Global Patent Index - EP 0980283 A1

EP 0980283 A1 2000-02-23 - METHOD FOR REDUCING METAL ION CONTENT IN A CHEMICAL COMPOUND WITH A DIPOLE MOMENT

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 (DE)

Application

EP 98925553 A

Priority

  • DE 19719720 A
  • EP 9802687 W

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 (main, further and additional classification)

B01D 1/00

IPC 8 full level (invention and additional information)

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

CPC (invention and additional information)

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

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

EPO simple patent family

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

INPADOC legal status


2007-01-31 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20060718

2005-01-12 [RAP1] TRANSFER OF RIGHTS OF AN EP PUBLISHED APPLICATION

- Owner name: HONEYWELL SPECIALTY CHEMICALS SEELZE GMBH

2001-10-04 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010821

2000-02-23 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991130

2000-02-23 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB IE IT LI NL SE