|
Match
|
Document |
Document Title |
|
|
7540884 |
Method for performing the purifying separation of crystals out their suspension in a mother liquor
A process for purifying removal of crystals from their suspension in mother liquor by means of a washing column having forced transport in which the process chamber is encased by a metal wall...
|
|
|
7531023 |
Method for the purification of a molten metal
The invention relates to a method for the purification of a molten metal containing one or more foreign elements. The molten metal is cooled to a eutectic temperature to simultaneously form...
|
|
|
7150766 |
Method of particle formation
The invention provides a method for forming particles of a target substance, comprising (a) co-introducing into a particle formation vessel, under controlled temperature and pressure, a...
|
|
|
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...
|
|
|
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...
|
|
|
6558434 |
Method for cooling by altering crystal field interaction
A method for cooling is provided which makes use of materials which undergo a pressure induced structural phase transition such that the material's crystal field interaction changes, and which...
|
|
|
6428583 |
Separation process
A crystallization process is described for separating a desired substance from an aggregate mixture in which an emulsion of droplets in a continuous phase containing the aggregate mixture is formed...
|
|
|
6364914 |
Method of crystallization with the particle size distribution being controlled
Herein is disclosed a method of crystallization with the particle size distribution being controlled, characterized in that while crystals are being precipitated by vacuum concentration...
|
|
|
6180074 |
Method for processing flue gases containing sulphur oxides
|
|
|
6103139 |
Single-use encapsulated hot pack activator
An activator (10) made in accordance with the principles of the present invention includes activating crystals (11) that have been formed into a shape and then coated with coating (12). The...
|
|
|
5755975 |
Separation of substances from a liquid mixture by crystallization
In a process for separating substances from a liquid mixture by crystallization in a crystallizer, a two-phase seed layer in the form of a melt or solution of the mixture to be separated, with...
|
|
|
5614104 |
Process and apparatus for the continuous determination of the sylvine saturation of hot solutions for monitoring and controlling the hot solubilizing of a crude potash salt
Process for determining the sylvine saturation in which the salt concentration in the solid matter-free crude solution through temperature determination at a temperature T M >T, and...
|
|
|
5505924 |
Multistage countercurrent recrystallization process and apparatus for performing same
A multistage process for the separation and purification of a desired crystalline material by repeated dissolution and recrystallization, wherein crystals and solvent move countercurrent to one...
|
|
|
5448005 |
Crystallization of paraxlene from high purity paraxylene feeds
This invention is a crystallization process for p-xylene recovery. A single temperature crystallization production stage is used for producing p-xylene from a feed having an above equilibrium...
|
|
|
5447542 |
Process for separating and purifying substances by crystallization from the melt
In the process for separating and purifying substances by crystallization from the melt under pressure, the melt is subjected to pressure under an inert gas atmosphere and then cooled, whereupon it...
|
|
|
5435919 |
Optically-active, amhiphilic, water-soluble free-radical addition copolymers and their use in the resolution of racemic mixtures
Optically-active, amphiphilic, free-radical addition copolymers having an optically-active hydrophobic portion and an ionic hydrophilic portion are effective resolving agents. This utility is based...
|
|
|
5433932 |
Process to recover azide values from azide-based gas generating materials
In a process for recovering an alkali metal azide from a waste gas generating material containing the alkali metal azide and a metal oxide reactable with the azide, the gas generating material is...
|
|
|
5332674 |
Process for preparing (R) and (S)-1,2-isopropylideneglycerol by crystallizing racemic benzoyl ester
A process is described for separating the optical isomers of 1,2-isopropylideneglycerol, of formula (I), comprising partially stereoselective enzymatic hydrolysis of 1,2-isopropylideneglycerol...
|
|
|
5154805 |
Method of preparing chlorate
The invention discloses a method in the electrolytic production of alkali metal chlorate which is recovered by crystallization and separation of the crystals from a solution recycled to the...
|
|
|
5090965 |
Process for the separation of substances by cooling crystallization
In the process for the separation of substances by cooling crystallization, the mixture remaining in the crystallizer after separation of the crystal layer is removed and the crystal layer is...
|
|
|
5084260 |
Method for producing pure boric acid
Pure boric acid is obtained by a high-yield method with a non-pollutant effluent discharge, comprising the following stages carried out in succession: a) dissolving impure boric acid in an...
|
|
|
5062862 |
Process and apparatus for recovering a pure substance from a liquid mixture by crystallization
The invention relates to a crystallization process for recovering a pure substance from a liquid mixture, a starting mixture being cooled down in a crystallization zone to form a crystal suspension...
|
|
|
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...
|
|
|
4956157 |
Process for separating salts in seawater
A process for obtaining available elements from seawater is described, which process includes two separation steps. The first separation step involved adjusting the pH of seawater to a low pH by...
|
|
|
4938934 |
Recovery of cesium chloride from pollucite ore
A process for recovering purified cesium chloride from a cesium aluminum silicate ore in which the ore is digested with aqueous hydrochloric acid and the silica solids removed to obtain an aqueous...
|
|
|
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...
|
|
|
4727218 |
Procedure and means for separating or purifying organic substances
Method and apparatus for separating and/or purifying a substance from a molten mixture by crystallization, in which the molten mixture is conducted into an annular space defined by two...
|
|
|
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...
|
|
|
4690725 |
Purification of Cd and Te by zone refining
Cd and Te are purified by multiple-pass zone refining in the presence of a small amount of an added gettering substance chosen from Cd, Te and CdTe. In the purification of Cd, Te, or CdTe is added,...
|
|
|
4685935 |
Process for producing pure magnesium sulphite
A process for producing a pure magnesium sulphite from crude crystalline magnesium sulphite. Into a full suspension or flow containing magnesium sulphite crystals at least one further...
|
|
|
4666456 |
Process for the continuous partial crystallization and the separation of a liquid mixture
Process for continuous crystallization of a liquid mixture in which the mixture is led through a cascade of cooling sections. The temperature in the first section is such that a part of the mixture...
|
|
|
4650658 |
Stable crystals of sodium bromite trihydrate
NaBrO 2 .3H 2 O crystals with excellent storage stability which contain at least 30 wt. % of NaBrO 2 .3H 2 O and 0.5-5.0 wt. % of NaOH. The crystals are produced by precipitation from NaBrO 2 ...
|
|
|
4632809 |
Apparatus for the crystallization/separation of material mixtures
A crystallization/separation apparatus is disclosed for material mixtures having vertical crystallization column, cooling and heating devices, feeding-in and withdrawal connections, pumps, valves,...
|
|
|
4590058 |
Process for producing high purity solutions of alkali metal hydrosulfites
High purity solutions of alkali metal hydrosulfites having low concentrations of alkali metal thiosulfates are produced in a process which comprises feeding an alcohol-free aqueous solution of an...
|
|
|
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...
|
|
|
4472361 |
Method of recovering alumina values from a starting solid mixture comprising AlCl.sub.3 and NaCl
A starting solid mixture of AlCl 3 and Nacl, which may have been obtained by acid leaching of an aluminiferous mineral and precipitation of the AlCl 3 and NaCl, is mixed with water in an amount...
|
|
|
4451383 |
Recyclable hot pad
A liquid melt becomes converted to crystalline form at a particular temperature either spontaneously or when artificially nucleated. The liquid releases heat at crystallization. If the liquid is in...
|
|
|
4417912 |
Method of producing crystallized glass from phosphate glass
A phosphate glass such as calcium metaphosphate (Ca(PO 4 ) 2 ) is heat-treated in a temperature gradient to obtain a crystallized glass (glass-ceramics) made of oriented fiber like crystals which...
|
|
|
4401531 |
Process for the production of electrolytic zinc or high purity zinc salts from secondary zinc raw-materials
The present invention relates to a process for the production of either electrolytic zinc or high purity zinc salts from secondary zinc raw materials which comprises: leaching said raw material in...
|
|
|
4312849 |
Phosphorous removal in silicon purification
A method of removing phosphorous impurity in a process for purifying silicon wherein silicon is crystallized from a solvent metal is disclosed. The method comprises the steps of providing a molten...
|
|
|
4312848 |
Boron removal in silicon purification
A method of removing boron impurity in a process for purifying silicon is disclosed wherein silicon is crystallized from a solvent metal. The method comprises the steps of providing a molten body...
|
|
|
4312847 |
Silicon purification system
A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material and extracting heat therefrom to provide a solid phase containing silicon in crystal form and...
|
|
|
4312846 |
Method of silicon purification
A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material in a vessel having an upwardly removable first bottom therein and extracting heat therefrom to...
|
|
|
4298423 |
Method of purifying silicon
A method of purifying silicon, in which the silicon is heated to a molten state, contacted with a gas inert to silicon to remove impurities, and thereafter cooled to a solid state.
|
|
|
4292487 |
Method for initiating the float zone melting of semiconductors
An improved method for initiating the inductive heating of semiconductors in the float zone refining process in which the oscillator circuit generating the required radio frequency energy is...
|
|
|
4292119 |
Growth of single-crystal 2PbO.Fe.sub.2 O.sub.3
Single crystal 2PbO.Fe 2 O 3 is grown from a fluxed melt having a selected concentration ratio of boron oxide to lead oxide and a selected concentration of iron oxide sufficient to cause 2PbO.Fe...
|
|
|
4292043 |
Process for working up effluent containing ammonium sulphate
A process for the working up of ammonium sulphate-containing effluent which is contaminated with organic compounds and optionally also ammonium nitrate, comprising evaporating the effluent to...
|
|
|
4256717 |
Silicon purification method
A method for purifying silicon comprises the steps of providing a body of molten silicon-rich material and extracting heat therefrom to provide a solid phase containing silicon in crystal form and...
|
|
|
4256463 |
Preparation of zirconium oxychloride
A method of crystallizing zirconium or hafnium oxychloride to remove metallic impurities and phosphorus by maintaining the normality of the mother liquor in which the zirconium or hafnium...
|
|
|
4247528 |
Method for producing solar-cell-grade silicon
Silica is reduced in a direct arc reactor by activated carbon or carbon black having relatively low boron (B) and phosphorus (P) contents to produce silicon having similarly low B and P contents...
|