Global Patent Index - EP 0453677 A1

EP 0453677 A1 19911030 - Depression of the flotation of silica or siliceous gangue in mineral flotation.

Title (en)

Depression of the flotation of silica or siliceous gangue in mineral flotation.

Title (de)

Drücken von Kieselsäure oder siliziumgehaltiger Gangart bei Erzflotation.

Title (fr)

Dépression de la silice ou d'une gangue siliceuse dans la flottation des minerais.

Publication

EP 0453677 A1 19911030 (EN)

Application

EP 90304633 A 19900427

Priority

  • EP 90304633 A 19900427
  • CA 2014882 A 19900419
  • ZA 903531 A 19900509
  • CN 90102733 A 19900511

Abstract (en)

A flotation process is disclosed wherein the selectivity to the valuable mineral is improved by the depression of silica or siliceous gangue by the use of a hydroxy-containing compound such as an alkanol amine. The process is useful in the flotation of oxide minerals as well as in sulfide flotation.

IPC 1-7

B03D 1/008; B03D 1/01; B03D 1/012

IPC 8 full level

B03D 1/008 (2006.01); B03D 1/01 (2006.01); B03D 1/012 (2006.01); B03D 1/02 (2006.01)

IPC 8 main group level

B03D (2006.01)

CPC (source: EP)

B03D 1/008 (2013.01); B03D 1/01 (2013.01); B03D 1/012 (2013.01); B03D 2201/02 (2013.01); B03D 2203/02 (2013.01); B03D 2203/025 (2013.01)

Citation (search report)

  • [X] US 4213942 A 19800722 - THORNTON EDWARD W J [CA]
  • [A] US 4220525 A 19800902 - PETROVICH VOJISLAV [US]
  • [A] GB 1456392 A 19761124 - ICI LTD
  • [A] US 2070076 A 19370209 - BROWN EARL H
  • [A] US 2019306 A 19351029 - HANDY ROYAL S
  • [A] US 4437983 A 19840320 - PETROVICH VOJISLAV [US]
  • [A] SOVIET INVENTIONS ILLUSTRATED, week B46, 2nd January 1980, no. 83749B/46, Derwent Publications Ltd, London, GB; & SU-A-649 469 (NON-FERRORE ENRICH) 08-02-1979
  • [A] SOVIET INVENTIONS ILLUSTRATED, week 8533, 26th September 1985, no. 85=201864/33, Derwent Publications Ltd, london, GB; & SU-A-1135 497 (BELORUSS KIROV TECHN. INS.) 23-01-1985
  • [A] SOVIET INVENTIONS ILLUSTRATED, week 8806, 11th February 1988, no. 88-041129/06, Derwent Publications Ltd, London, GB; & SU-A-1318 302 (LENINGRAD PLEKHANOV MINE) 23-06-1987
  • [A] SOVIET INVENTIONS ILLUSTRATED, week 84/27, 15th August 1984, no. 84-170196/27, Derwent Publications Ltd, London, GB; & SU-A-1050 751 (NOW-FERR METAL INST.) 30-10-1983
  • [A] SOVIET INVENTIONS ILLUSTRATED, week 8530, 5th September 1985, no. 85-182285/30, Derwent Publications Ltd, London, GB; & SU-A-1003 431 (KURKOV AV) 07-02-1985

Designated contracting state (EPC)

DE ES GB GR SE

DOCDB simple family (publication)

EP 0453677 A1 19911030; EP 0453677 B1 19950809; AU 5477490 A 19911107; AU 619979 B2 19920206; CA 2014882 A1 19911019; CA 2014882 C 19960220; CN 1056445 A 19911127; DE 69021553 D1 19950914; FR 2661844 A1 19911115; FR 2661844 B1 19931029; ZA 903531 B 19920129

DOCDB simple family (application)

EP 90304633 A 19900427; AU 5477490 A 19900507; CA 2014882 A 19900419; CN 90102733 A 19900511; DE 69021553 T 19900427; FR 9005770 A 19900509; ZA 903531 A 19900509