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4218567 |
Process for aromatic ethers
A process for the preparation of aromatic ethers by the bromination of a compound of the formula ##STR1## wherein R 1 , independently, is hydrogen, hydroxy, lower alkoxy, lower alkyl; m is an...
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4213917 |
Esterification of aromatic aldehydes
Aromatic esters are formed directly from aromatic aldehydes by reacting the aldehyde with molecular oxygen and an alcohol in the presence of a heterogeneous molybdenum oxidation catalyst.
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4142036 |
Polyphenylcarboxylic acid adamantane compounds and polymers prepared therefrom
Adamantane compounds having 2 to 4 bridgehead positions substituted with phenylacyl moieties are prepared by oxidizing poly(phenylalkyl) adamantanes. The polyacyl adamantane compounds are useful as...
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4126755 |
Process for the preparation of dimethyl terephthalate
A process for producing dimethyl terephthalate from high-boiling tarry residues from the combined oxidation of p-xylene and p-toluate in the liquid phase, esterification of the resulting acids with...
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4112240 |
Process for the manufacture of light colored dipropyleneglycol dibenzoate
Process for production of dipropyleneglycol dibenzoate isomer mixture of the formulas: ##STR1## A crude methyl benzoate containing at least 80 wt.% methylbenzoate, which is a by-product of...
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4096340 |
Process for the preparation of dimethyl terephthalate
In the process for preparing dimethyl terephthalate by oxydizing p-xylene and/or methyl p-toluate with molecular oxygen or a molecular oxygen-containing gas in the presence of a heavy metal...
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4092481 |
Process for the recovery of dimethyl terephthalate and of intermediates from the dimethyl terephthalate manufacture
A process for the production of dimethyl terephthalate and intermediate products of the dimethyl terephthalate manufacture from the high-boiling by-products obtained during the air oxidation of...
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4032563 |
Process for the recovery of high purity diesters of terephthalic or isophthalic acids
A process is disclosed for producing the dimethyl esters of aromatic dicarboxylic acids wherein the acid is esterified with a low molecular weight alcohol, the product is crystallized and separated...
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3989600 |
Distilling H.sub.2 O from aromatic carboxylic acid at a pH exceeding 9
A process for treating an aqueous solution containing organic compounds and having a high chemical oxygen demand (COD) by distilling the aqueous solution at a pH not lower than 9, and recovering...
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3956362 |
Cooxidation process for the production of dimethyl terephthalate
Disclosed is an improvement in the cooxidation process for making dimethyl terphthalate (DMT). In the cooxidation process an oxidate comprising monomethyl terephthalate and p-toluic acid is...
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3923881 |
Process for the preparation of C4 dicarboxylic acids from 2-butene
Process for the preparation of C 4 dicarboxylic organic acids such as fumaric and succinic acids as well as mixtures thereof by the catalytic vapor phase oxidation of 2-butene at temperatures of...
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3923867 |
Method for producing monomethyl terephthalate
A method for producing monomethyl terephthalate, including dissolving in p-xylene a polyvalent heavy metal salt catalyst for the oxidation of p-xylene to p-toluic acid, oxidizing the resulting...
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3914287 |
Method for the recovery of dimethyl terephthalate and intermediate products thereof
A method of recovering dimethyl terephthalate and the intermediate products thereof which comprises heating a starting distillation residue to 260° - 400°C. to form dimethyl terephthalate and the...
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3910986 |
Process for oxidizing beta-acyloxyethyl-toluates
Beta-acyloxyethyl-toluates are oxidized with molecular oxygen under conditions such that the water content of the oxidation mixture is maintained at a value below 6% by weight.
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3890374 |
Method for the preparation of monomethyl terephthalate or a mixture thereof with p-toluic acid
In the preparation of monomethyl terephthalate or a mixture thereof with p-toluic acid through liquid phase oxidation of methyl p-toluate or a mixture of methyl p-toluate with p-xylene with...
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3723516 |
PROCESS FOR THE PREPARATION OF POLYBASIC BENZENE CARBOXYLIC ACIDS
Production of aromatic compounds having a multiplicity of carboxy groups pendant therefrom by vapor phase air oxidation of alkyl and nitrile substituted aromatic compounds to first produce the...
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3644178 |
AROMATIC ESTER RECOVERY
In the recovery of aromatic esters, a product of improved color is obtained when heated in the presence of antimony trioxide.
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3551481 |
PROCESS FOR THE PRODUCTION OF TRIMELLITIC ACID AND TRIMELLITIC ACID ANHYDRIDE
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3546274 |
PROCESS FOR PREPARING ESTERS
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3539592 |
PRODUCTION OF OXYGEN-CONTAINING ORGANIC COMPOUNDS
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3474131 |
PREPARATION OF PRIMARY ALKYL ESTERS
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3393225 |
Preparation of glycol dicarboxylates
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3381030 |
Aliphatic carboxylic acid esters and unsaturated carboxylic acids by oxidative carbonylation of olefins
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3349119 |
Oxidative carbonylation of olefins in the presence of inorganic acid anhydrides
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3326966 |
Process for the preparation of methylterephthalic acid dimethyl- and trimellitic acid trimethyl esters
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3280173 |
Production of esters from aldehydes and alcohols in the presence of chlorine
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3277154 |
Production of naphthalene dicarboxylic acid esters by the oxidation and subsequent esterification of dimethylnaphthalene
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3277153 |
Process for the isolation of diphenyl carboxylic acid methyl esters
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3253017 |
Process for the production of esters of phthalic acids
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3248417 |
Production of dimethyl terephthalate and dimethyl isophthalate from an evaporation residue rich in dimethyl isophthalate
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3157691 |
Preparation of aromatic polycarboxylated compounds
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3060222 |
Production of dialkyl esters of iso-and/or terephthalic acid
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3047613 |
Continuous process for oxidation of alkyl benzenes
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3047612 |
Ester preparation by oxidation of hydrocarbons
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3047614 |
Condensate recovery in oxidation of alkyl benzenes
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3036117 |
Preparation of esters of aromatic acids
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2955989 |
Distillation of esters
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2954405 |
Autoxidation processes using metal phthalocyanines as catalysts
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2925425 |
Oxidation of phthalide and mixtures thereof to phthalic anhydride
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2894978 |
Process of producing esters of phthalic acids by oxidation of xylene and toluic acid ester mixtures
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2883421 |
Production of benzene dicarboxylic acids
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2880237 |
Process for production of aromatic polycarboxylic acids
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2879289 |
Oxidation of alkyl benzenes in the presence of alkanols
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2876257 |
Production of trimesic acid
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2864855 |
Aromatic carboxylic acids and derivatives and preparation thereof from peroxide polymers
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2858334 |
Preparation of phthalic acids
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2853514 |
Process for the preparation of aromatic carboxylic acids
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2851487 |
Production of phthalic acids
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2848486 |
4, 4'-(2, 2-butylidene) dibenzoic acid
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2839575 |
Oxidation of alkyl-substituted benzene carboxylic acids
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