EP 0621352 A3 19941207 - Process for manufacturing terephthalaldehydetetraalkylacetals.
Title (en)
Process for manufacturing terephthalaldehydetetraalkylacetals.
Title (de)
Verfahren zur Herstellung von Terephthalaldehydtetraalkylacetalen.
Title (fr)
Procédé de préparation de tétraalkylacétals de téréphtalaldéhyde.
Publication
Application
Priority
DE 4308846 A 19930319
Abstract (en)
[origin: EP0621352A2] Electrochemical preparation of terephthalaldehyde tetraalkyl acetals I <IMAGE> in which R is C1-C6-alkyl, by the process of compounds (II) or their mixtures, which are formed, in addition to I and p-tolylaldehyde dialkyl acetal (III), during the electrochemical oxidation of p-xylene in the presence of a neutral supporting electrolyte or an acid in alkanolic solution, after I and, if required, part of the oxidation products II and III have largely been separated, being subjected to further electrochemical oxidation.
IPC 1-7
IPC 8 full level
CPC (source: EP)
C25B 3/23 (2021.01)
Citation (search report)
- [Y] EP 0522312 A1 19930113 - BASF AG [DE]
- [Y] EP 0164705 A2 19851218 - BASF AG [DE]
- [A] F. BARBA: "Electrochemical Methoxylations of Side -Chain Methoxylated p-Xylene Derivatives", ELECTROCHIMICA ACTA, vol. 29, no. 12, 1984, OXFORD GB, pages 1639 - 11641, XP026551494, DOI: doi:10.1016/0013-4686(84)89003-9
Designated contracting state (EPC)
BE CH DE ES FR GB LI NL
DOCDB simple family (publication)
DE 4308846 A1 19940922; EP 0621352 A2 19941026; EP 0621352 A3 19941207
DOCDB simple family (application)
DE 4308846 A 19930319; EP 94103543 A 19940309