonate-bearing streams are decarbonized to reduce the sodium bicarbonate concentration in a combination with other sodium-bearing streams, resulting in a liquor suitable as feed to a sodium carbonate decahydrate or sodium carbonate monohydrate process. The sodium bicarbonate concentration can be reduced using any number of known processes such as reacting said sodium bicarbonate with a neutralizing agent such as calcium oxide, calcium hydroxide, sodium hydroxide, or other alkali. Sodium bicarbonate can also be stripped using steam or air.

Abstract: A process is described for recovering sodium carbonate or other sodium-based chemicals from sodium-bearing streams, including in particular mine water, evaporative pond water and sodium carbonate decahydrate deposits, recycle and purge streams, and other waste streams. In the process selected sodium bicarbonate-bearing streams are decarbonized to reduce the sodium bicarbonate concentration in a combination with other sodium-bearing streams, resulting in a liquor suitable as feed to a sodium carbonate decahydrate or sodium carbonate monohydrate process. The sodium bicarbonate concentration can be reduced using any number of known processes such as reacting said sodium bicarbonate with a neutralizing agent such as calcium oxide, calcium hydroxide, sodium hydroxide, or other alkali. Sodium bicarbonate can also be stripped using steam or air.

Abstract: An improved hydration method heat avoids clogging for the transfer, solvation, and storage of dry particulate matter for a sealed solvation hopper chamber in combination with a liquid driven eductor and equipped to be connected to a storage container. Specifically, the improvement resides in the steps of reducing the flow of the dry particular matter and flushing the solvating hopper with water automatically at predetermined periodic intervals.

Abstract: An improved hydrator apparatus for the transfer and slurry storage of dry particulate matter comprises a sealed solvation hopper chamber in combination with a liquid driven eductor and equipped to be connected to a storage container as provided. The improvement resides in the provision of a flushing device that functions periodically and automatically in timed intervals, and without the need to shut down the operating hydrator, to remove solids accumulation in the hopper chamber.

Abstract: A flexible closure formed of interlocking segments comprising a plurality of segments which together constitute the closure, each of the segments located between facing recesses of rails to essentially fill the space between rails at the lower extents when in a closed operative orientation and to essentially fill the space between rails at the upper extents when in the inoperative storage orientation, each of the segments having an upper portion with a generally semi-circular cross-sectional configuration over the majority of its extent with the axis of the upper portion extending horizontally between the rails, each of the segments also having a lower portion in the lower part thereof with a recess being of a generally semi-circular configuration over the majority of its extent with its axis parallel with the axis of the upper portion, the upper portion of one segment being received within the recess of the lower portion of the next adjacent segment to thereby allow the flexing of the closure about the axes

Abstract: The present invention comprises an unloading pan for bulk dry particulate matter, such as soda ash. The pan comprises a pan inlet and a pan outlet. The pan is preferably designed wherein the source of particulate matter is a railroad car having a car outlet at the bottom to gravity unload therethrough. There is a means to position, and preferably attach, the pan container at the outlet to the source of particulate matter, i.e., the outlet of the railroad car.

Abstract: The present invention relates to an adapter which is useful to receive dry bulk chemicals with a minimum of dust escaping to the environment and which screens the free flowing dry bulk chemicals.