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7611208 |
Methods for constructing underground borehole configurations and related solution mining methods
Disclosed are methods for solution mining of evaporite minerals, such as trona, comprising drilling an access well and at least two lateral boreholes; injecting a fluid; circulating the fluid...
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7527773 |
Rare earth oxide nanocrystals and methods of forming
A method of forming rare earth oxide nanocrystals include the steps of dissolving a rare earth including compound in a solution containing at least one organic solvent, heating the solution to a...
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7507388 |
Process for production of dense soda, light soda, sodium bicarbonate and sodium silicate from solutions containing bicarbonate
A process related to sodium chemicals production, including the processing of bicarbonate containing solutions obtained by solution mining of trona, nahcolite or wegscheiderite reserves and the...
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7404828 |
Method for the production of particles
A method of preparing particles of a substance, for example selected from a flavor, fragrance, pigment, dye, biologically active compound or a plastics material, comprises contacting the substance...
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7001526 |
Optical isomer separation method
Methods for separation of two optical isomers in a racemate into its constituent isomers by statistical means are described, whereby the saturated racemate solution is first allotted into small...
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6855176 |
Emulsion crystallisation with recycle
A method for purifying substances through emulsion crystallisation is described, whereby (a) an emulsion of organic liquid droplets in a continuous water phase containing the impure substance is...
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6027607 |
Salt extraction process and device
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5840085 |
Process for removing sodium chloride and potassium salts from ash collected from a soda recovery boiler
This invention relates to a process for removing sodium chloride and potassium salts, which are impurities concentrated and accumulated in pulp digesting chemicals, from ash collected from a soda...
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5503641 |
Process and apparatus for preparing a potassium chloride mixture
A potassium chloride mixture with grains of different sizes is extracted in a first stage with an unsaturated solution at an elevated temperature, whereby the finest grains are completely dissolved...
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5104478 |
Method for making single crystals
A method for making single crystals, comprising osmotically removing the solvent from a solution containing the material to be grown into a crystal.
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4997637 |
Digestive crystallizing process and apparatus for purification of KC1
Disclosed is a method of reducing the sodium chloride content of potassium chloride by forming an aqueous slurry of potassium chloride feed crystals having a wide particle size distribution with an...
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4822585 |
Silicon purification method using copper or copper-aluminum solvent metal
A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material in a solvent metal comprising copper or copper-aluminum combination and extracting heat...
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4734102 |
Process for concentrating a suspension
An apparatus for concentrating a suspension consisting of a hollow cylinder in which one or more tubes of a constant outward diameter extend in axial direction, in the wall of each tube at least...
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4683034 |
Process for separating dimethyl isophthalate and dimethyl orthophthalate from their mixture with dimethyl terephthalate
The invention relates to a process for separating dimethyl isophthalate (DMI) and dimethyl orthophthalate (DMO) and other by-products from their mixture with dimethyl terephthalate (DMT), formed in...
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4657559 |
Process for seed crystal preparation for phosphoric acid crystallization
The present invention relates to the processing of phosphoric acid by crystallization starting with phosphoric acid and adding relatively large amounts of fine, relatively pure seed crystals to...
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4544391 |
Method for separation of solid mixtures by simultaneous multi-stage recrystallization
A method for separating a desired component from a solid mixture by repeated recrystallization in a single vertical crystallizer having a plurality of chambers partitioned by solid-liquid...
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4333737 |
Reclamation of materials from photoflash cartridges
A process is provided for reclaiming materials from photoflash cartridges ich are comprised of aluminum, barium nitrate and potassium perchlorate. The photoflash composition is dumped into heated...
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4271131 |
Production of highly pure lithium chloride from impure brines
Highly pure lithium chloride suitable for use in production of lithium metal by electrolysis is obtained directly from impure natural or other lithium chloride brines by an integrated process in...
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4087253 |
Method of obtaining caustic soda from a sodium chloride liquor containing sulphate ions recovered from an electrolytic cell
A method of obtaining caustic soda and pure sodium chloride from an electrolytic cell liquor containing also sulfate ions including the steps of concentrating the liquor through multiple effect...
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4079116 |
Process for producing ammonium heptamolybdate and/or ammonium dimolybdate
A process for producing a high purity ammonium heptamolybdate and/or ammonium dimolybdate product by which a particulated molybdenum oxide concentrate is purified to remove contaminating metal...
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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...
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3994531 |
Method of solution mining potassium chloride from subterranean deposits
The present invention relates to an improved method of solution mining potassium chloride from subterranean ore deposits containing both potassium chloride and sodium chloride. By the present...
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3912803 |
Purification of phosphoric acid
Solvent extracted phosphoric acid obtained by the wet process, e.g. using a cyclic pentanone or hexanone, as the solvent extractant may be further purified by raising the concentration to a P 2 O...
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3910773 |
Beneficiation of salts crystallized from searles lake brine
Solar evaporation is used to selectively crystallize readily processable sodium and potassium salt groupings from a complex brine, such as Searles Lake brine. The harvested salt groupings are then...
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3891397 |
Crystallization of sodium chloride of reduced calcium sulfate content in presence of about 5 to about 500 ppm
A process for preparing from brine (an aqueous solution of salt) containing appreciable quantities of dissolved calcium sulfate either (1) high purity salt (sodium chloride) having the usual cubic...
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3642454 |
PRODUCTION OF POTASSIUM CHLORIDE FROM CARNALLITIC SALTS
Potassium chloride is produced from carnallitic salts consisting essentially of carnallite KCl . MgCl 2 . 6H 2 O) and halite (NaCl). The salt is contacted with an aqueous medium to dissolve...
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3634041 |
METHOD FOR THE PRODUCTION OF POTASSIUM SULFATE FROM POTASSIUM-CONTAINING DOUBLE SALTS OF MAGNESIUM SULFATE
Essentially pure schoenite is leached to produce potassium sulfate and a sulfate leach liquor. The sulfate leach liquor is then brought into contact with a crystal crop predominating in...
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3495953 |
METHOD OF SEPARATING STRONTIUM CHLORIDE FROM MIXED SOLUTIONS USING ETHANOL
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3441386 |
LEACHING POTASSIUM SALTS FROM MIXTURES IN THE PRESENCE OF SOLUBLE FERRIC,CHROMIC AND ALUMINUM SALTS
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3440023 |
OBTAINING KCI FROM CRUDE SALTS BY EQUILIBRATING AND DILUTING PRIOR TO PRECIPITATION
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3386989 |
Process for continuous production of carbon tetrafluoride
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3382161 |
Electrolytic separation of transition metal oxide crystals
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3357800 |
Purification of magnesium chloride with alcohol
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3151945 |
Process for the production of pure borohydrides
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3010808 |
Hydrogen peroxide
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3005691 |
Method of and apparatus for segregating by fractional solidification
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2927010 |
Process for the beneficiation of sylvite ores
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2884309 |
Purifying alkali metal hydroxide solutions
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2862799 |
Separation of tri-(phosphonitrilic chloride)
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2828193 |
Method for rejuvenation of aluminum treating solutions
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2813122 |
Adipic acid crystallization
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2807520 |
Method of separating water and anhydrous sodium sulfate from coagulating and washing baths employed in viscose manufacturing processes
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3846081 |
Title is not available
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3749557 |
Title is not available
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3690844 |
Title is not available
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3679374 |
Title is not available
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3592615 |
Title is not available
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