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| Number | Title | Issue Date |
| 7138528 | Method for crystallizing N-vinyl-2-pyrrolidone A method for purifying N-vinyl-2-pyrrolidone (NVP) is disclosed. The method comprises crystallizing NVP in the presence of added water to produce purified NVP crystals and a mother liquor, and then isolating the purified crystals. In a preferred method, 0.5 to 4 wt.... | 11/21/2006 |
| 7034060 | Polycosanols from wax The present invention provides a novel method for the preparation of a unique profile of primary aliphatic alcohols, having 24 to 30 carbon atoms, from the wax secreted by the insect Ericerus pela. Included in the present invention is the composition of matte... | 04/25/2006 |
| 6984666 | Polycosanols from wax The present invention provides a novel method for the preparation of a unique profile of primary aliphatic alcohols, having 24 to 30 carbon atoms, from the wax secreted by the insect Ericerus pela. Included in the present invention is the composition of matte... | 01/10/2006 |
| 6683116 | Polycosanols from Ericerus pela wax The present invention provides a novel method for the preparation of a unique profile of primary aliphatic alcohols, having 24 to 30 carbon atoms, from the wax secreted by the insect Ericerus pela. Included in the present invention is the composition of m... | 01/27/2004 |
| 5981810 | Process for preparing 1,4-butanediol This invention relates to a process for purifying crude 1,4-butanediol by melt crystallization and a process for preparing 1,4-butanediol by utilizing the purification process. 1,4-Butanediol is important as a material for synthesizing polyester resins, Î... | 11/09/1999 |
| 5856316 | Mixture of higher primary aliphatic alcohols, its obtention from sugar cane wax and its pharmaceutical uses A mixture of higher primary aliphatic alcohols of 22 to 38 carbon atoms can be obtained by saponifying and extracting steps with organic solvents from sugar cane wax. The mixture which contains tetracosanol, hexacosanol, heptacosanol, octacosanol, nonacos... | 01/05/1999 |
| 5663156 | Mixture of higher primary aliphatic alcohols, its obtention from sugar cane wax and its pharmaceutical uses A mixture of higher primary aliphatic alcohols of 22 to 38 carbon atoms can be obtained by saponifying and extracting steps with organic solvents from sugar cane wax. The mixture which contains tetracosanol, hexacosanol, heptacosanol, octacosanol, nonacos... | 09/02/1997 |
| 5380892 | Process for separating aliphatic straight-chain compounds having terminal functional groups from alpha-isomers thereof A process for separation of aliphatic straight-chain compounds having terminal functional groups from mixtures containing isomers thereof branched in the -position by precipitating the aliphatic, straight-chain compounds as their clathrates.... | 01/10/1995 |
| 5233098 | Method for removing and recovering fluorinated alcohol from waste gas A method for removing a perfluoroalkyl alcohol from a waste gas and recovering the perfluoroalkyl alcohol comprising the steps of bringing the waste gas into contact with an aqueous alkaline solution thereby to absorb the perfluoroalkyl alcohol into said ... | 08/03/1993 |
| 4801760 | Tertiary butyl alcohol purification The invention relates to recovery of high purity TBA from a mixture with organic impurities whereby water in amount of 1 to 5 wt % is incorporated in the mixture and pure TBA crystals are separated upon cooling and crystallization.... | 01/31/1989 |
| 4769502 | Alkynol type compounds and alcohol-separating process Alkynol type compounds of the following formula (I): ##STR1## [wherein R1 -R5 and R6 -R10 each represent hydrogen atoms or lower alkyl group and R11 represents a lower alkyl group or a group of t... | 09/06/1988 |
| 4701542 | Resolution of hemiacetals and alcohols A process for the resolution of hemiacetal compounds of the formula ##STR1## wherein A is a hydrocarbon chain containing 1 to 16 groups, the said chain optionally containing at least one heteroatom, at least one unsaturation, the assembly of the grou... | 10/20/1987 |
| 4556728 | Separation of methanol from mixtures containing it A substantially anhydrous mixture of methanol with an organic compound with which it forms an azeotrope can be separated by dissolving into the mixture lithium chloride or other suitable salt that forms a complex with methanol so as to form a homogeneous ... | 12/03/1985 |
| 4508929 | Recovery of alcohol from a fermentation source by separation rather than distillation Ethanol is recovered from fermentation products by a countercurrent extraction process which employs diethyl ether as the extraction solvent to form a diethyl ether-ethanol mixture. The ethanol is salted out by adding calcium chloride to the mixture, and ... | 04/02/1985 |
| 4322565 | Process for purifying ethers An alkyl t-alkyl ether corresponding to the formula R--O--R', wherein R is a methyl or ethyl group and R' is a t-butyl or t-amyl group, is separated from the alkanol in a reactor effluent comprising a mixture of the ether, unreacted C1 -C2... | 03/30/1982 |
| 4262149 | Process for separating alkanols from aqueous calcium chloride A C1 -C2 alkanol is separated from aqueous calcium chloride by adding a C4 or C5 hydrocarbon feed comprising an isoolefin to an aqueous solution of a calcium chloride-alkanol complex wherein the alkanol is metha... | 04/14/1981 |
| 4170601 | Method for isolating insect sex pheromones The isomers of synthetic insect sex pheromones or their precursors are separated by selectively forming an inclusion complex with the E-isomer and urea or thiourea. In order for the E-isomer complex to form selectively it is necessry that the mono-olefin ... | 10/09/1979 |
| 4013731 | Process for the manufacture of solanesol Solanesol may be produced from potato leaves by saponifying the fatty matter extracted out of potato leaves, separating the unsaponified portions of the fatty matter, molecular-distilling the unsaponified portion, and then further refining the solanesol f... | 03/22/1977 |
| 3950371 | Method of separating mixtures of fatty substances A method for separating fatty substance mixtures into components of different melting points by the "Rewetting or Hydrophilization Process," with the heat removal necessary for cooling and crystallizing higher melting fatty substance fractions being obtai... | 04/13/1976 |
| 3947504 | Separation and recovery of 3-methyl-3-butene-1-ol The 3-methyl-3-butene-1-ol contained in the oily mixture obtained in the production of isoprene by the reaction of isobutene and formaldehyde through the intermediate 4,4-dimethyl-1,3-dioxane can be isolated by adding boric acid to said mixture to form th... | 03/30/1976 |
