METHOD FOR PREPARING DIMETHYL-1,5-NAPHTHALENE DICARBOXYLATE

FIELD: organic chemistry, chemical technology. ^ SUBSTANCE: invention relates to the improved method for preparing dimethyl-1,5-naphthalene dicarboxylate that is used in preparing polymers based on thereof and articles made of these polymers. The economic and effective method involves the following...

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Hauptverfasser:	VEJS DZHON M, KHOLZKHAUEHR JURGEN K, LEHNG LOURENS L, BREHMLET DZHON S, PASHKE EHDVARD E, LILLVITTS LOURENS D, ROZEN BRJUS I, MEHKEK DZHON A, VISVANATKH ENAMANDRA, SAKELLARIDES STEFANOS L, SHNAJDER DEHVID DZH
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMISTRY COMPOSITIONS BASED THEREON GENERAL METHODS OF ORGANIC CHEMISTRY MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC CHEMISTRY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	FIELD: organic chemistry, chemical technology. ^ SUBSTANCE: invention relates to the improved method for preparing dimethyl-1,5-naphthalene dicarboxylate that is used in preparing polymers based on thereof and articles made of these polymers. The economic and effective method involves the following stages: (1) dehydrogenation of 1,5-dimethyltetraline to yield 1,5-dimethylnaphthalene; (2) oxidation of 1,5-dimethylnaphthalene prepared at dehydrogenation stage to yield 1,5-naphthalene dicarboxylic acid being without accompanying isomerization stage, and (3) esterification of 1,5-naphthalene dicarboxylic acid prepared at oxidation stage in the presence of methanol to yield the final dimethyl-1,5-naphthalene dicarboxylate. ^ EFFECT: improved preparing method. ^ 9 cl, 3 dwg, 5 ex