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| Number | Title | Issue Date |
| 7288683 | Method for making alkylated phenols An alkylation method comprises reacting a hydroxy aromatic compound with an alkyl alcohol in the presence of an alkylation catalyst comprising a metal oxide wherein the alkylation catalyst, has a surface area to volume ratio of about 950 to about 4,000 m2... | 10/30/2007 |
| 7227040 | Process for forming branched composition catalytically by carbon-hydrogen bond activation in a saturated moiety A branched composition can be formed by reacting a reagent containing a saturated hydrocarbon moiety in the presence of (a) a catalyst capable of activating a carbon-hydrogen bond therein and (b) a branching reagent having a moiety that binds to the carbon atom in t... | 06/05/2007 |
| 7208438 | Catalyst and method for the alkylation of hydroxyaromatic compounds A method of making a catalyst comprising mixing a metal oxide precursor and a pore former to form a metal oxide precursor mixture and calcining the metal oxide precursor mixture in the presence of a flowing gas having a flow rate to form the catalyst comprising meta... | 04/24/2007 |
| 7087705 | Process for the monoalkylation of dihydroxy aromatic compounds A continuous process comprising: contacting a mixture comprising dihydroxy aromatic compound, water and an alkylating agent with a catalyst system in the presence of a flowing carrier gas, to form a mono alkylated dihydroxy aromatic compound, wherein the catalyst sy... | 08/08/2006 |
| 7081432 | Alkylation catalyst and method for making alkylated phenols An alkylation catalyst comprises a metal oxide wherein the catalyst has a surface area to volume ratio of about 950 m2/m3 to about 4000 m2/m3. ... | 07/25/2006 |
| 7078579 | Process for the isomerization of a vinylidene olefin A process for the double bond isomerization of a vinylidene olefin, comprising contacting a feed comprising the vinylidene olefin with an isomerization catalyst which comprises a molecular sieve in an acidic form, which molecular sieve comprises pores which have a p... | 07/18/2006 |
| 7063982 | Process of vaporizing and reacting a liquid feed A process for evaporating a liquid feed and reacting said feed in the presence of catalyst to make product within a reactor having both an evaporation zone and a reaction zone comprises the steps of providing packing in the evaporation zone, providing catalyst in th... | 06/20/2006 |
| 7041865 | Process for the isomerization of an olefin A process for the double bond isomerization of an olefin, which process comprises contacting a feed comprising the olefin with an isomerization catalyst, wherein prior to contacting the feed with the isomerization catalyst one or more components of the feed are pret... | 05/09/2006 |
| 6951966 | Orthoalkylation catalyst for phenol and process for producing orthoalkylated phenol with use thereof The orthoalkylation catalyst for phenols of the invention is one produced by calcining a catalyst precursor comprising basic magnesium carbonate (a) and magnesium oxide (b) optionally together with manganese oxalate (c), the basic magnesium carbonate (a) and magnesi... | 10/04/2005 |
| 6939995 | Process for the preparation of isopropanol Process for the preparation of isopropanol is provided, wherein a benzene-containing feed of acetone is hydrogenated to obtain isopropanol and hydrogenation products of benzene. Combination of such a process with a process for the preparation of phenol and co... | 09/06/2005 |
| 6846962 | Selective production of o-alkylphenols In a method for the production of o-alkyl phenols by conversion of phenol with an alkanol at elevated temperature in the gas phase in the presence of a metal catalyst, the conversion takes place in at least two stages wherein the alkanol/phenol molar ratio in each r... | 01/25/2005 |
| 6617476 | Process for producing aromatic ring alkylated phenols A process for producing an aromatic ring alkylated phenols, wherein said process comprises reacting phenols represented by the general formula (1): ##STR1## wherein, each of R1, R2, R3, R4 and R5 inde... | 09/09/2003 |
| 6593501 | Process for the preparation of 2,6-xylenol A process for producing an aromatic hydroxyl compound alkylated at the ortho position in high yield by subjecting an aromatic hydroxyl compound and an alkyl alcohol to a gas phase catalytic reaction in the presence of a metal oxide catalyst. The aromatic ... | 07/15/2003 |
| 6417410 | Method for producing ortho-alkylated phenols A method for producing ortho-alkylated phenols comprising reacting phenols represented by the general formula (1) with monohydric or dihydric alcohol in the presence of germanium oxide under conditions in which said alcohol is in the supercritical conditi... | 07/09/2002 |
| 6303801 | Process for producing alkyl-substituted hydroquinones A process for producing an alkyl-substituted hydroquinone, wherein said process comprises reacting a hydroquinone compound represented by the general formula (1) ##STR1## wherein R1 and R2 independently represent a hydrogen atom or a... | 10/16/2001 |
| 6291724 | Suppression of highly alkylated phenols in the catalytic alkylation reaction of phenol Selective catalytic reduction of the formation of alkylated phenols by transalkylation of ortho- and para-positions of alkylated phenols is accomplished by reacting ortho- and/or para-alkylated phenols with unreacted alkylated phenols in the presence of a... | 09/18/2001 |
| 6239317 | Process for the production of halogeno-o-hydroxydiphenyl compounds There is described a four step process for the production of halogeno-o-hydroxydiphenyl compounds having the formula ##STR1## in which X is --O--or --CH2 --; m is 1 to 3; and n is 1 or 2; wherein in the first step, a diphenyl compound is chlorinated... | 05/29/2001 |
| 5847237 | Catalyst for ortho-alkylation of phenols, a precursor thereof, and production of ortho-alkylated phenols by use of said catalyst There is disclosed a catalyst for ortho-alkylation of phenols obtained by calcination of a catalyst precursor comprising a dry mixture of: (a) manganese oxalate; (b) phenolic resin fine particles; and (c) at least one magnesium compound selected from the group cons... | 12/08/1998 |
| 5817886 | Process for production of alkyl ether of phenol and catalyst used therein The present invention provides a process for producing an alkyl ether of a phenol from a phenol and an alcohol at a selectivity and a yield higher than in conventional processes, stably over a long period of time. The process is characterized by alkyl-eth... | 10/06/1998 |
| 5633411 | Method for production of allyloxystyrene compounds Allylic styrene ether compounds of the formula: ##STR1## where R1 is an optionally substituted allylic or propargyl hydrocarbon group, and R2, R3, and R4 are independently H, C1-6 hydrocarbon or ... | 05/27/1997 |
| 5488173 | Process for selective ortho-methylation of cyclohexanones in the vapor phase A cyclohexanone having at least one ortho-hydrogen is selectively methylated in the ortho-position in the vapor phase. High conversion of the selected cyclohexanone and high selectivity in the ortho-position are obtained. The reaction products include 2-m... | 01/30/1996 |
| 5371306 | Modified magnesium oxide catalyst The present invention relates to a novel oxide catalyst, more specifically, a novel modified magnesium oxide catalyst which is highly active and selective for ortho-alkylation of phenol. The catalysts for phenol alkylation of the invention are represented as ... | 12/06/1994 |
| 5344997 | Alkylation of aromatics using a fluorided silica-alumina catalyst A fluorided silica-alumina catalyst, particularly one with a silica:alumina ratio in the range of 1:1-9:1 containing from 1 to 6 weight percent fluoride, is particularly effective in the liquid phase alkylation of benzene by linear olefins to produce line... | 09/06/1994 |
| 5274174 | Process for the production of poly(4-hydroxystyrene) A method for producing 4-acetoxystyrene by heating 4-acetoxyphenylmethylcarbinol, with an acid catalyst, at a temperature of from about 85° C. to about 300° C. under a pressure of from about 0.1 mm HgA to about 760 mm HgA for from about 0.2 minutes to a... | 12/28/1993 |
| 5256809 | Method for preparing a salt of 4-hydroxystyrene and for preparing 4-tertiary-butoxycarbonyloxystyrene therefrom 4-Acetoxystyrene is reacted with a base in a solvent to form a salt of 4-hydroxystyrene via saponification. Alternatively, 4-hydroxystyrene is reacted with a base to form a salt of 4-hydroxystyrene. In the latter case, the 4-hydroxystyrene is prepared by ... | 10/26/1993 |
| 5175377 | Process for preparing an ortho-alkylated phenol The present invention provides an improved process for the production of ortho-alkyl phenols by vapor phase reaction of a phenol having at least one ortho-hydrogen with an alcohol, the improvement comprises soaking manganic oxide in an aqueous solution of... | 12/29/1992 |
| 5132468 | C-alkylation of hydroquinone or monoethers thereof The alkyl hydroquinones, e.g., methyl hydroquinone (a useful intermediate in the preparation of the monomer methyl hydroquinone diacetate, itself used for the synthesis of thermotropic polymers), are prepared by reacting (C-alkylating) hydroquinone or a m... | 07/21/1992 |
| 5105029 | Process for recovering a lower alcohol from a catechol-lower alcohol reaction product solution A lower alcohol, for example, ethyl alcohol, is recovered from a reaction mixture resulted from a reaction of catechol with a lower alcohol in such a manner that the reaction mixture is distilled and separated into a distilled light vapor fraction compris... | 04/14/1992 |
| 5097079 | Zinc-containing ortho-alkylation catalyst precursor and catalyst, and process of use in alkylation of phenols Catalyst precursor compositions comprising a mixture of magnesium oxide or a source of magnesium oxide and a water insoluble zinc compound are described. The compositions are calcinable to a catalyst that is useful in reactions for the ortho-alkylation of... | 03/17/1992 |
| 5087772 | Method for preparing 4-hydroxystyrene A method for preparing 4-hydroxystyrene is disclosed. The method comprises reacting 4-acetoxystyrene with a suitable alcohol in the presence of a catalytic amount of a suitable base.... | 02/11/1992 |
| 5059727 | Method for alkylation of phenols, and catalyst therefor A method of alkylating phenols which comprises reacting phenols having a hydrogen atom in at least one of the ortho-positions with regard to the hydroxyl group with an alcohol in a gaseous phase under heat in the presence of a catalyst comprising iron oxi... | 10/22/1991 |
| 5041641 | Pentafluorophenyl derivatives, methods of production thereof, and method of optical resolution of chiral carboxylic acids Pentafluorophenyl derivatives are expressed by the formula (I): ##STR1## where X represents an alkyl group having from 1 to 4 carbon atoms or a halogen atom; Y represents any group of --CH2 OH, --COOH, --COCl, --CON1 R2 | 08/20/1991 |
| 4954475 | Zinc-containing ortho-alkylation catalyst precursor and catalyst, and process of use in alkylation of phenols Catalyst precursor compositions comprising a mixture of magnesium oxide or a source of magnesium oxide and a water insoluble zinc compound are described. The compositions are calcinable to a catalyst that is useful in reactions for the ortho-alkylation of... | 09/04/1990 |
| 4933509 | Method of ortho-alkylating phenol A method is provided for ortho-alkylating phenol by passing a mixture of phenol and methanol through a heated magnesium oxide catalyst. The magnesium oxide catalyst is made by calcining magnesium carbonate and thereafter further heating the calcined produ... | 06/12/1990 |
| 4906793 | Silica-titania hydrocarbon conversion catalyst Crystalline silica-titania catalyst compositions, optionally containing magnesium, are disclosed; the titanium is introduced through the use of organo-titanate chelates wherein the titanium has a coordination number of at least 5. The compositions are use... | 03/06/1990 |
| 4876398 | Preparation of ortho-alkylated phenols in the presence of a catalyst prepared by co-precipitation process A process for preparing an ortho-alkylated phenol is conducted by a vapor phase catalytic reaction at 200°-500° C. by reacting a vapor phenol compound selected from phenol, ortho-cresol and a mixture of phenol mixed with ortho-cresol with a vapor alcoho... | 10/24/1989 |
| 4851591 | Magnesium-containing catalyst activated under vacuum, in nitrogen, or in air, and use in an ortho-alkylation process A catalyst precursor comprising a magnesium compound or material, optionally also containing other metal compounds, is activated for use by calcining at an elevated temperature in the presence of air or nitrogen, or under vacuum. The active catalyst which... | 07/25/1989 |
| 4814531 | Silica-titania hydrocarbon conversion catalyst Crystalline silica-titania catalyst compositions, optionally containing magnesium, are disclosed; the titanium is introduced through the use of organo-titanate chelates wherein the titanium has a coordination number of at least 5. The compositions are use... | 03/21/1989 |
| 4753913 | Gas-phase alkylation of phenols, and a catalyst for this purpose The proposed catalyst for the gas-phase alkylation of phenols is based on magnesium oxide, contains up to 0.4% by weight of alkali metal oxide and is mechanically stabilized with from 1 to 8% by weight, based on the total weight of the catalyst, of graphi... | 06/28/1988 |
| 4677089 | Catalyst prepared from manganese carbonate and a magnesium compound A catalyst precursor comprised of a dry admixture of manganese carbonate and at least one material selected from among magnesium carbonate, basic magnesium carbonate and magnesium hydroxide. The precursor is calcinable at elevated temperatures to an activ... | 06/30/1987 |
