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| Number | Title | Issue Date |
| 6960683 | Salt forms of poorly soluble probucol esters and ethers Organic amine salts of compounds of the formula: and their pharmaceutically acceptable salts, and uses in medical therapy are provided. ... | 11/01/2005 |
| 6504065 | Method of making metal salts of 2,4,6-tri-t-butylphenol Reaction of a phenol with a metal salt of an alcohol produces a metal phenolate salt of a phenol. When a hindered phenol is used a hindered metal phenolate is produced. Such hindered metal phenolate salts are useful in driving the synthesis reaction of hi... | 01/07/2003 |
| 6444278 | 2,6-di-tert-butylphenols The present invention relates to 2,6-di-tert-butylphenols of the formula I ##STR1## in which R, A1 A2, Z1, Z2 m and n are as defined herein, and their use as stabilizers or antioxidants.... | 09/03/2002 |
| 6242609 | Method for manufacturing a color coupler used in a silver halide photographic light-sensitive material A method for manufacturing a color coupler used in a silver halide photographic light-sensitive material using an ammonium trihalide. Said method for manufacturing the color coupler comprising the following step: a step for halogenating a coupling position of ... | 06/05/2001 |
| 6114572 | Substituted phenols and thiophenols useful as antioxidant agents The present invention provides compounds of the formula ##STR1## wherein X is selected from the group consisting of ##STR2## Y is thio, oxy or a methylene group; Z is hydrogen or --C(O)--(CH2)m --Q wherein Q is hydrogen or ... | 09/05/2000 |
| 5399786 | Preparation process of tert-butylphenols The present invention has as purpose a process for the manufacture of tert-butylphenols, mainly of tertbutyl-4-phenols from a phenol and an alkyltert-butylether. The improvement consists in separating in at least two steps, the reaction of phenol alkylati... | 03/21/1995 |
| 5356976 | 2,4-dialkyl-6-sec- alkylphenols Compounds of formula I ##STR1## wherein R1 is C1 -C4 n-alkyl, isopropyl, s-butyl, cyclopentyl, cyclohexyl or -methylbenzyl, R2 is C4 -C18 tert-alkyl or ,-dimethylb... | 10/18/1994 |
| 5288927 | Para-selective butylation of phenol over fairly large-pore zeolites There is provided a process for reacting phenol with butene or butanol over fairly large-pore zeolites to give butylphenol with high para-selectivity. Particular zeolites for use in this reaction include ZSM-12 and zeolite beta. A particular butene or but... | 02/22/1994 |
| 5276215 | Alkylphenol synthesis using zeolites as catalysts, particularly dealuminized y-zeolites Disclosed is a one-step method for synthesis of alkylphenols which comprises reacting phenol with the corresponding olefin under adiabatic conditions in the presence of a zeolite catalyst, preferably a dealuminated Y-zeolite, a modified Y-zeolite, or a &#... | 01/04/1994 |
| 5245086 | Hydroxylation of phenols/phenol ethers The phenols/phenol ethers are hydroxylated by reaction with hydrogen peroxide, in the presence of a catalytically effective amount of (a) at least one alkali metal or alkaline earth metal salt of a protonic acid having a pKa in water of less than -0.1 and... | 09/14/1993 |
| 5099076 | Method for preparing p,p'-biphenol The present invention is directed to a method for the preparation of p,p'-biphenol by simplified processes achieved by batch or continuous operations which comprises using phenol and isobutylene as starting materials, allowing phenol to react with isobuty... | 03/24/1992 |
| 5091594 | Process for the production of 2,6-di-tert-butylphenol For producing 2,6-di-tert-butylphenol and products therefrom, utilizing small quantities of aluminum tris-(2-tert-butylphenolate as a catalyst by reaction of 2-tert-butylphenol with isobutene in the liquid phase, the reaction is performed in the presence ... | 02/25/1992 |
| 5024775 | Alkyl phenol stabilizer compositions for fuels and lubricants Liquid mixtures of alkyl phenols composed of from 1 to 8 wt % 2-tert-butylphenol; from 4 to 12 wt % of 2,6-di-tert-butylphenol; from 4 to 12 wt % of 2-tri-tert-butylphenol; and from 65 to 80 wt % of 2,6-di-tert-butyl-4-n-butylphenol have a balance of prop... | 06/18/1991 |
| 5012003 | Process for preparing dithiobisphenols An improved process for preparing dithiobisphenols comprising reacting an appropriate phenol with an alkali metal hydride, an alkaline earth metal hydride or mixtures thereof and subsequently reacting the product thereof with sulfur monochloride.... | 04/30/1991 |
| 4812596 | Process for the conversion of t-alkylphenol waste distillation bottoms to para-t-alkylphenol A process is provided for converting waste distillation bottoms containing t-alkylphenols with substantial unknown constituents to useable para-t-alkylphenols. The process comprises heating the waste distillation bottoms with phenol and an acid catalyst t... | 03/14/1989 |
| 4708966 | Novel anti-inflammatory agents, pharmaceutical compositions and methods for reducing inflammation The present invention relates to novel specifically-substituted phenyl compounds, especially substituted di-tert-butyl phenol derivatives, which are effective as anti-inflammatory, analgesic and/or antipyretic agents. These phenyl compounds are substitute... | 11/24/1987 |
| 4665238 | Process for the synthesis of alkylaromatic compounds Alkylaromatic compounds may be synthesized by reacting an aromatic compound with an alkylating agent comprising a mixture of gases, including carbon monoxide and hydrogen at alkylation conditions in the presence of a dual-function-catalyst. The catalyst s... | 05/12/1987 |
| 4633022 | Process for preparation of trisubstituted phenols 2,6-dialkyl substituted phenols such as 2,6-ditertiary butylphenol are reacted with formaldehyde in methyl alcohol in the presence of an inert gas and a tertiary amine catalyst to produce a bis(3,5-di-t-butyl-4-hydroxybenzyl)ether; and the bis ether subje... | 12/30/1986 |
| 4631349 | Heterogeneous catalyst process A process using heterogeneous resin-bonded aluminum phenoxide catalyst to alkylate phenols, the catalyst per se, and a process for making the catalyst. The inventive alkylation process uses ortho-tert-butylphenoxide bonded to a phenolformaldehyde condensa... | 12/23/1986 |
| 4628127 | Heterogeneous catalytic alkylation A process for producing 2,4-di-substituted phenols wherein an olefin is reacted with phenol in the presence of a heterogeneous catalyst comprising an aluminum phenoxide bonded to an acidic solid polymeric resin to preferably form 2,4-di-substituted phenol... | 12/09/1986 |
| 4599465 | Process for producing orthoalkylphenols A process for producing an orthoalkylphenol which comprises reacting phenol with an olefin in a liquid phase in the presence of an alumina catalyst, characterized in that the water content in the liquid phase of the reaction system is maintained at a leve... | 07/08/1986 |
| 4568778 | Process for producing tert-amylphenols A process for producing tert-amylphenols is described, comprising reacting isoamylene with phenols in the presence of an inorganic solid acid catalyst or an acidic ion exchange resin catalyst. This process permits efficient production of tert-amylphenols,... | 02/04/1986 |
| 4560809 | Alkylation process A process for the production of a 2,6-dialkylphenol in high yield wherein the alkyl groups are secondary or tertiary with a reduced overall production of 4-alkylphenol by-products by the aluminum phenoxide catalyzed pressure reaction of isobutylene with p... | 12/24/1985 |
| 4538008 | Preparation of ortho-alkylated phenols Secondary or tertiary alkyl phenyl ethers may be induced to undergo thermal rearrangement on alumina, aluminum phosphate, or a silica-modified alumina as catalyst to afford the isomeric ortho-alkylphenol. Such rearrangement generally occurs under milder c... | 08/27/1985 |
| 4496774 | Complex formed to separate nitrated phenolic compounds from other phenolic compounds A process is disclosed for separating nitrated phenolic compounds from other nitrated and unnitrated phenolics by treating a mixture of the phenolics with a metal halide salt. The metal halide salt preferentially forms a complex with one of the phenolics ... | 01/29/1985 |
| 4480140 | Process for alkylating phenolic compounds to produce ortho or para-monoalkylated or 2,4- or 2,6-dialkylated phenols Phenols alkylated in the ortho and/or para positions are produced in good yields and in the absence of isomers from phenolic compounds having at least two alkylateable ortho-ortho or ortho-para positions open. The phenolic compound is first partially chlo... | 10/30/1984 |
| 4479019 | Complex formed to separate nitrated phenolic compounds from other phenolic compounds A process is disclosed for separating nitrated phenolic compounds from other nitrated and unnitrated phenolics by treating a mixture of the phenolics with a metal halide salt. The metal halide salt preferentially forms a complex with one of the phenolics ... | 10/23/1984 |
| 4475001 | Process for alkylating phenolic compounds to produce ortho- or para-monoalkylated phenols or 2,4- or 2,6-dialkylated phenols Ortho- or para-monoalkylated phenols or 2,4- or 2,6-dialkylphenols can be produced from phenolic compounds in good yields and in the absence of isomers. The starting phenol which has at least two available ortho or para positions unsubstituted is converte... | 10/02/1984 |
| 4423253 | Process for separating t-butylated phenols A process is disclosed for separating t-butylated phenolic compounds from other t-butylated and unbutylated phenolics by treating a mixture of the phenolics with a metal halide salt. The metal halide salt preferentially forms a complex with one of the phe... | 12/27/1983 |
| 4398048 | Preparation of 2,4,6-trialkylphenols Substantially improved yields of 2,4,6-trialkylphenols result from alkylating a mixture of phenol and 2,6-dialkylphenol, the latter being a by-product of the alkylation reaction. This results flows from an unexpected synergistic effect accompanying transa... | 08/09/1983 |
| 4391998 | Production of para-isopropylphenol Phenol is catalytically alkylated with an isopropanol or propylene alkylating agent to form high yields of an isopropylphenol product enriched in the para-isomer of isopropylphenol. Such an alkylation process is carried out under catalytic alkylation cond... | 07/05/1983 |
| 4370506 | Terbutylating hydroxyaromatic compounds Hydroxyaromatic compounds, especially phenols, are reacted with an alkyl tert.butyl ether in the presence of an acidic catalyst and the as formed light alcoholic fractions are removed by flashing.... | 01/25/1983 |
| 4366331 | Process for production of 2,6-di-tert-alkenyl phenols There is disclosed a process for the production of 2,6-di-tert-alkyl-4-alkenyl phenols wherein the improvement comprises the reaction of a 2,6-di-tert-alkyl phenol with an allyl halide to yield the 2,6-di-tert-alkyl-4-alkenyl phenol through the use of a t... | 12/28/1982 |
| 4337370 | Process for the preparation of resorcinol derivatives 2-Substituted-4,6-di-t-butylresorcinol represented by the general formula: ##STR1## wherein R represents a straight or branched alkyl group having 1 to 20 carbon atoms, a straight or branched alkenyl group having 2 to 20 carbon atoms and at least one... | 06/29/1982 |
| 4316996 | Discoloration prevention of phenolic antioxidants Detrimental color change of phenolic antioxidants during production, storage and use in rubbers is inhibited by adding during the synthesis of the phenolic antioxidant a disubstituted hydroxylamine to the catalyst neutralization solution and a substituted... | 02/23/1982 |
| 4308407 | Chemical process Phenols with a methyl group substituted on the phenolic benzene ring, such as 2,6-di-tert-butyl-p-cresol, can be produced by reacting a halomethyl group substituted on a phenol such as 2,6-di-tert-butyl-4-chloromethylphenol, with hydrogen in the presence ... | 12/29/1981 |
| 4260832 | Alkylation of 2,6-di-tert-alkylphenols with alkanediols There is a process disclosed for alkylating the nucleus of a phenol, said process comprising reacting an , ωalkanediol containing from 3 to 8 carbon atoms with a phenol having an unsubstituted nuclear position para to the phenolic hydroxyl group; ... | 04/07/1981 |
| 4122287 | Method of preparing 2,6-di-tert.butyl-4-methylphenol A method of preparing 2,6-di-tert.butyl-4-methylphenol comprising reacting 2,6-di-tert.butylphenol with formaldehyde and dimethylamine in a medium of methanol or ethanol at a temperature within the range of from 80° to 90° C to give a reaction mass cont... | 10/24/1978 |
| 4101591 | Ethynylbenzene compounds and derivatives thereof Haloloweralkyl ethynylbenzene compounds and their derivatives which are useful for the treatment for the relief of inflammation, pain and fever.... | 07/18/1978 |
| 4072724 | Process for preparing hindered alkenyl phenols Hindered alkenyl phenols, all of which can be used as antioxidants, and some of which can be used as monomers, can be prepared by the dehydrohalogenation of the -haloalkyl phenol.... | 02/07/1978 |
