Matches 51 - 100 out of 126 < 1 2 3 >


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5304684 Process for producing phenol and methyl ethyl ketone  
sec-Butylbenzene hydroperoxide obtained by oxidizing sec-butylbenzene is decomposed into phenol and methyl ethyl ketone, a resulting liquid comprising a methyl ethyl ketone as the main component...
5283376 Method of phenol extraction from phenol tar  
The invention is related to petrochemistry and is useful in the process of combined production of phenol and acetone by the cumene method. The method is a two stage process which minimizes waste...
5276216 Process for oxidizing aromatic and aliphatic compounds  
Process for oxidizing aromatic and aliphatic compounds, by using, in aqueous solution, an enzymatic system constituted by hydrogen, peroxide as the oxidizer compound, peroxidase and activated...
5264636 Process for producing highly pure phenol  
A process for producing a highly pure phenol, in which a crude phenol obtained from an acid-decomposition product of cumene hydroperoxide and having an α-methylstyrene content of 15% by weight or...
5240568 Removal of acetophenone from phenol purification residues  
A process for separating phenol obtained by the decomposition of cumene hydroperoxide from high boiling impurities, includes the following steps:a) feeding phenol rectification bottoms comprising...
5171868 Epoxidate treatment  
Caustic requirements are substantially reduced in the treatment of epoxidate from olefin/ethylbenzene hydroperoxide epoxidation by treating the epoxidate products with an aqueous stream comprised...
5160497 Phenol production process  
Phenol production process wherein: 1) benzene is reacted with propene and isopropylic alcohol by contacting a catalyst based on a dealuminized Y zeolite with a SiO2 /Al2 O3 molar ratio ranging...
5131984 High quality phenol rectification with energy recovery  
The process for rectification of phenol prepared from crude phenol being the product of decomposition of cumene hydroperoxide and having previously been distilled to remove large portions of...
5122234 Preparation of phenol having improved clarity when dispersed in water  
This invention is a continuous process for preparing phenol having improved clarity when dispersed in water. The phenol is prepared from crude phenol being the product of decomposition of cumene...
5064507 Distillation process for recovery of high purity phenol  
High purity phenol is obtained from cleavage of cumene hydroperoxide by treating the crude phenol product stream in a first treatment zone with an amine, a coarse distillation to obtain an...
5055623 Preparation of phenols by direct N2 O hydroxylation of aromatic substrates  
Phenol/substituted phenols are prepared by directly hydroxylating an aromatic substrate with nitrous oxide, in vapor phase, in the presence of a modified (acidified) ZSM-5 or ZSM-11 zeolite,...
5015786 Preparation of cumene through alkylation of an aromatic compound and preparation of phenol through cumene  
In a first form, a process is provided for preparing phenol by converting acetone by-produced by the cumene process into isopropanol, and alkylating benzene with the isopropanol and optional...
4973766 Process for recovering phenol from a rectification purge  
A process for recovering phenol from a rectification purge containing various organic foreign matters, which includes the steps of subjecting the purge to an extraction operation, using, as an...
4960958 Catalysts for catalytic pyrolysis of phenol distillation residue and process for recovering useful substances by pyrolysis the same  
The catalysts for use in pyrolytic decomposition of the phenol distillation residue in accordance with the present invention are used in pyrolytically decomposing a distillation residue resulting...
4857151 Phenol purification  
Crude phenol containing methyl benzofuran and other impurities is distilled in the presence of water to recover a phenol bottoms having a reduced quantity of impurities. The water-phenol overhead...
4851086 Production of high purity phenol by steam distillation  
Crude phenol, containing AMS by-product, and MBF impurity, is distilled in the presence of water to separate MBF impurity.
4832796 Process for purifying phenol  
A process for improving the quality of phenol which comprises (a) introducing a liquid phenol composition comprising above about 95 weight percent phenol on a dry basis, organic acid contaminants,...
4634796 Production of high purity phenol  
Phenol feed to a steam distilling column, containing alpha-methylstyrene and mesityl oxide, is treated with a base, without acidification, and the heavy phenol product is acidified and distilled...
4532012 Production of high purity phenol by distillation with steam and a solvent  
Phenol containing MBF impurity is distilled in the presence of water and an extraction solvent for MBF (preferably AMS and/or cumene) to recover a phenol bottoms having reduced impurities. The use...
4504364 Phenol purification  
In the production of high purity phenol, a water-phenol mixture recovered from the top of a distillation column is contacted with a water immiscible solvent to extract methyl benzofuran and other...
4490566 Production of phenol  
Phenol and acetone are produced by the cleavage of cumene hydroperoxide in the presence of a solid heterogeneous catalyst with acidic activity comprising an intermediate pore size zeolite such as...
4463199 Method for producing phloroglucin  
In a method for producing phloroglucin by a decomposition of 1,3,5-triisopropylbenzene trihydroperoxide (hereinafter referred to as THPO), a method for producing phloroglucin wherein an acid...
4463197 Method for purifying phloroglucin  
A method for purifying phloroglucin wherein crude phloroglucin obtained by an acid-decomposition of 1,3,5-triisopropylbenzene trihydroperoxide in the presence of a solvent and removal of the...
4370205 Recovery of cumene from a mixture thereof with phenol and water  
A process is disclosed for the recovery of a phenol-free cumene fraction from a mixture thereof with phenol and water. Said mixture is introduced into a first fractionation column at conditions to...
4355190 Process for recovery of resorcinol from aqueous resorcinol solution containing hydroquinone  
A process for recovery of resorcinol from an aqueous resorcinol solution containing hydroquinone which comprises oxidizing an aqueous resorcinol solution containing about 10 to about 60% by weight...
4351967 Process for producing phenolic compounds  
In an improved process for recovering a phenolic compound, the improvement comprising, subjecting a phenolic containing fraction recovered overhead in an extractive distillation, to a subsequent...
4339605 Process for the thermal decomposition of phenol pitch  
Phenol pitch obtained as a bottoms fraction in the distillation of phenol deriving from the acid hydrolysis of cumene hydroperoxide is treated to recover therefrom desired products consisting of...
4328377 Process for producing phenolic compounds  
In a process for producing a phenolic compound which comprises treating an aralkyl hydroperoxide with a mineral acid to cleave it to phenolic compound and a ketone, neutralizing or removing the...
4328372 Recovery of cyclohexanone from cyclohexylbenzene hydroperoxide acid cleavage product  
Ketal and hemiketal found in the reaction mass resulting from the acid catalyzed cleavage of cyclohexylbenzene hydroperoxide in the presence of alcohol are removed from the reaction mass resulting...
4283568 Process for the recovery of phenol from a reaction mixture resulting from the acid cleavage of cumene hydroperoxide  
A process for the recovery of phenol from a reaction mixture resulting from the acid cleavage of cumene hydroperoxide is disclosed. Neutralization of the acidic reaction mixture is effected with...
4283567 Method for recovering resorcinol  
In a method for recovering resorcinol by thermally cracking high-boiling by-products formed by the acid-cleavage of m-diisopropylbenzene dihydroperoxide in the presence of at least one ammonium...
4271322 Process for preparation of phenols  
Disclosed is a process for the preparation of phenols which comprises the steps of (I) decomposing a hydroperoxide of an isopropyl aromatic compound with an acid catalyst, (II) separating the...
4251325 Process for the removal of hydroxyacetone from phenol  
Phenol containing less than 30 ppm hydroxyacetone is produced by feeding hydroxyacetone-contaminated phenol obtained by the decomposition of cumene hydroperoxide, which phenol is substantially...
4167456 Extractive distillation to separate cyclohexylbenzene from phenol-cyclohexanone mixture containing the same  
Diaryl ether is used as an extractive distillation solvent to separate mixtures containing cyclohexylbenzene, phenol and cyclohexanone. A mixture of cyclohexylbenzene, cyclohexanone and phenol...
4166772 Extractive distillation separation of cumene and phenol  
A trisubstituted phosphate is employed as extractive distillation solvent in the separation of cumene and phenol.
4158611 Process for recovering crude phenol from catalyst-free cumene hydroperoxide cleavage reaction products  
Crude phenol is recovered from CHP reaction products by continuously feeding to a main column separating in its uppermost section phenol from crude acetone, this fraction being removed overhead,...
4120902 Oxidation product recovery  
A process for the separation and purification of reaction product from the oxidation of hydrocarbyl aromatic compounds to hydrocarbyl aromatic hydroperoxides is provided comprising (1) extracting...
4071569 Process for producing phenols  
Phenols can be produced in a high yield together with useful aldehydes by cleaving a secondary alkylbenzene hydroperoxide in the presence of sulfur, a sulfur oxide or a phosphorus sulfide and then...
4026791 Treatment of aqueous waste  
In the process of producing phenol from cumene, aqueous waste streams result which are contaminated with organic materials, particularly phenol, which are made innocuous to the environment only...
4021490 Process for production of phenol and cyclohexanone  
Benzene is converted by reductive alkylation to cyclohexylbenzene; cyclohexylbenzene by oxidation and cleavage is converted into a mixture of cyclohexylbenzene, phenol and cyclohexanone; after...
4019965 Separation of phenol, cyclohexanone, and cyclohexylbenzene containing mixtures employing dialkyl and dicycloalkyl phthalates  
Phenol, cyclohexanone, and cyclohexylbenzene containing mixtures are extractively distilled to provide overhead of cyclohexylbenzene and cyclohexanone and a kettle product substantially free of...
4016213 Recovery of phenol, acetone and dimethyl phenyl carbinol from cumene oxidation product  
In the process for obtaining phenol and acetone from cumene hydroperoxide which has been obtained by liquid-phase oxidation of cumene with molecular oxygen, dehydration of by-product dimethyl...
3996111 Recovering ethylphenol from decomposition products of diethylbenzene monohydroperoxide  
A process for recovering and separating substantially pure ethylphenol and substantially pure diethylbenzene from a mixture resulting from the decomposition of diethylbenzene monohydroperoxide and...
3965187 Hydrogenation of phenol  
The catalytic hydrogenation of phenol obtained by the cumene hydroperoxide process is improved by hydrogenating high purity phenol containing not more than 75 ppm of acetol, an impurity found in...
3931339 Removal and neutralisation of acid catalyst from products of cumene hydroperoxide cleavage  
The mineral acid catalyst is removed from the products of cumene hydroperoxide cleavage by contact with an aqueous solution of an inorganic salt and an excess of an alkali metal hydroxide or...
3931001 Pentachlorophenol recovery with methylene chloride  
A method for removing antimicrobials such as pentachlorophenol from waste water by liquid-liquid extraction with a water immiscible organic liquid in a packed column; recovering the antimicrobial...
3927124 Process for the neutralization of alkyl aromatic hydroperoxide rearrangement reaction products  
The rearrangement product mixture resulting from an acid catalyzed rearrangement of an alkyl aromatic hydroperoxide is neutralized by additions of a basic material to the mixture in a two step...
3896006 Mesityl oxide removal from high-purity phenol  
A process for the purification of phenol obtained from the acid cleavage of cumene hydroperoxide and consisting essentially of phenol and less than 1,000 parts per million of water-soluble colour...
3862244 PROCESS FOR THE PURIFICATION OF PHENOL  
Phenol produced by splitting isopropylbenzene hydroperoxide is purified, especially from chromogenic impurities, by heating with oxygen at a pH at least 7, and distilling the product.
3850996 TREATMENT OF THE HEAVY ENDS FRACTION OF CUMENE HYDROPEROXIDE CLEAVAGE REACTION MIXTURE  

Matches 51 - 100 out of 126 < 1 2 3 >