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Class Information
Number: 568/869
Name: Organic compounds -- part of the class 532-570 series > Organic compounds (class 532, subclass 1) > Oxygen containing (e.g., perchlorylbenzene, etc.) > Hydroxy containing (h of -oh may be replaced by a group ia or iia light metal) > Acyclic > Polyhydroxy > Purification or recovery > Of glycerol
Description: Processes wherein glycerol is separated.

Sub-classes under this class:

Class Number Class Name Patents
568/870 Ion exchange or sorbent material utilized 14

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8686192 Method for the conversion of cellulose and related carbohydrate materials to low-molecular-weight compounds Apr. 1, 2014
8648219 Method for purifying glycerin and products obtained therefrom Feb. 11, 2014
8524945 Method for producing acrolein comprising the regeneration of a raw glycerin phase Sep. 3, 2013
8492597 Production of propylene glycol from glycerine Jul. 23, 2013
8445733 1,3 butylene glycol with reduced odor May. 21, 2013
8383864 Method for the conversion of cellulose and related carbohydrate materials to low-molecular-weight compounds Feb. 26, 2013
8227648 Combined temperature controlled water adsorption and two stage heat pump process for fuel ethanol dehydration Jul. 24, 2012
8148582 Glycerol vaporization method Apr. 3, 2012
8084651 Process for purification of glycerol Dec. 27, 2011
8067646 Combined temperature controlled adsorption and heat pump process for fuel ethanol dehydration Nov. 29, 2011
8022257 Methods for producing polyols using crude glycerin Sep. 20, 2011
7998317 Glycerol (medical grade) preparation method using a by-product of a bio-diesel process Aug. 16, 2011
7955402 Method for recycling and exploitation of the glycerin obtained in the production of biodiesel Jun. 7, 2011
7956224 Palladium catalyzed hydrogenation of bio-oils and organic compounds Jun. 7, 2011
7893305 Separation of diols from a mixture comprising diols and polyols Feb. 22, 2011
7868212 Method for preparing 1,2-propanediol by hydrogenolysis of glycerol Jan. 11, 2011
7737292 Process for the preparation of organopolysiloxanes Jun. 15, 2010
7718832 Combination catalytic process for producing ethanol from synthesis gas May. 18, 2010
7718833 Purification of glycerin obtained as a bioproduct from the transesterification of triglycerides in the synthesis of biofuel May. 18, 2010
7534923 Method for purification of glycerol from biodiesel production May. 19, 2009
7342142 Hydrogenation of polytrimethylene ether glycol Mar. 11, 2008
7321070 Synthesis of isotopically labeled R- or S-[.sup.13C, .sup.2H] glycerols Jan. 22, 2008
7235183 Glycerine foots salt separation system Jun. 26, 2007
7211699 Purification of biochemically derived 1,3-propanediol May. 1, 2007
7164048 High-purity polyalkylene glycols and preparation thereof Jan. 16, 2007
7126032 Purification of glycerin Oct. 24, 2006
7098368 Hydrogenation of biochemical derived 1,3 -propanediol Aug. 29, 2006
7084311 Hydrogenation of chemically derived 1,3-propanediol Aug. 1, 2006
7038092 Purification of chemical 1,3-propanediol May. 2, 2006
6909022 Process of removing organic halogen-containing compounds Jun. 21, 2005
6867337 Process for producing glycerin Mar. 15, 2005
6784326 Process for improving stability of glycerin Aug. 31, 2004
6603048 Process to separate 1,3-propanediol or glycerol, or a mixture thereof from a biological mixture Aug. 5, 2003
6586642 Color number improvement in polyhydric alcohols by hydrogenation Jul. 1, 2003
6538164 Recovery process for volatile compounds from solids in aqueous solution Mar. 25, 2003
6384243 Method for producing natural diol-1,3 derivatives and corresponding natural 1,3-dioxane derivatives May. 7, 2002
6344592 Method of producing highly pure trimethylolpropane Feb. 5, 2002
6288287 Process for preparing glycerol Sep. 11, 2001
6265625 Isolation of glycols Jul. 24, 2001
6060627 Polyol purification May. 9, 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 Oct. 5, 1999
5763692 Process for the preparation of recyclate polyols having a low amine content Jun. 9, 1998
5723696 Process for the production of polyglycerols Mar. 3, 1998
5710350 Process for the production of diglycerol Jan. 20, 1998
5679223 Method for separating and purifying catechol mixtures Oct. 21, 1997
5527974 Process for the purification of glycerol water Jun. 18, 1996
5421965 Separation of glycerine from bis(hydroxymethyl)tetrahydrofuran by azeotropic distillation Jun. 6, 1995
5198077 Recovery of glycerine from mannitol, lactose or lactitol by azeotropic distillation Mar. 30, 1993
5190622 Recovery of glycerine from sorbitol by azeotropic distillation Mar. 2, 1993
4990695 Process for purifying crude glycerol Feb. 5, 1991

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