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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...
6444278 2,6-di-tert-butylphenols  
The present invention relates to 2,6-di-tert-butylphenols of the formula I in which R, A 1 A 2 , Z 1 , Z 2 m and n are as defined herein, and their use as stabilizers or antioxidants.
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...
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)--(CH 2 ) m ...
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...
5356976 2,4-dialkyl-6-sec- alkylphenols  
Compounds of formula I ##STR1## wherein R 1 is C 1 -C 4 n-alkyl, isopropyl, s-butyl, cyclopentyl, cyclohexyl or α-methylbenzyl, R 2 is C 4 -C 18 tert-alkyl or α,α-dimethylbenzyl, R 3 is C...
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...
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,...
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...
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...
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 %...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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.
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...
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...
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...
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...
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 α, ωalkanediol containing from 3 to 8 carbon atoms with a phenol having an unsubstituted...
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...
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 α-haloalkyl phenol.
4066707 Method for manufacture of diphenols and monoalkyl ethers of diphenols  
Diphenols, alkyl ethers and aryl ethers of diphenols are produced by subjecting phenols, alkyl ethers and aryl ethers of phenols to oxidation with an organic per-acid in the presence of at least...
4045499 Process for the preparation of 1,1,3,3-substituted hydroxy indanes  
1,1,3,3-SUBSTITUTED HYDROXY INDANES HAVING THE FORMULA ##STR1## wherein R 1 , R 2 and R 3 , which may be the same or different, are selected from the group of hydrogen, halogen and optionally...
3941793 Quinoline 2 carboxylic acids used in metal extraction processes  
Quinoline-2-carboxylic acids having in the 4-position a halogen atom or an optionally substituted hydrocarbyl group attached through an oxygen atom, optionally substituted by a hydrocarbyl group in...
3933927 Phenol transalkylation process  
Phenols having an unsubstituted ortho position are transalkylated in the ortho position by mixing them with an ortho-alpha-branched alkylphenol (e.g., 2,6-di-sec-butylphenol) and an aluminum...
3927123 Process for the preparation of alkylphenols  
Phenols nuclear substituted by 1 to 3 straight-chain or branched-chain alkyl substituents of 1 to 10 carbons are prepared by oxidizing the aldehyde group of the corresponding alkyl substituted...
3899540 Hydroxylation process  
Hydroxylated aromatic compounds such as phenols are prepared by reacting one or more aromatic compounds with hydrogen peroxide in the presence of trifluoroacetic acid and hydrogen fluoride at a...
3898289 Hydroxy-substituted aromatic hydrocarbon process  
Hydroxy-substituted aromatic hydrocarbons are produced by contacting a cycloaliphatic oxirane compound with a Group VIII dehydrogenation catalyst at an elevated temperature.
3887477 Alkyl phenol-hydrazine antioxidants  
Composition particularly adapted to stabilize polymeric organic materials such as α-olefin polymers and copolymers against the deleterious effects of oxygen, heat and light comprising a mixture of...
3880937 Process for preparing 3-alkyl-5-t-butylphenols  
A process for preparing 3-alkyl-5-t-butylphenols which comprises contacting 3-alkyl-6-t-butylphenols with aluminum chloride at a temperature below 70°C whereby the t-butyl group at the 6-position...
3878255 Process for preparing 3,5-dialkyl phenols  
A process for preparing 3,5-dialkyl phenols is provided. In one embodiment an ortho-, para-, or meta-monoalkyl phenol is caused to isomerize and/or disproportionate to the 3,5-dialkyl phenol in...
3875247 Process for preparing alkylphenols by oxidising alkylbenzaldehydes  
O- AND/OR P-ALKYLPHENOLS WITH 1 OR 2 C 1 -10 alkyl groups are prepared by oxidising the corresponding alkylbenzaldehyde with hydrogen peroxide in the presence of an acid of pK a less than 3 which...
3714268 PROCESS FOR PRODUCING GRANULATED FREE-FLOWING 2,6-DITERTIARYBUTYL-4-METHYLPHENOL  
A process for granulating 2,6-ditertiarybutyl-4-methylphenol, which comprises recrystallizing 2,6-ditertiarybutyl-4-methylphenol from a mixture of water and at least one organic solvent of hexane,...
3692842 HYDROXYLATION OF AROMATIC COMPOUNDS  
Nuclear hydroxylation of aromatic compounds is effected by treating an aromatic compound with hydrogen peroxide in the presence of a catalyst comprising a metal derivative of a phthalocyanine at...
3625983 OXIDATION OF 2,4,6-TRI-TERT-ALKYLPHENOLS WITH AN ALKALI METAL HYDROXIDE CATALYST  
Oxidation of 2,4,6-tri-tert-alkylphenols using an alkali metal hydroxide catalyst such as potassium hydroxide yields 2,6-di-tert-alkyl-p-benzoquinone. The reaction is promoted by the addition of...
3526668 ALLYL PHENOLS  
3518318 OCTADIENYL PHENOLS  
3504056 TRI(DIALKYLAMINOPHENYL THIOALKYLENE)PHOSPHITES  
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