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| Number | Title | Issue Date |
| 7910780 | Method for purifying terephthalaldehyde The present invention relates to a method for purifying terephthalaldehyde which comprises a first step of dissolving terephthalaldehyde containing impurities in an aromatic solvent at high temperature to prepare a solution; and a second step of quenching the soluti... | 03/22/2011 |
| 7402708 | Method for producing aqueous ortho-phthalaldehyde solutions A method for producing aqueous ortho-phthalaldehyde solutions which comprises introducing an acetal of the o-phthalaldehyde into water and subsequently setting a pH | 07/22/2008 |
| 7399889 | Process for the preparation of vanillin from agricultural waste The present invention provides a process for the preparation of Vanillin (4-hydroxy-3-methoxy benzaldehyde) by a single-step oxidation of ferulate moiety of rice straw, a renewable agricultural waste. This is a chemical method where vanillin is produced from a renew... | 07/15/2008 |
| 7393983 | Method and apparatus for separating aromatic dialdehyde The present invention relates to a method and an apparatus for continuously separating aromatic dialdehyde from a reaction mixture obtained by gas-phase oxidation of dimethylbenzene. The method for continuously separating aromatic dialdehyde includes the steps of co... | 07/01/2008 |
| 7354928 | Small molecule inhibitors targeted at Bcl-2 The present invention relates to small molecule antagonists of Bcl-2 family proteins such as Bcl-2 and/or Bcl-XL. In particular, the present invention provides non-peptide cell permeable small molecules (e.g., tricyclo-dibenzo-diazocine-dioxides) that bin... | 04/08/2008 |
| 7342046 | Gossypol co-crystals and the use thereof This invention relates to compositions comprising co-crystals of (−)-gossypol with a C1-8 carboxylic acid or C1-8 sulfonic acid which are useful as inhibitors of Bcl-2 family proteins. The invention also relates to the use of co-crystals of (... | 03/11/2008 |
| 7183442 | Purification method of terephthal aldehyde The present invention relates to a method for preparing high-purity terephthalaldehyde from terephthalaldehyde crystal containing impurities by recrystallization using an antisolvent. Low-purity terephthalaldehyde prepared by a conventional method, which contains a ... | 02/27/2007 |
| 7145043 | Non-Hazardous oxidative neutralization of aldehydes Methods, compositions, and devices for alleviating the problems of toxic discharge of aldehydes present in waste streams are disclosed. The methods relate to forming neutralized aldehydes by treating aldehydes with oxidizing agents. The oxidizing agents offer a simp... | 12/05/2006 |
| 7001880 | Method of collection of fragrance ingredient, perfume composition containing this fragrance ingredient and cosmetics containing this fragrance ingredient A method of collection of the fragrance ingredient of fragrant wood comprises extracting an essential oil ingredient by a solvent from the fragrant wood and collecting the fragrance ingredient in a vapor-phase by heating the extract, a perfume composition contains t... | 02/21/2006 |
| 6727391 | Method for processing a liquid hydroformylation discharge A liquid output from a continuous hydroformylation, which comprises essentially aldehydes, high-boiling by-products, a homogeneously dissolved hydroformylation catalyst, unreacted olefins, low-boiling by-products and dissolved synthesis gas, is worked up by a proces... | 04/27/2004 |
| 6686507 | Purification of 2-methoxy-5-trifluoromethoxybenzaldehyde A process for the purification of 2-methoxy-5-trifluoro-methoxy benzaldehyde oil in which the oil is converted to amine by reaction of a nitroaniline with the oil; the imine is isolated as a solid; and the solid imine is converted back to the 2-methoxy-5-... | 02/03/2004 |
| 6670510 | Process for preparing 2,5-dimethoxy benzaldehyde The present invention recites a process for the of 2,5-dimethoxy-benzaldehyde by reacting a 2-hydroxy-5 methoxy-benzaldehyde with a suitable metal hydroxide in the presence of a suitable solvent to make a metal salt of 2-hydroxy-5-methoxy benzaldehyde com... | 12/30/2003 |
| 6624330 | Method for stabilizing phenylacetaldehyde The present invention relates to a method for stabilizing phenylacetaldehyde by adding at least one additive, in which case the additive contains one or more polybasic carboxylic acids.... | 09/23/2003 |
| 6531634 | Non-hazardous oxidative neutralization of aldehydes Methods, compositions, and devices for alleviating the problems of toxic discharge of aldehydes present in waste streams are disclosed. The methods relate to forming neutralized aldehydes by treating aldehydes with oxidizing agents. The oxidizing agents o... | 03/11/2003 |
| 6486358 | Process for the purification and formulation of o-phthalaldehyde Improved process for the purification and formulation of o-phthalaldehyde in which crude o-phthalaldehyde, obtained by cleavage of an acetal of o-phthalaldehyde by means of acidic hydrolysis, is, optionally by adding an aqueous basic solution, adjusted to... | 11/26/2002 |
| 6437176 | Method for preparing aromatic carboxylic acids, aromatic aldehydes, and aromatic alcohols An aromatic carboxylic acid, aromatic aldehyde, and aromatic alcohol are simultaneously and efficiently prepared by liquid phase oxidizing an aromatic compound represented by formula (I) with a gas containing molecular oxygen, in a presence of a catalyst ... | 08/20/2002 |
| 6355843 | Purification of carboxaldehyde The invention is directed to the process of purifying 4'-chloro-4-biphenylcarboxaldehyde.... | 03/12/2002 |
| 6245945 | Selective hydrolysis of acetals or ketals in the presence of phthalides A process for the selective hydrolysis of acetals in the presence of phthalides comprises reacting a mixture (M) comprising a) a phthalide of the formula (I) ##STR1## where: R1,R2,R3 and R4 : are independently hydrog... | 06/12/2001 |
| 6153789 | Purification of aqueous dye solutions The present invention provides a method of purifying an aqueous dye solution having an aldehyde and/or ketone impurity including a step of reacting the impurity with a hydrazine derivative, forming a water-insoluble hydrazone compound. The hydrazone compo... | 11/28/2000 |
| 5872153 | Process for preparing aqueous o-phthalaldehyde-glutaraldehyde solutions A process for preparing an aqueous o-phthalaldehyde-glutaraldehyde solution which comprises converting an acetal of the o-phthalaldehyde in a 10 to 60% strength aqueous glutaraldehyde solution into o-phthalaldehyde at room temperature up to 100° C. by el... | 02/16/1999 |
| 5861286 | Biochemical process for preparing aromatic substances The present invention relates to a process for the preparation of aromatic substances having formula (I), characterized in that a substrate having formula (II) is subjected to an oxydation in the presence of at least one protein and at least one metal ion... | 01/19/1999 |
| 5772909 | Process for separation of vanillin from other chemicals by means of azeotropic distillation with dibenzyl ether and mixtures of vanillin and dibenzyl ether used in such process Vanillin is difficult to separate from second organic chemicals produced therewith such as parahydroxybenzaldehyde by conventional distillation or rectification because of the proximity of their boiling points. Vanillin can now be readily separated from s... | 06/30/1998 |
| 5773664 | Process for the recovery of 4-hydroxybenzaldehyde from reaction mixtures containing same A process for separating off poorly soluble by-products from reaction mixtures which are produced in the oxidation of p-cresol with oxygen or an oxygen-containing gas in methanol as solvent in the presence of alkali metal hydroxide and in the presence of ... | 06/30/1998 |
| 5510006 | Process for separation of vanillin by means of azeotropic distillation with dibenzyl ether Vanillin is difficult to separate from second organic chemicals produced therewith such as parahydroxybenzaldehyde by conventional distillation or rectification because of the proximity of their boiling points. Vanillin can now be readily separated from s... | 04/23/1996 |
| 5463137 | Process for the production of oxo products A propylene stream which contains propane as an impurity is contacted with carbon monoxide and hydrogen in the presence of a hydroformylation catalyst thereby producing a product stream containing butyraldehyde and/or n-butyl alcohol, unreacted propylene ... | 10/31/1995 |
| 5430194 | Process for improving enantiomeric purity of aldehydes The present invention relates to a process for producing an optically active aldehyde (first aldehyde) containing a reduced amount of the corresponding enantiomeric aldehyde (second aldehyde) which process comprises: (1) providing an initial solution cont... | 07/04/1995 |
| 5410090 | Airless cobalt demetalling in the cobalt flash combination catalyst cycle A method for removing cobalt values from the crude product of a cobalt-catalyzed hydroformylation reaction by the application of an airless cobalt demetalling step upstream of the stripping step of a Cobalt Flash hydroformylation catalyst recovery process... | 04/25/1995 |
| 5354909 | Processes for isolating hydroxyaldehyde isomers A process for isolating 4-hydroxybutanal and 3-hydroxy-2-methylpropanal from aqueous mixtures of the isomers is disclosed. Reaction of the aqueous mixture with a hydroxy compound in the presence of an acidic catalyst and a nonpolar organic solvent gives a... | 10/11/1994 |
| 5162577 | Process for lithiation of 1,3-bis(trifluoromethyl)benzene A novel process for the lithiation of 1,3-bis(trifluoro-methyl)benzene in a solvent is described, said process comprising carrying out the lithiation with the lithium salt of an amine of the general formula R1 R2 NH ... | 11/10/1992 |
| 5149882 | Purification of 2-chloro-5-nitrobenzaldehyde or acetals thereof 2-chloro-5-nitrobenzaldehyde or an acetal thereof is isolated from a mixture of isomers thereof at a temperature of from -10° to +140° C., by suspending the mixture of isomers in a solvent or solvent mixture.... | 09/22/1992 |
| 5077441 | Selective gossypol abatement process from oil extraction of cottonseed A method for the treatment of plant material to provide a protein-rich product and oil relatively free of gossypol. The process includes the steps of: a. contacting plant material with an aqueous monohydric alcohol solvent to extract oil and gossypol from... | 12/31/1991 |
| 5059717 | Method for purification of 2,2'-di(1,6,7-trihydroxy-3-methyl-5-isopropyl-8-naphthaldehyde) The method according to the present invention comprises purification of 2,2'-di-(1,6,7-trihydroxy-3-methyl-5-isopropyl-8-naphthaldehyde) by crystallization from a solution thereof in diethyl ether with a concentration of 0.002-0.2 g/ml by adding 0.25-3 pa... | 10/22/1991 |
| 4933499 | Process for purification of alkenyl aromatic compounds containing a benzaldehyde impurity The invention relates to a process for the purification of alkenyl aromatic compounds which contain benzaldehyde as an impurity. This process comprises steps for contacting a benaldehyde-containing alkenyl aromatic compound with a bisulphite treating agen... | 06/12/1990 |
| 4929767 | Treatment of rhodium catalysts A process for treating an organic solution of a partially deactivated solubilized rhodium-tertiary organophosphine complex hydroformylation catalyst with an organic reagent in order to improve the extractability of rhodium therefrom into an aqueous soluti... | 05/29/1990 |
| 4898990 | Process for the extraction of vanillin A process for the extraction of vanillin by means of the extraction from a vanillin-containing, water-containing, liquid mixture of substances with carbon dioxide at a temperature of 0° to 110° C. as well as a pressure of 30 to 400 bar and a subsequent ... | 02/06/1990 |
| 4847422 | Method for the production of vanillin The invention relates to a method for the production of vanillin in the form of a very pure product by oxidizing lignin contained in the wood pulping liquor. According to the invention the separation and purification of vanillin from the reaction mixture ... | 07/11/1989 |
| 4772754 | Process for the isolation of p-hydroxybenzaldehyde The invention relates to a process for the isolation of p-hydroxybenzaldehyde from the reaction mixture obtained by oxidizing p-cresol with oxygen or oxygen-containing gases in methanol in the presence of Na or K hydroxide and an Mn, Ni, Cr or Co salt. Th... | 09/20/1988 |
| 4748278 | Process for the isolation of p-hydroxybenzaldehyde The invention relates to a process for the isolation of p-hydroxybenzaldehyde from the reaction mixture obtained by oxidizing p-cresol with oxygen or oxygen-containing gases in methanol in the presence of Na or K hydroxide and an Mn, Ni, Cr or Co salt. Th... | 05/31/1988 |
| 4714783 | Separation of nitrobenzaldehyde isomers A process for separating ortho- or meta-nitrobenzaldehyde from a feed mixture comprising ortho-nitrobenzaldehyde or metal-nitrobenzaldehyde and at least one other isomer from which the ortho- or metal-isomer is to be separated. The feed mixture is contact... | 12/22/1987 |
| 4652684 | Vanillin extraction process using large pore, high silica/alumina ratio zeolites A spent lignin fermented waste-liquor solution containing vanillin is treated to remove the vanillin by contacting it with a suitable large pore zeolite.... | 03/24/1987 |