摘要:
A method of producing soda ash and ammonium sulphate by recycling by-products of Merseberg and Solvay processes includes treating brine with soda ash distiller waste for desulphatation of the brine to obtain gypsum, recovering pure salt from the desulphated brine and utilizing it in manufacture of soda ash in a Solvay process, washing the gypsum and reacting it with liquor ammonia and carbon dioxide to obtain CaCO3 and ammonium sulphate, separating the CaCO3 from the ammonium sulphate solution and recovering solid ammonium sulphate, washing the CaCO3 followed by calcination to generate CO2 and lime, recycling the CO2 in the Solvay process to obtain soda ash, recycling the lime with ammonium chloride generated in the Solvay process to recover ammonia and obtain distiller waste containing CaCl2 as a by-product, recycling the by-product distiller waste for the desulphatation of the brine, and recycling the ammonia recovered.
摘要:
Methods and apparatuses for converting carbon dioxide and treating waste material using a high energy electron beam are disclosed. For example, carbon dioxide and an aqueous reaction solution having a reactant can be combined to form an aqueous reaction mixture, and the aqueous reaction mixture can then be subjected to a high energy electron beam that initiates a reaction between carbon dioxide and the reactant to form a reaction product. Solid or liquid waste material can be treated by, for example, combining carbon dioxide and a solid or liquid waste material having a reactant and then subjecting the carbon dioxide and solid or liquid waste material having a reactant to a high energy electron beam to initiate a reaction between the carbon dioxide and the reactant to form a reaction product.
摘要:
Highly purified alkali metal hydroxide and carbonate solutions are obtained by treating self-contaminated solutions thereof with composite ion exchange resin bodies having low residual amounts of quaternary ammonium cation not intimately associated with carboxylate anions to minimize inorganic chloride and chlorate anion leakage.
摘要:
A plate heat exchanger generally for media liberating a gaseous agent from a liquid heat-transfer medium during heat-exchanging process characterized in that stacks of heat-exchanging plates are placed inside a housing, the interior of this housing being in communication with channels for passing a gaseous heat-transfer medium, whereas each of the heat-exchanging plates has partitions providing a required flow direction for the gaseous agent liberated from the liquid heat-transfer medium and contributing to its discharging from the zones of its liberation disposed at different height of the channel.The heat exchanger is provided with a device for external passing of the liquid heat-transfer medium between the adjacent heat-exchanging sections 34 and 33 made as a vertical chamber 35 with bubbling elements 36 therein, a union 38 for additional introduction of the gaseous heat-transfer medium being placed in the lower portion of the chamber 35, while the upper portion thereof is provided with a union 40 for gas discharge.The heat exchanger according to the invention can be effectively used for carrying out heat-exchange processes followed by liberation of a gaseous agent from the liquid heat-transfer medium instead of the pipe heat exchangers traditionally used in the art.
摘要:
Process for disposing of the effluents from the distillers of ammonia-soda plants at the bottom of subterranean cavities of disused salt boreholes, the cavities being filled with a sodium chloride brine to prevent subsidence and an equivalent volume of the brine being recovered. The effluent introduced at the bottom of the borehole comprises a calcium chloride solution which has been concentrated to a density significantly higher than that of the saturated solution of sodium chloride present in the borehole.
摘要:
Free-flowing spherules of sodium bicarbonate are prepared from a sodium carbonate or from salt brine, substantially saturated with ammonia, by carbonating the sodium carbonate solution, or the ammonia-saturated brine with carbon dioxide in the presence of from 200 to 2500 parts per million of a water soluble alkaline phosphate. Spherules of sodium bicarbonate crystallizing from the solutions are separated as a product having a bulk density between about 32 to 48 pounds per cubic foot, and a screen size substantially between 14 and 100 mesh. Sodium carbonate spherules are also readily obtained by calcining the sodium bicarbonate spherules.
摘要:
1,099,318. Crystallizing. SOCIETA' EDISON. June 9, 1965 [June 10, 1964], No. 24466/ 65. Heading B1G. [Also in Division F4] Cooling and crystallization of a saturated solution is effected in a vessel by means of water-cooled heat exchange tubing 1 resiliently suspended from a frame 2 which is vibrated by a cam operated by a motor 18. The tubing is in the form of two bundles operating in parallel, each bundle comprising a plurality of tubes, each connected to the next alternately at the top and bottom. The solution is stirred by a propellor 19 between the bundles.