Patent application number | Description | Published |
20130156662 | Process for producing sodium bicarbonate - A process for producing sodium bicarbonate from a sodium carbonate bearing stream (A) comprising at least 2% sodium chloride and/or sodium sulfate by weight, a part of such stream (A) being generated by a sodium carbonate crystallizer, comprising: a) mixing the stream (A) with part of a stream (B) to produce a stream (C); b) bicarbonating the stream (C) with a gas (D) comprising CO | 06-20-2013 |
20130156663 | Process for producing sodium bicarbonate - A process for producing sodium bicarbonate from a sodium carbonate bearing stream (A) comprising sodium carbonate and an alkaline metal salt impurity at a concentration C | 06-20-2013 |
20130171048 | Solution mining of ore containing sodium carbonate and bicarbonate - A solution mining method for recovering alkali values from a cavity of an underground ore formation comprising trona and/or wegscheiderite; a manufacturing process using such method to make sodium-based product(s); and a sodium-based product obtained therefrom. The method comprises: an ore dissolution phase (a) in which the incongruent double-salt in trona and/or wegscheiderite is dissolved from an ore face in a first solvent, and a cavity cleaning phase (b) in which sodium bicarbonate deposited on the ore face during the dissolution phase (a) is dissolved into a second aqueous solvent having a higher pH, hydroxide content, and/or temperature and is partly or completely converted in situ to sodium carbonate. The method further comprises withdrawing a liquor resulting from either phase to the ground surface, optionally recycling some liquor to the cavity; and passing some liquor through a crystallizer, a reactor, and/or an electrodialyser, to form at least one sodium-based product which is recovered. | 07-04-2013 |
20140174673 | Method for increasing evaporation rate of an evaporative pond - A method for increasing the evaporation rate of an evaporative pond containing pond liquor comprising water and at least 1% by weight of sodium carbonate, said evaporative pond being in contact with an ambient air at an ambient air temperature of more than 0° C., the method comprising the following steps: feeding part of the pond liquor to a heat exchanger; heating the pond liquor in the heat exchanger with heat and producing a heated pond liquor; feeding the heated pond liquor into a spraying device at an operating temperature of at least 10° C. above the ambient air temperature; and spraying the heated pond liquor into an open area of the evaporative pond with the spraying device, so as to evaporate at least part of the water of the pond liquor when sprayed. | 06-26-2014 |
20140178288 | Method for increasing evaporation rate of an evaporative pond using solar energy - A method for increasing the evaporation rate of an evaporative pond comprising a pond liquor comprising water and at least 1% by weight of sodium carbonate, said evaporative pond being in contact with an ambient air at an ambient air temperature of more than 0° C., the method comprising the following steps: feeding part of the pond liquor to a heat exchanger; heating the pond liquor in the heat exchanger with heat and producing a heated pond liquor; feeding the heated pond liquor into a spraying device at a temperature called hereafter ‘operating temperature’ of at least 10° C. above the ambient air temperature; and spraying the heated pond liquor into an open area of the evaporative pond with the spraying device, so as to evaporate at least part of the water of the pond liquor when sprayed. | 06-26-2014 |