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| Number | Title | Issue Date |
| 7745668 | Processes for reducing color in polytrimethylene ether glycol polymers Processes for reducing color in PO3G are provided. The processes include contacting PO3G with an activated carbon and then separating the PO3G from the activated carbon by, for example, filtration. The process provides PO3G having an APHA color less than that before... | 06/29/2010 |
| 7414159 | Separation of liquid mixtures in a film evaporator A liquid mixture comprising at least one readily volatile and at least one sparingly volatile component is separated in a film evaporator by a process in which (i) a continuous stream of a liquid starting material mixture is provided, (ii) ... | 08/19/2008 |
| 7342142 | Hydrogenation of polytrimethylene ether glycol A process comprising contacting PO3G having color with hydrogen in the presence of a hydrogenation catalyst, wherein the PO3G, after hydrogenation, has a APHA color of less than about 50. ... | 03/11/2008 |
| 7294746 | Processes for removal of color bodies from polytrimethylene ether glycol polymers Processes for reducing color in PO3G are provided. The processes include contacting PO3G with an adsorbent and then separating the PO3G from the adsorbent by, for example, filtration. The process provides PO3G having an APHA color preferably less than about 50. The ... | 11/13/2007 |
| 7288682 | Separation of bifunctional perfluoropolyethers (PFPEs) having -CHOH termination from their mixtures with -CHOH monofunctional PFPEs A process for separating bifunctional perfluoropolyethers (PFPEs) having two terminations —CH2OH from their mixtures with monofunctional PFPEs with one termination —CH2OH, of general formula X1—O—Rf—Y (I) | 10/30/2007 |
| 7247606 | Branched reaction products A compound of formula: wherein each R group independently is C6-C10 arylene group, a straight or branched chain C2-C°alkylene group optionally containing an arylene gr... | 07/24/2007 |
| 7235183 | Glycerine foots salt separation system The present invention provides a method and apparatus for the recovery of salt from a glycerine process, allowing the salt to be used in a brine solution. A salt settling tank is positioned inline between the foots from a crude still bottom and a foot still. Salt se... | 06/26/2007 |
| 7214833 | Process for preparing perfluoropolyethers A process to obtain perfluoropolyethers comprising: a) synthesis of peroxidic perfluoropolyethers by one of the following reactions: al) TFE photooxidation, in solvents selected between perfluorocarbons and (mono)h... | 05/08/2007 |
| 7186867 | Process for preparing reactive polyether polyols having an ethylene oxide end block Process for preparing polyether polyols having an end block of ethylene oxide by addition of alkylene oxides onto H-functional starter substances, in which A) a polyether polyol precursor is prepared by means of double metal cyanide (DMC) catalysis in a... | 03/06/2007 |
| 7074969 | Process for preparation of polytrimethylene ether glycols There is disclosed a process for preparing polytrimethylene ether glycol by acid catalyzed polycondensation, neutralization and contact with filter aid. The process avoids hydrolysis and yet provides product substantially free of catalyst derived end groups. ... | 07/11/2006 |
| 7009082 | Removal of color bodies from polytrimethylene ether glycol polymers A process is described for reducing the discoloration of PO3G. The discolored polymer is contacted with adsorbent and separated therefrom, for instance, by filtration. The treated polytrimethylene, preferably, has an APHA color of less than about 50 and a molecular ... | 03/07/2006 |
| 7005552 | Single reactor synthesis of KOH-capped polyols based on DMC-synthesized intermediates The present invention relates to processes for preparing ethylene oxide (EO)-capped polyols in which removal of catalyst residues or salts formed by the neutralization of the basic catalyst is not required prior to discharging the polyol from the reactor because neu... | 02/28/2006 |
| 6987201 | Acetic anhydride, method of purifying crude acetic anhydride, and method of producing polyoxytetramethylene glycol using acetic anhydride The present invention provides acetic anhydride, a method of purifying crude acetic anhydride, and a method of producing polyoxytetramethylene glycol using acetic anhydride. A method of producing polyoxytetramethylene glycol by ring-opening-polymerizing tetra... | 01/17/2006 |
| 6977291 | Production of polytrimethylene ether glycol and copolymers thereof A process for the manufacture of polytrimethylene ether glycol comprising the steps of: (a) providing (1) 1,3-propanediol reactant selected from the group consisting of 1,3-propanediol and/or oligomers or prepolymers of 1,3-propanediol having a degree of polymerizat... | 12/20/2005 |
| 6977045 | Process for the fractionation of polymers A process for the purification or fractionation of aqueous soluble polymers using an aqueous two-phase system is described. The concentrations of the polymer to be fractionated and of an aqueous soluble salt, and the temperature of the aqueous fractionation medium a... | 12/20/2005 |
| 6939993 | Method for separation of reaction products from catalysts Method for separating reaction product from imide compound catalyst represented by Formula (1) or derivative thereof in reaction mixture obtained by reaction in presence of imide compound catalyst: wherein R1 | 09/06/2005 |
| 6930210 | Process to produce polyether polyols The invention relates to a process to produce high-purity, low-odour polyether polyols, with very low levels of catalytic residues, by means of alkene oxide polyaddition reactions to substances that contain active hydrogens in the presence double metal cyanides as c... | 08/16/2005 |
| 6927310 | Tripropylene glycol production A method for forming multiple tripropylene glycol products of acrylate grade comprising forming a composition of dipropylene glycol, tripropylene glycol, tetrapropylene glycol and heavier, and at least one aldehyde, separating from said composition tripropylene glyc... | 08/09/2005 |
| 6906110 | Method for the production of polyurethanes In a process for producing polyurethanes by reacting at least one polyisocyanate with at least one compound containing at least two hydrogen atoms which are reactive toward isocyanate groups, the compound having at least two active hydrogen atoms which is used is at... | 06/14/2005 |
| 6858761 | Process for preserving resin catalyst for addition reaction of alkylene oxide and utilization of this process The present invention provides a process and its utilization in a process comprising the step of carrying out an addition reaction of an alkylene oxide to an addition-receiving substance in the presence of a resin catalyst, thereby producing the addition reaction pr... | 02/22/2005 |
| 6835686 | Catalyst system and process for rearrangement of epoxides to allylic alcohols A catalyst system comprising a primary catalyst chosen from one or more homogeneous or heterogeneous, inorganic, organic or complex metal-containing compound; and one or more phenolic activator/modifier(s). The catalyst system can be used for the preparation of ally... | 12/28/2004 |
| 6818587 | Double-metal cyanide catalysts for preparing polyether polyols The invention relates to double-metal cyanide (DMC) catalysts for preparing polyether polyols by the polyaddition of alkylene oxides on to starter compounds containing active hydrogen atoms, wherein the DMC catalysts are composed of: a) at least one DMC compound; b)... | 11/16/2004 |
| 6812367 | Polyethylene glycol and process for producing the same Polyethylene glycol for use in fields with application to a living body wherein the sum of the contents of ethylene glycol and diethylene glycol in the polyethylene glycol is less than or equal to that expressed in the following formula [I]: ... | 11/02/2004 |
| 6780813 | Process for producing DMC catalysts The invention relates to an improved method of producing double-metal cyanide (DMC) catalysts for the production of polyether polyols by polyaddition of alkylene oxides to starter compounds containing active hydrogen atoms, in which the DMC catalyst dispersion is pr... | 08/24/2004 |
| 6776925 | Process for the preparation of polyether polyols The present invention relates to a process for the production of polyether polyols by polyaddition of alkylene oxides onto starter compounds containing active hydrogen atoms conducted in the presence of a double-metal cyanide catalyst wherein a reaction mixture is g... | 08/17/2004 |
| 6761824 | Process for the fractionation of polymers A process for the purification or fractionation of aqueous soluble polymers using an aqueous two-phase system is described. The concentrations of the polymer to be fractionated and of an aqueous soluble salt, and the temperature of the aqueous fractionation medium a... | 07/13/2004 |
| 6734151 | Process for producing a high-purity oxygenic compound and lubricating oil A process for efficiently producing a high purity compound having oxygen which has a high volume specific resistance and a lubricating oil comprising the high purity compound having oxygen are provided. The process for producing a high purity compound having ... | 05/11/2004 |
| 6670406 | Process for producing polyether polyols The present invention relates to a process for the production of a polyether polyol by polyaddition of an alkylene oxide onto a starter compound containing active hydrogen atoms conducted in the presence of a double metal cyanide catalyst comprising condu... | 12/30/2003 |
| 6620976 | Polyethylene glycol and process for producing the same Polyethylene glycol for use in fields with application to a living body wherein the sum of the contents of ethylene glycol and diethylene glycol in the polyethylene glycol is less than or equal to that expressed in the following formula [I]: ##EQU1##... | 09/16/2003 |
| 6515036 | Method of decomposing a polyurethane A method of recovering a decomposition product from a polyurethane, the method comprising the steps of thermally decomposing a polyurethane into a liquid containing a polyol and a urea compound which is soluble in the polyol, and solids containing a urea ... | 02/04/2003 |
| 6504062 | Process for the preparation of odor-lean polyether polyols A process for the preparation of odor-lean polyether polyols from polyether polyol product stream obtained by reacting a starting compound having a plurality of active hydrogen atoms with one or more alkylene oxides, which process comprises the steps of: ... | 01/07/2003 |
| 6486354 | Solid phase supports Embodiments of the present invention generally relate to carrying out organic chemistry on solid supports comprising derivatised functionalities, methods for synthesizing said supports, methods for synthesizing compounds comprising amine groups or N-conta... | 11/26/2002 |
| 6455639 | Oxirane derivative and process for the preparation thereof An oxirane derivative and process for preparation of the same, having a high purity characterized in terms of gel permeation chromatography and thin layer chromatography. The oxirane derivative is useful as a starting material for medical purposes, and ma... | 09/24/2002 |
| 6448371 | Process for the purification of aldehyde impurities A novel process for the purification of poloxamers which contain aldehyde impurities, and particularly for the purification of the poloxamers named poloxamer 188 and poloxamer 407, which process includes dissolving the poloxamer(s) in a solvent which solv... | 09/10/2002 |
| 6444858 | Method of reducing flock during alkoxylation The present invention provides a method for alkoxylating organic compounds comprising contacting an organic compound adapted to be alkoxylated with an alkylene oxide in a reaction vessel under conditions effective to alkoxylate the organic compound. The a... | 09/03/2002 |
| 6437195 | Preparation of polyoxymethylene dimethyl ethers by acid-activated catalytic conversion of methanol with formaldehyde formed by dehydrogenation of methanol A particularly useful process which includes the steps of providing a feedstream comprising methanol, a soluble condensation promoting component capable of activating a heterogeneous acidic catalyst and a source of formaldehyde formed by conversion of met... | 08/20/2002 |
| 6410676 | Method for producing polyoxyalkylene polyol and derivatives thereof The object is to provide a method for producing a polyoxyalkylene polyol and a method for producing a derivative thereof wherein the remaining catalyst compound is efficiently removed from a crude polyoxyalkylene polyol by a simple manner, and a method fo... | 06/25/2002 |
| 6403842 | Processes for producing poly(alkylene ether) glycol Disclosed are a process for producing a poly(alkylene ether) glycol which comprises polymerizing a cyclic ether in the presence of at least a catalyst and a carboxylic acid anhydride, wherein the carboxylic acid anhydride has a ketene dimer content of 50 ... | 06/11/2002 |
| 6392102 | Preparation of polyoxymethylene dimethyl ethers by catalytic conversion of formaldehyde formed by oxidation of dimethyl ether A particularly useful process which includes the steps of providing a feedstream comprising providing a source of formaldehyde formed by conversion of dimethyl ether in the presence of a catalyst comprising tungsten oxide; and (i) heating the feedstream w... | 05/21/2002 |
| 6384216 | Purification of alkenyl compounds A process for purifying alkenyl compounds having a divalent or trivalent heteroatom in the -position relative to the double bond by distillation comprises carrying out at least two distillations in which the purified alkenyl compounds are obtained ... | 05/07/2002 |
