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8778289 Method for economical extraction of lithium from solution including lithium  
The present invention relates to a method of extracting lithium from a lithium bearing solution. More specifically, the present invention provides a method of economical extraction of lithium from...
8318118 Process for the treatment of gas phase alkaline chloride in a combustion plant  
A process for the treatment of gas phase alkaline chlorides in a combustion plant that is arranged for combustion of solid fuel and which includes a combustion chamber from which a flue-gas flow is...
8197781 Sputtering target of Li3PO4 and method for producing same  
A method of forming a lithium orthophosphate sputter target or tile and resulting target material is presented. The target is fabricated from a pure lithium orthophosphate powder refined to a fine...
7258848 Process for scrubbing ammonia from acid gases comprising ammonia and hydrogen sulfide  
The present invention provides a process for removing ammonia as an aqueous salt solution from an acid gas comprising ammonia and hydrogen sulfide. A strong acid, such as sulfuric acid, is used as...
7204968 Method of producing heat energy  
Energy in the form of heat is recoverable and controllable in a process that reacts an acid and a base in the presence of steam. The recovered heat energy can be used to vaporize water to form...
6893494 Stable metal zirconium phosphates for color applications  
The invention provides a stable metal zirconium phosphates having formula (I), in which X is a metal or a combination of metals selected from Co, Mn, Ni, Cu, Cd, Fe, Cr, Al, Sn, V, Zn, Sc, Na, Mg,...
6565756 Method for the conditioning of phosphoric acid  
A method for the conditioning of phosphoric acid containing solutions is described, wherein the solution is converted to a solid material by adding an aluminum compound. This solid material can...
6280494 Method for producing fertilizer grade DAP having an increased nitrogen concentration in a spray column  
A process of forming a mixture of diammonium phosphate and triammonium phosphate by the reaction of phosphoric acid with gaseous ammonia in a spray column. In the process, the reaction occurs under...
6117406 Process for manufacturing ammonium salts  
A process for manufacturing ammonium salts using a reactor which includes a first tubular reaction chamber having at least one acid feed and at least on ammonia feed which are arranged in a first...
5820632 Prepared calcium phosphate composition and method  
Setting times of calcium phosphate cement compositions are enhanced by the addition of phosphate or carbonate lubricant compositions. Methods for preparing the cement compositions are provided.
5814292 Comprehensive energy producing methods for aqueous phase oxidation  
An aqueous phase oxidization process for the oxidization of any nonoxidized feed material using a mixture of a feed material, an oxidizing acid, such as nitric acid; oxygen gas, water and...
5443808 Method of producing alkali metal phosphate  
The invention relates to a method for producing alkali metal phosphate, in particular monopotassium phosphate or its aqueous solution, by reacting fertilizer-grade phosphoric acid with alkali metal...
5336264 Situ prepared calcium phosphate composition and method  
Setting times of calcium phosphate cement compositions are enhanced by the addition of phosphate or carbonate lubricant compositions. Methods for preparing the cement compositions are provided.
5244645 Process for removing NH3 from a liquid stream  
This invention is a process for removing NH3 from a NH3 -containing liquid stream. The process contains the following steps: (a) passing a NH3 -containing first liquid stream, a heated first...
5124137 Process for the preparation of alkali metal phosphate solutions  
Alkali metal phosphate solutions having a fluorine content of less than 20 ppm, based on P2 O5, are prepared by first digesting crude phosphate using sulfuric acid, and separating the calcium...
5114460 Production of low-chloride alkali metal phosphates  
Potassium phosphate useful as a low-chloride content fertilizer is prepared by reacting phosphoric acid, commercial or technical grade, with fertilizer-grade potassium chloride (Muriate of Potash,...
5022913 Stabilized ammonium orthophosphate suspensions  
An improved batch process for the production, in equipment readily available at the fertilizer dealer level, of high-analysis stable ammonium orthophosphate suspension fertilizers effected by the...
4919906 Processes and equipment for production of elemental phosphorus and thermal phosphoric acid  
New processes and equipment are disclosed for producing elemental phosphorus and thermal phosphoric acid. Benefits are listed below. 1. Phosphorus-containing solids are recycled to smelting...
4904459 Process for working up dusts which are produced in the electrothermal production of phosphorus  
A process is provided for working up dusts which have been precipitated electrostatically from the gas mixture composed essentially of carbon monoxide and phosphorus vapor produced in the...
4853200 Continuous process for preparing sodium orthophosphate slurries from natural soda ash orthophosphoric acid  
Unmilled commercially available granular "natural" soda ash is reacted with orthophosphoric acid to produce a highly concentrated slurry at a molar Na:P ratio of about 1.5 in a continuous process....
4836995 Process for the manufacture of monopotassium phosphate  
The present invention relates to a process for the manufacture of monopotassium phosphate using solvent extraction technique. According to the invention, the reaction occurs between phosphoric acid...
4751066 Process for preparing alkali metal phosphate  
Alkali metal phosphates are recovered from a water immiscible solvent solution of aqueous wet process phosphoric acid by neutralizing the acid with a basic alkali metal salt in a ratio of alkali...
4721519 Stable ammonium polyphosphate liquid fertilizer from merchant grade phosphoric acid  
A stable ammonium polyphosphate liquid fertilizer is prepared from concentrated wet-process phosphoric acid of 54-62% P2 O5, which prior to concentration is treated with a cation exchange resin to...
4720598 Process for preparing a basic lithium phosphate catalyst for the isomerization of alkene oxides  
Process for preparing a basic lithium phosphate catalyst suitable for the gas phase isomerization of an alkene oxide to the corresponding alcohol, in which process an aqueous solution of a lithium...
4678650 Process for making an alkali phosphate solution  
An aqueous alkali phosphate solution is made. An organic phase is countercurrently mixed with an aqueous phase, the two phases being used in a volume ratio larger than 1:1 and formed aqueous alkali...
4676963 Manufacture of sodium tripolyphosphate from wet acid  
A process is described for converting wet acid into sodium tripolyphosphate by pretreating the wet acid in a pretreatment stage with a sodium source and SiO2 to precipitate fluoride values from the...
4662929 Method for recovering nutrients from the flue gases of a fertilizer plant  
The invention relates to a method of recovering nutrients from the flue gases of a fertilizer plant by exposing hot, almost water-saturated reaction gases (4) obtained from the fertilizer...
4640824 Process for making alkali metal phosphate solutions containing little fluorine  
The disclosure relates to a process for making alkali metal phosphate solutions containing little fluorine from pre-purified alkali metal phosphate solutions obtained from crude phosphoric acid by...
4637921 Process for producing ammonium polyphosphate  
An improved process of concentrating wet process phosphoric acid by continuously contacting an acid feed containing at least about 56 weight percent of P2 O5 based on the total weight of the feed...
4632812 Process for making alkali metal phosphate solutions containing little vanadium  
Alkali metal phosphate solutions containing little vanadium are made from phosphoric acid containing vanadium. To this end, a negative redox potential is established in the phosphoric acid by...
4632813 Process for the production of water soluble ammonium phosphates  
A process is disclosed for the production of water soluble ammonium phosphates, comprising the following steps: (a) to react in a reaction step ammonia and untreated phosphoric acid with P2 O5...
4610862 Process for producing purified diammonium phosphate from wet process phosphoric acid  
A process for producing purified diammonium phosphate (abbreviated to DAP) directly from wet process phosphoric acid with a high yield is provided, which process comprises reacting wet process...
4610853 Process for producing purified monoammonium phosphate from wet process phosphoric acid  
A process for producing purified monoammonium phosphate (abbreviated to MAP) directly from wet process phosphoric acid with a high yield is provided, which process comprises reacting wet process...
4596703 Process for purifying wet-processed phosphoric acid  
The disclosure relates to a process for purifying crude, concentrated wet-processed phosphoric acid. To this end, the disclosure provides: (a) for the organic solvent to be mixed with the starting...
4565680 Recovery of phosphorus and aluminum from spent acid from the bright-dip aluminum finishing process  
In the process of the invention spent phosphoric acid is concentrated and stripped with air to a greater than 50% P2 O5 concentration to remove nitric acid. As a result of concentrating the spent...
4556548 Process for purifying wet-processed phosphoric acid  
The disclosure relates to a process for purifying crude, concentrated wet-processed phosphoric acid. To this end, the disclosure provides: (a) for the organic solvent to be mixed with the starting...
4540557 Process for reducing the fluorine content in wet-processed phosphoric acid  
The disclosure relates to a process for reducing the fluorine content in wet-processed phosphoric acid. To this end, the disclosure provides for an acid extract in an organic solvent to be treated...
4537615 Fertilizer from phosphorus furnace waste stream  
Processes and compositions of matter are disclosed for the production of liquid fertilizers wherein wastewater from a phosphorus smelting furnace is incorporated in liquid fertilizer processes. The...
4522638 Method and apparatus for regulating the NH3 content in scrubbing liquid used in a gas scrubbing process  
A process for regulating the NH3 content in an organic liquid that acts as a physical scrubbing agent and is used in a procedure for absorbing sour gases from gaseous mixtures. To ensure...
4514365 Process for recovering a uranium-containing concentrate and purified phosphoric acid from a wet process phosphoric acid containing uranium  
A process for recovering from a wet process phosphoric acid which contains uranium, a uranium containing concentrate and a purified phosphoric acid. The wet process phosphoric acid is treated with...
4495165 Method of purification of phosphoric acid  
Appreciable inorganic impurities and organic matter are removed from impure phosphoric acid, particularly wet-process phosphoric acid, by pyrolysis of a mixture containing the raw acid and porous...
4493820 Process for partial removing of impurities from a wet process phosphoric acid  
A process for the partial removal of impurities present in a wet process phosphoric acid used in the production of granulated mono- or di-ammonium phosphate fertilizers in order to control the...
4482466 Heat pumping process based on the principle of absorption  
Phosphoric acid, especially orthophosphoric acid, is employed as the absorption medium in an absorption heat pumping system using water as its working medium. The acid may contain additions of...
4420321 Process for removal of carbon black floc associated with wet-process phosphoric acid in the production of fertilizers  
Black carbonaceous floc in wet-process phosphoric acid is removed by contact with an oxidizing agent during the neutralization step with ammonia. In an embodiment the black floc is removed in...
4390509 Process for manufacturing ammonium phosphate utilizing an oxalic acid acidulating process  
A process for the manufacture of phosphoric acid from phosphate rock is provided. The phosphate rock is digested or acidulated with an acid solution containing oxalic acid to produce phosphoric...
4375980 Production of suspension fertilizers from orthophorphoric acid  
An improved process for the production of concentrated, high-grade, nitrogen-phosphate (N--P2 O5) base suspension fertilizer from wet-process or other phosphoric acids and ammonia. The process...
4369168 Regeneration of carbon employed in the wet process production of alkali metal phosphates  
In a process for regenerating the activated carbon and in the purification of brown phosphoric acid or alkali phosphates obtained via the so-called wet process employing mineral acid digestion of...
4341739 Phosphoric acid ammoniation apparatus  
Aqueous ammonium phosphate solutions can be produced using an apparatus comprising: a fluid reactor having a plurality of inlets at one end thereof suitable for the admission of phosphoric acid,...
4325927 Purified monoammonium phosphate process  
A method of producing purified monoammonium phosphate from wet process phosphoric acid and ammonia is provided. The ammoniation takes place in two stages, the acid being ammoniated in the first...
4313918 Process and device for the preparation of a product containing ammonium orthophosphate, and product obtained by this process  
Ammonium orthophosphate products are prepared by reacting ammonia and phosphoric acid together at high speed under vigorous mixing conditions by spraying the reactants through a two-phase, dual...
Matches 1 - 50 out of 157 1 2 3 4 >