Abstract: The process of the present invention comprises reacting an aldehyde or ketone with an alcohol in the presence of a solid acid, and removing water and methanol from the reaction product by pervaporation, characterized in that a membrane having a flux density for water of 0.04 to 2.8 kg/(hm2) is used to remove the water and another membrane having a flux density for methanol of 2.0 to 100 kg/(hm2) is used to remove the methanol.

Abstract: The invention relates to a method for the synthesis of dialkoxyalkanes by means of the partial selective oxidation of a light alcohol. According to said method, the light alcohol is oxidized in the presence of molecular oxygen or a gas containing molecular oxygen, and a solid oxidation catalyst based on at least one metal in a reactive medium comprising a gaseous phase containing an acid compound according to the Pearson classification, having a pKa of less than 6.3 in solution in water. The reaction is carried out in a vapor or in a liquid phase.

Abstract: The invention describes a method of converting biomass to products that can be incorporated into the diesel fuel pool, comprising a first stage of fermentation of renewable raw materials of vegetable origin at the end of which a least one alcohol and at least one compound containing a carbonyl group are obtained, and a second stage corresponding to an acetalization reaction involving said alcohol and said compound containing a carbonyl group.

Abstract: The process of the present invention comprises reacting an aldehyde or ketone with an alcohol in the presence of a solid acid, and removing removing water and methanol from the reaction product by pervaporation, characterized in that a membrane having a flux density for water of 0.04 to 2.8 kg/(hm2) is used to remove the water and another membrane having a flux density for methanol of 2.0 to 100 kg/(hm2) is used to remove the methanol.

Abstract: The invention relates to the use of monoliths as particle filters for limiting the deactivation of catalysts during catalytic reactions in multi-tubular reactors. The invention is particularly well-suited for catalytic oxidation reactions in the gaseous phase. The invention also relates to multi-tubular reactors including monoliths as particle filters.

Abstract: The invention relates to a continuous process to make and isolate methylal by reacting formaldehyde and methanol with an acid catalyst under at least partial formation of methylal and water, to form a mixture M2 comprising formaldehyde, methanol, methylal, and water, separating the said mixture M2 in a distillation column B into three distinct product streams, one being a distillate taken from the column head BH which is rich in methylal, one taken from the column bottom stream BB being almost pure water, and one taken from the side of the column B below the reaction zone which stream is rich in methanol, characterised in that the ratio of the amount of substance of methanol to the amount of substance of formaldehyde in the mixture M1 is at least 3 mol/mol, and to an apparatus to be used with this process.

Abstract: A chemical reactor including: a plurality of heat exchange plates which between them define reaction compartments, in which reactor each heat exchange plate includes two walls between them defining at least one heat exchange space, the respective walls being fixed together by joining regions, and the reactor also comprises at least one injection device for injecting substance into the reaction compartments, said substance-injection device passing through the heat-exchange plates in respective joining regions thereof. Also, a chemical reaction process that can be carried out in this reactor.

Abstract: Disclosed herein is a method for producing alkoxy alkanes by direct partial oxidation of a lower alcohol with a catalyst based upon mixed oxide containing molybdenum and at least one other metal selected from the metals that can assume a trivalent oxidation state such as Fe, Bi, Al, Cr, In, La, Sb, and/or a metal selected from Ni, Co, Cu, V, W, Ti, Ta, Nb, Mn, Sn, P.

Abstract: A process for preparing polyoxymethylene dimethyl ethers from methanol is disclosed. For example, the process comprises contacting methanol with at least one oxidant in the presence of at least one catalyst wherein the at least one catalyst comprises at least one Group VIB metal component, such as in an amount of from about 0.5 to about 50 wt % (in terms of metal oxide) and at least one Group VIII metal component, such as in an amount of from about 0.2 to about 20 wt % (in terms of metal oxide), and at least one molecular sieve having acidic catalytic activity, such as in an amount of from about 40 to about 95 wt %, based on the total weight of the at least one catalyst for a time sufficient to obtain polyoxymethylene dimethyl ethers.

Abstract: The present invention discloses a method for synthesizing polyoxymethylene dimethyl ethers by ionic liquid catalysis. The method comprises synthesizing polyoxymethylene dimethyl ethers by using a functional acidic ionic liquid as catalyst and using methylal and trioxymethylene as reactant under a relative mild reaction condition. The invention has advantages of high catalyst activity and reaction conversion, simple reaction process, high operationability and controllability, as well as good product distribution and high raw material utilization ratio.

Abstract: Acetals are formed from an aldehyde hydrogenation product mixture comprising alcohols and at most 2% of alde-hydes and the product is distilled to yield purified alcohols and a second stream containing acetals and/or unsaturated ethers.

Abstract: The presently disclosed subject matter is a new technology, related to a simulated moving bed membrane reactor. This novel technology includes a reactor with two different separation techniques: i) chromatography (simulated moving bed—SMB); ii) selective permeable membrane (namely, pervaporation and permeation, among others) into a single device, allowing a significant increase in the unity productivity and considerable reduction of solvent consumption and consequently lowers downstream costs associated to the following separation units, for the same product purity and reactants conversion criteria. It has its main applications in the chemical industry, particularly, in the continuous production of oxygenated compounds as esters, acetals, ethers, carbonates, among others.

Abstract: A compound which satisfies requirements for the annealing property and the lubricating property simultaneously and a process for producing the compound are provided. The compound is an alkylacetal compound represented by the following general formula (1) or (2). In the general formulae, R1 and R2 represent hydrocarbon groups, R3 to R8 represent hydrogen atom or hydrocarbon groups, i and j represent integers satisfying the relation that the sum of the integers is 8 to 98, and k represents 0 or 1.

Abstract: A zwitterionic phosphonium salt of Formula I: wherein n is 0 or 1; R is H or SO3; R? is selected from the group consisting of C1-C10 alkyl, C2-C10 alkenyl, C2-C10 alkynyl, C3-C10 cycloalkyl, phenyl, substituted phenyl, benzyl and C1-C10 alkoxy-carbonyl; R? is CX3 when n is O; and X is selected from the group consisting of F, Cl, Br and I. The zwitterionic phosphonium salts are useful reagents for the preparation of alkenes and acetals from the corresponding aldehyde.

Abstract: The invention relates to a method for producing alkoxy alkanes by direct partial oxidation of a lower alcohol with a catalyst based upon mixed oxide containing molybdenum and at least one other metal selected from the metals that can assume a trivalent oxidation state such as Fe, Bi, Al, Cr, In, La, Sb, and/or a metal selected from Ni, Co, Cu, V, W, Ti, Ta, Nb, Mn, Sn, P.

Abstract: The invention relates to the use of monoliths as particle filters for limiting the deactivation of catalysts during catalytic reactions in multi-tubular reactors. The invention is particularly well-suited for catalytic oxidation reactions in the gaseous phase. The invention also relates to multi-tubular reactors including monoliths as particle filters.

Abstract: The invention relates to a method for the synthesis of dialkoxyalkanes by means of the partial selective oxidation of a light alcohol. According to said method, the light alcohol is oxidised in the presence of molecular oxygen or a gas containing molecular oxygen, and a solid oxidation catalyst based on at least one metal in a reactive medium comprising a gaseous phase containing an acid compound according to the Pearson classification, having a pKa of less than 6.3 in solution in water. The reaction is carried out in a vapour or in a liquid phase.

Abstract: The invention describes a method of converting biomass to products that can be incorporated into the diesel fuel pool, comprising a first stage of fermentation of renewable raw materials of vegetable origin at the end of which a least one alcohol and at least one compound containing a carbonyl group are obtained, and a second stage corresponding to an acetalization reaction involving said alcohol and said compound containing a carbonyl group.

Abstract: The use of a complex oxide having the following composition (I). Mo12VaX1bX2cX3dX4eOx (I) wherein Mo is molybdenum; V is vanadium; O is oxygen; X1 is at least one element selected from tungsten, titanium, tantalum and niobium; X2 is at least one element selected from copper, antimony, tellurium and bismuth; X3 is at least one element selected from alkaline earth metals; X4 is at least one element selected from alkaline metals; and O<a?10; O?b?4; O<c?5; O?d?2; O?e?2; and x is a numerical value determined by the extents of the oxidation of the other elements, as a catalyst in the preparation of a partial oxidation product of a lower alcohol by direct oxidation of a lower alcohol in the vapor phase.

Abstract: Acetals are formed from a mixture comprising alcohols and aldehydes and the product is distilled to yield purified alcohols and/or acetals and/or unsaturated ethers.

Abstract: A process for the preparation of dibutoxymethane, in one embodiment from 50% formaldehyde, in a condensation reaction without the use of co-solvent.

Abstract: 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 condition. The catalyst of this invention has a high catalytic activity and a high conversion; the reaction process is simple, easy to be operated and has a strong controllability; the distribution of the products after reaction is superior and the utilization ratio of the raw materials is high.

Abstract: 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 least partly converting them to the acetal, heating the column bottom disposed below the reaction/distillation zone in order to at least partly evaporate the bottom's mixture and to establish a defined temperature in the reaction/distillation zone, feeding an extractant into a rectifying section of the column, disposed above the reaction/distillation zone and condensing a product having more than 90% by weight of acetal at the top of the column.

Abstract: The use of a complex oxide having the following composition (I). M012VaX1bX2cX3dX4eOx (I) wherein Mo is molybdenum; V is vanadium; 0 is oxygen; X1 is at least one element selected from tungsten, titanium, tantalum and niobium; X2 is at least one element selected from copper, antimony, tellurium and bismuth; X3 is at least one element selected from alkaline earth metals; X4 is at least one element selected from alkaline metals; and O<a?10; O?b?4; 0<c?5; O<d?2; 0?e?2; and x is a numerical value determined by the extents of the oxidation of the other elements, as a catalyst in the preparation of a partial oxidation product of a lower alcohol by direct oxidation of a lower alcohol in the vapor phase.

Abstract: 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 water) by selective adsorption. The SMB reactor consists of a set of interconnected columns packed with an acid solid (or mixture of acid solids: catalysts and adsorbents) effective for catalyzing the reaction between aldehydes and alcohols and for separating the reaction products by selective adsorption of at least one product.

Abstract: 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 condition. The catalyst of this invention has a high catalytic activity and a high conversion; the reaction process is simple, easy to be operated and has a strong controllability; the distribution of the products after reaction is superior and the utilization ratio of the raw materials is high.

Abstract: 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 water) by selective adsorption. The SMB reactor consists of a set of interconnected columns packed with an acid solid (or mixture of acid solids: catalysts and adsorbents) effective for catalyzing the reaction between aldehydes and alcohols and for separating the reaction products by selective adsorption of at least one product.

Abstract: 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 present process provides for a refined process stream that contains no more than 5 ppm by weight unreacted acrolein.

Abstract: The invention relates to a method of obtaining polyoxygenated organic compounds. The inventive method is characterized in that it comprises the oxidation reaction of a diether, preferably an acetal, with an oxygen source, in the presence of: one or more radical initiating agents, one or more additives that generate a basic reaction medium, and one or more catalysts.

Abstract: A compound which satisfies requirements for the annealing property and the lubricating property simultaneously and a process for producing the compound are provided. The compound is an alkylacetal compound represented by the following general formula (1) or (2). In the general formulae, R1 and R2 represent hydrocarbon groups, R3 to R8 represent hydrogen atom or hydrocarbon groups, i and j represent integers satisfying the relation that the sum of the integers is 8 to 98, and k represents 0 or 1.

Abstract: 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 unit resulting from polymerization of a monomer exhibiting a polymerization activity, wherein the monomer has a fluorine-containing acetal or ketal structure represented by general formula (1): wherein R represents an atomic group containing a carbon-carbon double bond exhibiting polymerization activity; at least one of R1 and R2 is fluorinated alkyl group or fluorinated aryl group having 1 to 20 carbon atoms; and R3 represents a radical selected from the group consisting of hydrogen atom, alkyl group, alkoxy-substituted alkyl group, fluorinated alkyl group, aryl group, fluorinated aryl group, aralkyl group and fluorinated aralkyl group having 1 to 20 carbon atoms.

Abstract: 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, adding 2-aminoethanol and at least one base as assistants in the distillation, and isolating purified 2-methoxypropene.

Abstract: 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 present process provides for a refined process stream that contains no more than 5 ppm by weight unreacted acrolein.

Abstract: 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)acetal, are useful as intermediates in the synthesis of substituted 1,3-oxathiolanes and substituted 1,3-dioxolanes.

Abstract: 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 hydrocarbon group; or the two R1 are bonded together to form a saturated ring having 5 to 7 atoms and including the oxygen atoms to which the R1 groups are bonded, this ring being possibly substituted by methyl or ethyl groups; and the wavy line indicates that the double bond in position 4 has a configuration of the type (Z) or (E) or a mixture of the two configurations. The invention relates also to the use of such compounds as perfuming or flavoring ingredients, as well as the perfumed or flavored articles or perfuming or flavoring compositions containing such compounds.

Abstract: 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, with less side reaction and in high yield. A process for producing an ether compound having a group represented by the general formula (II) wherein R1, R2 and R3 may be the same or different, and represent substituted or unsubstituted alkyl, substituted or unsubstituted aryl or substituted or unsubstituted aralkyl, or R1 and R2 form cycloalkyl together with an adjacent carbon atom, which comprises allowing a compound having a hydroxyl group (including a carboxyl group) to react with an alkenyl ether represented by the general formula (I) wherein R1, R2 and R3 have the same significances as defined above, respectively.

Abstract: 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 (dimethoxymethane) and methyl formate. Production of dimethyl ether from methanol can be inhibited by partial deactivation of acid sites on the Keggin catalyst.

Abstract: The present invention provides novel processes for preparing a fluorinated acyl fluoride and a fluorinated vinyl ether.

Abstract: 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 product, when the resin catalyst as used for the reaction is persevered so as to recycle it after it is recovered, the unreacted alkylene oxide remaining in the resin catalyst can be prevented from polymerizing and solidifying during the preservation, and the resin catalyst accordingly can be preserved stably for a long time. The resin catalyst as recovered after it is used for the reaction may be preserved under any of the following conditions: 1) at a low temperature of not higher than 40° C.

Abstract: 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 present process provides for a refined process stream that contains no more than 5 ppm by weight unreacted acrolein.

Abstract: 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.

Abstract: The present invention provides novel processes for preparing a fluorinated acyl fluoride and a fluorinated vinyl ether.

Abstract: 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 and those in which a C8 to C30 primary alcohol is reacted with an organic base in the presence of a suitable oxidizing agent under basic conditions.

Abstract: 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 least one olefin containing four to seven carbon atoms to at least one aldehyde, in the presence of a catalyst and a synthesis gas under hydroformylation conditions, a step b) for hydrogenation of this aldehyde to at least one corresponding alcohol, and a step c) for transforming at least one alcohol obtained from step b) in the presence of a catalyst under conditions for producing a mixture containing at least one ether or at least one acetal.

Abstract: 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 of a lower alcohol such as methanol or the like, and to provide a method for manufacturing a partial oxide of a lower alcohol such as dimethoxymethane or the like selectively and efficiently from a lower alcohol such as methanol or the like by using this catalyst for a lower alcohol oxidation reaction. A partial oxide of a lower alcohol such as dimethoxymethane or the like is manufactured by subjecting a lower alcohol to vapor phase contact oxidation with a molecular oxygen-containing gas in the presence of an oxidation reaction catalyst for a lower alcohol composed of a rhenium-antimony compound oxide such as SbRe2O6 or the like. When the vapor phase contact oxidation is conducted, in particular, at a temperature of 300 to 400° C.

Abstract: 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 glycol or a derivative thereof to gas-liquid counter current contact to remove the water and methanol.

Abstract: 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 complex of univalent gold.

Abstract: A novel process for the manufacture of a .gamma.-halotiglic aldehyde HalH.sub.2 C-CH.dbd.C(CH.sub.3)-CHO [I], wherein Hal signifies chlorine or bromine, comprises haloalkoxylating a 1-alkoxy-2-methyl-1,3-butadiene H.sub.2 C.dbd.CH-C (CH.sub.3).dbd.CH-OR.sup.1 [II], wherein R.sup.1 signifies C.sub.1-4 -alkyl, using a particular halogenating agent in a C.sub.1-4 -alkanol (R.sup.2 OH) and hydrolyzing the thus-obtained .gamma.-halotiglic aldehyde dialkyl acetal HalH.sub.2 C-CH.dbd.C(CH.sub.3)-CH (OR.sup.1)(OR.sup.2) [III] to the desired .gamma.-chloro- or .gamma.-bromotiglic aldehyde I. The halogenating agent used in this process is selected from an alkali metal hypochlorite, an alkali metal hypobromite, an alkaline earth metal hypochlorite, an alkaline earth metal hypobromite, tert.butyl hypochlorite, N-bromoacetamide, 1.3-dichloro-5,5-dimethylhydantoin and 1,3-dibromo-5,5-dimethylhydantoin. Further aspects of the present invention are the use of the thus manufactured .gamma.

Abstract: 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--CH.sub.2 (OCH.sub.2).sub.X OR (V)is generated, wherein x is between about 1 to about 5 and R is an organic moiety. This product is then reacted with a carboxylic acid anhydride. The resulting product has the formula:R--O--CH.sub.2 O--COR.sup.1wherein R.sup.1 is a C.sub.1 -C.sub.6 alkyl group. The invention further relates to intermediates used in the production of such acyloxyalkoxylated compounds.

Abstract: 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 the molecule and having 11 to 22 carbon atoms and lower alkyl esters thereof with an unsaturated compound selected from the group consisting of fatty acids each having one carboxyl group and 2 to 4 double bonds in the molecule and having 11 to 22 carbon atoms and whose iodine value ranges from 30 to 130 g (iodine)/100 g to give dimers and trimers, then converting the carboxyl groups (or the lower alkyl ester group in case of the lower alkyl esters) present in the resulting dimers and trimers into hydroxyl groups through reduction to give a mixture substantially consisting of dimer diols and trimer triols, and then subjecting the mixture having a dimer diol/trimer triol weight ratio ranging from 30/70 to 99/1 to an esterification reaction with an .alpha., .beta.