Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 8143456 | Method of reducing methanol in recycle streams in bisphenol-A production process Methods for removing methanol from acetone recycle streams during bisphenol-A production, thereby avoiding the deactivation of catalyst, by distilling an acetone-methanol-water comprising mixture such that acetone is taken overhead in form of a relatively pure disti... | 03/27/2012 |
| 8044248 | Treatment of bisphenol-A residue streams In a method of reducing the viscosity of a residue stream from the production of bisphenol-A, the residue stream is combined with at least one of (a) a bottoms stream comprising polyalkylaromatic compounds and remaining after the fractionation of an effluent from an... | 10/25/2011 |
| 7989666 | Method for preparing bisphenol A The present invention discloses a method for preparing bisphenol A, comprising the following steps: transferring phenol and acetone into a reaction zone charged with condensation catalyst, obtaining a stream containing bisphenol A after reaction; transferring the ob... | 08/02/2011 |
| 7923586 | Method for stabilizing a cation exchange resin prior to use as an acid catalyst and use of said stabilized cation exchange resin in a chemical process A method for preventing the degradation of a catalyst during storage of the catalyst and prior to using the catalyst in a chemical process comprising treating the catalyst with an antioxidant and storing the treated catalyst until further use. The stabilized treated... | 04/12/2011 |
| 7820866 | Process for the manufacture of polyphenols An improved process for the manufacture of a polyphenol compound such as bisphenol-A by introducing into a reaction zone a phenolic compound reactant, a carbonyl compound reactant, and a catalyst promoter comprising bismethylthiopropane added to the reaction system ... | 10/26/2010 |
| 7598424 | Process for production of bisphenol A An object of present invention is to provide a process of producing bisphenol A, and more particularly a process of producing bisphenol A having high purity and an excellent hue. In the present invention, in a crystallization step to form the slurry containin... | 10/06/2009 |
| 7491855 | Integrated process for the production of bisphenol A from cumene hydroperoxide Use of a specific combination of catalysts for the first and second steps of the process for the conversion of CHP to BPA provides high yields of BPA and low impurity yields, without a requirement for the intermediate purification steps. In the first step, CHP is cl... | 02/17/2009 |
| 7371902 | Methods for purifying p,p-bisphenol-A Methods for purifying a p,p-bisphenol A generally include distilling a feed stream comprising p,p-BPA in a distillation column at a pressure less than or equal to 20 millibars. The distillation column separates the bisphenol feed stream to produce a light fraction, ... | 05/13/2008 |
| 7348439 | 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidine compounds and methods for making them Compounds and methods for preparing 2-aryl-3-(aminoaryl)-3-(hydroxyaryl)phthalimidines having a formula of: wherein R1 is independently selected from a group consisting of a hydrocarbyl radical, a nitro radical, ... | 03/25/2008 |
| 7335802 | Methods of preparing branched aliphatic alcohols Systems and methods to produced branched aliphatic alcohols are described. Systems may include a dehydrogenation-isomerization unit, an olefin dimerization unit, an olefin isomerization unit, a hydroformylation unit, a dehydrogenation unit, a hydrogenation unit and/... | 02/26/2008 |
| 7329720 | Methods for increasing the mean particle size of 2-hydrocarbyl-3,3-bis(hydroxyaryl)phthalimidines A method for increasing a mean particle size of a 2-hydrocarbyl-3,3-bis(hydroxyaryl)phthalimidine is provided. The method comprises forming a mixture comprising a feedstream of the 2-hydrocarbyl-3,3-bis(4-hydroxyaryl)phthalimidine, and a solvent composition comprisi... | 02/12/2008 |
| 7321069 | Process for preparing bisphenols A process for preparing aromatic bisphenols, wherein the method comprises reacting an aromatic hydroxy compound with an alkylating agent having a functionality of two in the presence of a catalyst system. The catalyst system used for the process is selected from the... | 01/22/2008 |
| 7227046 | Method for making bisphenol A The continuous process for manufacturing bisphenol A according to the invention, by reacting phenol and acetone in the presence of a strong acid catalyst and a co-catalyst, is carried out using as co-catalyst a dithio ether of general formula: | 06/05/2007 |
| 7193027 | Functionalized silicone resins, methods for their preparation, and use as catalysts Disclosed herein are silicone resins comprising structural units of the formulae: and at least one structural unit selected from the group consisting of: | 03/20/2007 |
| 7163582 | System and method of producing Bisphenol-A (BPA) using direct crystallization of BPA in a single crystallization stage A system and method are provided for producing Bisphenol-A (BPA) using direct crystallization of BPA in a single crystallization stage. In one embodiment the method comprises reacting Phenol and Acetone in the presence of a catalyst to form a product solution includ... | 01/16/2007 |
| 7154010 | Integrated process for the production of bisphenol A from cumene hydroperoxide Use of a specific combination of catalysts for the first and second steps of the process for the conversion of CHP to BPA provides high yields of BPA and low impurity yields, without a requirement for the intermediate purification steps. In the first step, CHP is cl... | 12/26/2006 |
| 7132575 | Process for the synthesis of bisphenol A process for the production of a bisphenol comprises reacting a feed comprising a phenol, a ketone and water in the presence of an ion exchange resin catalyst to produce an effluent; determining the para—para bisphenol selectivity of the reaction; and adjusting t... | 11/07/2006 |
| 7129382 | Process for producing bisphenol A There is disclosed a process for producing bisphenol A by subjecting phenol and acetone to condensation reaction in the presence of a catalyst composed of an acid type ion exchange resin which is modified in part with a sulfur-containing amine compound, wherein the ... | 10/31/2006 |
| 7112703 | Production of bisphenol-A with reduced sulfur content A process for the production of bisphenol-A having low concentration of sulphur is disclosed. The process comprise a) reacting phenol with acetone in the presence of a sulfonic acid ion exchanger to form a product mixture containing water, bisphenol-A/phenol adduct,... | 09/26/2006 |
| 7112702 | Process for the synthesis of bisphenol A commercial scale continuous process for the production of a bisphenol comprising reacting a phenol and a ketone in the presence of a modified ion exchange resin catalyst, wherein said modified ion exchange resin comprises a crosslinked gellular acid functionalized... | 09/26/2006 |
| 7109385 | Process for producing phenol A process for producing a phenol product generally comprises a first step comprising reacting in a first reactor a feed stream comprising cumene hydroperoxide and water with an acid catalyst to produce an effluent comprising the phenol product, acetone, and at least... | 09/19/2006 |
| 7078573 | Dewatering of circulatory flows in the production of bisphenol A A process for producing bisphenol A is disclosed. The process entails a) reacting phenol with acetone in the presence of an acidic catalyst to form a reaction mixture that includes bisphenol A and water, and b) removing water from the reaction mixture by distillatio... | 07/18/2006 |
| 7049475 | Organic compound decomposing method Ascorbic acid and/or ascorbic acid salt is made to act together with oxygen on an organic compound. Alternatively, light radiation is applied during chemical action with oxygen so as to improve a composition efficiency of an organic compound and obtain a preferable ... | 05/23/2006 |
| 7034191 | Continuous crystallization process A continuous crystallization process comprising the steps of supplying a crystallization material containing bisphenol A to a crystallizer to form crystals of an adduct of bisphenol A and phenol or crystals of bisphenol A, subjecting the slurry discharged from the c... | 04/25/2006 |
| 7015365 | Methods for preparing cycloalkylidene bisphenols A process for forming a cycloalkylidene bisphenol comprises: reacting a cycloalkanone compound of formula: where [A] is a substituted or an unsubstituted aromatic group, R1–R4 independently repre... | 03/21/2006 |
| 6995294 | Method for producing bisphenol catalysts and bisphenols This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and... | 02/07/2006 |
| 6992228 | Method for producing bisphenol catalysts and bisphenols This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and... | 01/31/2006 |
| 6972345 | Extraction of phenol-containing effluent streams A process for extracting phenol from a phenol-containing aqueous solution is disclosed. The process entails contacting the aqueous solution with an extracting agent that comprise a mixture of 60 to 99% of methyl isobutyl ketone, 1 to 40% of anisole and 0 to 20% of m... | 12/06/2005 |
| 6960697 | System and method of producing bisphenol-A (BPA) A system and method for producing bisphenol-A (BPA) is provided. In particular, the present invention provides a system and method of producing bisphenol-A wherein the phase equilibrium behavior of a feed solution to a crystallizer is selectively controlled and adju... | 11/01/2005 |
| 6951965 | Process for purifying phenol-containing bisphenol A The process of the present invention comprises a first step in which crude molten bisphenol A containing phenol is supplied to a flash evaporator and separated into a gaseous phase comprising phenol and a liquid phase comprising bisphenol A and residual phenol, and ... | 10/04/2005 |
| 6946581 | Bisphenol compound composition having excellent thermal stability The purpose of the invention is to improve thermal stability of bisphenol compounds. The resolving means of the invention is to include a pyridine compound in bisphenol compounds. ... | 09/20/2005 |
| 6943273 | Method for producing bisphenol-A Provided is a process for producing a bisphenol A by continuously feeding phenol and acetone into a reactor unit having at least two reaction zones connected in series. In the process, an acidic cation-exchange resin partially neutralized with a sulfur-containing ni... | 09/13/2005 |
| 6939994 | Process for the production of bisphenol-A Bisphenol-A (BPA) is efficiently produced from phenol and acetone via countercurrent and multistage contact with a solid acid catalyst in the presence of an agent that enhances the removal of water of reaction from the reaction zone. A preferred contacting device is... | 09/06/2005 |
| 6933416 | Process for the production of bisphenol-A The invention provides a process for the continuous production of bisphenol-A by continuously reacting phenol using an acid catalyst resin and continuously or essentially continuously removing water from the system. Continuous removal of water allows for increased c... | 08/23/2005 |
| 6906227 | Bisphenol phenol adducts The application relates to a process for producing high-purity bis(4-hydroxyaryl)alkanes from adducts of bis(4-hydroxyaryl)alkanes and aromatic hydroxy compounds, which are obtained by acid-catalysed reaction of the aromatic hydroxy compounds with ketones. ... | 06/14/2005 |
| 6891073 | Chemical reactor system and process A method for producing bisphenol includes introducing a phenol and a ketone into a fixed, supported catalytic bed reactor system in a downflow mode, reacting the phenol and the ketone to form a reaction mixture, and recovering the bisphenol isomer from the reaction ... | 05/10/2005 |
| 6884894 | Method for producing bisphenol catalysts and bisphenols This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and... | 04/26/2005 |
| 6872859 | Process for the preparation of bisphenols with zeolites The present invention relates to a process for preparing bisphenols which comprises reacting a carbonyl compound containing at least two carbon atoms with an aromatic compound, containing a hydroxyl group and at least one hydrogen atom bound to the aromatic ring, in... | 03/29/2005 |
| 6872860 | Method for producing bisphenol catalysts and bisphenols This disclosure relates to a method for producing and using catalysts in the production of bisphenols, and in particular to a method for producing catalysts which contain poly-sulfur mercaptan promoters, and using these catalysts in the production of bisphenol-A and... | 03/29/2005 |
| 6858759 | Process for manufacture of bisphenols A method for the manufacture of bisphenols comprises introducing a combined feed stream comprising a feed stream and a recycle stream into a reactor system comprising at least one reactor containing a catalytic proportion of an acid catalyst and wherein the combined... | 02/22/2005 |
