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| Number | Title | Issue Date |
| 7767865 | Method for producing hydroxypivalaldehyde and neopentyl glycol The preparation of hydroxypivalaldehyde is effected by aldolizing isobutyraldehyde with formaldehyde and subsequently working up the resulting reaction effluent by distillation, wherein the reaction effluent is fed to a distillation column which is operated at a top... | 08/03/2010 |
| 7439406 | Method for hydrogenating methylol alkanals Disclosed is a method for the catalytic hydrogenation of methylol alkanals of general formula (I), where R1 and R2 independently represent an additional methylol group or an alkyl group having with 1 to 22 carbon atoms, or an alkyl group with 1... | 10/21/2008 |
| 7294745 | Process for preparing aldol derivatives from alkenes using catalyst The present invention provides a novel eco-friendly multi-functional catalyst system useful to obtain C2(n+1) aldol-derivative from Cn-alkenes where n ranges from 2 to 10 in a single step under hydroformylation reaction conditions and adol form... | 11/13/2007 |
| 7247755 | Process for producing α,α-bis(hydroxymethyl)alkanal The present invention provides a process for producing an α,α-bis(hydroxymethyl)alkanal represented by Formula (II): (wherein R represents an alkyl group, a cycloalkyl group, or an aryl group) which comprises r... | 07/24/2007 |
| 7141702 | Process for the synthesis of α-substituted acroleins The present invention provides an improved process for the synthesis of α-substituted acroleins from olefins by a tandem hydroformylation and Mannich reaction sequence in the presence of syngas and formaldehyde, wherein the two catalysts are segregated into two dif... | 11/28/2006 |
| 7132574 | Preparation of perfluoropolyethers having at least one —CHOH or —CH(CF)OH end group A process for preparing perfluoropolyethers having at least one —CH2OH or —CH(CF3)OH end group by reaction of the corresponding pefluoropolyethers having at least one carboxylic —COOH or ketonic —(CF3)C═O end group with gas... | 11/07/2006 |
| 7098366 | Supported metal oxides as catalysts for aldol condensations A supported catalyst is proposed comprising one or more metal oxides as active component on a catalyst support for carrying out an aldol condensation, with the catalyst support being γ-aluminum oxide, the active component comprising one or more oxides of the elemen... | 08/29/2006 |
| 7045729 | Switch According to the switch of the present invention, a lubricant containing a base oil, a soft resin polymer, and a surface active agent is applied between a fixed tab and a contact strip that undergo sliding operation in response to vertical movement of an operating p... | 05/16/2006 |
| 6900357 | Direct, enantioselective aldol coupling of aldehydes using chiral organic catalysts Nonmetallic, chiral organic catalysts are used to catalyze an enantioselective aldol coupling reaction between aldehyde substrates. The reaction may be carried out with a single enolizable aldehyde, resulting in dimerization to give a β-hydroxy aldehyde, or trimeri... | 05/31/2005 |
| 6586636 | Aldol condensation Production of unsaturated aldehydes by the aldol condensation of straight chain aldehydes, e.g. butyraldehyde, by contacting the aldehyde in the vapour phase with a particulate catalyst comprising at least one basic alkali metal compound supported on an i... | 07/01/2003 |
| 6555716 | Process for the hydroformylation of olefins Aldehydes are prepared in a hydroformylation apparatus by the multiphase hydroformylation reaction of one or more olefins with hydrogen and carbon monoxide, where the continuous phase contains a solvent mixture and the hydroformylation catalyst is present... | 04/29/2003 |
| 6552232 | Process for conducting aldol condensation reactions in ionic liquid media The present invention is related to a method for forming aldol condensation products, comprising reacting at least one aldehyde starting material in the presence of an ionic liquid medium and a basic catalyst at a temperature range of from about -20° C. ... | 04/22/2003 |
| 6525227 | Method of reaction in water catalyzed by Lewis acid A reaction method by a novel Lewis acid catalyst stable in water for organic synthesis by using a metal compound stable in water and functioning as a Lewis acid catalyst and using water as apart or all of a solvent, the metal ion of the metal compound hav... | 02/25/2003 |
| 6433230 | Process for conducting an aldol condensation ,ଲ-Unsaturated keto compounds are prepared by base-catalyzed aldol condensation of aldehydes and/or ketones having from 1 to 15 carbon atoms, comprising: reacting the aldehydes and/or ketones with an aqueous catalyst solution under adiabatic ... | 08/13/2002 |
| 6380443 | Preparation of 1,3-diols A process for preparing 1,3-diols having 6 or more carbon atoms comprises a) provision of at least one alkanal having at least three carbon atoms; b) thermal treatment of the alkanal in the absence of a basic catalyst; c) hydrogenation of the aldol additi... | 04/30/2002 |
| 6380438 | Process for the production of 3-hydroxypropanal A process for producing 3-hydroxypropanal includes reacting formaldehyde and acetaldehyde to form an aqueous solution of acrolein; and hydrating the aqueous solution of acrolein to form 3-hydroxypropanal, wherein the aqueous solution of acrolein is capabl... | 04/30/2002 |
| 6340778 | Process for catalytic aldol condensations by means of a multiphase reaction The invention relates to a process for the catalytic aldol condensation of aldehydes by means of a multiphase reaction in a tube reactor, wherein the catalyst is present in the continuous phase and at least one aldehyde is present in a dispersed phase and... | 01/22/2002 |
| 6303549 | Fluorinated aerosol lubricating compositions Aerosol compositions containing fluorinated oils are disclosed. At least one fluorinated component compatible with the fluorinated oil and a propellant are included in the aerosol composition. Fluorinated oil-containing non-aerosol compositions are also d... | 10/16/2001 |
| 6069261 | Method of chemically reacting substances in a reaction column A process carried out in a reaction column for the chemical reaction of substances the reaction of which is affected by an unfavorable equilibrium position of the main reaction or a preceding equilibrium, wherein during the reaction one or more substances... | 05/30/2000 |
| 6060626 | Fluorine-containing ether compound A novel fluorine-containing compound having functions corresponding to those of fluorine is provided, which is stable under various conditions, excellent in compatibility with other solvents, and can be widely utilized as solvents, cosmetics, detergents, ... | 05/09/2000 |
| 6046366 | Preparation of ଲ-hydroxycarbonyl and/or ,ଲ-unsaturated carbonyl compounds The invention relates to the use of compounds of formula: [M(II)1-x M*(III)x (OH)2+x ].mH2 O (I) in which M(II) represents a divalent cation chosen from the group consisting of nickel, zinc, cobalt, magnesium or the m... | 04/04/2000 |
| 5936131 | Process for obtaining ଲ-hydroxy and/or ,ଲ-unsaturated carbonyl compounds The present invention relates to a process for obtaining ଲ-hydroxy carbonyl compounds and/or ,ଲ-unsaturated carbonyl compounds, characterized in that at least one aldehyde or one ketone is brought into contact with a solid catalyst of g... | 08/10/1999 |
| 5872263 | Process for separating formaldehyde and trioxane A process for separating a gaseous reaction mixture in the preparation of trioxane is described, in which a) the gaseous mixture leaving the reactor is scrubbed in countercurrent with an organic solvent whose boiling point is above 135° C. in which the t... | 02/16/1999 |
| 5831097 | Process for the preparation of acyloins A process for the preparation of acyloins of the general formula I ##STR1## in which Ra and Rb are the same or different and stand for hydrogen or an optionally substituted C1 -C20 alkyl, an optionally subs... | 11/03/1998 |
| 5801292 | Aldehyde process A process for condensing aldehydes where an aldehyde having an a hydrogen and having the formula R1 CHO, wherein R1 is selected from alkyl having one to twelve carbon atoms and aralkyl having one to fourteen carbon atoms, is combined... | 09/01/1998 |
| 5770762 | Process for producing 4-substituted-2-butenals Described is a process for producing a 4-substituted-2-butenal represented by the following formula (1); ##STR1## (wherein X represents an acyloxy group or halogen atom; R represents hydrogen atom, an aliphatic hydrocarbon group or an aromatic hydroc... | 06/23/1998 |
| 5434313 | Aldolisation-dehydration process An aldolisation-dehydration process is disclosed for converting an aldehyde, e.g. n-valeraldehyde, to a substituted acrolein, e.g. propyl butyl acrolein (2-propylhept-2-enal). Aldolisation and dehydration are effected in a stirred tank reactor (16; 111) u... | 07/18/1995 |
| 5386062 | Catalytic preparation of condensation products of formaldehyde A process for the catalytical preparation of condensation products of formaldehyde, in which formaldehyde or a formaldehyde-forming compound is caused to undergo reaction using a catalyst which has been produced, in the presence of an auxiliary base, from... | 01/31/1995 |
| 5382700 | Oxidative coupling of alpha, beta unsaturated aldehydes A process for producing dimeric unsaturated aldehydes from alpha, beta unsaturated aldehyde is disclosed. This process is conducted by contacting the alpha, beta unsaturated aldehyde with a copper (II) catalyst and a complexing amine catalyst in a medium ... | 01/17/1995 |
| 5382716 | Decyl alcohol mixtures, phthalic obtainable therefrom, and their use as plasticizers Mixtures of isomeric decyl alcohols obtained by hydroformylation of butadiene to produce aldehyde mixtures, condensation of the aldehyde mixtures, isolated from the reaction product, to form an aldol mixture, and isolation and hydrogenation of the aldol m... | 01/17/1995 |
| 5371299 | Process for the preparation of diethers Preparation of diethers of the formula ##STR1## wherein R is an alkyl, cycloalkyl, aryl, or aralkyl radical, by formation of an unsaturated aldehyde of the formula ##STR2## wherein R is as defined above, by means of an aldol condensation reactio... | 12/06/1994 |
| 5334770 | Process of aldol condensation by gas-phase reaction A process of aldol condensation of an active hydrogen-containing compound by a gas-phase reaction by feeding a gaseous active hydrogen-containing compound to a reactor provided with a fixed bed solid catalyst, which process is characterized in that an ind... | 08/02/1994 |
| 5298668 | Catalytic preparation of formaldehyde condensates Arycolaldehyde, glyceraldehyde, C4 - and C5 -sugars or mixtures thereof are prepared in a self-condensation of formaldehyde by reacting formaldehyde or a formaldehyde donor in the presence of a mesoionic catalyst of the formula ... | 03/29/1994 |
| 5258558 | Direct conversion of butyraldehyde to 2-ethylhexanol-1 Solid solutions of magnesium oxide-aluminum oxide related to hydrotalcite and what previously has been referred to as synthetic hydrotalcites, have been prepared with a surface area in excess of 250 m2 /g, especially at low Mg/Al atom ratios. S... | 11/02/1993 |
| 5254743 | Solid bases as catalysts in aldol condensations Solid solutions of a class of divalent metal oxides and a class of trivalent metal oxides resulting from calcination of layered double hydroxides related to hydrotalcite have been prepared with a surface area in excess of 150 m2 /g. Such high s... | 10/19/1993 |
| 5254742 | Process for preparing 2-hexene-1,6-dial A process for preparing 2-hexene-1,6-dial comprising dimerizing 2-propenal in the presence of an organometallic compound of the group VIII metal. The desired compound can be obtained under mild conditions with industrial advantages.... | 10/19/1993 |
| 5250710 | Dihydropyran derivatives, processes for preparation and use The present invention relates to dihydropyran derivatives, processes for preparing, and processes of using the derivatives. The derivatives are prepared by condensation of lithium dienolate of prenal with an aldehyde or a ketone. The pyran derivative prep... | 10/05/1993 |
| 5243081 | Aldol condensation dehydration catalyst, a process for preparing the same and a process for preparing an aldol condensation dehydrate using the process The present invention provides an aldol condensation dehydration catalyst, a process for preparing the same comprising reacting an aluminium salt with at least one magnesium compound selected from the group consisting of magnesium oxide and magnesium hydr... | 09/07/1993 |
| 5235118 | Continuous process for the preparation of 2-ethyl-2-(hydroxymethyl)hexanal and 2-butyl-2-ethyl-1, 3-propanediol Disclosed is a continuous process for the manufacture of 2-ethyl-2-(hydroxymethyl)hexanal wherein 2-ethylhexanal, formaldehyde and a tertiary amine are continuously fed to a reaction zone and crude product comprising an aqueous phase and an organic phase ... | 08/10/1993 |
| 5185478 | Manufacture of neopentyl glycol (IIA) Neopentyl glycol is made by reacting isobutyraldehyde with paraformaldehyde in the presence of a tertiary amine and cadmium or yttrium oxide; then hydrogenating the resulting reaction mixture containing hydroxypivaldehyde and at least about 20% 3-hydroxy-... | 02/09/1993 |
