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79results about How to "Avoid insufficient purity" patented technology

Synthesis of tyrosine derived diphenol monomers

A method for preparing diphenol compounds, which method includes the steps of coupling a hydroxyphenyl carboxylic acid with a L-tyrosine ester in a water-miscible organic reaction solvent containing a carbodiimide capable of forming a water-solvent urea by-product, thereby forming a diphenol reaction product; and combining the reaction mixture with an amount of water effective to precipitate the diphenol as a water-immiscible organic phase, so that a water-immiscible organic phase is formed containing the diphenol reaction product. New diphenol monomers and polymers polymerized therefrom are also disclosed.
Owner:RUTGERS THE STATE UNIV

Synthesis of tyrosine-derived diphenol monomers

A method for preparing diphenol compounds, which method includes the steps of coupling a hydroxyphenyl carboxylic acid with a L-tyrosine ester in a water-miscible organic reaction solvent containing a carbodiimide capable of forming a water-soluble urea by-product, thereby forming a diphenol reaction product; and combining the reaction mixture with an amount of water effective to precipitate the diphenol as a water-immiscible organic phase, so that a water-immiscible organic phase is formed containing the diphenol reaction product. New diphenol monomers and polymers polymerized therefrom are also discussed.
Owner:RUTGERS UNIVERSITY

Process for the Production of Carbon Graphenes and other Nanomaterials

Process for producing nanomaterials such as graphenes, graphene composites, magnesium oxide, magnesium hydroxides and other nanomaterials by high heat vaporization and rapid cooling. In some of the preferred embodiments, the high heat is produced by an oxidation-reduction reaction of carbon dioxide and magnesium as the primary reactants, although additional materials such as reaction catalysts, control agents, or composite materials can be included in the reaction, if desired. The reaction also produces nanomaterials from a variety of other input materials, and by varying the process parameters, the type and morphology of the carbon nanoproducts and other nanoproducts can be controlled. The reaction products include novel nanocrystals of MgO (percilase) and MgAl2O4 (spinels) as well as composites of these nanocrystals with multiple layers of graphene deposited on or intercalated with them.
Owner:GRAPHENE TECH

Method for purifying carbon dioxide

The invention is a method for the decontamination of CO2 to a sufficient level of purity to allow it to be used in the semiconductor industry. The invention comprises the exposure of fluid CO2 to a combination metallic states of at least one metal under the appropriate conditions for removal of contaminants. The adsorbents are then decontaminated / activated to return the adsorbent to a mixed oxidation state and allow further rounds of decontamination. The adsorbents are selected to be complimentary to each other, preferentially adsorbing different contaminants. Additionally, the adsorbents are selected to undergo reduction differently such that upon regeneration only a portion of the metals are reduced and the adsorbent is returned essentially to its original state.
Owner:ENTEGRIS INC

Export and modification of (poly)peptides in the lantibiotic way

The invention includes a method for harvesting a polypeptide produced by a host cell, wherein the polypeptide has not undergone intracellular posttranslational modification, such as dehydration of a serine or a threonine, and / or thioether bridge formation. The invention also includes a method for producing thioether-containing peptides and dehydroalanine / dehydrobutyrine-containing.peptides, wherein thioether rings may be formed extracellularly.
Owner:APPLIED NANOSYST

Process for mutual separation of platinum group metals

A process for mutual separation of platinum group metals (PGM), wherein highly stable compounds and steps are used to efficiently remove impurity elements while preventing increase of impurity content relative to that of the PGM in the mother liquor and also preventing decomposition of a chloro complex, and palladium, platinum, iridium, ruthenium and rhodium are separated mutually in such a way that each of the separated PGM has a sufficient purity to be a commercial product. A process for mutual separation of PGM, comprising the first step for leaching a raw material containing PGM and impurity elements, second step for removing the impurity elements from the leach liquor by solvent extraction, third step for recovering palladium from the raffinate, fourth step for removing cationic impurity elements from the raffinate by solvent extraction, fifth step for recovering platinum from the raffinate by hydrolysis, sixth step for recovering ruthenium from the precipitate by leaching, and seventh step for recovering iridium by solvent extraction to prepare the stripping liquor containing iridium and raffinate containing rhodium.
Owner:SUMITOMO METAL MINING CO LTD

Carbazolyl-substituted ethanolamines as selective beta -3 agonists

PCT No. PCT / US97 / 15230 Sec. 371 Date May 4, 1998 Sec. 102(e) Date May 4, 1998 PCT Filed Aug. 28, 1997 PCT Pub. No. WO98 / 09625 PCT Pub. Date Mar. 12, 1998Disclosed herein are selective beta 3 adrenergic agonists represented by the following structural formula: The variables in the structural formula shown above are defined in the specification. Also disclosed are methods of using these compounds for agonizing the beta 3 adrenergic receptor in patients in need of such treatment, for example, patients in need of treatment for obesity or Type II diabetes.
Owner:ELI LILLY & CO

Methods and compositions for preparation of biological samples

Methods and compositions for preparation of biological samples are disclosed. The methods include a prelysis step and a lysis step to make the cellular DNA available for further processing, amplification or analysis. The prelysis step includes the addition of a prelysis reagent to the cells. The prelysis reagent may include an enzyme to facilitate the disruption of the cells. The lysis step includes the addition of a lysis reagent to at least a portion of the prelysis reagent and cells.
Owner:ACCESS GENETICS

Low loss optical fiber and method for making same

A method of forming an alkali metal oxide-doped optical fiber by diffusing an alkali metal into a surface of a glass article is disclosed. The silica glass article may be in the form of a tube or a rod, or a collection of tubes or rods. The silica glass article containing the alkali metal, and impurities that may have been unintentionally diffused into the glass article, is etched to a depth sufficient to remove the impurities. The silica glass article may be further processed to form a complete optical fiber preform. The preform, when drawn into an optical fiber, exhibits a low attenuation.
Owner:CORNING INC

Cell processing and/or enrichment methods

The present invention relates to methods of processing and / or enriching cells from a pregnant female. More particularly the invention provides methods for processing and / or enriching fetal cells from a pregnant female. The enriched fetal cells can be used in a variety of procedures including, detection of a trait of interest such as a disease trait, or a genetic predisposition thereto, gender typing and parentage testing.
Owner:GENETIC TECHNOLOGIES LIMTIED

Method for Synthesizing Pirfenidone

A process for synthesizing pirfenidone from bromobenzene having less than about 0.15% by weight dibromobenze is disclosed. Also disclosed are processes of synthesizing pirfenidone without using ethyl acetate or n-butanol, and pirfenidone having controlled levels of ethyl acetate, n-butanol, di(5-methyl-2-pyridinone)benzenes, and other impurities having specified retention times. Also disclosed are formulated dosage forms including the disclosed pirfenidone.
Owner:ZACH SYST SPA +2

Method and equipment for purifying an extraction solution from aqueous entrainment and impurities

The invention relates to a method and equipment with which an organic solution extraction solution is purified from entrainment of aqueous solution and impurities during hydrometallurgical liquid-liquid extraction. The method treats an organic extraction solution, which is loaded with a valuable metal or valuable substance from the aqueous solution. The purpose is to carry out the physical separation of water droplets and the chemical removal of impurities from the organic extraction solution simultaneously.
Owner:OUTOTEC OYJ

Polyvinylidene fluoride preparation method

The present invention relates to a polyvinylidene fluoride preparation method, which comprises: introducing an acyl halide solution dispersed in a fluorine-containing organic solvent into a reaction kettle, adding a mixed solution comprising an inorganic alkali solution and hydrogen peroxide, carrying out a stirring reaction for 30-120 min at a temperature of -10-10 DEG C, carrying out in situ synthesis to obtain an initiator, introducing an aqueous solution of a dispersing agent, a vinylidene fluoride monomer and a chain transfer agent, carrying out a stirring reaction for 4-12 h at a temperature of 10-30 DEG C to prepare polyvinylidene fluoride, and carrying out filtering, washing, drying and crushing after completing the reaction to obtain the powdery product which is polyvinylidene fluoride resin powder. The powdery polyvinylidene fluoride resin has characteristics of good thermal stability, good physical property, good mechanical property, simple reaction process and easy control, and is suitable for industrial production.
Owner:DONGGUAN DONGYANG SOLAR SCI RES & DEV CO LTD

Method and Device for Non-Invasive Prenatal Diagnosis

ActiveUS20100196897A1High level of reliabilityEasily automatableBioreactor/fermenter combinationsBiological substance pretreatmentsGenetic analysisNon invasive
Method for non-invasive prenatal diagnosis comprising the following steps: a. obtain a sample of an organic fluid having a high probability of containing foetal cells from a pregnant woman; b. enrich said sample of organic fluid in at least one population of cells comprising at least one type of foetal nucleated cells; c. isolate at least one cell from among said at least one type of foetal nucleated cells; d. perform a genetic analysis on said at least one cell isolated from among said at least one type of foetal nucleated cells in order to highlight at least one genetic characteristic of said at least one foetal nucleated cell suitable for permitting said diagnosis; wherein the step of isolating at least one cell from among said at least one type of foetal nucleated cells is performed by individually selecting single cells in a microfluidic device designed for said purpose.
Owner:MENARINI SILICON BIOSYSTEMS SPA

Nanomaterials and Process for Making the Same

Process for producing nanomaterials such as graphenes, graphene composites, magnesium oxide, magnesium hydroxides and other nanomaterials by high heat vaporization and rapid cooling. In some of the preferred embodiments, the high heat is produced by an oxidation-reduction reaction of carbon dioxide and magnesium as the primary reactants, although additional materials such as reaction catalysts, control agents, or composite materials can be included in the reaction, if desired. The reaction also produces nanomaterials from a variety of other input materials, and by varying the process parameters, the type and morphology of the carbon nanoproducts and other nanoproducts can be controlled. The reaction products include novel nanocrystals of MgO (percilase) and MgAl2O4 (spinels) as well as composites of these nanocrystals with multiple layers of graphene deposited on or intercalated with them.
Owner:GRAPHENE TECH

Kit for radiolabeling ligands with yttrium-90

Methods and kits for radiolabeling proteins, peptides and ligands with radiolytic isotopes, particularly yttrium-90, are disclosed, whereby sufficient purity, specific activity and binding affinity are achieved such that the radiolabeled protein may be directly administered to a patient without further column purification. Such kits and methods will be particularly useful in bringing radioimmunotherapy to the hospital and outpatient setting for the treatment of cancer.
Owner:RIT ONCOLOGY

Method for producing organic peroxides and their use in the radical polymerization of monomers

A process for producing organic peroxide initiators useful in the polymerization of ethylenically unsaturated monomers. The process for making the organic peroxides includes forming an aqueous emulsion of the organic peroxide. The organic peroxide is dispersed as small droplets of from 1 to 10 microns in size in the aqueous emulsion. The organic peroxide may be added to a polymerization reactor containing an ethylenically unsaturated monomer. The organic peroxide functions as a free radical initiator to polymerize the monomer. The organic peroxide may be substantially free of organic solvents and plasticizers. The resulting polymers are of high quality.
Owner:OXY VINYLS LP

Processes for the Isomerization of Normal Butane to Isobutane

ActiveUS20090069617A1Reduce reboiler dutyReduce diameter and numberHydrocarbon by isomerisationHydrocarbon by hydrogenationBoiling pointPermselective membrane
In a normal butane isomerization process where the isomerization effluent (108, 114) is fractionated in a deisobutanizer (116) operated such that a lower boiling fraction (118) is provided containing at least 80 mass-% isobutane and a higher boiling fraction (122) containing normal butane and at least 10 mass-% isobutane. The higher boiling fraction (122) is contacted with a selectively permeable membrane (124) to provide a permeate (126) containing normal butane-containing and a retentate (128) containing at least 80 mass-% isobutane. The preferred membranes are sieving membranes having a C4 Permeate Flow Index of at least 0.01 and a C4 Permeate Flow Ratio of at least 1.25:1.
Owner:UOP LLC
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