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| Number | Title | Issue Date |
| 8044249 | Specific branched aldehydes, alcohols, surfactants, and consumer products based thereon A process for preparing a detergent alcohol mixture comprising the steps of providing one or more poly-branched poly-olefins, wherein the poly-branched poly-olefins must contain one non-branched terminal olefin and one or more additional branched olefins in the mole... | 10/25/2011 |
| 8003830 | Method for improving the color number of trimethylolpropane The present invention relates to a method for the production of trimethylolpropane with a low color number by treatment with activated carbon. ... | 08/23/2011 |
| 7569736 | Process for producing monopentaerythritol of high purity and monopentaerythritol produced by the process The invention relates to a process for producing monopentaerythritol of high purity and monopentaerythritol produced by the process. Formaldehyde is reacted with acetaldehyde in an aqueous solution in the presence of a strongly basic hydroxide in a conventional way.... | 08/04/2009 |
| 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 |
| 7335689 | Dihydroxyl compounds and compositions for cholesterol management and related uses The present invention relates to novel dihydroxyl compounds, compositions comprising hydroxyl compounds, and methods useful for treating and preventing a variety of diseases and conditions such as, but not limited to aging, Alzheimer's Disease, cancer, cardiovascula... | 02/26/2008 |
| 7321070 | Synthesis of isotopically labeled R- or S-[C, H] glycerols The present invention is directed to asymmetric chiral labeled glycerols including at least one chiral atom, from one to two 13C atoms and from zero to four deuterium atoms bonded directly to a carbon atom, e.g., (2S) [1,2-13C2]glyce... | 01/22/2008 |
| 7307194 | Method for producing 1, 6 hexane diol The present invention provides a process for preparing 1,6-hexanediol from a carboxylic acid mixture which comprises adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols and is obtained as a by-product in the oxidation of cyclohexane to cyclo... | 12/11/2007 |
| 7301058 | Method for increasing yield in the production of polyvalent alcohols by splitting by-products containing acetal The invention relates to a method for increasing yield in the production of polyvalent alcohols, especially trimethylolpropane, obtained by condensing formaldehyde with a higher aldehyde. According to the inventive method, acid treatment is carried out on a mixture ... | 11/27/2007 |
| 7253326 | Method for preparing trimethylolproane The present invention relates to a method for preparing trimethylolpropane (TMP) comprising the steps of: 1) synthesizing trimethylolpropane by using n-butyl aldehyde, an aqueous solution of formaldehyde and an aqueous solution of alkali metal hydroxide through aldo... | 08/07/2007 |
| 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 |
| 7211701 | Preparation of trimethylolpropane The present invention relates to a process for preparing trimethylolpropane having a low APHA color number. ... | 05/01/2007 |
| 7157607 | Manufacture of polytrimethylene ether glycol A process of manufacture of polytrimethylene ether glycol comprising: (a) polycondensing reactant comprising diol selected from the group consisting of 1,3-propanediol, 1,3-propanediol dimer and 1,3-propanediol trimer or mixtures t... | 01/02/2007 |
| 7087800 | Process for producing a polyol A process for producing a polyol by reacting an aliphatic aldehyde with formaldehyde in the presence of a basic catalyst, which comprises a step of concentration which comprises removing water and unreacted formaldehyde from a reaction liquid by distillation; a step... | 08/08/2006 |
| 7060861 | Method for hydrating poly-or monomethylol alkanals In a process for the catalytic hydrogenation of a polymethylolalkanal or a monomethylolalkanal of the formula (I) where R may be identical or different and are each a substituted or unsubstituted aliphatic hydroc... | 06/13/2006 |
| 7057080 | Color index of multivalent alcohols by hydrogenation A process is provided for improving the color number of polyhydric alcohols, especially trimethylolpropane, by catalytic hydrogenation, the polyhydric alcohol used in the hydrogenation having been purified by distillation following its preparation, wherein the hydro... | 06/06/2006 |
| 6949684 | Process for preparing 1,2,4-butanetriol An object of the present invention is to provide a process wherein 1,2,4-butanetriol can be obtained safely, easily and inexpensively without causing problems concerning wastewater. A malic diester, 3-hydroxy-γ-butyrolactone or 3,4-dihydroxybutanoate represented by... | 09/27/2005 |
| 6809224 | Method for the separation of formaldehyde from a reaction mixture containing polyols by the addition of solvents before and/or during the distillation Formaldehyde is removed by distillation from reaction solutions containing a methlolated alkanal which was obtained from the reaction of formaldehyde with an alkanal which has at least one acidic hydrogen atom α to the carbonyl function or from the reaction of a 2-... | 10/26/2004 |
| 6787677 | Hydrogenation of carbonyl compounds In a process for the catalytic hydrogenation of a carbonyl compound or a mixture of two or more carbonyl compounds in the presence of catalyst tablets which comprise an inorganic, TiO2-containing support and, as active component, copper or a mixture of co... | 09/07/2004 |
| 6727395 | Method for producing hexanediol A process for preparing 1,6-hexanediol from a carboxylic acid mixture comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols which is obtained as by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol after water ex... | 04/27/2004 |
| 6692616 | Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation A process is disclosed for the purification, by distillation, of trimethylolpropane originating from the hydrogenation of 2,2-dimethylolbutanal, said process including the following steps: (a) reaction of n-butyraldehyde with formaldehyde in the presence o... | 02/17/2004 |
| 6646170 | Intermediates for the synthesis of ether compounds The present invention relates to novel ether compounds, compositions comprising ether compounds, and methods useful for treating and preventing cardiovascular diseases, dyslipidemias, dysproteinemias, and glucose metabolism disorders comprising administer... | 11/11/2003 |
| 6593502 | Process for the preparation of polyols The invention relates to a process for the preparation of polyols having 3 or 4 hydroxyl groups, from an aldehyde and formaldehyde in the presence of water, followed by hydrogenation of the aldolisation product in the presence of a hydrogenation catalyst ... | 07/15/2003 |
| 6586641 | Method for the decomposition of high boiling by-products produced in the synthesis of polyhydric alcohols A process is provided for increasing the yield in the preparation of polyhydric alcohols obtained from methylolated alkanals by hydrogenation, wherein derivatives of these alcohols are decomposed by adding 5 ppm to 1% by weight, preferably 100 to 1000 ppm... | 07/01/2003 |
| 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 |
| 6538163 | Method for reduction of substituted malonates to diols A method for reducing a malonate having the formula R1 R2 C(CO2 R3)(CO2 R4) to a diol having the formula R1 R2 C(CH2 OH)2 comprising treating said mal... | 03/25/2003 |
| 6506947 | Fluorinated diol and method for the production thereof The subject-matter of the invention is a fluorinated diol and its process of preparation. The fluorinated diol corresponds to the formula (I): Cn F2n+1 --A--CH2 OCH2 --C(CH2 OH)2 --R in which n has a... | 01/14/2003 |
| 6441254 | Process for preparing trimethylol compounds and formic acid The present invention relates to a process for preparing trimethylol compounds and formic acid by reaction of formaldehyde and aldehydes in the presence of a nitrogen base and distillation of the resulting reaction mixture in the presence of an auxiliary.... | 08/27/2002 |
| 6433192 | Method for producing mixtures of 1,4-butanediol, tetrahydrofuran and γ-butyrolactone In a process for preparing 1,4-butanediol, tetrahydrofuran and γ-butyrolactone by oxidation of butane to give a product stream comprising maleic anhydride, absorption of maleic anhydride from the product stream using a high-boiling alcohol to give a liqu... | 08/13/2002 |
| 6387033 | Preparation of new layered double hydroxides exchanged with osmate for asymmetric dihydroxylation of olefins to vicinal diols LDH-osmate of the formula [MII.sub.(1-x) MIIIx (OH)2 ][OsO42- ]x/2.zH2 O wherein MII is a divalent cation selected from the group consisting of Mg2+, ... | 05/14/2002 |
| 6376725 | 1,3 butylene glycol of high purity and method for producing the same High purity 1,3-butylene glycol obtained from acetaldol by a liquid phase hydrogen reduction method, by adding a base to crude 1,3-butylene glycol free of high-boiling material, heat-treating the mixture and then distilling off 1,3-butylene glycol; and di... | 04/23/2002 |
| 6369281 | Process for the production of 2-butyl-2-ethyl-1,3-propanediol The present invention concerns a process for producing 2-butyl-2-ethyl-1,3-propanediol. According to the process, a reaction mixture is formed, containing 2-ethylhexanal and formaldehyde, into which an hydroxide compound is fed, whereby 2-ethylhexanal and... | 04/09/2002 |
| 6365789 | Pulverulent sorbitol and its process of preparation The invention relates to a pulverulent sorbitol, characterized in that it exhibits a hygroscopicity value, determined according to a test A, of less than 2%, preferably of less than 1.7%, and a specific surface, determined according to the BET method, at ... | 04/02/2002 |
| 6350923 | Hydrogenation of aldehydes A dialdehyde, trialdehyde or tetraldehyde or at least two thereof as aldehyde are hydrogenated by bringing into contact at least: the aldehyde; a catalyst comprising at least one metal selected from the group consisting of nickel, cobalt and copper in chemical... | 02/26/2002 |
| 6344592 | Method of producing highly pure trimethylolpropane A method of producing a highly pure trimethylolpropane from a crude trimethylolpropane obtained by a reaction of n-butyl aldehyde and formaldehyde in the presence of a basic catalyst in a two-stage process of an aldol condensation and a crossed Cannizzaro... | 02/05/2002 |
| 6316679 | Treatment of a composition comprising a trimethylolalkane bis-monolinear formal A process for treating a composition containing a substantial proportion of trimethyflolpropane bis-monolinear formal (TMP-BMLF) or trimethylolethane bis-monolinear formal (TME-BMLF), e.g., a heavy ends residue obtained from the purification of a crude tr... | 11/13/2001 |
| 6294705 | Method for producing alkali metal alcoholates The invention relates to a method for producing alkali metal alcoholates by reacting alcohol with alkali metal in an aprotic, organic solvent in the presence of an H acceptor such as e.g. isoprene, butadiene, styrene or methyl styrene.... | 09/25/2001 |
| 6288286 | Method for producing hexanediol-1,6 A process for preparing 1,6-hexanediol from a carboxylic acid mixture obtained as by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol with oxygen or oxygen-comprising gases and by aqueous extraction of the reaction mixture and compris... | 09/11/2001 |
| 6288287 | Process for preparing glycerol A process for preparing a glycerol from a crude glycerol comprising a glycerol, a diol and water, comprising feeding the crude glycerol to a preparation apparatus comprising two or more, serially connected flash towers and a distillation tower connected t... | 09/11/2001 |
| 6278030 | Process for preparing alcohols by the Oxo process An improved process for preparing alcohols by the Oxo process. More particularly this invention relates to an improvement in the hydrogenation step of the Oxo process characterized in the use of certain bulk multimetallic hydrogenation catalysts comprised... | 08/21/2001 |
| 6274778 | Pulverulent sorbitol and its process of preparation The invention relates to a pulverulent sorbitol, characterized in that it exhibits a hygroscopicity value, determined according to a test A, of less than 2%, preferably of less than 1.7%, and a specific surface, determined according to the BET method, at ... | 08/14/2001 |
