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7217840 |
Method for preparing 1,3,5-triaminobenzene and hydrolyzing it into high-purity phloroglucinal
The invention concerns a method for method for preparing 1,3,5-triaminobenzene, characterized in that it comprises a step which consists in amination of a compound of formula (I), wherein: A...
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7087799 |
Amino group containing phenol derivative
An object of the present invention is to provide a material which resolves the drawbacks associated with polyimide polymers, and yet retains the advantages offered by conventional polyimide...
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6737236 |
Bioconjugation of macromolecules
This invention discloses a novel method for conjugating macromolecules to other molecular entities. Specifically, this invention discloses a method for conjugating or derivatizing macromolecules,...
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6531637 |
Resorcinol production from the hydrolysis of meta-phenylenediamine
A process for the preparation of resorcinol using the meta-phenylenediamine hydrolysis reaction is provided. A reactor vessel made of a suitable material such as zirconium or a zirconium alloy is...
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5216042 |
Process for preparing viscosity-stabilized reactive toluene diisocyanate distillation residues and blends thereof
A method of preparing viscosity-stabilized toluene diisocyanate distillation residues comprising contacting toluene diisocyanate distillation residue with a material suitable for purging...
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4982013 |
Preparation of polyhydroxybenzenes by direct hydroxylation of phenols
Polyhydroxybenzenes, e.g., the dihydroxybenzenes, are prepared by directly hydroxylating a phenol with nitrous oxide, preferably in vapor phase, on a substrate of acidified zeolite particulates,...
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4980505 |
Organic synthesis
The conversion of ortho-hydroxylated Mannich bases to the corresponding methylated compounds, e.g., cresols, can be effectively carried out using a novel hydrogenation technique.
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4300001 |
Desensitized TNT; its preparation and use
The explosive 2,4,6-trinitrotoluene (TNT) is desensitized by dissolving it in oleum of from 10 to 40% (by weight) in strength. The solutions formed preferably contain at least 400 g and at most 480...
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4290975 |
N-Sulfonyl amine-mediated sulfamation of amines
Primary amines are selectively sulfamated by the two-step process of: A. Contacting the amine in liquid phase at low to moderate temperatures with catechol sulfate thereby forming a catechol...
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4275247 |
Process for preparing an organic compound
Pyrogallol or a salt thereof is prepared by a process comprising deoximating cyclohexane-1,2,3-trione oxime or an oxime derivative thereof or a salt of either. Preferably the oxime itself is...
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4270010 |
Hydroquinone by hydrolysis of p-aminophenol or salts
Hydroquinone is made by heating an aqueous solution of p-aminophenol, or of a salt of p-aminophenol with an acid made by catalytic or electrolytic reduction of nitrobenzene, with an organic...
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4118591 |
3,7-Inter-m-phenylene-4,5,6-trinor-PGD.sub.1 compounds
Prostaglandin analogs with the following cyclopentane ring structure: ##STR1## are disclosed along with intermediates useful in their preparation and processes for their preparation. These analogs...
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4118586 |
Process for preparing dihydroxytoluene
A process for preparing dihydroxytoluene by heating toluene diisocyanate distillation residue in the presence of an aqueous solution of phosphoric acid.
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4072721 |
Purification of hydroquinone
There is disclosed the method of preparing photographic grade hydroquinone from technical grade hydroquinone which consists of treating a solution of the technical grade hydroquinone in the...
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3937741 |
Production of hydroquinone
Hydroquinone is made by electrolytically reducing nitrobenzene in an aqueous acid medium and thereafter maintaining the reaction medium containing the amino product, at a temperature of 200° to...
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3933925 |
Hydrolysis of toluene diamines to produce methyl resorcinols
Methyl resorcinols are produced by the hydrolysis of toluene diamines in an aqueous excess of ammonium bisulfate. The reactants are contacted at an elevated temperature for a period of time...
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3932538 |
Process for producing pyrogallol and derivatives thereof
A process for producing pyrogallol or 5-substituted pyrogallol having the formula: ##SPC1## Wherein R is selected from the group consisting of alkyl, cycloalkyl, aryl, and aralkyl, or a mixture...
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3862247 |
HYDROLYSIS OF PARA-AMINOPHENOL
Hydroquinone is produced by hydrolizing p-aminophenol in an aqueous solution of ammonium bisulfate. The product hydroquinone is separated from the by-product ammonium sulfate and the by-product...
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3862246 |
HYDROLYSIS OF META-PHENYLENEDIAMINE
Resorcinol is produced by the hydrolysis of meta-phenylenediamine in an aqueous excess of ammonium bisulfate. The reactants are contacted at an elevated temperature for a period of time sufficient...
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3862245 |
RESORCINOL PREPARATION
Resorcinol is made by hydrogenating dinitrobenzene in an aromatic mono-nuclear hydrocarbon-lower alcohol mixed solvent system in the presence of a nickel catalyst at moderate temperatures and...
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3683034 |
PROCESS FOR THE PREPARATION OF SUBSTITUTED HYDROQUINONES
A novel process is disclosed for preparing substituted hydroquinone of the formula: ##SPC1## Wherein R is member selected from the group consisting of lower-alkyl, aryl, and lower alkoxy and m is...
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3462497 |
RESORCINOL MANUFACTURE
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3256336 |
Cleavage of alkyl o-hydroxyphenyl ethers
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3230266 |
Preparation of phloroglucinol
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3717683 |
Title is not available
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3654366 |
Title is not available
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