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WO/2008/140948A1 |
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 hydropero...
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WO/2008/128638A1 |
In a process for producing hydroperoxides, an alkylaromatic compound of general formula (I): in which R1 and R2 each independently represents hydrogen or an alkyl group having from 1 to 4 carbon atoms, provided that R1 and R2 may be join...
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WO/2008/129757A1 |
A process for the production of bisphenol A which is improved in order that a low-viscosity slurry of crystals having large diameters can be formed in batch crystallization to enable smooth changeover from batch crystallization to contin...
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WO/2008/123530A1 |
Disclosed is a solid acid catalyst comprising a carbonaceous material having a sulfonate group, which is useful for various acid catalyst reactions including the hydration of an olefin and has a high reaction activity. A solid acid catal...
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WO/2008/120666A1 |
Disclosed is a method for producing a bisphenol compound, which enables to produce a bisphenol compound with high conversion rate and high selectivity. Also disclosed is a cation-exchange resin catalyst having high activity. Specifically...
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WO/2008/111521A1 |
Disclosed is a method for producing an iodizing agent, which is characterized in that an iodine molecule is electrolyzed in a solution using an acid as a supporting electrolyte. This method for producing an iodizing agent enables to prod...
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WO/2008/107109A1 |
Process for the preparation of hydroxytyrosol, characterized by reacting 4- chloroacetyl-catechol with a metal formate and formic acid in an aqueous solvent optionally containing a lower alkanol and catalytically hydrogenating the 4- hyd...
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WO/2008/101617A1 |
In a process for oxidizing sec-butylbenzene to the corresponding hydroperoxide, a feed containing sec-butylbenzene is contacted with an oxygen- containing gas in a reactor comprising a gas inlet and a gas outlet for said oxygen- containi...
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WO/2008/102664A1 |
A process in which a ketone is directly reacted with an aromatic compound in a single reaction step to obtain the corresponding alkylated aromatic compound in a higher yield. An aromatic compound is reacted with a ketone and hydrogen in ...
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WO/2008/102913A1 |
Disclosed is a sulfonic acid group-containing carbonaceous material, which is useful as a solid acid catalyst for various reactions such as hydration of an olefin or acid decomposition reaction of a hydroperoxide. The sulfonic acid group...
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WO/2008/100165A1 |
The invention relates to producing bisplienol A from phenol and acetone by way of catalytic condensation in the presence of promoted, sulfonated ion- exchange resins, with using fractional crystallization to isolate the p,p'-BPA isomer. ...
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WO/2008/098676A1 |
A process for producing sec-butylbenzene comprises reacting benzene with at least one linear butene under alkylation conditions and in the presence of a catalyst comprising at least one molecular sieve having an X-ray diffraction pattern...
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WO/2008/096763A1 |
Disclosed is a phase transfer catalyst which enables to synthesize a poly(fullerene hydroxide) having a pale color, excellent antioxidant ability and a high water-solubility, has no nitrogenated functional group other than a hydroxy grou...
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WO/2008/091379A1 |
Alkoxy aromatic compounds are conveniently dealkylated to the corresponding phenolic compounds by treatment with aluminum chloride/N,N-dimethyl aniline complex. Aromatic poly O-demethylation is a unique feature of this invention. This pr...
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WO/2008/090460A1 |
Hydroxytyrosol is extracted from olives and/or from the solid residues of olives after the extraction of olive oil, by carrying out acid hydrolysis at a temperature within the range of 110°C to 140°C and at a pH within the range of 1.0...
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WO/2008/085512A1 |
Three different reaction steps were combined to provide methods for preparing p-hydroxystyrene and p-hydroxycinnamic acid monomers from tyrosine. The three steps include reductive alkylation of tyrosine, followed by oxidation to the N-ox...
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WO/2008/080832A2 |
The present invention relates to the use of a preferably transition metal-free carbonitride as a catalyst, and to a supported catalyst comprising the said carbonitride. The carbonitride catalysts proved effective in the cyclization of or...
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WO/2008/083064A1 |
The present invention provides a process for decomposing a cumene hydroperoxide to produce phenol and acetone including: (1) introducing a process stream (21) containing cumene hydroperoxide into a reaction vessel (40); (2) introducing i...
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WO/2008/065939A1 |
Disclosed is an adamantane derivative having adequate optical characteristics such as transparency and (long-term) light resistance, adequate electrical characteristics such as long-term heat resistance and dielectric constant, and good ...
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WO/2008/038801A1 |
A method of synthesizing a diol or a polydiol by reductively coupling carbonyl compounds in a solvent with the use of 12CaO.7Al2O3 having 1019 cm-3 or more but not more than 2.3x1021 cm-3 electrons per cage as a reducing agent. A method ...
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WO/2008/029018A1 |
The present invention relates to a process for preparing highly pure hydroquinone freed of the impurities resulting from its preparation process. The process of the invention is characterized in that it comprises at least the following s...
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WO/2008/030299A1 |
A strong-acid cation exchange resin comprising a plurality of acid groups which are partially neutralized with a cation of formula (I); wherein R1 at each occurrence independently is hydrogen or a Ci-4-alkyl group, R2 at each occurrence ...
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WO/2008/023438A1 |
A process for producing 2-fluoro-6-halophenols as intermediates; a process for producing 2-alkoxy-3-fluorophenols, and further 1,2-dialkoxy-3-fluorobenzenes, from the 2-fluoro-6-halophenols; a second process for producing 1,2-dialkoxy-3-...
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WO/2008/020112A1 |
The invention relates to a semi-finished product, which is manufactured from raw liquid, raw extract or raw powder obtained from wood material, an end product composition for skin or hair care being obtained from the semi-finished produc...
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WO/2008/012321A1 |
A subject-matter of the present invention is a novel process for the synthesis of (E)- stilbene derivatives targeted at obtaining in particular resveratrol and piceatannol.
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WO/2008/012108A2 |
The invention relates to a process for the preparation of polyhydroxylated stilbenes starting from a compound of the formula (I) formula (VI) or formula (IX).
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WO/2008/011508A1 |
Xanthene compounds are disclosed having fluorescence at multiple wavelengths. Also disclosed are methods for their synthesis and use. Some of the compounds fluoresce at three wavelengths, emitting white light. Uses include the imaging of...
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WO/2008/003737A1 |
The invention relates to a novel method for producing 3,3'-dihydroxyisorenieratine of formula (I), and to novel intermediate products obtained according to said method.
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WO/2008/003742A1 |
The invention relates to an improved method for producing 3,3'-dihydroxyisorenieratine of formula (I), and to novel intermediate products obtained according to said method.
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WO/2008/000955A1 |
The invention relates to a method for preparing purified hydroquinone and forming same. The invention is intended to be used to obtain a purified hydroquinone from raw compounds essentially containing hydroquinone associated with very sm...
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WO/2008/000956A1 |
The present invention relates to a new form of hydroquinone in flake form, and to the process for obtaining it. The process of the invention for preparing hydroquinone flakes is characterized in that it comprises the following steps: - i...
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WO/2008/000954A2 |
The present invention relates to a process of separation and purification allowing purified hydroquinone to be obtained from crude mixtures essentially containing hydroquinone in combination with very small amounts of impurities includin...
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WO/2008/000957A2 |
The present invention relates to a process for preparing hydroquinone devoid of the impurities resulting from its preparation process. The process for preparing purified hydroquinone from a crude hydroquinone essentially containing hydro...
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WO/2007/147897A1 |
The present invention relates to a process for preparing optically active 2-halo-l-phenylethanol derivatives by the catalytic asymmetric transfer hydrogenation of the corresponding ketones, and to optically active conversion products obt...
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WO/2007/143239A2 |
A process for producing sec-butylbenzene comprises reacting benzene with at least one C4 alkylating agent under alkylation conditions and in the presence of a particulate alkylation catalyst comprising zeolite beta and/or at least one mo...
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WO/2007/137020A2 |
A method for decomposing di(phenylalkyl)peroxides to hydroxybenzenes and phenylalkene(s) using solid catalyst.
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WO/2007/132575A1 |
A process for producing bisphenol A which comprises: (A) a condensation reaction step in which phenol is condensed with acetone in the presence of an acid catalyst; (B) a concentration step in which the reaction mixture is concentrated; ...
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WO/2007/130040A1 |
An improved process for the manufacture of a polyphenol compound such as bisphenol-A by introducing into a reaction zone a phenolic compound reactant, a carbonyl compound reactant, and a catalyst promoter comprising bismethylthiopropane ...
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WO/2007/126483A1 |
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 oxides, modified metal oxides, activated c...
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WO/2007/126542A2 |
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 anti-solvent to the solution B to form a so...
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WO/2007/118601A1 |
The present invention relates to method for producing phenol comprising: a) oxidizing cumene to form an oxidation product containing cumene hydroperoxide; b) cleaving said oxidation product using an acidic catalyst to form a cleavage pro...
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WO/2007/118600A1 |
The present invention relates to a continuous method for treating a crude phenol stream comprising methylbenzofuran and hydroxyacetone by passing the crude phenol stream through at least two reactors connected in series the reactors cont...
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WO/2007/116967A1 |
Disclosed is a novel bisphenol compound represented by the following formula (1). (In the formula (1), R represents an alkyl group having 1-6 carbon atoms, an aryl group having 6-12 carbon atoms, a nitro group, an amino group or a haloge...
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WO/2007/110883A1 |
The present invention relates to a single step, microwave induced process for the preparation of substituted stilbenes and its analogs. Particularly, provides a method for the preparation of commercially important 2- or 4-hydroxy substit...
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WO/2007/110881A1 |
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 arylethenes like styrenes or stilbenes in one pot...
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WO/2007/108259A1 |
A process for producing bisphenol A with the use of a horizontal belt filter, the horizontal belt filter used for solid-liquid separation of slurry formed by crystallization of bisphenol A/phenol adduct from a phenol solution of bispheno...
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WO/2007/105847A1 |
The present invention relates to a method of manufacturing purified urushiol for addition to synthetic resin and purified urushiol manufactured thereby, and more particularly, to a method of manufacturing purified urushiol for addition t...
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WO/2007/103478A2 |
Tyrosine was converted to p-hydroxystyrene in a two-step reaction without purification of individual intermediates. Conditions were determined for bromination of tyrosine in which reactive intermediates were formed. The mixture of these ...
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WO/2007/099162A2 |
The present invention relates to a compound of general formula (I) below in which R1, R2 and R3 represent, independently of one another, a hydrogen atom or a C1-C6 alkyl group or a (C1-C6 alkyl)carbonyl group, R4, R5, R6 and R7 represent...
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WO/2007/094124A1 |
A liquid containing one or more bis(hydroxyphenyl)propane compounds is brought into contact with a strongly acid cation-exchange resin to isomerize any bis(hydroxyphenyl)propane compound other than bisphenol A [2,2-bis(4-hydoxyphenyl)pro...
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