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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...
8298378 Method for treating waste water containing oxygen-containing compound having phenolic hydroxyl group of carbonyl group  
A method for treating a wastewater containing oxygen-containing compound having a phenolic hydroxyl group or a carbonyl group, including a step of adding an alkali agent to the wastewater...
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...
7759524 Process for producing phenol and methyl ethyl ketone  
In a process for producing phenol and methyl ethyl ketone, benzene and a C4 olefin are contacted under alkylation conditions and in the presence of an alkylation catalyst to produce...
7488853 Process for producing phenols  
A process for producing a phenol, which comprises the following steps of: (1) oxidizing an alkylbenzene with an oxygen-containing gas to obtain an oxidation reaction mixture containing a...
7446232 Process for oxidizing alkylaromatic compounds  
In a process for oxidizing alkylaromatic compounds to the corresponding hydroperoxide, an alkylaromatic compound of general formula (I): in which R1 and R2 each independently represents an alkyl...
7282613 Process for producing phenol and methyl ethyl ketone  
A process for producing phenol and methyl ethyl ketone (MEK).
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....
7067680 Process for preparing organic hydroperoxide having a reduced amount of contaminants  
A process for preparing organic hydroperoxide having a reduced content of contaminants, which process involves: (a) oxidation of an organic compound to obtain reaction product containing an...
7019180 Method of purifying phenol  
A method of purifying a phenol stream that contains a concentration of a contaminating compound is provided. The phenol stream is treated or purified by contacting the stream, under suitable...
7002048 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...
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...
6965056 Removal of salts in the manufacture of phenolic compound  
There is provided a process for the manufacture of phenolic compounds by separating a neutralized aralkyl hydroperoxide cleavage mass stream containing salts of neutralization into a crude ketone...
6825387 Low sodium cleavage product  
Washed cleavage product (WCP) in a phenol manufacturing process is treated to remove sodium ions. The WCP is contacted with a cation exchange resin in hydrogen form, and then with anion exchange...
6824687 Extraction of phenol from wastewater  
A method is provided herein for the extraction of phenol from a waste water stream. The method is used in conjunction with a process for producing acetone and phenol from cumene. The method for...
6657087 Process and apparatus for the work-up by distillation of cleavage product mixtures produced in the cleavage of alkylaryl hydroperoxides  
The present invention claims a process and an apparatus for the work-up by distillation of cleavage product mixtures produced in the cleavage of alkylaryl hydroperoxides. Usually, in the work-up...
6635789 Production and purification of phenol  
A process for separating sulfonic acid compounds from a phenolic solvent is provided by contacting the phenolic solvent with a hydrotalcite-type material (HTM). The process can be applied in the...
6630608 Process for preparing phenols  
The present invention relates to a process for preparing phenols, in which the pH of the reaction product from the acid-catalyzed cleavage of alkylaryl hydroperoxides is set to a value of at least...
6620980 Method for recovery of phenol from aqueous streams  
An improved method for the recovery of phenol from aqueous streams comprises adding a relatively non-polar solvent to a phenol containing aqueous stream to improve the separation of the phenol...
6583326 Process for separating phenol from a mixture comprising at least hydroxyacetone, cumene, water and phenol  
Phenol is separated from a mixture containing hydroxyacetone, cumene, water and phenol, by fractionating the mixture in a process with a fractional distillation step and a phase separation step to...
6576798 Method and system for purifying cumene hydroperoxide cleavage products  
A system for purifying a cumene hydroperoxide cleavage product mixture comprises a cumene hydroperoxide cleavage product mixture feed containing impurities in fluid communication with an aqueous...
6573408 System and method for purifying cumene hydroperoxide cleavage products  
A system for purifying a cumene hydroperoxide cleavage product mixture comprises a cumene hydroperoxide cleavage product mixture feed containing impurities in fluid communication with an aqueous...
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...
6441251 Production of phenol  
A process for producing phenol and acetone from cumene hydroperoxide is described in which the cumene hydroperoxide is contacted with a solid-acid catalyst comprising an inorganic, porous,...
6441252 Apparatus for producing phenol using reactive distillation  
An apparatus for producing phenol and acetone from cumene hydroperoxide comprises a reactive distillation column comprising at its upper portion a distillation column and at its lower portion a...
6433232 Process for producing hydroxyaromatic compound  
A process for producing a hydroxyaromatic compound by oxidizing an alkyl group-substituted aromatic hydrocarbon to a hydroperoxyaromatic compound and decomposing the hydroperoxyaromatic compound...
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...
6201157 Method for production of phenol and acetone by decomposition of cumene hydroperoxide  
An improved method for production of phenol and acetone by decomposition of cumene hydroperoxide in the presence of an acidic catalyst to phenol and acetone, wherein the improvement comprises...
6180834 Process for the extraction of the salts contained in the neutralized separated product obtained in the preparation of phenol by the oxidation of cumene  
Process for the extraction of the salts contained in the neutralized separated product obtained in the preparation of phenol by the oxidation of cumene, wherein the flow-rate of the aqueous stream...
6066767 Method of purifying cumene hydroperoxide decomposition products from hydroxyacetone and from other carbonyls  
Purification of cumene hydroperoxide cleavage products from hydroxyacetone and carbonyl compounds is accomplished via extraction of hydroxyacetone and carbonyl compounds from cleavage products...
6057483 High selective method of phenol and acetone production  
Disclosed is a process for the cleavage of technical cumene hydroperoxide (CHP) into phenol, acetone and α-methylstyrene. In a first stage, the CHP cleavage process is conducted in such a way to...
6034282 Method of phenol tar desalting  
A method for reduction of salt content in phenol tars with no additional solvent which washes the tars with water alone in a countercurrent flow extractor and substantially reduces the level of...
6025530 Phenol tar cracking process  
The present invention relates generally to a method for treating phenol tar, and, more particularly to a method for separating valuable products from phenol tar by treating the tar with steam.
5811598 Process for the recovery of phenol from an aqueous stream containing NA SO4  
Phenol dissolved in an aqueous sulphatic stream discharged from a reactor in which cumene hydroperoxide is oxidized to phenol and acetone is recovered by extracting phenol present in said aqueous...
5672775 Method of separating phenol from highly concentrated phenol solution  
The present invention relates to a method of separating and purifying phenol in a simple and economical manner, by employing a step of adding high pressure carbon dioxide to the aqueous phenol...
5600026 Process for production of cresols  
There is disclosed a process for the production of cresols, including the steps of: (a) conducting oxygenation of cymene with oxygen gas or an oxygen-containing gas, thereby obtaining a solution...
5538599 Phenol separation  
A process is provided whereby phenol is separated from 1-phenyl ethanol, acetophenone or mixtures by extractive distillation with sulfolane as extractive distillation agent which decreases phenol...
5512175 Assembly for removing hydrophilic contaminants, method of the same, and apparatus for producing phenol  
An assembly for removing hydrophilic contaminants and a method of removing hydrophilic contaminants such as sodium included in an oil-state liquid using the removing assembly, which is able to...
5510543 Removal and neutralization of acid catalyst from products of cumene hydroperoxide cleavage  
The present invention is an improved method for the recovery of phenol from a cleavage mass resulting from the sulfuric acid cleavage of cumene hydroperoxide comprising neutralizing the cleavage...
5504251 Co-cracking of BPA and phenol process tars  
This invention relates to processing of a mixture of tars produced in phenol manufacture and in bisphenol manufacture. The heating of a bottom liquid from a bisphenol-A process together with...
5502259 Method for purification of phenol  
The invention relates to a method for purification of phenol and specifically to a method for purification of phenol produced within the process of joint phenol and acetone production by cumene...
5491268 Process for removal of acidic compounds from phenol process streams  
A process for purifying phenol, phenol-type compounds, and substituted phenol and phenol-type compounds of contamination by components more acidic than the phenol component comprising treating a...
5487816 Process for the reduction of phenol content in a crude organic stream recovered from a phenol stripper  
A process to separate in a fractionation zone an admixture comprising phenol, alpha-methylstyrene and water to produce an alpha-methylstyrene stream containing a minimum of phenol. The pH of the...
5457244 Phenol tar waste reduction process  
An improved phenol tar cracking process using a rectification column as a hydrocracker obtains an increased yield of valuable products, phenol, cumene and alpha-methylstyrene, by taking from 50 to...
5456806 Procedure for the recovery of phenol from its mixtures containing cumene and alpha-methylstyrene  
A procedure for the recovery of phenol from its mixtures containing cumene and alpha-methylstyrene, is based on the extractive distillation of the mixtures with acetophenone.
5430200 Process for producing phenol from cumene  
The present invention provides in a particular embodiment an improvement in the process for producing phenol by the acid-catalyzed cleavage of cumene hydroperoxide (CHP). The reactant stream fed...
5414154 Phenol with low levels of methylbenzofuran  
A process for the reduction of methylbenzofuran (MBF) impurities in phenol obtained from the decomposition product of cumene hydroperoxide requires treating the phenol to reduce the level of...
5334774 Process for purifying phenol  
A process for purifying and recovering phenol present in a mixed solution containing phenol and one or more compounds capable of forming azeotropic mixtures with phenol wherein an additive which...

Matches 1 - 50 out of 126 1 2 3 >