Global Patent Index - EP 1025908 A1

EP 1025908 A1 2000-08-09 - Biodegradable quaternary esters used as flotation agents

Title (en)

Biodegradable quaternary esters used as flotation agents

Title (de)

Biologisch abbaubare Esterquats als Flotationshilfsmittel

Title (fr)

Esters quaternaires biodégradables utilisés comme agents de flottation

Publication

EP 1025908 A1 (DE)

Application

EP 00107539 A

Priority

  • DE 19602856 A
  • EP 97901048 A

Abstract (en)

The flotation process for removing mineral impurities, especially silicates, from ores comprises passing air through an aqueous suspension of the ground ore in the presence of a flotation aid and separating off the foam plus the impurities. The collector components used in the flotation aid comprise quaternised ester compounds (esterquats) of formula (I), (II) and/or (III), optionally with other anionic, cationic, amphoteric and/or non-ionic substances. In the formulae: R1CO, R5CO and R9CO = 6-24C acyl; R2, R3, R6 and R10 = H or 6-24C acyl; R4 = 1-4C alkyl or -(CH2CH2O)qH, where q = 1-12; R7, R8, R11, R12 and R13 = 1-4C alkyl; (m + n + p) or (m + n) = 0 or 1-12; and X = halide, alkylsulphate or alkylphosphate.

Abstract (de)

Die Erfindung betrifft die Verwendung sogenannter Esterquats als Hilfsmittel bei der Flotation nichtsulfidischer Erze. Es wurde gefunden, daß die als Esterquats bezeichneten, quaternisierten Veresterungsprodukte der Mono-, Di- oder Trialkanolamine mit aliphatischen Carbonsäuren einerseits gute Sammlereigenschaften zeigen, insbesondere bei der Silikatflotation, andererseits sowohl unter aeroben wie auch unter anaeroben Bedingungen hervorragende biologische Abbaubarkeit gewährleisten.

IPC 1-7 (main, further and additional classification)

B03D 1/01

IPC 8 full level (invention and additional information)

B01F 17/18 (2006.01); B03D 1/01 (2006.01)

CPC (invention and additional information)

B03D 1/0043 (2013.01); B03D 1/008 (2013.01); B03D 1/011 (2013.01); B03D 2201/02 (2013.01); B03D 2203/04 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT DE ES FI FR GB GR IE IT NL SE

EPO simple patent family

DE 19602856 A1 19970731; AT 215404 T 20020415; AT 274377 T 20040915; AU 1443197 A 19970820; AU 708335 B2 19990805; BR 9707082 A 19990413; EP 0876222 A1 19981111; EP 0876222 B1 20040825; EP 1025908 A1 20000809; EP 1025908 B1 20020403; ES 2174784 T3 20021116; ES 2227665 T3 20050401; MX 9805334 A 19981031; WO 9726995 A1 19970731; ZA 9700573 B 19970728

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