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9029609 Phenol purification process  
The present invention provides an easy process for purifying phenol by separating carbonyl compounds through selective hydrogenation of the compounds to the corresponding alcohols then...
8758573 Removal of hydrocarbons from an aqueous stream  
The present application concerns a process for the removal of hydrocarbons from an aqueous stream, which process may include conducting a phenol-containing water stream into a separation column,...
8709166 Economical, food-safe extraction of bisphenols  
Methods for extracting bisphenols from polymer substrates are described. The methods include contacting the polymer substrate with an aqueous composition which includes a phase transfer agent, a...
8628849 Method for preparing purified pyrocatechol  
The subject of the present invention is a method for preparing pyrocatechol from which the impurities resulting from the method for the preparation thereof have been removed. The method for...
8558031 Method for high efficiency salt removal from phenol process byproducts  
A desalting method for extracting salt from phenol production waste of a phenol process, comprising the steps of: (a) receiving said phenol production waste from the phenol process;(b) providing a...
8507732 Purification of tris-hydroxyaryl compounds  
The present invention is directed to a composition comprising a tris-hydroxyaryl compound having a metal ion impurity content of less than 10 ppm and to a process for the purification of...
8389776 Treatment of phenol  
A process for the removal of by-products from a phenolic mixture, which process may include the following steps: subjecting a phenolic mixture to extractive distillation to produce an initial...
8283501 Optically active 2,2′-biphenol derivative and production method of same  
Disclosed herein are optically active biphenol derivatives represented by the following formulas (1) and (2), a method for optically resolving a biphenol derivative represented by formula (2′), a...
8257557 Dehydration method  
A dehydration method for removing water from a hydrolysis reaction mixture containing unreacted water generated when monochlorobenzene is hydrolyzed to produce phenol, the method for dehydrating...
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...
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...
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,...
7977516 Process of obtainment of trans-resveratrol and/or emodin and nutraceutical compositions containing them  
Processes for the separation and purification of polyphenol trans-resveratrol and/or anthraquinone emodin from Polygonum cuspidatum and/or Rumex acetosa, by means of solvent selective extraction....
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...
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...
7851514 Process for producing regenerated resin, regenerated resin, processing recovered matter from resin composition, regenerated resin composition and method of regenerating resin composition  
The invention provides a process for producing a recycled resin, which includes: a first step of decomposing a resin composition containing a thermosetting resin in a supercritical or subcritical...
7795459 Paricalcitol purification  
Paricalcitol, a synthetic vitamin D analog, is purified to a purity greater than 99.7% by crystallization from solution in isopropyl acetate solvent, followed by filtration and vacuum drying....
7759527 Microwave induced one pot process for the preparation of arylethenes  
The invention entitled “A Microwave Induced One Pot Process for The Preparation of Arylethenes” provides a method for the preparation of commercially important 2- or 4-hydroxy substituted...
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...
7541417 Process for the purification of dihydric phenols  
A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A, contacting the solution A with an adsorbent material selected from the group consisting of metal...
7528210 Method of purification of dihydric phenols  
A process comprising the steps of dissolving a dihydric phenol in a solvent to form a solution A; contacting the solution A with a zeolite; filtering the zeolite to form a solution B; adding an...
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...
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...
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...
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...
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...
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...
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...
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....
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...
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...
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...
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...
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...
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...
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...
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...
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...
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.
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...
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,...
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...
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...
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...
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...
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...
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...
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...
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...
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H or glucose from the leaves of Taxus...
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