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7303593 |
Method to blend separator powders
A method for making a blended powder mixture, whereby two or more powders are mixed in a container with a liquid selected from nitrogen or short-chain alcohols, where at least one of the powders...
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7014832 |
Simultaneous recovery of potassium chloride and KCL enriched edible salt
The present invention relates to recovery of industrial grade potassium chloride and low sodium edible salt from bittern as part of an integrated process. The process comprises, mixing low sulphate...
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6986878 |
Method of producing potassium sulfate via cation exchange
A process for producing potassium sulfate from potash and sodium sulfate, which involves providing a source of sodium sulfate and passing the sodium sulfate through cationic exchanger. Eluted...
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6890509 |
Process for recovery of low sodium salt from bittern
A new process for recovery of Low Sodium Salt from bittern has been described in the present invention, the said process comprising desulphatation of bittern (by-product of salt industry),...
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6884269 |
Continuous method for manufacture of uniform size flake or powder
A method and apparatus for continuous fabrication of homogeneous thin flake or powder electrolyte material from inorganic salt, metallic or similar materials or from mixtures of such materials for...
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6660049 |
Process for control of crystallization of inorganics from aqueous solutions
Process of crystallization of sodium bicarbonate from solution mined Nahcolite pregnant liquor comprising the use of from about 2 to 100 parts per million of lecithin, introduced full strength,...
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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, MgCl 2 .6H 2 O), and lithium...
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6464736 |
Recrystallization process
The present invention provides a process for producing crystals of a polymorphic compound in a first crystal structure by introduction of the compound in a second crystal structure into a saturated...
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6340373 |
Process for recovering and treating of aqueous solutions
There is described a method for the treatment and processing of solutions of an organic fluid, water and one or more compounds of alkaline earth metals, alkali metals and metal ions, comprising the...
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6334878 |
Apparatus and method for crystallization
An apparatus for crystallization, which contains a crystallization vessel, a seed supplying device, a feed solution supplying device and a tube baffle disposed within the crystallization vessel....
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6143271 |
Process for producing potassium sulfate from potash and sodium sulfate
The present invention provides a process for producing potassium sulfate from a potash and a sodium sulfate source, comprising the steps of: (a) treating a portion of the potash source and sodium...
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6099595 |
Process for the preparation of crystalline sodium silicates
The invention relates to a process for the preparation of crystalline sodium silicates having a sheet structure and high δ phase content from water glass, which has been prepared hydrothermally,...
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5993759 |
Production of lithium carbonate from brines
Lithium carbonate can be efficiently produced from a brine by (i) removing the boron therefrom, (ii) diluting the boron-free brine, (iii) removing magnesium from the diluted brine, and (iv) adding...
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5895523 |
Process for making basic alkali metal sulfate pigments
A process is provided for making K 2 SO 4 3Al 2 O 3 4S0 3 +xH 2 O or Na 2 SO 4 3Al 2 O 3 4SO 3 +xH 2 O where x is a number from 4 to 12, which is used as a pigment. Sulfuric acid, one...
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5871551 |
Process for the preparation of anhydrous sodium sulfate
A process for the preparation of anhydrous sodium from a thenardite ore containing sodium sulfate comprising the steps of: crushing the thenardite ore; lixiviating the crushed ore in a first...
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5871571 |
Inks and UV-opaque protectorants comprising basic sodium and/or sodium/potassium aluminum sulfates and process for making such commercial products
A process for making ink which begins with a leach liquor of Al 2 (SO 4 ) 3 +K 2 SO 4 +Fe 2 SO 4 and other sulfates that are introduced to a surface-cooled crystallizer that drops the Al 2 ...
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5846501 |
Process for the selective recovery of the salt constituents from used hardening shop salts which contain nitrite-nitrate
In order to recover in an environmentally sound and economic manner used hardening shop salts which contain nitrate-nitrite, the salts, comminuted to particle sizes of from 1 to 50 mm, are...
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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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5769906 |
Process for recovering the salt constituents from hardening-shop salt baths
The process for environmentally acceptable and economical recovery of chloride salts from hardening-shop used salts utilizing the steps of leaching of the used salt, detoxification of the cyanide...
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5716419 |
Process for crystallization of mineral salts
Mineral salts, e.g., potassium chloride, are crystallized from aqueous solutions thereof in the presence of a crystal growth promoting amount of lecithin or lecithin containing compositions....
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5690701 |
Process for the manufacture of particles of coated persalts
Continuous process for the manufacture of solid alkali metal persalt particles coated by crystallization of a supersaturated aqueous solution of persalts and covering of the persalt particles in a...
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5674617 |
Granulated alkali metal cyanide
New alkali metal cyanide granulates based on sodium cyanide or potassium cyanide and a method for their preparation are disclosed. Commercially available alkali metal cyanide granulates consist of...
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5651796 |
Method for producing low bulk density hollow fine powder of alkali metal compound
A low bulk density hollow fine powder of alkali metal compound can be produced from an aqueous solution of the compound by one step. The method for producing a low bulk density hollow fine powder...
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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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5466266 |
Closed system multistage superpurification recrystallization
A method and apparatus are provided for superpurifying crystallizable substances to a purity level of 99.999%. Included is a closed multistage system which maintains controlled transfers of...
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5449506 |
Process for producing potassium carbonate
A method for producing potassium carbonate using a continuous countercurrent exchange system. A continuous ion exchange system with resin in the ammonium form is flushed with a saturated potassium...
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5445805 |
Large potassium bicarbonate crystals and process for the preparation thereof
A large size, small surface area, granular crystalline potassium bicarbonate product suitable for application as an active ingredient in pharmaceutical oral unit dosage forms useful for the...
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5382265 |
Perchlorate removal process
A process for removing perchlorate ion from waste water using KCl is disclosed. In the process, waste perchlorate is concentrated by water evaporation in a stripping tower. Ammonia and volatile...
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5330544 |
Process and apparatus for increasing the size of ammonium sulfate crystals
The average size of ammonium sulfate crystals is increased by passing undersized ammonium sulfate crystals through a multistage apparatus in which the crystals are contacted with an aqueous...
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5300123 |
Method of reforming soluble salts to effect purification and increase crystal size thereof
A method of reducing soluble and insoluble impurity levels while increasing the size of water soluble salt crystals which includes an initial step of fine grinding followed by regrowth in a...
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5211922 |
Process for the recovery of values from secondary aluminum dross
A process for recovery of metallic aluminum, sodium and potassium chloride and an aluminum oxide-metallic aluminum product from secondary aluminum dross. A secondary aluminum dross feed is...
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5126019 |
Purification of chlor-alkali membrane cell brine
This invention relates to methods and systems for purifying brine for electrolysis in chlor-alkali cells, especially membrane cells by reducing the sulfate ion concentration, while at the same time...
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5123997 |
Plenum type crystal growth process
Crystals are grown in a tank which is divided by a baffle into a crystal growth region above the baffle and a plenum region below the baffle. A turbine blade or stirring wheel is positioned in a...
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5124265 |
Method and apparatus for crystallization process control
A crystallizer control method and apparatus that generate control signals to manipulated process parameters on the basis of on-line information derived from the measurement of the crystal...
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5122224 |
Direct flow crystal growth system
A crystal is grown in a constantly filtered solution which is flowed directly into the growing face of a crystal. In a continuous flow system, solution at its saturation temperature is removed from...
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5085670 |
Production of potassium chloride crystals
Potassium chloride crystals of larger and/or more regular size are produced by conducting the crystallization in the presence of a small amount of a branched C 12 monoalkylated diphenyl ether...
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5068092 |
Crystallizer, process and apparatus for producing sodium chloride crystals
Disclosed is a flow-through sodium chloride crystallizer comprised of a vertically-oriented crystallizer body having at least two segments of different cross-sectional area, at least two inlets for...
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5006199 |
Process for preparing single crystal of potassium titanium arsenate
Disclosed is a process for preparing a single crystal of potassium titanium arsenate by flux growth method, wherein a compound of K 2 ZO 4 , in which Z is at least one of W, S, Mo and Cr, is used...
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4975200 |
Potassium fluoride removal from potassium chloride
The removal of fluoride ion from potassium chloride containing at least a small amount of an acidic component with water is improved by adjusting the pH of the aqueous solution employed in a...
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4915705 |
Production of silica and fluorine-containing coproducts from fluosilicic acid
A process for producing high grade silica and fluorine-containing coproducts from fluosilicic acid is described. To produce silica, the fluosilicic acid is reacted with aqueous ammonia to produce a...
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4902301 |
Process for shipment of sodium cyanide slurries
A process for manufacturing, shipping and unloading substantially solid, ice-like sodium cyanide dihydrate containing essentially no liquid water. A slurry of 58 weight percent or higher sodium...
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4844880 |
Process for the manufacture of sodium metabisulfite
An improved process for the manufacture of sodium metabisulfite is provided. In this process, the chemical reaction forming sodium bisulfite solution is carried out separately from the...
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4776930 |
Process for the preparation of potassium nitrate
A process is disclosed for the preparation of potassium nitrate by means of the reaction of nitric acid with potassium carbonate, wherein potassium carbonate is obtained by means of an...
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4775546 |
Process for treating potassium chloride
A process for treating potassium chloride, wherein the potassium chloride is dissolved in an aqueous medium and resulting solution is heated to evaporate water contained therein.
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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...
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4617179 |
Process for effecting seeding in two phases for producing large-grain alumina
The invention concerns a process for the precipitation of aluminium hydroxide by seeding in two phases, which is intended to produce at a high level of productivity alumina with large grains,...
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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...
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4568353 |
Process of producing coarse, pure potassium chloride crystals
In a process of producing coarse pure potassium chloride crystals from feed solutions containing potassium chloride and other impurities, comprising cooling the solution under a vacuum in a...
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4562058 |
Process for crystallizing potassium sulfate
An improved process for the production of potassium sulfate crystals by the reaction of saturated solution of potassium chloride with langbeinite in the solid phase at a temperature of from...
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4547197 |
Treatment of brine elutriate
The invention relates to the treatment of brine and more particularly the treatment of the brine elutriate drawn off after evaporation of the brine at an elevated temperature to separate some of...
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