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| Number | Title | Issue Date |
| 8148582 | Glycerol vaporization method The subject matter of the present invention relates to a vaporization method of aqueous glycerol solutions in a fluidized bed containing an inert solid. The invention provides a method for vaporizing, in a single step, an aqueous glycerol solution and simultaneously... | 04/03/2012 |
| 8084651 | Process for purification of glycerol A process for the recovery of glycerol comprises contacting an aqueous feed composition that comprises water, glycerol, and at least one contaminant with a solvent extractant comprising at least one C5-C8 alkanol, optionally in admixture with at least one alkane, to... | 12/27/2011 |
| 7956224 | Palladium catalyzed hydrogenation of bio-oils and organic compounds The invention provides palladium-catalyzed hydrogenations of bio-oils and certain organic compounds. Experimental results have shown unexpected and superior results for palladium-catalyzed hydrogenations of organic compounds typically found in bio-oils. ... | 06/07/2011 |
| 7868212 | Method for preparing 1,2-propanediol by hydrogenolysis of glycerol The invention relates to a method for preparing 1,2-propanediol by reacting glycerol, which has a purity of at least 95 wt %, with hydrogen at a hydrogen pressure from 20 to 100 bar and a temperature from 180 to 240° C. in the presence of a catalyst, which comprise... | 01/11/2011 |
| 7718832 | Combination catalytic process for producing ethanol from synthesis gas A catalytic process selectively produces ethanol by contacting synthesis gas (syngas), composed primarily of hydrogen and carbon monoxide, with three catalysts within a reactor. The first catalyst is a hydrogenation promoter comprising Cu—Zn, Mo or Fe with an opti... | 05/18/2010 |
| 7718833 | Purification of glycerin obtained as a bioproduct from the transesterification of triglycerides in the synthesis of biofuel Methods for purifying glycerin contaminated with one or more lower boiling alcohols such as methanol, ethanol, straight, branched or cyclic C3-C6 alcohols, and the like. The methods are particularly useful for purifying crude glycerin phases recovered from the synth... | 05/18/2010 |
| 7534923 | Method for purification of glycerol from biodiesel production A method for purification of crude glycerol, especially crude glycerol derived from biodiesel production using alkaline catalysts. The method comprises combining the crude glycerol with acid, separating a glycerol layer, and treating the glycerol layer to decolorize... | 05/19/2009 |
| 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 |
| 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 |
| 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 |
| 7211699 | Purification of biochemically derived 1,3-propanediol The invention discloses a hydrogenation process for removing impurities and controlling acid for use in downstream processing of biochemically-derived 1,3-propanediol. Preferably, the biochemically-derived 1,3-propanediol, before the contacting, has an initial color... | 05/01/2007 |
| 7164048 | High-purity polyalkylene glycols and preparation thereof A process is described for purifying polyalkylene glycols obtained by adding alkylene oxide to alkylene glycol, in which, after addition is complete, the resultant polyalkylene glycol is treated at a pH of >7 with a bleaching agent selected from the group consisting... | 01/16/2007 |
| 7126032 | Purification of glycerin A process for purifying glycerin recovered as a byproduct of biodiesel production comprises heating a glycerin effluent stream containing a low molecular weight alcohol, water and fatty acid esters of the low molecular weight alcohol to cause transesterification of ... | 10/24/2006 |
| 7098368 | Hydrogenation of biochemical derived 1,3 -propanediol The invention discloses a hydrogenation process for removing impurities and controlling acid for use in downstream processing of biochemically-derived 1,3-propanediol. Preferably, the biochemically-derived 1,3-propanediol, before the contacting, has an initial color... | 08/29/2006 |
| 7084311 | Hydrogenation of chemically derived 1,3-propanediol Disclosed is a process comprising contacting chemical 1,3-propanediol with hydrogen in the presence of a hydrogenation catalyst. Preferably, the chemical 1,3-propanediol, before the contacting has an initial color and, after the contacting, has a color that is lower... | 08/01/2006 |
| 7038092 | Purification of chemical 1,3-propanediol Disclosed is a process comprising contacting chemical 1,3-propanediol with hydrogen in the presence of a hydrogenation catalyst. Preferably, the chemical 1,3-propanediol, before the contacting has an initial color and, after the contacting, has a color that is lower... | 05/02/2006 |
| 7018539 | Treatment of shipboard-generated oily wastewaters A process and apparatus for treating oily wastewater, such as bilge water or ballast water, generated on a ship. The process uses a combination of a centrifugal separation step and a membrane separation step, such as an ultrafiltration step. The membrane separation ... | 03/28/2006 |
| 6909022 | Process of removing organic halogen-containing compounds The present invention relates to a process of removing organic halogen-containing compounds from a liquid stream mainly containing one or more of the compounds selected from the group consisting of glycol, water and alcohol, which process involves contacting the str... | 06/21/2005 |
| 6867337 | Process for producing glycerin A process for producing glycerin is comprised of the steps of: (1) contacting a fat with water at a temperature and pressure sufficient to produce hydrolyzed fat and a sweet water stream comprised of water, fat and glycerin; (2) introducing the sweet water stream in... | 03/15/2005 |
| 6784326 | Process for improving stability of glycerin A process for inhibiting the oxidative degradation of glycerin involving adjusting the pH of glycerin to a range of either: (a) from about 3.5 to about 5.0; or (b) to from about 10.0 to about 12.0. ... | 08/31/2004 |
| 6603048 | Process to separate 1,3-propanediol or glycerol, or a mixture thereof from a biological mixture A process is provided to separate 1,3-propanediol, glycerol, or a mixture of 1,3-propanediol and glycerol from a biological mixture using a molecular sieve.... | 08/05/2003 |
| 6586642 | Color number improvement in polyhydric alcohols by hydrogenation A process for greatly improving the color index of polyhydric alcohols, especially trimethylolpropane, by hydrogenation comprises using, in the hydrogenation, an alcohol which has already been purified by distillation. The catalysts used are those convent... | 07/01/2003 |
| 6538164 | Recovery process for volatile compounds from solids in aqueous solution Volatile compounds may be economically recovered from solids present in aqueous solution by subjecting the solution to rapid separation where the volatilization occurs in a flash, spray, or fluid bed, or mechanically agitated dryers. Rapidly separating th... | 03/25/2003 |
| 6384243 | Method for producing natural diol-1,3 derivatives and corresponding natural 1,3-dioxane derivatives An unsaturated fatty acid precursor of a natural 1,3-diol derivative, which precursor is the same as that which is naturally present in a cider apple, is enzymatically converted to the natural 1,3-diol derivative.... | 05/07/2002 |
| 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 |
| 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 |
| 6265625 | Isolation of glycols This invention relates to a process for preparing and isolating glycols and to a thin-film evaporator which is used in carrying out the process.... | 07/24/2001 |
| 6060627 | Polyol purification A water and allylic compound containing propoxylated glycerin stream is reduced in water content by evaporation and flashed at reduced pressure and elevated temperature to reduce the water content to 1000 ppm or less, and thereafter stripping allylic impu... | 05/09/2000 |
| 5962749 | Process for the removal of alkalinity in the manufacture of polyether polyols and the reuse of this alkalinity in the manufacture of polyether polyols This invention relates to a process for the purification of polyether polyols. This process enables the removal of residual alkaline metal catalyst from produced polyether polyol. It comprises a) adding glycerine to a polyether polyol that contains Group ... | 10/05/1999 |
| 5763692 | Process for the preparation of recyclate polyols having a low amine content A process for preparing a recyclate polyol obtained from glycolysis of polyurethanes and/or polyurea-polyurethanes comprises reacting scrap polyurethane and/or polyurea-polyurethane with a short-chain compound containing at least 2 OH groups in the presen... | 06/09/1998 |
| 5723696 | Process for the production of polyglycerols Glycerol, glycidol, glycerol carbonate or 2,2-dimethyl-1,3-dioxolane-4-methanol is polymerized into preponderantly linear oligomers at 150° C. to 350° C. in the presence of a catalyst, selected from RbF, CsF and/or KF impregnated on alumina and zir... | 03/03/1998 |
| 5710350 | Process for the production of diglycerol A process for preparing diglycerol in high concentrations and high yields by partially reacting glycerol in the presence of an alkaline catalyst to form a reaction mixture containing from 10 to 15% by weight of diglycerol and separating the unreacted glyc... | 01/20/1998 |
| 5679223 | Method for separating and purifying catechol mixtures An extractive distillation process using a high boiling polyol such as glycerol is employed for separating high purity catechol, 3-methylcatechol and 4-methylcatechol from a high boiling, pitch-like dihydric phenol fraction. Fractional distillation first ... | 10/21/1997 |
| 5527974 | Process for the purification of glycerol water The glycerol water (sweet water) accumulating in the high-pressure hydrolysis of natural fats and oils with steam into fatty acid and glycerol is continuously purified. Fats larger than 100 μm in diameter are separated from the aqueous phase in a plate-t... | 06/18/1996 |
| 5421965 | Separation of glycerine from bis(hydroxymethyl)tetrahydrofuran by azeotropic distillation Glycerine is difficult to separate from bis(hydroxymethyl)tetrahydrofuran by conventional distillation or rectification because of the proximity of their boiling points. Glycerine can be readily separated from bis(hydroxymethyl)tetrahydrofuran by azeotrop... | 06/06/1995 |
| 5198077 | Recovery of glycerine from mannitol, lactose or lactitol by azeotropic distillation Glycerine cannot be easily separated from mannitol, lactose or lactitol by atmospheric or reduced pressure distillation because of their high boiling points. Glycerine can be readily separated from mannitol, lactose or lactitol by azeotropic distillation.... | 03/30/1993 |
| 5190622 | Recovery of glycerine from sorbitol by azeotropic distillation Glycerine cannot be easily separated from sorbitol by atmospheric or reduced pressure distillation because of their high boiling points. Glycerine can be readily separated from sorbitol by azeotropic distillation. Typical effective agents are biphenyl, be... | 03/02/1993 |
| 4990695 | Process for purifying crude glycerol The invention provides a process for purifying crude glycerol such as splitters crude, soaplye crude and methanolysis crude which comprises a microfiltration step over a filter material on a ceramic support preferably comprising alumina. Preferably the fi... | 02/05/1991 |
| 4980033 | Recovery of triethylene glycol from triols by azeotropic distillation Triethylene glycol cannot be easily separated from glycerine or 1,2,4-butanetriol by atmospheric or reduced pressure distillation because of the closeness of their boiling points. Triethylene glycol can be readily separated from glycerine or 1,2,4-butanet... | 12/25/1990 |
| 4975158 | Recovery of glycerine from polyols by azeotropic distillation Glycerine cannot be easily separated from triethylene glycol and 1,2,4-butanetriol by atmospheric or reduced pressure distillation because of the closeness of their boiling points. Glycerine can be readily separated from triethylene glycol and 1,2,4-butan... | 12/04/1990 |
