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| Number | Title | Issue Date |
| 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 |
| 7132294 | Functionalized small molecules for use in chemical sensors The invention provides a device for selective molecular recognition, the device comprising a sensing portion, wherein said sensing portion includes a substrate having coated thereon a layer comprising a non-volatile, small molecule compound having at least two penda... | 11/07/2006 |
| 7115785 | Method for making salts hydroxy-substituted hydrocarbons Disclosed is a method for preparing an alkali metal salt of a hydroxy-substituted hydrocarbon which comprises the steps of (i) contacting in solvent media at least one hydroxy-substituted hydrocarbon with a base comprising an alkali metal cation; and (ii) devolatili... | 10/03/2006 |
| 7087799 | Amino group containing phenol derivative An object of the present invention is to provide a material which resolves the drawbacks associated with polyimide polymers, and yet retains the advantages offered by conventional polyimide polymers. An amino group containing phenol derivative of the present ... | 08/08/2006 |
| 7078556 | Antibiotics Cyan-416 A, Cyan-416 B, Cyan-416 C, Cyan-416 D and Cyan-416 E, and ester derivatives of Cyan-416 B The invention relates to new antibiotics designated Cyan-416A, Cyan 416B, Cyan-416C, Cyan-416D and Cyan-416E to their production by fermentation of Acremonium sp. NRRL 30631 to methods for recovery and concentration from the crude solutions, and to a process ... | 07/18/2006 |
| 7067704 | Process for purifying bisphenol-a Bisphenol-A is purified in a process which comprises the following steps: a) cooling a liquid mixture comprising bisphenol-A and water in a bisphenol-A crystallizer to form bisphenol-A crystals in a liquid phase; b) separating the bisphenol-A crystals from the liqui... | 06/27/2006 |
| 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 |
| 6960641 | Method of making block copolymers by solid state polymerization A method of preparing block copolymers by solid state polymerization is described. A mixture of a partially crystalline polycarbonate having activated terminal aryloxy groups, for example terminal methyl salicyl groups, when heated together with an oligomeric polyes... | 11/01/2005 |
| 6784228 | Epoxy resin composition, cured article thereof, novel epoxy resin, novel phenol compound, and process for preparing the same The present invention relates to an epoxy resin composition a cure article thereof, a novel epoxy resin used therein, a polyhydric phenol compound suited for used as an intermediate thereof, and a process for preparing the same. One of the objects to be achieved by ... | 08/31/2004 |
| 6620939 | 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 bisp... | 09/16/2003 |
| 6600004 | Method of preparing polyestercarbonates A method of preparing polyestercarbonates is presented in which a mixture of at least one activated diaryl carbonate is reacted under melt polymerization conditions with at least one aromatic dihydroxy compound together with at least one dicarboxylic acid... | 07/29/2003 |
| 6433236 | Acid catalyzed isomerization of substituted diaryls A substituted diaryl compound or a mixture of substituted diaryl compounds, such as dimethylbiaryl compounds are isomerized by treatment with a strong acid or mixtures of strong acids in the absence of any additional catalyst. The strong acid or mixture o... | 08/13/2002 |
| 6414106 | Process for the neutralization of residual acid species in crude dihydric phenols The present invention relates to a method of neutralizing residual acid species in crude dihydric phenol comprising the step of introducing a thermally stable organic base selected from the group consisting of tetraalkyl phosphonium hydroxides, tetraorgan... | 07/02/2002 |
| 6384288 | Method for the production of bis(4-hydroxyaryl)alkanes A process for producing bis(4-hydroxyaryl)alkane is disclosed. The process comprise in sequence the steps of (a) passing inert gas through a melt at 150 to 230° C. that contains bis(4-hydroxyaryl)alkane and other aromatic hydroxy compounds, under conditi... | 05/07/2002 |
| 6316677 | Production process of bisphenol compounds A process for the production of a bisphenol compound comprising: a step for reacting a phenolic compound (a) with at least one compound (b) selected from the group consisting of dialkenylbenzene compounds, bis(hydroxyalkyl)benzene compounds and (hydroxyalkyl)-... | 11/13/2001 |
| 6313355 | Process for the preparation of tetrabromobisphenol-A Tetrabromobisphenol-A is produced in a bromination process where no bromine or only a very small proportion of bromine is fed to the reactor. In the process aqueous hydrobromic acid, is the sole source or a major source of the bromine. In the process ther... | 11/06/2001 |
| 6300527 | Process for the preparation of tetrabromobisphenol-A This invention relates, inter alia, to a process for the production of tetrabromobisphenol-A by the bromination of bisphenol-A and/or underbrominated bisphenol-A, which process features: a water and water-miscible organic solvent reaction medium; a relati... | 10/09/2001 |
| 6162953 | Process for the preparation of tetrabromobisphenol-A This invention relates to a process for the production of tetrabromobisphenol-A by the bromination of bisphenol-A, which process features the addition of bisphenol-A to a reaction mass containing unreacted Br2 and 30 to 85 wt % water and an alc... | 12/19/2000 |
| 6147169 | Curable coating composition A curable coating composition comprising (A) a functional group-containing base resin and (B) a clathrate compound consisting of (i) at least one guest compound selected from the group consisting of a curing agent having a functional group crosslinkable w... | 11/14/2000 |
| 6118029 | Process for producing 3,3',5,5'-tetra-t butylbiphenol A batch or continuous process produces highly pure 3,3',5,5'-tetra-t-butylbiphenol suitable as a starting material for the synthesis of 4,4'-biphenol. The process for producing 3,3',5,5'-tetra-t-butylbiphenol comprises conducting an oxidation coupling ... | 09/12/2000 |
| 6084137 | Process for the preparation of tetrabromobisphenol-A This invention relates to a process for the production of tetrabromobisphenol-A by the bromination of bisphenol-A, which process features the addition of bisphenol-A to a reaction mass containing unreacted Br2 and 30 to 85 wt. % water and an al... | 07/04/2000 |
| 6084136 | Process for the preparation of tetrabromobisphenol-A This invention relates to a process for the production of tetrabromobisphenol-A by the bromination of bisphenol-A, which process features: (a) feeding to a reaction mass (i) bisphenol-A and (ii) a stream of gaseous bromine, the gaseous stream having a Rey... | 07/04/2000 |
| 6011184 | Descaling of bisphenol-A reactor using water An integrated process for the preparation and recovery of BPA in pure form utilizes a series of steps to crystallize the 1:1 adduct of phenol and bisphenol-A, with periodic descaling of the crystallizer surfaces with a modified reactor/crystallizer contai... | 01/04/2000 |
| 6002051 | Tertiary alkyl alkylphenols and organic compositions containing same Novel compounds of the general formula ##STR1## wherein each R1 is independently a tertiary alkyl group containing from 4 to about 8 carbon atoms and each of X, Y and Z is independently hydrogen or a hydrocarbon-based group, provided at le... | 12/14/1999 |
| 6002050 | Process for the preparation of tetrabromobisphenol-A This invention relates to a process for the production of tetrabromobisphenol-A, which process features: a water and water miscible solvent reaction medium; a relatively high reaction temperature; and the presence, in the reaction medium, of unreacted Br | 12/14/1999 |
| 5959158 | Method and system for bisphenol a production using water Methods/systems for making a relatively high-purity bisphenol A product from phenol and acetone. Controlled turbulence is used to form bisphenol A adduct solids having improved physical properties. Phenol is separated from the bisphenol A product while in... | 09/28/1999 |
| 5874644 | Method and system for bisphenol a production using controlled turbulence Methods/systems for making a relatively high-purity bisphenol A product from phenol and acetone. Controlled turbulence is used to form bisphenol A adduct solids having improved physical properties. Phenol is separated from the bisphenol A product while in... | 02/23/1999 |
| 5851837 | Method for determination of salt stoichiometry A method for making bisphenol salt as the result of the reaction between bisphenol and an alkali metal hydroxide. The method comprising steps to obtain the anhydrous alkali metal bisphenoxide salt within about a 0.2 mol % stoichiometry relationship betwee... | 12/22/1998 |
| 5777180 | Process for the production of bisphenols An improved process for the production of bisphenols is presented in which ketones and phenols are reacted in the presence of an acidic cationic exchange resin catalyst and a mercaptan cocatalyst. Prior to the reaction, alkyl alcohol is removed from the k... | 07/07/1998 |
| 5756860 | Crystalline adduct of bisphenol A and bisphenol TMC The invention relates to the preparation of a transparent crystalline adduct consisting of bisphenol A (75 parts) and bisphenol TMC (25 parts), which has a melting point of 144° C. which is below the melting points of the pure starting compounds bispheno... | 05/26/1998 |
| 5723689 | Process for recovering bisphenols A method for recovering substantially pure p,p-bisarylols from a mixture comprising the same by subjecting the mixture to vacuum distillation and melt crystallization in the absence of an adduct crystallization and the generation of a reaction recycle str... | 03/03/1998 |
| 5710346 | 2,2-bis(3,5-disubstituted-4-hydroxyphenyl) propane derivative, process for production thereof, and process for producing pyrogallol using said derivative The present invention provides a 2,2-bis(3,5-disubstituted-4-hydroxyphenyl) propane derivative represented by general formula (1) ##STR1## wherein each R1 represents a hydrogen atom or a lower alkyl group; a process for producing such prop... | 01/20/1998 |
| 5698600 | Process for the production of bisphenols with the use of new cocatalysts The invention relates to the synthesis of bisphenols from monophenols and carbonyl compounds such as aldehydes and ketones with concentrated mineral acids such as hydrochloric acid and/or hydrogen chloride gas as acid catalysts and a mercaptan as cocataly... | 12/16/1997 |
| 5696295 | Method for the preparation of ultra-pure bisphenol A and the use thereof The invention relates to a method for the purification by distillation of p,p-bisphenol A from the melt. The p,p-bisphenol A melt thus obtained is highly heat-stable, stable in storage and colour-stable, is free from high-boiling components and no longer ... | 12/09/1997 |
| 5675044 | Process for recovery of bisphenol-A from thermoplastic polymer containing dihydric phenol units A method of recovering dihydric phenol, particularly bisphenol-A, from compositions containing the reaction residue of bisphenol-A units which method comprises: a. granulating a bisphenol-A containing polymer; b. treating the particles with an alcohol, or any ... | 10/07/1997 |
| 5585404 | 3,5,3'-triiodothyronine receptor ligands Use of a compound selected from the group consisting of 3,5-diiodo-4-(2-N,N-diethylaminoethoxy)phenyl-(2-butylbenzofur-3-yl)methan ol hydrochloride (001), 2-methyl-3-(3,5-diiodo-4-(2-N,N-diethylaminoethoxy)-benzoyl)benzofuran hydrochloride (003), ... | 12/17/1996 |
| 5541282 | Aromatic polyhydroxy compounds and process for the preparation thereof The invention involves aromatic polyhydroxy compounds, including triaromatic bisphenols and tris-[1,1,1-(4-hydroxyphenyl)] toluenes, and a process for the preparation thereof by reacting a phenolic compound, e.g. phenol, with a suitable halo-compound, for... | 07/30/1996 |
| 5527971 | Process for the preparation of tetrabromobisphenol-A This invention relates to a process for the production of tetrabromobisphenol-A by the bromination of bisphenol-A, which process features: a water and water miscible solvent reaction medium; a relatively high reaction temperature; the presence, in the rea... | 06/18/1996 |
| 5512700 | Process for purifying a bisphenol A process for the purification of a crude bisphenol comprises the following steps: (1) preparing a mixture comprising from about 35 to about 70% of a crude bisphenol and from about 65 to about 30% of water, by the total weight of bisphenol and water, with... | 04/30/1996 |
| 5475152 | Process and composition A method comprising purifying impure bisphenol-A by fractional melt crystallization in a falling film dynamic crystallizer.... | 12/12/1995 |
