Class 23/295S - Solar

Subclass of Class 23 - Chemistry: physical processes
No. of patents: 21
Last issue date: 09/20/2011

Number	Title	Issue Date
8021442	Process for the preparation of common salt of high purity from brines in solar salt pans The process of the invention is an improvement over the existing process of producing salt of high purity from alum-treated brine disclosed recently in the prior art. More particularly, the invention rectifies the ratio of Ca2+ to Mg2+ from a v...	09/20/2011
7041268	Process for recovery of sulphate of potash The present invention is directed to a novel integrated process for the recovery of sulphate of potash (SOP) from sulphate rich bittern. The process requires bittern and lime as raw materials. Kainite type mixed salt is obtained by fractional crystallization of the ...	05/09/2006
6776972	Recovery of common salt and marine chemicals from brine A new process for recovery of common salt, potassium chloride, concentrated magnesium chloride with enriched bromide, and high purity magnesia from brine in an integrated manner, said process comprises preparation of calcium chloride by reaction of hydrochloric acid...	08/17/2004
6547836	Process for obtaining monohydrated lithium sulfate from natural brines A process for obtaining monochlorated lithium sulfate from natural brines by mixing two brines: one saturated or nearly saturated with silvite (KCl), carnallite (KCl, MgCl2.6H.sub.2 O), and lithium sulfate (Li2 SO4.H.sub.2...	04/15/2003
5447543	Process for crystallizing inorganic salts The present invention is an improved method for crystallizing inorganic salts. The inorganic salts that are suitable for this process are characterized by the fact that they form isothermic or polythermic concave solubility curves. Each concave solubility...	09/05/1995
5128115	Manufacture of silicon carbide using solar energy A method is described for producing silicon carbide particles using solar energy. The method is efficient and avoids the need for use of electrical energy to heat the reactants. Finely divided silica and carbon are admixed and placed in a solar-heated rea...	07/07/1992
4723962	Process for recovering lithium from salt brines An improved process is described for recovering lithium from evaporatively concentrated brines. Epsom salt recovered from the brine at about 0° C. is added to the concentrated lithium-containing brine, so as to precipitate lithium sulfate monohydrate, th...	02/09/1988
4690797	Method for the manufacture of large area silicon crystal bodies for solar cells A method for the manufacture of large area silicon crystal bodies suitable for use in the manufacture of solar cells wherein silicon powder having a small grain size is used as the starting material. This powder is compressed to form a thin layer in a sui...	09/01/1987
4603033	Salt harvester for harvesting salt in elongated solar salt crystallizer An improved harvester for harvesting a salt crop from the bottom of a shallow, elongated solar crystallizer containing a substantially saturated salt solution overlying the salt crop. The harvester includes track means extending longitudinally along the s...	07/29/1986
4569676	Separation and purification of salts in a non-convective solar pond Brine containing at least two salts, one or more of the salts having a higher hydrated form and a lower hydrated or anhydrous form, is fed to a non-convective solar pond and one of the salts having a higher hydrated form and a lower hydrated or anhydrous ...	02/11/1986
4564367	Solar salt crystallizer and process for producing salt A solar crystallizer and a process for producing solar salt adaptable for use in climates heretofore believed unfavorable for solar salt production. The invention employs a solar crystallizer defining a shallow pond of salt solution the level of which is ...	01/14/1986
4488958	Method of preparing highly purified kiln dried solar salt Partially purified salt containing less than about 00.4 weight percent insolubles is further purified to reduce the insolubles until the milk pad rating is 3 or better for certain industrial uses and 1 for human consumption. The entry salt is washed in cl...	12/18/1984
4386936	Production of potassium chloride using pond crystallization Disclosed is a method of increasing and maintaining high concentrations of potassium chloride in a refinery process stream of brine containing potassium chloride, sodium chloride and a minor amount of salt impurities by mixing with a first process stream ...	06/07/1983
4333736	Method of utilizing solar ponds for effecting controlled temperature changes of solutions particularly in processes involving the dissolution and/or precipitation of salts A method of changing the salt content of a solution is described by including the salt in a nonconvective solar pond heated by solar radiation and having stable salt-concentration and temperature gradients increasing from the top to the bottom of the pond...	06/08/1982
4306880	Recovering by-products from sea water brines and the like The improved production of sodium sulfate, potassium sulfate and other valuable salts from salt plant bitterns or the like wherein initial reduction in sulfate ion concentration yields salt cake and greatly facilitates the selective recovery of potassium ...	12/22/1981
4287163	Process for recovering lithium from brine by salting out lithium sulfate monohydrate A salting-out process for recovering lithium from brines which have been concentrated by solar or thermal evaporation. Soluble sulfate salts are added to the strong brine solutions containing lithium to yield lithium sulfate monohydrate. Subsequent treatm...	09/01/1981
4243392	Process for solar concentration of lithium chloride brine By evaporation employing solar energy, a brine having a lithium chloride concentration greater than that of a brine whose vapor pressure under ambient conditions is substantially equal to the partial pressure of moisture in the atmosphere above the brine ...	01/06/1981
4179493	Dehydration process Disclosed is a process for the production of partially dehydrated or anhydrous salts from higher hydrates of the same salt, utilizing solar energy. Hydrated salts which have an increasing solubility with an increase of temperature, possessing a transition...	12/18/1979
4088451	Concentration of underground brines in situ by solar evaporation A process is provided for the recovery of chemicals, such as chlorides, sulfates, carbonates and borates of such alkali metals as sodium and potassium, among others, from underground brines associated with an ore body containing said chemicals, wherein th...	05/09/1978
4072472	Production of high purity salt from high sulfate salt deposits A subterranean salt deposit is solution mined, and the resulting calcium- and sulfate-contaminated brine is treated, e.g., by soda ash, to precipitate insoluble calcium compounds. The resulting slurry is settled, and the effluent clear brine is evaporated...	02/07/1978
3966541	Concentration of underground brines in situ by solar evaporation A process is provided for the recovery of chemicals, such as chlorides, sulfates, carbonates and borates of such alkali metals as sodium and potassium, among others, from underground brines associated with an ore body containing said chemicals, wherein th...	06/29/1976

PatentStorm

Quotables

PatentStorm News

Class 23/295S - Solar