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Patent Searching and Data


Matches 651 - 700 out of 4,532

Document Document Title
WO/1995/030466A1
A process and device are disclosed for separating substances by crystallization of molten material. In order to bring about crystallization, the molten material is fed into the gap between two opposing moving walls which can be cooled; t...  
WO/1995/030478A1
Wash columns as used to remove impurities from the residual melt from melt crystallization are of limited efficiency due to the fact that the crystal mass normally fed in contains solids of different sizes, which partially also tend to a...  
WO/1995/026947A1
This invention is a crystallization process for p-xylene recovery. A single temperature crystallization stage (18) is used for producing p-xylene from a feed having an above equilibrium p-xylene concentration, such as from toluene dispro...  
WO/1995/026931A1
An installation for the targeted formation of germs or crystals on the surface of a dielectric in contact with a solution, especially on the functional groups of a polymer, in which there is a device for generating an electric field in t...  
WO/1995/018086A1
A method for recovering crystalline 2-6-dimethylnaphthalene comprising crystallizing in a scraped-wall crystallizer apparatus at crystallization temperature T, a mixture of low melting components (LM), having melting points of 70 �F an...  
WO/1995/013132A1
A method for providing aerogels, and aerogels produced according to the method, is described. As one aspect, antiperspirant compounds that are in aerogel form, and antiperspirant and deodorant compositions including such salts, are descr...  
WO1995004123A3  
WO/1995/004583A1
Methods and reaction systems are disclosed that are adapted for forming crystallites having novel crystal habits and/or morphologies compared to conventional crystallites of the same chemical composition. The methods and reaction systems...  
WO/1995/004123A2
Triglyceride oil crystallisation modifying substance being membrane lipids which are comprised by the groups (I) lipids having the formula C13H27-CH=CH-CH(OH)-CH(NHCOR2)-CH2-OR4, C13H27- is an unbranched alkyl chain, R4 is hydrogen or R3...  
WO/1994/022546A1
A method and a device for recovering crystals from a solution by evaporation with crystallisation in an evaporation plant having at least two stages are disclosed. In the method, the crystallised salt is separated in each evaporation sta...  
WO/1994/019083A1
This invention provides a process for preparing high purity and large size crystals by eliminating fine crystals in crystal slurry in a crystallizer, characterized in: mounting two filters (4, 6) in the crystallizer (5); discharging part...  
WO/1994/019082A1
A slurry containing crystals in an impurity-containing mother liquor under elevated pressure and temperature conditions is processed to separate the crystals from the mother liquor. The processing comprises highly efficient separation an...  
WO/1994/016362A1
The present invention is directed to a method for the recovery of erythorbates from photographic solutions. In the disclosed method, the photographic solution is first acidified by passing it over an acidic cation exchange resin and the ...  
WO/1994/013630A1
A process for obtaining carbamide involves synthesizing carbamide from initial components and crystallizing the resulting aqueous solution of carbamide until the supersaturation temperature of the solution is reached while simultaneously...  
WO/1994/012460A1
A process is disclosed for the production of a product which is enriched in a desired enantiomer of a phenylpropionic acid selected from ibuprofen and flurbiprofen, or their pharmaceutically acceptable salts, which comprises the followin...  
WO/1994/007582A1
There is disclosed a dual jet crystallizer apparatus comprising a crystallization or mixing chamber (10) having opposed angularly disposed arms (11) which removably receive jet nozzles (13). One end of the chamber is provided with means ...  
WO/1994/002453A1
(S)-N5-[Imino(methylamino)methyl]ornithine hydrochloride, pharmaceutical compositions containing it, its us in medicine and its preparation is described.  
WO/1993/024441A1
A process for the production of purified terephthalic acid (PTA) from crude terephthalic acid (CTA) comprising mixing the CTA with an aqueous medium to form an aqueous CTA mixture, heating the mixture to dissolve substantially all of the...  
WO/1993/019826A1
In a continuous crystallization process employing an evaporative draft tube baffle (DTB) crystallizer apparatus to produce crystal product, the improvement which is feeding at constant rate to the body of slurry a suspension of crystals ...  
WO/1993/018359A1
In this system, an absorption solution consisting of a common salt and water is circulated through the Immediate Heat Upgrading Absorption (IHUA) air handlers (1a, 1b, 1c, 1d) to upgrade heat taken from a first air mass or water and rele...  
WO/1993/006065A1
Described are a method and a device for reducing the grain size of crystalline explosive. The coarse-crystalline explosive is first dissolved in an organic solvent. The dissolved explosive is subsequently transferred to a precipitation v...  
WO/1992/020420A1
The invention provides a method of solidifying a liquid including the steps of reducing the temperature of the liquid below its melting point and subjecting the liquid to a physical disturbance, preferably irradiating the undercooled or ...  
WO/1992/020760A1
Waxy liquid hydrocarbons can be dewaxed employing autorefrigerative dewaxing solvents such as C2-C4 aliphatic hydrocarbon solvents, preferably propane, propylene, butane, butylene, and mixtures thereof, by using a centrifuge (3) as the d...  
WO/1992/012392A1
The invention described is an apparatus for heating or cooling solid suspension slurry. The apparatus comprises a vessel (1) for containing the slurry and a draft means contained within a draft section of a draft tube (2) to circulate an...  
WO/1992/004429A1
A process for separating undesired foreign substances from vegetable, animal and maritime oils and fats. During refining or fractionated crystallisation, an electrostatic field is generated in the oil to be treated by means of at least o...  
WO/1992/000130A1
A method and an apparatus for crystallizing a mineral substance in a fluidized bed of crystals (14) generated by circulating a supersaturated solution of the substance to be crystallized upwards through a fluidized bed reactor distributo...  
WO/1991/013301A1
This invention introduces an absorption vapor pressure enhancement operation. In the process, a mass of solvent vapor is absorbed into an absorbing solution under a first pressure and an equivalent amount of second vapor is produced unde...  
WO/1991/013300A1
A Multiple Phase Transformation Absorption Melting Process (MPTAM Process) comprises a step of subjecting a feed solution to simultaneous vaporization and freezing operation, denoted as multiple phase transformation operation, to thereby...  
WO/1991/006682A1
In the horizontal-throughput sugar-crystallization equipment used in the process of the invention, the individual digester chambers are separated by partition walls whose upper edges extend into the vapour space, and the zones in which c...  
WO/1991/004777A1
A crystal refining apparatus of a vertical type, wherein a plurality of screw vanes are provided, the screw vanes have crystal refining tubes rotating in directions opposite to each other, and contained solid crystalline materials are re...  
WO/1991/001785A1
An evaporator in the form of a vacuum pan has partitions (38) providing a plurality of compartments (42, 46) between an inlet and outlet. The compartments increase in volume from the inlet to the outlet, each compartment having at least ...  
WO/1990/010838A1
A new vacuum freezing separation process entitled ''Vacuum Freezing Ambient Pressure Melting (VFAPM) Process'' and a new apparatus entitled ''Sub-Triple Point Vapor Processing Unit'' for generating and liquefying a sub-triple point vapor...  
WO/1990/003208A1
A method of freezing and separation for concentrating solutions, such as waste waters of the process industry, by means of waste heat of the same process, by freezing the solution in a crystallizer (10) operating at the triple point, by ...  
WO/1990/001978A1
A process and apparatus for superpurifying crystallizable substances to a purity level of 99.999 percent by a multistage freezing procedure comprising a melted crystal receiver stage (24a, 24b, 24c, 24d); a crystallization processor stag...  
WO/1989/011897A1
A method for producing oriented diamond films on a substrate. Diamond seed crystals are suspended in a slurry (1) and applied to the substrate surface (2). Heating (3) the substrate removes the slurry fluid and produces seed crystals who...  
WO/1989/011319A1
The aqueous liquid is conveyed through a pipe (3) by means of a longitudinal conveyor (4) in a continuous process during which it is first chilled in a cooling region (6) until the water turns to ice. The liquid containing the ice crysta...  
WO/1989/011323A1
The invention relates to a process for efficiently recovering crystals from slurry for a long time by feeding a slurry to a rotary vacuum filter, filtering with suction while rotating a cylindrical filtering member, washing and again fil...  
WO/1989/010175A1
The invention is a method with equipments for conducting the soli-liquid-vapor multiple phase transformation steps of vacuum freezing, wet distillative freezing, vacuum crystallization and primary refrigerant eutectic freezing. All proce...  
WO/1989/010520A1
A triggering device (15) for use in combination with a triggerable thermal energy storage medium (13) within a flexible cover (11). Triggering device (15) is a closed turn stiff helical metallic spring and of sufficient length to be forc...  
WO/1989/003364A1
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 saturated solution of the salt subjected to agi...  
WO/1989/000576A1
Non-hygroscopic, azithromycin (9-deoxo-9a-aza-9a-methyl-9a-homoerythromycin) dihydrate and a process therefor.  
WO/1988/005766A1
This process uses a starting material with a minimum p-xylol content of 99 %. The starting material is introduced in the liquid state into an inert liquid, preferably water, the temperature of which is lower than the melting point of pur...  
WO/1988/004568A1
An apparatus (a) for purifying water by removing polluted clinging water from ice crystals, or (b) if desired, for concentrating fruit juices or the like. The complete apparatus includes a source (7 or 15) of small, individual pieces of ...  
WO/1988/001192A1
A method and apparatus for concentrating multicomponent liquid product containing volatile and non-volatile constituents, comprising mixing liquid product with liquid refrigerant gas (21) in a freezing chamber (3), removing ice crystals ...  
WO/1987/005095A1
A trigger (20) to activate a supercoolable aqueous salt solution (22) wherein the trigger and solution are encased within a flexible container (24). The trigger is a flexible relatively thin sheet of material wherein there are a pluralit...  
WO/1987/004778A1
The primary refrigerant eutectic freezing (PREUF) process is designed to separate mixtures containing at least one volatile component and two or more crystal-forming components (1). Heat is removed from a eutectic mixture at near its eut...  
WO/1987/001605A1
This invention, which can be industrially practiced, relates to a high-pressure crystallizer, which enables a pressure crystallization method using a pressure as a variable, and which is used to promote the industrial practicing of this ...  
WO/1986/006977A1
A process and device for multiple-phase processing of an aqueous liquid, in which a pre-cooled (151) aqueous liquid (38') is converted into frazil ice under triple point conditions, by injection into a condensation chamber (1) with a par...  
WO/1986/000025A1
A method of removing materials in solid form from solution in a solvent comprising the steps of collecting the solution in a deposition vessel, injecting directly into the solution in the vessel a liquid refrigerant material whereby the ...  
WO/1985/005284A1
Distillative freezing process is an energy conserving process for separating mixtures and superpurifying chemicals. The wet and dry distallative freezing process disclosed represents a major improvement to the distillative freezing techn...  

Matches 651 - 700 out of 4,532