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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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 ...
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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...
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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 ...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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WO/1989/000576A1 |
Non-hygroscopic, azithromycin (9-deoxo-9a-aza-9a-methyl-9a-homoerythromycin) dihydrate and a process therefor.
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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...
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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 ...
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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 ...
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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...
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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...
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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 ...
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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...
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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 ...
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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...
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WO/1985/004819A1 |
Free excess charge which is net unipolar is introduced, preferably by charge injection, into the continuous phase. The charge transfers, through the continuous phase, to the dispersed phase and an induced electric field is thereby set up...
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WO/1985/004818A1 |
Particles/droplets/bubbles forming a dispersion in a continuous fluid can be increased in size by conglomeration induced by introducing free excess charge which is net unipolar (for example, by charge injection) into a body of the disper...
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WO/1985/002781A1 |
A process of washing a crystal-mother liquor mixture to produce a mass of purified crystals in a purification zone containing two sets of sub-zones, respectively denoted as Type A sub-zones and Type B sub-zones, that are laid sequentiall...
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WO/1985/002783A1 |
An improved method and apparatus for filtration includes an outer stationary body (10), an inner rotating body (12) defining a gap with the outer body for receiving a fluid sample (14), the surface of one of the bodies defining the gap b...
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WO/1984/001569A1 |
Process for obtaining aluminium trihydroxide having a mean diameter controlled on demand, lower than 4 microns, of unimodal distribution and low dispersion, comprising the hot decomposition of a sodium aluminate supersaturated solution i...
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WO/1984/001568A1 |
Process for obtaining aluminium trihydroxide, of mean diameter adjusted on demand in the interval from 2 to 100 microns, of unimodal distribution and of low dispersion, comprising the hot decomposition of an supersaturated solution of so...
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WO/1984/000117A1 |
An apparatus for concentrating a suspension consisting of a hollow cylinder (1) in which one or more tubes (2) of a constant outward diameter extend in axial direction, in the wall of each tube at least one filter (3) being mounted formi...
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WO/1984/000118A1 |
A method and apparatus for treating in counter current of suspended particles with a liquid, whereby the particles and the liquid are tranferred in opposite directions through a contact zone (1) which, at some places, spaced in axial dir...
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WO/1983/001010A1 |
An apparatus for and method of preparing a slurry for a purification apparatus such as a wash column. A slurry is produced in a crystallizer. The crystals are essentially removed from the concentrated mixture and transported to a more di...
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WO/1983/001011A1 |
A liquid purification system which removes impurities from liquids, such as salt from water. The system as depicted, for example, in Fig. 2, includes operationally interconnected vaporization means (22), condensing means (23) and heat ex...
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WO/1982/000459A1 |
The purification method of polluted water by dissolved materials which are separable through crystallization, consists in circulating the solution in a heat exchanger where the vaporization temperature is reached, in feeding the solution...
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WO/1982/000417A1 |
An activator for initiating crystallisation of a supercooled salt solution comprises a thin trigger (14) of sheet metal having two configurations between which it is bendable with snap-displacement. The trigger (14) has multiple pin-hole...
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WO/1981/003016A1 |
The essential feature of the process according to the invention lies in that solid crystalline matters, respectively precipitates are gained from the solution by means of chemical reactions, in such a manner, that at least one of the com...
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WO/1979/001052A1 |
A method for preventing fouling in apparatus used to separate a solvent from a solute which includes a semi-permeable membrane barrier is disclosed. The method comprises providing a quantity of nucleation crystals in the fluid stream pas...
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JP7476498B2 |
To provide a solid, high-purity cyclic compound or a derivative thereof, a production method capable of producing the cyclic compound or the derivative thereof at a high yield, and a high-quality chemical.A production method of a cyclic ...
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JP2024046965A |
The present invention provides a method for producing microparticles of a metal compound that have high sphericity, a high nickel content of 90% or more in terms of substance amount, and an average particle diameter d50 of 3 μm or less....
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JP2024047578A |
The present invention provides an apparatus for producing microparticles of a metal compound having high sphericity, a high nickel content of 90% or more in terms of substance amount ratio, and an average particle diameter d50 of 3 μm o...
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JP2024031636A |
An object of the present invention is to provide a technology for accurately estimating the concentration of a continuous process involving precipitation. A concentration estimation method according to an aspect of the present disclosure...
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JP7439756B2 |
A precipitation system for precipitating the target component is provided. The precipitation system includes: a reverse osmosis module; a precipitation device; a membrane separation device that includes a semipermeable membrane module in...
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JP7430256B2 |
Provided are a continuous post-treatment method and device for a penem compound. The method includes the following steps: S1, performing continuous extraction on a reaction crude product of a penem compound, to obtain an extraction heavy...
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JP2024007310A |
An object of the present invention is to provide a method for purifying recovered ε-caprolactam in which the loss rate of recovered ε-caprolactam is sufficiently low even though crystallization is performed in an aqueous solvent. [Solu...
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JP2023184469A |
To provide a technique that produces high-quality terephthalic acid by readily and efficiently removing colorants as a byproduct during the chemical recycling of terephthalic acid-based polyester containing colorants.A method for produci...
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