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7621968 |
Process for producing low sodium sea salt from seawater
There is provided a low sodium sea salt and a method for producing the same. A first amount of natural seawater containing sodium, chloride, potassium, magnesium, sulfate and other trace minerals...
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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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7517509 |
Purification of trona ores by conditioning with an oil-in-water emulsion
The present invention is a trona concentrate and a process for floating gangue material from trona ore that comprises forming an emulsion, conditioning the trona ore at a high solids content in a...
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7514051 |
Process for making high purity sodium sulfate
A method for purifying heavy metal impurities (such as antimony, arsenic, iron, cadmium, and lead) from 28 to 38 weight percent aqueous crude sodium sulfate solution is achieved by adding ferric...
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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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7427302 |
Method of manufacturing micro-disperse particles of sodium borohydride
A compact solid source of hydrogen gas, where the gas is generated by contacting water with micro-disperse particles of sodium borohydride in the presence of a catalyst, such as cobalt or...
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7410627 |
Sodium carbonate and sodium bicarbonate production
A method for solution mining nahcolite, capable of extracting nahcolite from geological formations lean in nahcolite comprising injecting high pressure water (which may include recycled aqueous...
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7018594 |
Crystallization of sodium carbonate decahydrate from liquors supersaturated in sodium bicarbonate
A process for recovering sodium carbonate decahydrate crystals from solutions and mother liquors supersaturated in sodium bicarbonate concentration. Feed liquors containing higher levels of sodium...
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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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6692716 |
Method of formulating alkali earth salts
Methodology for formulating sodium bicarbonate and potassium sulfate. In one embodiment, sodium sulfate and ammonium bicarbonate are reacted to form sodium bicarbonate with the remaining liquor or...
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6689334 |
Process for reducing or avoiding foam production during chemical and physical materials conversion processes
The production of foam which occurs in many chemical and physical materials conversion processes can be avoided by performing the materials conversion process in an ascending jet reactor, including...
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6667021 |
Method for producing enhanced sodium carbonate crystals for making sodium bicarbonate
n the manufacture of sodium carbonate having increased CO 2 uptakes the carbonation reaction to form sodium bicarbonate is enhanced by the addition of particular amounts of a cationic quaternary...
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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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6652603 |
Process for removing sodium sulfate from nickel hydroxide effluent streams
A method for removing sodium sulfate from nickel and ammonia containing aqueous effluents. The effluents, typically from a nickel hydroxide production process, are cooled to or below 30° C. to...
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6576209 |
Process for producing sodium salts
A process for producing sodium salts, which comprises adding solid sodium carbonate to a first aqueous solution containing sodium carbonate and sodium hydrogencarbonate, to prepare a second aqueous...
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6514475 |
Process for the production of sodium carbonate anhydrate
The invention is directed to a process for the production of sodium carbonate-anhydrate having a bulk density of at least 800 kg/m 3 , said process comprising: providing a suspension of solid...
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6500216 |
Method and apparatus for desalinating sea water, natural salt and fresh water
A method and an apparatus of producing natural salt or fresh water by treating sea water in an extremely short period of time and with high efficiently. The distilled water and salt components are...
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6475458 |
Method for formulating food grade sodium bicarbonate
There is disclosed a method for formulating food grade sodium bicarbonate by purification of a sodium bicarbonate liquor where an initial saturated feedstock of sodium bicarbonate which contains...
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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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6436154 |
Use of dodecylbenzene sulfonic acid or salt as a scale inhibitor
The formation of scale on equipment surface in contact with sodium alkali containing brines is inhibited by the addition of an alkylbenzene sulfonic acid or salt thereof to the brines.
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6340452 |
Sodium percarbonate and process for producing it
The invention relates to a novel sodium percarbonate in the form of agglomerates of small crystals. The average particle size of the agglomerates is greater than 600 μm. The apparent density of...
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6334989 |
Production of water-free soda
A process is presented in which anhydrous soda is crystallized and worked up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m 3 . The process is characterized in that a...
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6284005 |
Sodium carbonate recrystallization
The present invention provides a process for producing sodium carbonate monohydrate crystals by introduction of anhydrous sodium carbonate into a saturated sodium carbonate brine solution under...
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6270740 |
Method of producing modified sodium carbonate crystals for the production of sodium bicarbonate
An improved method of purifying sodium carbonate from a natural source whereby a dissolved sodium carbonate product is treated with a cationic compound, such as a quaternary amine, to react with...
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6251346 |
Solution mining of carbonate/bicarbonate deposits to produce soda ash
A solution mining process for recovering sodium values from an underground deposit of a sodium bicarbonate containing ore is disclosed. The process involves contacting the ore with an aqueous...
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6180074 |
Method for processing flue gases containing sulphur oxides
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6162263 |
Method for producing and shipping metal cyanide salts
Metal cyanide suitable for shipment is prepared by introducing an aqueous metal cyanide feed stream to a crystallizer to form a slurry of metal cyanide crystals in their mother liquor. The...
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6113657 |
Purification of caustic soda
In a process for preparing crystalline NaOH.3.5H 2 O, NaOH.3.5H 2 O is allowed to crystallize from an aqueous sodium hydroxide solution which contains sodium chloride and is saturated in respect...
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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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6042622 |
Process for crystallization of alkali metal bicarbonate salts
Alkali metal bicarbonate salts, e.g., sodium bicarbonate, are crystallized from aqueous solutions thereof in the presence of a crystal growth promoting amount of lecithin or lecithin containing...
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6022385 |
Process for the manufacture of sodium carbonate crystals from minerals or solutions
A method of producing sodium carbonate crystals from a sodium carbonate-containing solution including the steps of passing the sodium carbonate-containing solution to a precipitator, adding...
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5955043 |
Production of sodium carbonate from solution mine brine
A process for forming useful sodium salts by uniquely processing dilute mine brines obtained by solution mining of a sodium bicarbonate containing ore deposit with an aqueous solvent is disclosed....
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5911959 |
Method for purification and production of saline minerals from trona
Disclosed are a variety of processes for the purification of saline minerals and in particular, trona. Some of the processes include a combination wet and dry recovery process which results in high...
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5897848 |
Process for producing hypophosphite compounds
Methods for the production of nickel or ammonium hypophosphite are disclosed, including combining sodium hypophosphite with nickel or ammonium sulfate to produce sodium sulfate and nickel or...
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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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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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5783084 |
Process for the reclamation of process water from process wastewater generated in the battery manufacturing industry and other metals related industries
A process wastewater treatment plant, and a process relating thereto, which converts process wastewater generated in battery manufacturing and the like into clean process water and sodium sulfate...
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5770730 |
Synthesis of carbodimide analogs of chlorins and bacteriochlorins and their use for diagnosis and treatment of cancer
A method for the preparation of an imide derivative of purpurin by reacting hexylamine with a chlorin or bacteriochlorin having a macrocycle with a six-membered anhydride ring fused thereto, said...
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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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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...
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5417951 |
Process for the hydrothermal production of crystalline sodium disilicate
The invention is a process for the hydrothermal production of crystalline sodium disilicate by heating an aqueous mixture of quartz sand and sodium hydroxide or an aqueous solution of sodium...
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5360600 |
Treatment of mineral and alkali metal carbonate slurries
The present invention provides a process for recovering alkali carbonates such as alkali sesquicarbonates from slurries of minerals such as Trona which contain those carbonates as well as clays and...
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5338530 |
Recovery of glycine and Glauber's salt from waste crystal liquors
Glycine and sodium sulfate decahydrate are separated from a starting aqueous solution containing glycine, sodium sulfate, and impurities, by forming a slurry which is a solid mixture of glycine and...
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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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5294427 |
Continuous process for preparing sodium percarbonate
A process of continuously crystalizing sodium percarbonate by the reaction of sodium carbonate with hydrogen peroxide using first and second reaction vessels includes the steps of: (a) continuously...
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5290476 |
Process for preparing microcrystalline perborate products
A process for preparing microcrystalline perborate hydrate products and highly concentrated, storage stable aqueous solutions used for this purpose which have a stable active oxygen content and a...
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5290322 |
Process for the crystallization of sodium bicarbonate
Process for the manufacture of sodium bicarbonate particles having an ovoid or spherical shape, the process preparing an aqueous solution of sodium bicarbonate, which is supersaturated; circulating...
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5283054 |
Process for producing sodium salts from brines of sodium ores
A process for producing valuable sodium-based chemicals from a brine containing sodium carbonate and sodium bicarbonate, such as those containing from about 8% to about 20% total alkali obtained by...
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