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| Number | Title | Issue Date |
| 4822583 | Phosphate feed material for phosphorus electric furnaces and production of same Compacted shapes of phosphatic material, suitable as a charge for a phosphorus furnace, are produced by compacting a mixture of calcined phosphate fines and phosphoric acid. The compacted shapes are conveniently produced on a roll briquetting press.... | 04/18/1989 |
| 4806326 | Phosphate feed material for phosphorus electric furnace Nodule fines, formed by abrasion of an electric furnace feed material of phosphate shale nodules, are utilized by mixing a recycle stream of the nodule fines with fresh phosphate in the presence of phosphoric acid prior to forming the shale into nodules. ... | 02/21/1989 |
| 4783328 | Utilization of phosphourus containing by-products Phosphorus values in the raffinate from wet acid purification and nodule fines from an electric phosphorus furnace are recovered as elemental phosphorus by forming briquettes with a bed of the raffinate and nodule fines, curing the briquettes and feeding ... | 11/08/1988 |
| 4781934 | Process and composition for curing meat Pork and other meat products are cured with pickling solutions from which nitrite is effectively exhausted during curing, thereby avoiding nitrosoamine formation, by buffering the solutions at the requisite acid pH with an alkali metal (M) glassy phosphat... | 11/01/1988 |
| 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 metal to phosphorus of 1 to 3.5 to form at least the mono al... | 06/14/1988 |
| 4729881 | Hydrometallurgical process for the production of beryllium Beryllium is efficiently recovered from silicate ores in a hydrometallurgical, single solvent, process which avoids the complexities, high costs and hazards ofpyrolytic, fluorination and acid leach methods, by contacting the ore in a closed reactor at ele... | 03/08/1988 |
| 4713228 | Heat recovery in the manufacture of phosphorus acids Heat is recovered from the phosphorus combustion chamber of a furnace phosphoric acid plant by placing in the combustion chamber a heat exchange surface having a protective meta acid coating thereon. Pressurized water can be used as a heat exchange fluid.... | 12/15/1987 |
| 4698067 | Formcoke having modified bituminous binder Formcoke is produced by introducing feedstocks of calcined coal particles, bituminous binder, an aqueous carbohydrate and phosphoric acid into a mixing zone. The resulting mixture is compacted into shapes, such as briquettes, which are then cured in an ox... | 10/06/1987 |
| 4664896 | Process for purifying yellow phosphorus In the process of purifying yellow phosphorus by treating liquid yellow phosphorus with active carbon and separating the purified phosphorus from the spent active carbon containing adhering phosphorus, the spent active carbon is mixed with sufficient liqu... | 05/12/1987 |
| 4656019 | Production of Phase II sodium tripolyphosphate The concentration of Phase II sodium tripolyphosphate in the sodium tripolyphosphate produced by spray drying a feed liquor comprising sodium orthophosphate, sodium pyrophosphate or mixture thereof, is increased to at least 90% by weight of sodium tripoly... | 04/07/1987 |
| 4602917 | Formcoke having modified bituminous binder Formcoke is produced by separately introducing feedstocks of calcined coal particles, bituminous binder and a carbohydrate, preferably an aqueous sugar, into a mixing zone. The resulting mixture is compacted into shapes, such as briquettes, which are then... | 07/29/1986 |
| 4551320 | Treatment of concentrated phosphoric acid The calcium content of high purity concentrated phosphoric acid is reduced to not more than about 2 ppm by contacting the acid with a strong cation exchange resin.... | 11/05/1985 |
| 4536377 | Process for making sodium tripolyphosphate A one step spray drying process for making high assay sodium tripolyphosphate having a high concentration of form I material by spray drying an aqueous sodium orthophosphate feed liquor having an Na2 O:P2 O5 ratio of 1.60 ... | 08/20/1985 |
| 4532065 | Method and composition for cleaning anodized aluminum Cleansing compositions useful in cleaning anodized aluminum contain a detergent builder, a detergent agent and a soluble salt of a transition metal. The presence of the transition metal ion protects the anodized coating from attack by the detergent builde... | 07/30/1985 |
| 4526762 | Recovery of vanadium from acidic solutions thereof Vanadium is recovered from acidic solutions by oxidizing the vanadium with Caro's acid to the pentavalent state and obtaining the oxidized vanadium by solvent extraction.... | 07/02/1985 |
| 4526603 | Method for manufacturing an opal borosilicate glass The dusting and segregation of the glass batch during the manufacture of opal borosilicate glass can be reduced by adding the phosphorus values to the glass batch as phosphoric acid, and calcium values as limestone, calcium carbonate or calcium oxide.... | 07/02/1985 |
| 4394361 | Method of purifying phosphoric acid An organic solvent system, for use in solvent extraction of wet process phosphoric acid, is a mixture of an organic phosphate ester and an essentially water-immiscible organic ketone or alcohol.... | 07/19/1983 |
| 4379132 | Process for sodium hypophosphite Either commercial yellow phosphorus or a phosphorus sludge is reacted with a slurry of calcium hydroxide in aqueous sodium hydroxide to form a sodium hypophosphite solution containing calcium and hydroxide ions. The solution is neutralized with phosphoric... | 04/05/1983 |
| 4377653 | Mixed ether compositions containing oligomers of polyfunctional phosphine oxides: flame retardants for polymers Mixed ether compositions containing oligomers of polyhydroxyalkyl phosphine oxide are prepared by heating a polyhydroxyalkyl phosphine oxide in the presence of an acid catalyst at temperatures within the range of from about 139° C. to about 200° C. and ... | 03/22/1983 |
| 4375456 | Method of producing sodium aluminum phosphate A method of spray drying 1-3-8 sodium aluminum phosphate reaction mixtures by the steps: (A) forming an aqueous 1-3-8 SALP reaction mixture by reacting Na2 CO3,Al(OH)3 and H3 PO4 in a Na:Al:PO4 ... | 03/01/1983 |
| 4374817 | Formulation of phosphate rock slurries The viscosity of phosphate rock slurries is reduced by incorporating in the slurry both sodium tripolyphosphate and an alkaline material, particularly sodium hydroxide. The combined amount of these two materials required to achieve a given viscosity reduc... | 02/22/1983 |
| 4370251 | Continuous process for the production of peroxycarboxylic acid compositions Peroxycarboxylic acid compositions containing stabilizing ingredients are produced by the hydrogen peroxide peroxidation of corresponding carboxylic acids which are not substantially soluble in water by a continuous process in which the peroxidation react... | 01/25/1983 |
| 4361487 | Control of hydrogen sulfide emission from geothermal steam plants with hydrogen peroxide and sodium vanadate Removing hydrogen sulfide from geothermal steam condensate is described whereby the hydrogen sulfide that is present in the condensate from a geothermal steam plant is oxidized with a peroxygen compound such as hydrogen peroxide in the presence of catalyt... | 11/30/1982 |
| 4348419 | Method for inhibiting the growth of Clostridium botulinum and the formation of enterotoxin in comminuted meat products and products thereof The growth of Clostridium botulinum and the production of enterotoxin in comminuted meat products is inhibited by adding to such products an effective amount of a compound selected from the group consisting of hypophosphorous acid and non-toxic salts ther... | 09/07/1982 |
| 4346236 | Method of oxidizing tertiary-alkyl phosphines Tertiary-alkyl phosphines, such as tris-(3-hydroxypropyl) phosphine may be oxidized by heating in the presence of water and between about 0.1 and about 10% by weight of an acid catalyst at a temperature above about 100° C.... | 08/24/1982 |
| 4341747 | Process of removing nitrogen oxides from gaseous mixtures Nitrogen oxides are removed from gaseous mixtures by treatment with an aqueous solution of nitric acid having a concentration by weight from about 35% to about 58% and containing by weight at least 0.001% but less than 25% of hydrogen peroxide whereby the... | 07/27/1982 |
| 4323437 | Treatment of brine Oxidizable impurities, particularly hydrogen sulfide and ammonia, are removed from sodium chloride brines used for the electrolytic production of chlorine and caustic soda by oxidizing such impurities with hypochlorite at pH values at which the brines are... | 04/06/1982 |
| 4320097 | Recovery of vanadium from acidic solutions thereof Vanadium is recovered from sulfuric acid leach liquor by oxidizing the vanadium with hydrogen peroxide in the presence of iron ions and extracting the oxidized vanadium with an amine solvent system.... | 03/16/1982 |
| 4315082 | Phosphorus compounds Compositions comprising organic phosphorus compounds having a peroxygen group which is either a hydroperoxyalkyl (H--OO--C--) group or a peroxyether (--C--OO--C--) group. There is at least one such group per 500 phosphorus atoms in the composition. These ... | 02/09/1982 |
| 4311681 | Method of regenerating phosphoric acid extraction solvent Organic phosphate solvents used in the extraction of phosphoric acid from impure phosphoric acid solutions, and from which the phosphoric acid has been stripped, are washed with an aqueous alkali orthophosphate solution to remove impurities, particularly ... | 01/19/1982 |
| 4294962 | Continuous process for the manufacture of cyanuric acid A highly-pure cyanuric acid is manufactured in a continuous process whereby urea and/or biuret are dissolved in an inert solvent and circulated at a high velocity and a temperature in the range of about 180° C. to about 250° C. through a loop between a ... | 10/13/1981 |
| 4289739 | Method of producing crystalline sodium aluminum phosphate In the production of SALP tetrahydrate wherein sodium carbonate and aluminum hydroxide are added to aqueous phosphoric acid, the viscous reactive mixture is agitated with water to free the SALP tetrahydrate crystals from the gelatinous matrix. The crystal... | 09/15/1981 |
| 4288293 | Form coke production with recovery of medium BTU gas In the fluidized carbonization and calcination of coal to form a reactive coal calcinate for admixture with bituminous binder for briquetting, curing, and coking to produce form coke, the improvement of recovering medium BTU gases in the overheads by usin... | 09/08/1981 |
| 4287119 | 3-Hydroxyalkyl phosphine oxide flame retardant compositions Thermoplastic polyphenylene oxide compositions such as polyphenylene oxide that has been modified with high impact polystyrene are rendered fire retardant by the addition of an effective amount of a 3-hydroxyalkyl phosphine oxide such as n-butyl bis(3-hyd... | 09/01/1981 |
| 4285915 | Recovery of alkali values from trona ore Alkali values are recovered in a cyclic method from mechanically mined trona ore or from trona deposits by a solution mining technique utilizing a solvent comprising an aqueous solution of sodium sulfide. The ore is solubilized as sodium carbonate which i... | 08/25/1981 |
| 4282359 | Purification of cyanuric acid Cyanuric acid is mechanically separated such as by filtration, centrifugation, or centrifugal filtration from a slurry of cyanuric acid, urea, biuret, and an inert solvent in which the urea is soluble at temperatures above about 170° C. to reduce the ure... | 08/04/1981 |
| 4282260 | Method for inhibiting the growth of Clostridium botulinum and the formation of enterotoxin in smoked meat products The growth of Clostridium botulinum and the production of enterotoxin in smoked meat products, such as bacon, is inhibited by adding to the meat products a compound selected from the group consisting of hypophosphorous acid and sodium potassium, calcium a... | 08/04/1981 |
| 4279764 | Encapsulated bleaches and methods of preparing them Bleaching compositions containing a chlorine bleaching agent coated with a silicate bound, hydrated, soluble salt containing an N--H chlorine accepting compound are described. Such compositions exhibit decreased localized dye attack of colored fabrics.... | 07/21/1981 |
| 4277507 | Method for inhibiting the growth of clostridium botulinum and the formation of enterotoxin in smoked fish products The growth of Clostridium botulinum and the production of enterotoxin in smoked fish is inhibited by adding to the fish a compound selected from the group consisting of hypophosphorous acid and sodium, potassium, calcium and manganese salts thereof. Such ... | 07/07/1981 |
| 4275202 | Production of a purified cyanuric acid dihydrate Anhydrous cyanuric acid containing amounts of occluded solvent is recrystallized to a purified cyanuric acid dihydrate by slurrying the contaminated anhydrous cyanuric acid in an aqueous medium.... | 06/23/1981 |
