Class 568/576 - Purification or recovery

Subclass of Class 568 - Organic compounds -- part of the class 532-570 series
Definition: Processes which include separating the compound from impurities
No. of patents: 40
Last issue date: 07/27/2010

Number	Title	Issue Date
7763756	Method for collecting object material from solution A method for collecting an object material from a solution, which comprises the following steps: a step of adding a second solvent to a solution composed of an object material to be collected and a first solvent, then mixing therew...	07/27/2010
7678943	Process for producing hydroperoxides A process for the autocatalytic production of organic hydroperoxides and ultra low sulfur diesel boiling range hydrocarbons is disclosed. The organic hydroperoxides react with sulfur compounds to produce sulfones, and the sulfones can be removed from the diesel boil...	03/16/2010
7312365	Process for low temperature cleavage of an oxidation mixture comprising hydroperoxides A process for cleaving an oxidation product comprising s-butyl benzene hydroperoxide and/or cumene hydroperoxide which reduces the production of non-recoverable by-products from dimethylbenzyl alcohol (DMBA) and ethyl methyl benzyl carbinol (EMBA). ...	12/25/2007
7282613	Process for producing phenol and methyl ethyl ketone A process for producing phenol and methyl ethyl ketone (MEK). ...	10/16/2007
7141703	Process for producing phenol and ketone using neutralizing base Improved processes for oxidizing alkylbenzene(s) to produce phenol and ketone product(s) using neutralizing base. ...	11/28/2006
7102035	Removal of dialkyl ethers from dialkyl peroxides A process is disclosed for reducing the concentration of a dialkyl ether in a mixture comprising the dialkyl ether and a dialkyl peroxide wherein the process comprises treating said mixture with a strong acid. ...	09/05/2006
7049474	Water diluted cumene hydroperoxide solutions The present invention provides for the use of water, rather than cumene, as a more environmentally acceptable diluent for purified cumene hydroperoxide (CHP) solutions. From 1 to about 6 weight percent water can be used to dilute purified CHP solutions, thus reducin...	05/23/2006
6943270	High selective method of producing cumene hydroperoxide, phenol and acetone in an oxidation by-product conversion process A cumene process of producing phenol and acetone comprises the joint oxidation of aldehydes and dimethylbenzene alcohol by aqueous hydrogen peroxide solutions in presence of 16 wt % to 94 wt % of cumene hydroperoxide by contacting of mutually insoluble phases of the...	09/13/2005
6369278	Process for preparing extract containing at least one hydroperoxide There are provided: (I) a process for preparing an extract containing at least one hydroperoxide, which comprises the steps of: (1) oxidizing an aromatic hydrocarbon substituted with an alkyl group to obtain a liquid reaction mixture, and (2) extracting at lea...	04/09/2002
5959155	Process for the extraction of hydroperoxides A process for extraction of hydroperoxides wherein 1,3-di-(2-hydroperoxy-2-propyl)benzene and 3-(2-hydroxy-2-propyl)-1-(2-hydroperoxy-2-propyl)benzene are extracted from a raw solution comprising 1,3-di-(2-hydroperoxy-2-propyl)benzene, 3-(2-hydroxy-2...	09/28/1999
5658437	Reduction of the COD of an aqueous stream containing hydroperoxides and other organic impurities A process for reducing the COD of an aqueous stream containing methylhydroperoxide, cumylhydroperoxide and other organic impurities characterized in that the reduction of COD is obtained by eliminating the peroxides from the aqueous stream by column disti...	08/19/1997
5554796	Removal of primary and secondary hydroperoxide impurities from tertiary hydroperoxides A process for the purification of tertiary alkyl hydroperoxide containing contaminating quantities of primary and secondary alkyl hydroperoxides by contacting the impure hydroperoxide mixture with anhydrous carboxylic acid derivative such as maleic anhydr...	09/10/1996
5539131	Olefin epoxidation process In the Oxirane process for epoxide production, at least part of the alcohol formed during isobutane or isopentane peroxidation is replaced by an inert solvent such as decane....	07/23/1996
5488177	Method for the preparation of alkyl hydroperoxide solutions containing little or no water A method is described for the preparation of solutions containing little or no water of tertiary alkyl hydroperoxides in inert solvents by dewatering with sulfuric acid, according to which one or more inert organic solvents are added to an aqueous solutio...	01/30/1996
5453548	Purification of ditertiary butyl peroxide A process for the separation of ditertiary butyl peroxide form tertiary butanol is provided which includes the step of dehydrating the tertiary butanol to isobutylene and water....	09/26/1995
5334771	Peroxidation of secondary carbon in alkanes and cycloalkanes A secondary carbon atom in an alkane, including alkyl groups attached to aromatic rings, or cycloalkane is peroxidized by molecular oxygen to the corresponding hydroperoxide in the absence of a catalyst. The peroxidation is carried out in the presence of ...	08/02/1994
5283370	Process for the partial dehydration of a crude water-wet organic stream of the monohydroperoxide of p-diisopropylbenzene A process for the partial dehydration and partial purification of a crude water-wet organic stream of the monohydroperoxide of p-diisopropylbenzene is disclosed. This crude stream of monohydroperoxide contains at least 2 wt % water and is partially dehydr...	02/01/1994
5202498	Inhibiting color change in cumene hydroperoxide Undesirable color change in freshly manufactured cumene hydroperoxide is inhibited by treatment comprising adding sodium hydroxide in an effective amount up to about 120 ppm and holding the treated cumene hydroperoxide at a temperature of about 50° C. to...	04/13/1993
5166451	Treatment of hydroperoxide mixture Method of treating a hydroperoxide mixture containing both a primary and tertiary aromatic hydroperoxide, by treating the mixture with an alkali and an organic quaternary ammonium salt. This treatment selectively reduces the content of the primary hydrope...	11/24/1992
5104493	Tertiary butyl hydroperoxide concentration The invention relates to a process for concentrating TBHP while avoiding flammability and explosion hazards by distilling a mixture of TBHP and TBA under reduced pressure of up to 300 mm Hg and separating a liquid TBHP concentrate containing at least 65 w...	04/14/1992
4891101	Purification of tertiary hydroperoxides containing primary and secondary hydroperoxide contaminants Primary and secondary hydroperoxide contaminants in a tertiary hydroperoxide composition obtained by oxidation of a branched hydrocarbon are removed by contacting the tertiary hydroperoxide with a carboxylic acid derivative such as an anhydride and a basi...	01/02/1990
4670609	Dihydric phenol recovery process An improved process for the manufacture of a dihydric phenol such as hydroquinone wherein a dialkylbenzene is oxidized to a dihydroperoxide, the dihydroperoxide being extracted from the oxidate by a caustic solution, leaving an organic phase for recycle t...	06/02/1987
4584413	Purification of tertiary butyl hydroperoxide containing primary and secondary alkyl hydroperoxide contaminants This invention relates to the purification of tertiary butyl hydroperoxide containing minor amounts of primary and secondary alkyl hydroperoxide contaminants obtained by the oxidation of isobutane by contacting the tertiary butyl hydroperoxide with at lea...	04/22/1986
4408083	Method of treating hydroperoxide mixtures Disclosed is a method of treating hydroperoxide mixtures, which comprises bringing an oily hydroperoxide mixture containing (A) an aromatic hydroperoxide having a hydroperoxymethyl group directly bonded to the aromatic nucleus and (B) an aromatic hydroper...	10/04/1983
4381222	Process for the distillative separation of tertiary alkyl hydroperoxides and ditertiary alkyl peroxides A process for the distillative separation of tertiary alkyl hydroperoxides of the formula wherein R is a tertiary alkyl group with 4 to 6 carbon atoms from the corresponding di-tertiary alkyl peroxides resulting during their preparation, which process com...	04/26/1983
4371721	Selective cracking of disubstituted benzenes having polar substituents A process for selective cracking of 1,4-disubstituted benzene compounds having at least one polar substituent. Mixtures containing isomers of such a compound are brought into contact with a specified type of shape selective crystalline zeolite catalyst un...	02/01/1983
4293720	Process for preparation of hydroperoxides Disclosed is a process for the preparation of hydroperoxides comprising liquid-phase oxidizing an aromatic compound having a secondary alkyl group with molecular oxygen in the presence of a basic aqueous solution and a copper compound catalyst, wherein an...	10/06/1981
4271321	Process for the preparation of araliphatic dihydroperoxides Process for the preparation of araliphatic dihydroperoxides which comprises oxidizing a hydrocarbon of the formula: ##STR1## with oxygen or an oxygen-containing gas, (2) extracting the resulting dihydroperoxide with an alkali metal hydroxide solution...	06/02/1981
4257852	Distillation of aqueous tertiary butyl hydroperoxide Hazards are dealt with by appropriate placement of high heat capacity flame arrestor packings at suitable zones in the flow of the process streams comprising vapors of flammable mixture containing water and more than 10 mol % tertiary butyl hydroperoxide ...	03/24/1981
4230890	Method of recovering dialkylbenzene dihydroperoxide Separation of diisopropylbenzene dihydroperoxide from a diisopropylbenzene oxidation reaction mixture by treating the reaction mixture with concentrated alkali metal hydroxide and recovering the alkali metal salt of diisopropylbenzene dihydroperoxide in h...	10/28/1980
4160000	Extraction of hydroperoxides A hydroperoxide containing reaction mixture also containing a corresponding unreacted hydrocarbon is treated with an aqueous alcoholic solvent, e.g., aqueous methanolic solvent, to provide in a first step an extract containing a high percentage of hydrope...	07/03/1979
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 the oxidation effluent with an aqueous alcoholic base, (2) ...	10/17/1978
4108907	Process for the preparation of polyalkylbenzene hydroperoxides Polyalkylbenzene hydroperoxides are prepared from a homogeneous solution at increased rates in the presence of sulfolane from polyalkylbenzenes which are poorly soluble or insoluble in sulfolane by preoxidizing the polyalkylbenzene to an oxidation level o...	08/22/1978
4080387	Process for concentration of cyclohexane oxidate A cyclohexane oxidate containing from about 2% to about 12% cyclohexyl hydroperoxide is modified by the addition of tertiary butyl alcohol. A feedstock containing the cyclohexane oxidate and from about 13% to about 67% tertiary butyl alcohol is directed t...	03/21/1978
4059637	Method for extraction of dihydroperoxide A method for extracting a dihydroperoxide of a dialkylbenzene of the formula, ##STR1## wherein each R1, R2, R3 and R4 is independently a lower alkyl group, from an aqueous alkali solution of the said d...	11/22/1977
4002687	Process for the hydroperoxidation of branched alkanes in a plurality of stages, comprising washings between the said stages Process, and resulting product, for improved hydroperoxidation of branched alkanes of at least 4 carbon atoms, especially useful in preparation of isoprene from isopentane; comprising the substantial elimination of acetic acid and similar by-products in t...	01/11/1977
4001338	Purification of dialkylbenzene dihydroperoxide An improved method for separating para-dialkylbenzene monohydroperoxide from crude solid para-dialkylbenzene dihydroperoxide which comprises treating the solid dihydroperoxide with a liquid hydrocarbon to form a mixture, heating the mixture to a temperatu...	01/04/1977
3993696	Method for recovering hydroperoxide Diisopropylbenzene monohydroperoxide which is usable for the oxidation of diisopropylbenzene without prevention of the oxidation, is recovered from an oxidation product solution of diisopropylbenzene by steam-distilling the oxidation product solution at p...	11/23/1976
3959381	Phenol and cyclohexanone manufacture Method of producing phenol and cyclohexanone in enhanced yields consisting essentially of contacting cyclohexylbenzene, preferably in the presence of a member selected from the group consisting of cumene and cumene hydroperoxide, with an oxygen containing...	05/25/1976
3956397	Process for extracting cycloaliphatic hydroperoxides Cycloaliphatic hydroperoxides are extracted from the reaction mixtures obtained by oxidising the corresponding cycloaliphatic hydrocarbons with the aid of a polar aprotic solvent which is not miscible with the hydrocarbon, said solvent being a polymethyle...	05/11/1976

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Class 568/576 - Purification or recovery