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Class Information
Number: 568/854
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 > Polyalkylol substituted alkane (e.g., pentaerythritol, trimethylolethane, ect.) > Purification or recovery
Description: Processes which include separating the compounds from impurities or from the reaction mixture.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8710278 Process for producing polyols Apr. 29, 2014
8686197 Method for improving the color number of trimethylolpropane Apr. 1, 2014
8575401 Method for purifying crude polymethylols Nov. 5, 2013
8507734 Pharmaceutical compositions comprising monoterpenes Aug. 13, 2013
8470566 Microorganisms and methods for conversion of syngas and other carbon sources to useful products Jun. 25, 2013
8394998 Method of producing neopentyl glycol Mar. 12, 2013
8389778 Preparation of mannitol modification III Mar. 5, 2013
8354561 Trimethylolpropane color improvement Jan. 15, 2013
8293950 Method of preparing pentaerythritol Oct. 23, 2012
8143458 Processes for isolating or purifying propylene glycol, ethylene glycol and products produced therefrom Mar. 27, 2012
8013192 Process for preparing 1,3-propanediol Sep. 6, 2011
7569736 Process for producing monopentaerythritol of high purity and monopentaerythritol produced by the process Aug. 4, 2009
7569706 Glycerol derivative Aug. 4, 2009
7307194 Method for producing 1, 6 hexane diol Dec. 11, 2007
7301058 Method for increasing yield in the production of polyvalent alcohols by splitting by-products containing acetal Nov. 27, 2007
7253326 Method for preparing trimethylolproane Aug. 7, 2007
7211699 Purification of biochemically derived 1,3-propanediol May. 1, 2007
7211701 Preparation of trimethylolpropane May. 1, 2007
7157607 Manufacture of polytrimethylene ether glycol Jan. 2, 2007
7112707 Method for the isolation of trimethylolpropane from a reaction mixture Sep. 26, 2006
7098368 Hydrogenation of biochemical derived 1,3 -propanediol Aug. 29, 2006
7087800 Process for producing a polyol Aug. 8, 2006
7084311 Hydrogenation of chemically derived 1,3-propanediol Aug. 1, 2006
7057080 Color index of multivalent alcohols by hydrogenation Jun. 6, 2006
7038092 Purification of chemical 1,3-propanediol May. 2, 2006
6914164 Method for the decomposition of ammonium formates in reaction mixtures containing polyol Jul. 5, 2005
6727395 Method for producing hexanediol Apr. 27, 2004
6692616 Method for purifying trimethylolpropane, which is produced by hydrogenation, by means of continuous distillation Feb. 17, 2004
6683224 Process for the production of fatty alcohols Jan. 27, 2004
6623649 Process for removing cyclic acetals from wastewater streams Sep. 23, 2003
6586641 Method for the decomposition of high boiling by-products produced in the synthesis of polyhydric alcohols Jul. 1, 2003
6586642 Color number improvement in polyhydric alcohols by hydrogenation Jul. 1, 2003
6552232 Process for conducting aldol condensation reactions in ionic liquid media Apr. 22, 2003
6515036 Method of decomposing a polyurethane Feb. 4, 2003
6489373 Method for decomposition and recovery of polyurethane resin Dec. 3, 2002
6448455 TMP/Vapor pressure filtration Sep. 10, 2002
6441254 Process for preparing trimethylol compounds and formic acid Aug. 27, 2002
6433192 Method for producing mixtures of 1,4-butanediol, tetrahydrofuran and .gamma.-butyrolactone Aug. 13, 2002
6376725 1,3 butylene glycol of high purity and method for producing the same Apr. 23, 2002
6344592 Method of producing highly pure trimethylolpropane Feb. 5, 2002
6316679 Treatment of a composition comprising a trimethylolalkane bis-monolinear formal Nov. 13, 2001
6288287 Process for preparing glycerol Sep. 11, 2001
6288286 Method for producing hexanediol-1,6 Sep. 11, 2001
6268539 Manufacturing method of neopentyl glycol Jul. 31, 2001
6265624 Process for preparing pentane-1,5-diol Jul. 24, 2001
6265623 Process for the reductive cleavage of linear and cyclic acetals especially formals Jul. 24, 2001
6201159 Process for the continuous production of neopentyl glycol Mar. 13, 2001
6191320 Finishing of neopentyl glycol Feb. 20, 2001
6184423 Method to eliminate formic acid and acetic acid from process water in ethylene glycol plant Feb. 6, 2001
6034284 Producing method for trimethylolalkane Mar. 7, 2000

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