Title (en)

METHOD FOR REDUCING METAL ION CONTENT IN A CHEMICAL COMPOUND WITH A DIPOLE MOMENT

Title (de)

VERFAHREN ZUR VERRINGERUNG DES METALLIONENGEHALTES IN EINER CHEMISCHEN VERBINDUNG MIT DIPOLMOMENT

Title (fr)

PROCEDE POUR REDUIRE LA TENEUR EN IONS METALLIQUES DANS UN COMPOSE CHIMIQUE A MOMENT DIPOLAIRE

Publication

EP 0980283 A1 20000223 (DE)

Application

EP 98925553 A 19980507

Priority

• DE 19719720 A 19970509
• EP 9802687 W 19980507

Abstract (en)

[origin: DE19719720A1] The invention relates to a method for reducing the metal ion content in a chemical compound with a dipole moment or a mixture of two or more thereof with 1 ppb or less by distillation and by supplying the energy required for evaporating the chemical compound or the mixture of two or more thereof in the form of electromagnetic waves with a frequency ranging from 1 MHz to 50 GHz.

IPC 1-7

B01D 1/00

IPC 8 full level

C01B 7/07 (2006.01); C01B 7/19 (2006.01)

CPC (source: EP US)

C01B 7/0712 (2013.01 - EP US); C01B 7/196 (2013.01 - EP US); Y02C 20/30 (2013.01 - US)

Citation (search report)

See references of WO 9851388A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB IE IT LI NL SE

DOCDB simple family (publication)

DE 19719720 A1 19981112; AU 7762598 A 19981208; CA 2290015 A1 19981119; EP 0980283 A1 20000223; TW 396054 B 20000701; US 6432277 B1 20020813; WO 9851388 A1 19981119

DOCDB simple family (application)

DE 19719720 A 19970509; AU 7762598 A 19980507; CA 2290015 A 19980507; EP 9802687 W 19980507; EP 98925553 A 19980507; TW 87107228 A 19980511; US 42358300 A 20000815