Class / Patent application number | Description | Number of patent applications / Date published |
549541000 | Purification or recovery | 18 |
20090018355 | Process for Crystallizing an Epoxy Compound - A process for crystallizing an epoxy compound, which comprises the steps of: | 01-15-2009 |
20100029962 | Alkylene oxide purification systems - Embodiments of the present disclosure provide processes, columns, and systems for removing acetaldehyde from alkylene oxide in a feed stream and for providing an alkylene oxide-water stream that can be directly transferred to a glycol reaction process. The alkylene oxide purification column includes a first section to convert a feed stream into a gas phase portion and a liquid phase portion and a second section located in the column above the first section to separate alkylene oxide from the acetaldehyde, water, and other impurities that enter the second section from the first section. | 02-04-2010 |
20100029963 | Alkylene oxide recovery systems - The invention relates to improved systems for recovery of alkylene oxide from feed streams containing the same in an alkylene oxide recovery column. The invention also relates to improved processes for recovery of alkylene oxide from feed streams containing the same in an alkylene oxide recovery column. | 02-04-2010 |
20100063306 | Alkylene oxide recovery systems - Systems and processes for recovering alkylene oxide, including an alkylene oxide recovery column including a stripping section located in the column to convert a portion of a feed stream to a gas phase including alkylene oxide; a reabsorption section in the column above the stripping section including a water stream to reabsorb the alkylene oxide in the gas phase portion and to produce an aqueous solution, a first stripping gas to strip carbon dioxide and oxygen from the aqueous solution by converting a portion of the aqueous solution to a gaseous portion, producing an alkylene oxide stream, and a side take-off located at a bottom portion of the reabsorption section for removal of the alkylene oxide stream; a condenser to partially condense the gas phase portion; and a top take-off for removal of a light impurity fraction. | 03-11-2010 |
20100094032 | PRODUCTION OF ETHYLENE OXIDE - Process for the recovery of ethylene oxide (EO) from fat absorbent (FA) which comprises providing a feed of elevated temperature FA to an EO Stripper, providing a stripping gas feed and contacting the stripping gas feed at elevated temperature with the elevated temperature FA feed, obtaining stripped lean absorbent (LA) and an EO-containing gas, and providing one or more external process stream feeds to the EO Stripper at a location above the elevated temperature FA feed and at a lower temperature with respect to the elevated temperature FA feed thereby concentrating EO in the EO-containing gas. The process can also include one or more impurity removal stages in the form of one or more side draws from the EO Stripper or an EO Stripper Concentrator. The invention also includes an apparatus for performing the process. | 04-15-2010 |
20100105932 | RECOVERY OF COMPONENTS MAKING UP A LIQUID MIXTURE - A process for recovering hexafluoropropylene and hexafluoropropylene oxide from a liquid mixture of these components is provided. The process includes, in a stripping stage, contacting the mixture with a gaseous stripping agent, thereby to strip hexafluoropropylene from the mixture. A gaseous product comprising hexafluoropropylene and gaseous stripping agent is withdrawn from the stripping stage, as is a liquid product comprising hexafluoropropylene oxide. | 04-29-2010 |
20110144362 | CRYSTALLINE FORMS OF DIMETHOXY DOCETAXEL AND METHODS FOR PREPARING THE SAME - The invention relates to anhydrides, solvates and ethanol hetero-solvates and hydrates of dimethoxy docetaxel or (2R,3S)-3-tert-butoxycarbonylamino-2-hydroxy-3-phenyl-propionate of 4-acetoxy-2α-benzoyloxy-5β,20-epoxy-1-hydroxy-7β, 10β-dimethoxy-9-oxo-tax-11-ene-13α-yl, and to the preparation thereof. | 06-16-2011 |
20110245519 | Purification of propylene oxide - The invention is a method of purifying propylene oxide containing 25-100 ppm aldehyde impurities. The method comprises contacting the propylene oxide in the liquid phase with an amine-functionalized ion exchange resin, and recovering a purified propylene oxide product containing 10 ppm, or less, aldehydes. | 10-06-2011 |
20120077999 | Method For Obtaining A Fraction Enriched With Functionalized Fatty Acid Esters From Seeds of Oleaginous Plants - The invention relates to a method for the selective extraction of functionalised fatty acid esters from seeds of oleaginous plants, wherein said method includes: a) at least one step of extracting fatty acid esters that comprises simultaneously feeding into a reactor containing said seeds a light anhydrous alcohol, a basic catalyst and an extraction solvent non-miscible with said light alcohol and in which said functionalised fatty ester is not soluble in order to obtain a mixture of esters and glycerol; b) and at least one step of selectively extracting hydroxylated fatty acid esters by feeding into the reactor said extraction solvent in a backflush direction relative to the light alcohol in order to obtain an alcohol phase enriched with fatty acid esters, a glycerol phase and a cake. The invention can be used for obtaining a fraction having a high concentration of hydroxylated or epoxydised functionalised fatty acid esters, and a solvent phase containing the other non-functionalised fatty acid esters directly from the seeds of oleaginous plants. | 03-29-2012 |
20120302776 | ALKYLENE OXIDE PURIFICATION SYSTEMS - Embodiments of the present disclosure provide processes, columns, and systems for removing acetaldehyde from alkylene oxide in a feed stream and for providing an alkylene oxide-water stream that can be directly transferred to a glycol reaction process. The alkylene oxide purification column includes a first section to convert a feed stream into a gas phase portion and a liquid phase portion and a second section located in the column above the first section to separate alkylene oxide from the acetaldehyde, water, and other impurities that enter the second section from the first section. | 11-29-2012 |
20150031905 | ALKYLENE OXIDE SEPARATION SYSTEMS, METHODS, AND APPARATUSES - A propylene oxide separation system that comprises a distillation column, a decanter, and water wash system. The distillation column is configured to receive a crude propylene oxide stream, discharge an impurity stream that comprises methanol and water, and discharge a bottoms stream that comprises a majority of the propylene oxide entering in the crude propylene oxide stream. The decanter is configured to receive at least a portion of the impurity stream and a hydrocarbon solvent to provide for formation in the decanter of an organic phase and an aqueous phase. The organic phase comprises propylene oxide and hydrocarbon solvent, and is sent to the distillation column. The aqueous phase comprises a majority weight percent of the methanol and the water entering in the impurity stream. The water wash system is configured to receive and purge the aqueous phase from the propylene oxide separation system. | 01-29-2015 |
20150315114 | Methods of Synthesizing a Prostacyclin Analog - The present invention provides processes for preparing a prostacyclin analogue of Formula (I) or a pharmaceutically acceptable salt thereof, wherein R | 11-05-2015 |
549542000 | By adsorption or by chemical reaction with impurity | 6 |
20090118523 | Separation of Propylene Oxide from a Mixture Comprising Propylene Oxide and Methanol - A method of separating propylene oxide from a mixture (M) comprising propylene oxide and methanol, said method comprising: (i) introducing said mixture (M) into an extractive distillation column; (ii) additionally introducing an extracting solvent into said extractive distillation column; (iii) distilling propylene oxide overhead from said extractive distillation column as top stream; (iv) withdrawing a bottoms stream from said extractive distillation column; (v) compressing the top stream obtained overhead in (iii) by means of at least one compressor to give a compressed vapor. | 05-07-2009 |
20100029964 | Alkylene oxide recovery systems - Embodiments of the present disclosure include processes and systems for recovering alkylene oxide. System embodiments include a stripping section located in an alkylene oxide recovery column to convert a feed stream comprising to a first gas phase portion comprising alkylene oxide, a condensing zone comprising at least a first condenser and a second condenser configured in series, and a reabsorption region located in the alkylene oxide recovery column above the last of the at least two condensers. | 02-04-2010 |
20100145082 | METHOD FOR PROCESSING COALESCENCE-INHIBITED EMULSIONS FROM WHOLE-CELL BIOTRANSFORMATIONS WITH COMPRESSED OR SUPERCRITICAL GASES,IN PARTICULAR WITH CARBON DIOXIDE - The method presented represents a possibility for separating emulsions derived from whole-cell biotransformations, which method makes it possible to effectively separate stable emulsions derived from typical biocatalytic two-phase processes that result in connection with such a biotransformation, by means of at least one compressed or supercritical gas. In this connection, a supercritical extraction to obtain the valuable product can follow directly, because of the use of compressed or supercritical gas as the separation agent. It is unimportant, in this connection, whether the valuable product is present in the aqueous or the organic phase. Recycling of the organic phase is possible, since the surfactant cell components, which are decisively responsible for the formation of the stable emulsion, can be separated off by means of sedimentation, because of the treatment. The separation that is achieved remains in existence even after the compressed or supercritical gas has gassed out, so that aside from extraction, other methods for product isolation can also follow, if this is necessary. In this connection, the invention contains tremendous potential for industrial use of biocatalytical two-phase processes, which are of great interest economically and ecologically. | 06-10-2010 |
20110190519 | AMBIENT TEMPERATURE PURIFICATION OF ALKYLENE OXIDES - A new purification technique for alkylene oxides is described. The technique is safer than previously reported methods and does not require cooling of the purification vessel. In a solution of a high-boiling point solvent and butyllithium, an alkylene oxide is added and allowed to react at ambient temperature. The impurities readily react with the butyllithium while the alkylene oxide does not. The low-boiling alkylene oxide is then easily distilled out of the high-boiling point solvent as a pure material ready for use in controlled polymerization reactions. | 08-04-2011 |
20130109872 | PROCESS AND ASSEMBLY FOR PRODUCING ALKYLENE OXIDES AND GLYCOL ETHERS | 05-02-2013 |
20150322025 | PROCESS AND ASSEMBLY FOR PRODUCTING ALKYLENE OXIDES AND GLYCOL ETHERS - There is provided a process for manipulating the amount of alkyl alcohol in a product stream, e.g., such as an alkylene oxide product stream. More particularly, and in contrast to conventional processes wherein substantially all of the alkyl alcohol must be separated and desirably recycled, in the present process, a greater amount of alkyl alcohol may be allowed to remain in a partially refined alkylene oxide product stream. The residual alkyl alcohol is subsequently substantially entirely reacted to form a downstream product, e.g., a glycol ether, which is more easily separated from the alkylene oxide product stream. Indeed, the amount of alkyl alcohol in the partially refined alkylene oxide product stream can be selected based upon the output of glycol ethers, if desired. | 11-12-2015 |