Did You Know...
...that the video game, Pong, was invented by a guy who graduated at the bottom of his engineering class? Nolan Bushnell spent more time running the games at a local amusement park than he did on his studies at the University of Utah. His dreams of working for Disney's amusement empire were dashed when the company wouldn't hire him. Taking a boring job, Nolan daydreamed about electronic versions of popular games. He invented Pong, the first video game, and went on to found Atari Co.
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| Number | Title | Issue Date |
| 8088956 | BPA process improvement The present disclosure enables phenol recovery, purification and recycle in a simple, economic manner from waste streams from, for example, a phenol/acetone production process, e.g., a phenol/acetone plant or an upstream cumene hydroperoxide cleavage process step, a... | 01/03/2012 |
| 7902408 | BPA process improvement The present disclosure enables phenol recovery, purification and recycle in a simple, economic manner from waste streams from, for example, a phenol/acetone production process, e.g., a phenol/acetone plant or an upstream cumene hydroperoxide cleavage process step, a... | 03/08/2011 |
| 7858830 | Process for recovering phenol from a BPA waste stream An improved process for recovering phenol from a bisphenol-A residue stream by reconfiguring the distillation column and the cracking reactor in a way that separates the reboil/distillation heat load and the cracking heat load, so that separate heat sources are used... | 12/28/2010 |
| 7586013 | Method for preparing hydroxystyrenes and acetylated derivatives thereof A method is provided for the thermal decarboxylation of a phenolic substrate in the presence of a non-amine basic catalyst to produce a vinyl monomer. The product of the decarboxylation reaction may additionally be acetylated in the presence of an acetylating agent ... | 09/08/2009 |
| 7435319 | Process for the mild distillative separation of mixtures The invention relates to a semibatchwise process for the mild distillative separation of mixtures, in a first stage a column being supplied continuously with a feed and the feed being separated at least into different fractions, one of the fractions being removed co... | 10/14/2008 |
| 7371324 | Chemical process A process for extracting from aqueous solution the alkali metal or ammonium salt of a phenol, naphthol, anthrol or phenanthrol or the corresponding thiol, which comprises contacting an aqueous alkaline or neutral solution of the alkali metal or ammonium salt, in whi... | 05/13/2008 |
| 7355082 | Method of purifying long-chain alkyl phenols and Mannich adducts thereof A process for purifying a phenol derivative selected from alkylphenols having a number average molecular weight of from 200 to 4 000 and Mannich adducts thereof is described, in which the phenol derivative is brought into intimate contact with an extracting agent ha... | 04/08/2008 |
| 7301056 | Process for the separation of phenol from phenol-containing streams from the preparation of Bisphenol A A continuous process for the separation of phenol is disclosed. The process includes (a) feeding a stream of material, produced while preparing bisphenol A by reacting phenol with acetone, into a distillation column containing at least 5 theoretical separation stage... | 11/27/2007 |
| 7244772 | Process for preparing polyurethane polyol and rigid foams therefrom We describe a process for the preparation of polyurethane polyol from CARDANOL 3-(8pentadecenyl)phenol, derived from cashew nut shell liquid (CNSL), a renewable resource material. The polyol is made by oxidation with peroxy acid generated in situ to give epoxidised ... | 07/17/2007 |
| 7205442 | Method of making high purity phenol A method of manufacturing a phenol product having a reduced concentration of a contaminating reaction by-product. The method includes contacting a phenol stream, having a concentration of the contaminating by-product, by contacting the phenol stream with an acidic c... | 04/17/2007 |
| 7109384 | Process to extract phenolic compounds from a residual plant material using a hydrothermal treatment The hydrothermal treatment is based on placing the crude residual plant material in contact with hot water in a closed reactor, comprising the following steps: a) placing the material to be treated in contact with water in a closed... | 09/19/2006 |
| 7102036 | Process and catalyst for purifying phenol The goal of this invention is to produce phenol of high purity by conversion of impurities that are present in the starting phenol, which is produced by the decomposition of cumyl hydroperoxide. The indicated goal is achieved by purifying the phenol containing admix... | 09/05/2006 |
| 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 |
| 7034192 | Method for removal of acetol from phenol A method is provided for the efficient, low cost removal of acetol from a phenol stream. The method results in removal of substantially all of the acetol from the phenol stream without the formation of substantial amounts of additional methylbenzofuran. The method a... | 04/25/2006 |
| 7015028 | Process for treatment of organic waste materials A multi-stage process and system for treating organic waste materials includes steps of hydrolyzing the materials in an anaerobic vessel, transferring the liquid product of hydrolysis to an anaerobic digester, and further decomposing the waste materials under aerobi... | 03/21/2006 |
| 7002047 | Biocatalytic synthesis of quinic acid and conversion to hydroquinone A bioengineered synthesis scheme for the production of quinic acid from a carbon source is provided. Methods of producing quinic acid from a carbon source based on the synthesis scheme as well as conversion of quinic acid to hydroquinone are also provided. ... | 02/21/2006 |
| 6984761 | Co-production of phenol, acetone, α-methylstyrene and propylene oxide, and catalyst therefor A process is disclosed for producing α-methylstyrene, acetone, and phenol wherein the amount of α-methylstyrene produced may be controlled by selectively converting a portion of the cumene hydroperoxide to dimethyl phenyl carbinol, the hydrated form of α-methylst... | 01/10/2006 |
| 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 |
| 6964728 | Separation process Bisphenol-A-bis(neopentylglycolphosphate) products of enhanced properties and processes for preparing them are described. One of the processes includes (a) mixing and reacting neopentyl glycol and bisphenol-A-bis(dichlorophosphate) in an inert polar organic solvent ... | 11/15/2005 |
| 6844472 | Method and installation for separating and purifying diphenols in the phenol and phenol derivatives industry A method and installation for separating and purifying a crude mixture containing hydroquinone, resorcinol and possibly tars and/or catechol, comprising the following steps: —a possible distillation stage (I) in order to obtain a catechol head, —the foot (I) or ... | 01/18/2005 |
| 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 |
| 6600077 | Biocatalytic synthesis of quinic acid and conversion to hydroquinone A bioengineered synthesis scheme for the production of quinic acid from a carbon source is provided. Methods of producing quinic acid from a carbon source based on the synthesis scheme as well as conversion of quinic acid to hydroquinone are also provided... | 07/29/2003 |
| 6596908 | Process for the recovery of low molecular weight phenols, furfural, furfuryl alcohol and/or cellulose or cellulose-rich residues A process for the recovery of furfural, furfuryl alcohol, low molecular weight phenols and/or cellulose or a cellulose-rich material from a lignocellulosic material comprising: feeding a carrier gas into a reaction chamber to facilitate a fluidised bed ef... | 07/22/2003 |
| 6586639 | Functional alcohol releasing substance This invention discloses a substance which is a betaine ester of a functional alcohol that has an amido bond in its molecule and releases the functional alcohol.... | 07/01/2003 |
| 6586638 | Process for removing and recovering of phenolic compounds from aqueous fluids There is provided a process for removing and recovering one or more unassociated phenolic compounds dissolved in aqueous fluid, the process comprising the steps of: (a) transferring the one or more unassociated phenolic compounds from the aqueous fluid to... | 07/01/2003 |
| 6576801 | 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... | 06/10/2003 |
| 6489519 | Process for removal of impurities from phenol by means of at least one acid catalyst Impurities are removed from phenol by a process, comprising: first treating phenols containing impurities with at least one acid catalyst which converts the impurities into compounds which can be separated from phenol; separating the acid treated phenol from t... | 12/03/2002 |
| 6489518 | Process for reducing the salt content of fractions comprising high boilers obtained in the preparation of phenol from cumene, by extraction A process for reducing the salt content of fractions comprising high boilers obtained in the preparation of phenol from cumene, by extraction, is claimed. In the preparation of phenol from cumene, not only phenol and acetone but also by-products such as d... | 12/03/2002 |
| 6486365 | Production and purification of phenol: hydroxyacetone removal by hydrotalcite A process for converting carbonyl-type impurities contained in a phenolic solvent to high-boiling derivatives is provided by contacting the phenolic solvent with a hydrotalcite-type material (HTM). The phenol can be separated from the high-boiling derivat... | 11/26/2002 |
| 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 |
| 6388144 | Method for reducing methylbenzofuran levels in high purity phenol A process for treating phenol with a strong acid ion exchange resin to reduce the level of methylbenzofuran is provided. The process is capable of being carried out at elevated temperatures for extended periods, such that cooling of the phenol from distil... | 05/14/2002 |
| 6372021 | Extractive removal of methanol from cumene-to-phenol process vent gas Injection of even very small amounts of supplemental water to the spent-air stream at points upstream from the heat exchanger cooler(s) used in processing spent-air streams from a cumene-to-phenol process allows these heat exchanger coolers to act as both... | 04/16/2002 |
| 6307111 | Method for continuous production of dihydroxydiarylalkanes The present invention relates to a process for the continuous production of dihydroxydiarylalkanes (bisphenols) by the reaction of fresh phenol, phenol and isoalkenylphenol from the decomposition of by-products, and ketone. In this process the bulk of the... | 10/23/2001 |
| 6294702 | Method for continuous production of dihydroxydiphenylalkanes The present invention relates to a process for the continuous production of dihydroxydiphenylalkanes (bisphenols) by the reaction of fresh phenol, and of phenol obtained from the cracking of by-products, with isoalkenylphenol and ketone. In the course of ... | 09/25/2001 |
| 6258985 | Method for removing metal ions from cresol mixtures A method for removing of metal ions from cresol or from mixtures of aromatic compounds containing cresol is disclosed, wherein the water content in the cresol mixture is adjusted to at least about 0.5 per cent by weight by the addition of water and the wa... | 07/10/2001 |
| 6258901 | Process for producing lightly colored p-vinylphenol polymer There is provided a process for efficiently and economically producing a polymer which is superior in transmittances of visible light and far-ultraviolet light, has a high molecular weight and is light-colored. A process for producing a light-colored viny... | 07/10/2001 |
| 6184367 | Process for the production of 4-aryl-2 butanols from Taxus wallichiana The present invention provides a process for the production of two molecules of 4-aryl-2 butanols having the general formula 1 given below: ##STR1## Wherein R.dbd.H or glucose from the leaves of Taxus wallichiana, which comprises: (a) defatting air dried,... | 02/06/2001 |
| 6143937 | Recovery of hydroxyaromatic compound from aqueous extract solutions A method for efficiently recovering a hydroxyaromatic compound from aqueous extract streams of diaryl carbonate reaction mixtures, comprises contacting the aqueous extracts with a suitable solvent, preferably diphenyl carbonate or anisole. The aqueous str... | 11/07/2000 |
| 6133486 | Phenol recovery from BPA process waste streams The disclosure is of a process for recovering valuable phenol and acetone from by-products of the condensation of phenol and a ketone from a mother liquor obtained for example upon crystallization of a 1:1 adduct of phenol and bisphenol, the mother liquor... | 10/17/2000 |
| 6120653 | Separation and purification method of t-butyl-methylphenol isomer A method is provided for industrially advantageously and effectively separating 4M2B and 3M6B from a t-butylcresol mixture containing 2-t-butyl-4-methylphenol (4M2B), 2-tbutyl-5-methylphenol (3M6B), compounds having a lower boiling point than that of 4M2B... | 09/19/2000 |
