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| Number | Title | Issue Date |
| 7560599 | Method for preparing polymethoxymethylal This invention describes a method for preparing polymethoxymethylal. By this method, polymethoxymethylal is prepared by a catalytic reaction using methanol and trioxymethylene as reactants and using an ionic liquid as catalyst under a relatively moderate reaction co... | 07/14/2009 |
| 7534922 | Processes for the manufacture of acetals A process for preparing acetals from aldehydes and alcohols is carried out by generating a reaction/distillation zone charged with an acidic fixed bed catalyst in a distillation column, feeding the aldehyde and the alcohol to the reaction/distillatlon zone and at le... | 05/19/2009 |
| 7488851 | Industrial process for acetals production in a simulated moving bed reactor The present invention is an industrial process for the preparation of acetals using a simulated moving bed (SMB) reactor system to accomplish the conversion of reactants (aldehyde and alcohol) and simultaneously, the separation of the reaction products (acetal and w... | 02/10/2009 |
| 7432404 | Process for removal of acrolein from acrylonitrile product streams Acrolein is removed from a process stream such as a process stream generated in the manufacture of acrylonitrile. The process includes reacting the acrolein with a compound containing a reactable thiol or hydroxyl moiety in the presence of an acid catalyst. The pres... | 10/07/2008 |
| 7294448 | Composition sensitive to visible light The present invention provides a visible light-sensitive composition which is highly sensitive to a visible light and is useful as an electronic circuit forming material, a lithographic printing material, etc., said visible light-sensitive composition comprising (a)... | 11/13/2007 |
| 7232639 | Monomer having fluorine-containing acetal or ketal structure, polymer thereof, and chemical-amplification-type resist composition as well as process for formation of pattern with use of the same As a polymer exhibiting improved transparency which is suitable for a resist resin used in a chemical-amplification-type resist being applicable for photolithography using exposure light at 180 nm or shorter, this invention provides a polymer comprising a repeating ... | 06/19/2007 |
| 7208640 | Process for isolating highly pure 2-methoxypropene A process for isolating purified 2-methoxypropene from a mixture which comprises 2,2-dimethoxypropane, 2-methoxypropene, methanol, acetone, and optionally other carbonyl group-containing compounds, which process involves subjecting the mixture to distillation, addin... | 04/24/2007 |
| 7196231 | Process for removal of acrolein from acrylonitrile product streams Acrolein is removed from a process stream such as a process stream generated in the manufacture of acrylonitrile. The process includes reacting the acrolein with a compound containing a reactable thiol or hydroxyl moiety in the presence of an acid catalyst. The pres... | 03/27/2007 |
| 7122693 | Acetaldehyde acetal compounds, their synthesis, and uses thereof The acetaldehyde compounds, 2-thiobenzoylacetaldehyde diethylacetal, 2-benzoyloxyacetaldehyde bis(2-methoxyethyl)acetal, 2-hydroxyacetaldehyde bis( 2-methoxyethyl)acetal, 2-thiobenzoylacetaldehyde bis(2-methoxy-ethyl)acetal, and 2-thioacetaldehyde bis(2-methoxyethyl... | 10/17/2006 |
| 7022665 | Acetals of 2,4,7-decatrienal as perfuming or flavoring ingredients The present invention relates to an acetal of formula in which the symbols R1 represent, independently or simultaneously, a linear or branched saturated or unsaturated C1 to C4 hydrocarb... | 04/04/2006 |
| 7015363 | Process for producing ether compound The present invention provides the following process for producing and the like, which enables the production of an ether compound, which is useful for chemical amplification type resist compositions, synthetic intermediates of pharmaceuticals, paints, or the like, ... | 03/21/2006 |
| 6956134 | Oxidation of methanol and/or dimethyl ether using supported molybdenum-containing heteropolyacid catalysts Feeds comprising methanol, dimethyl ether or a mixture of the two are oxidized by contacting the feed with an oxygen-containing gas and a supported heteropolyacid catalyst containing molybdenum or molybdenum and vanadium. The primary products are methylal (dimethoxy... | 10/18/2005 |
| 6919480 | Processes for the preparation of fluorinated acyl fluorides and fluorinated vinyl ethers The present invention provides novel processes for preparing a fluorinated acyl fluoride and a fluorinated vinyl ether. Namely, it provides a process for preparing a fluorinated acyl fluoride (3), which comprises reacting a compound (1) having a fluorine cont... | 07/19/2005 |
| 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 |
| 6806392 | Process and manufacturing equipment for preparing acetals and ketals A process for the preparation of acetals and ketals by reacting an aldehyde or ketone with an alcohol in the presence of an acidic catalyst and removing water by pervaporation. Manufacturing equipment for the preparation of acetals and ketones is also provided. ... | 10/19/2004 |
| 6747174 | Processes for the preparation of fluorinated acyl fluorides and fluorinated vinyl ethers The present invention provides novel processes for preparing a fluorinated acyl fluoride and a fluorinated vinyl ether. Namely, it provides a process for preparing a fluorinated acyl fluoride (3), which comprises reacting a compound (1) having a fluorine cont... | 06/08/2004 |
| 6512146 | Process for preparing a dialkyl acetal of a C8 to C30 aldehyde Improved water resistant acetal sizing agents including 1,1-octadecoxyoctadecane are provided along with methods for their synthesis including methods in which C8 to C30 alkyl bromides are reacted with a polyol under basic conditions... | 01/28/2003 |
| 6486362 | Process for producing oxygen-containing compounds containing at least one oxygen atom bonded to two distinct carbon atoms which are not bonded together and not including a multiple bond A process for producing oxygen-containing compounds containing at least one oxygen atom bonded to two distinct carbon atoms which are not bonded together and not comprising a multiple bond comprises a step a) for hydroformylation of a feed comprising at l... | 11/26/2002 |
| 6403841 | Process for preparing partial oxidates of lower alcohols An object of the present invention is to provide a catalyst for a lower alcohol oxidation reaction which makes possible to manufacture a partial oxide of a lower alcohol such as dimethoxymethane or the like selectively and efficiently by direct oxidation ... | 06/11/2002 |
| 6160185 | Process for purification of methylal Provided is a process for high purification of methylal by removing water and methanol present as impurities from the methylal. The process for purification of methylal comprises subjecting a methylal gas containing water and methanol and a polyalkylene g... | 12/12/2000 |
| 6037482 | Process for catalytic addition of nucleophiles to alkynes or allenes A process for the catalytic addition of nucleophilic agents to alkynes or allenes to form alkenes substituted by the nucleophile which may further react with the nucleophile and/or isomerize comprises using a catalyst comprising a wholly or partly ionized... | 03/14/2000 |
| 5990360 | Process for the catalytic dealkoxylation of 1,1,3-trialkoxy-2-methyl-butane A novel process for the manufacture of a γ-halotiglic aldehyde HalH2 C-CH.dbd.C(CH3)-CHO [I], wherein Hal signifies chlorine or bromine, comprises haloalkoxylating a 1-alkoxy-2-methyl-1,3-butadiene H2 C.dbd.CH-C (CH3... | 11/23/1999 |
| 5852208 | Method of producing compounds containing acyloxyalkoxy groups from alcohols A process of producing compounds containing an acyloxyalkoxy group from an alcohol consists of reacting the alcohol with a formaldehyde donor until a compound of the formula: R--O--CH2 (OCH2)X OR (V) is g... | 12/22/1998 |
| 5798434 | Monomer mixture and method for the preparation thereof A monomer mixture having a hydroxyl value ranging from 0 to 134 KOH mg/g, obtainable by polymerizing a mixed raw material of an unsaturated compound selected from the group consisting of fatty acids each having one carboxyl group and one double bond in th... | 08/25/1998 |
| 5792876 | Process for producing acetals A process is described for producing acetals comprising reacting an aldehyde or a ketone with an alcohol in the presence of a titanium compound having an acetylacetone as a ligand, or in the presence of a compound selected from the group consisting of sta... | 08/11/1998 |
| 5783732 | 2:2 mixed Fluoro-, and fluoronitroalkyl orthocarbonates 2:2 mixed orthocarbonates of the formula ##STR1## wherein R.noteq.R' and wherein R and R' are --C(NO2)3, --CF(NOb.2)2, --CF2 (NO2), --C(NO2)2 CH3, --CH(NO2 | 07/21/1998 |
| 5672779 | Ester compound, active agent for controlling noxious insect pests containing the same as active ingredient, intermediate for production of the ester compound and process for producing the intermediate The present invention provides a compound represented by the formula: ##STR1## wherein R1 denotes a hydrogen atom or a methyl group; R2 represents a 1-methyl-2-propenyl group, a 1-methyl-2-propynyl group, a 3,3-dihalogeno-1-meth... | 09/30/1997 |
| 5631406 | Chemical compounds Dichloroformals of the formula (RCH2 O)2 CCl2 wherein R is --C(NO2)3, --CF(NO2)2, --CF2 (NO.su), --CCl(NO2)2, --C(NO2)2 CH3 | 05/20/1997 |
| 5565585 | Azido diacetal propane derivatives A new and practical method for synthesizing heterocyclic polyhydroxylated alkaloids using enzymatic aldol condensation and catalytic intramolecular reductive amination is disclosed.... | 10/15/1996 |
| 5550299 | Method of preparing 1.1-dialkoxycycloalkanes Ortho esters of the structure ##STR1## wherein R1 and R2 are different or the same alkyl moieties and can be a saturated, unsaturated, branched, unbranched or cyclic alkyl moiety of 1-3 carbon atoms, are prepared by first anhydr... | 08/27/1996 |
| 5527969 | Process for preparing acetaldehyde diethyl acetal A process for preparing acetaldehyde diethyl acetal is provided which involves: reacting acetaldehyde with ethanol in the presence of an acid catalyst and in the presence of an entrainer having a boiling point of from 25° to 75° C.... | 06/18/1996 |
| 5449836 | Process for the preparation of vitamin A and intermediate compounds which are useful for this process A process for the preparation of vitamin A which preferably comprises bringing cyclogeranyl sulphone into contact with a C10 aldehyde acetal, halogenating the derivative obtained and then removing the halogen group and the sulphone, removing th... | 09/12/1995 |
| 5399778 | Process for the preparation of ketals Ketals of longer-chain or branched alcohols are prepared from dimethyl ketals or their ketones by reaction of the dimethyl ketals and the alcohols at high temperatures of 150° to 180° C. in the presence of acid catalysts. The enol ethers and mixed ketal... | 03/21/1995 |
| 5393867 | Polyether polymers derived from 3,4-epxoy-1-butene Disclosed are novel polyether compounds obtained by the reaction or polymerization of 3,4-epoxy-1-butene in the presence of a palladium(O) catalyst and a nucleophilic initiator compound. The polyether compounds comprise n units of residue (1) and m units ... | 02/28/1995 |
| 5362918 | Process for producing acetaldehyde dimethylacetal A process for producing acetaldehyde dimethylacetal comprising reacting acetaldehyde and methanol in the presence of an acid catalyst is disclosed, in which the reaction is carried out in a part of a rectification tower while conducting rectification to w... | 11/08/1994 |
| 5350878 | Fluorinated compounds containing hetero atoms and polymers thereof This invention provides 1) novel reactive fluorinated compounds derived from a specified class of telomers or cotelomers of fluoroolefins; and 2) stable products and stable polymers thereof obtained by reaction or polycondensation of the novel reactive fl... | 09/27/1994 |
| 5290912 | Process for producing a polyoxyalkylene compound The present invention has an object of producing a polyoxyalkylene compound by ring-opening polymerization of an alkylene oxide to a certain specific highly hydrophobic initiator. The present invention provides a process for producing a polyoxyalkylene co... | 03/01/1994 |
| 5254744 | Preparation and purification of poly(tetramethylene ether) formal glycols and poly(oxybutylene formal) glycols Oligomeric formal diols are prepared by coupling segments of poly(tetramethylene ether) glycols, each having a molecular weight of 650-3000, with formaldehyde in the presence of a granular acidic catalyst, to yield poly(tetramethylene ether) formal glycol... | 10/19/1993 |
| 5155281 | Preparing dichloroformals A method of preparing dichloroformals of the formula (RCH2 O)2 CCl2 by reaction of one mole of a thionocarbonate of the formula (RCH2 O)2 C.dbd.S with two moles of benzenesulfenyl chloride, chlorobenzenesulfenyl chl... | 10/13/1992 |
| 5132465 | Oxidation of primary alcohols to aldehydes using transition metal phthalocyanines as catalysts Primary alcohols may be oxidized to the corresponding aldehydes using non-toxic oxidizing agents such as tert-butyl hydroperoxide (TBHP) in the presence of a transition metal phthalocyanine catalyst. Representative catalysts include ferrous phthalocyanine... | 07/21/1992 |
