Basf Se Corporation

Alexsandro Berger

Christian Bittner

Günter Oetter

Guenter Oetter

Joerg Nieberle

Roland Boehn

Roland Bohn

Jorg Nieberle

Bernhard Ulrich Von Vacano

Bernhard Ulrich Vacano

Matthias Laubender

Konrad Roschmann

Bolette Urtel

Marc Schroeder

Frank Klippel

Guido Vandermeulen

Stephen John Adkins

Bernhard Von Vacano

Stephan Amthor

Andrew Nisbett

Ewald Heintz

Roland Böhn

Ian John Flanagan

Clarissa Seidl

Jörg Nieberle

Clarissa Gieger

The present invention relates to a metal leach and recovery process. The process involves subjecting a metal bearing material to a reactive process by combining said metal bearing material with a leaching agent to liberate at least one metal value and forming a first aqueous leach pulp. This first aqueous leach pulp is subjected to a solid liquid separation step thereby providing a first clarified aqueous leach solution and a second aqueous leach pulp. The first clarified aqueous leach solution is then subjected to solvent extraction thereby obtaining the first aqueous raffinate. The second aqueous leach pulp is subjected to at least two further solid liquid separation steps of which some or all are in a counter current decantation (CCD) arrangement. Each of the solid liquid separation steps of the CCD arrangement results in an aqueous liquor and aqueous suspension of solids wherein each aqueous suspension of solids resulting from each solid liquid separation step of the CCD arrangement is passed to the subsequent solid liquid separation step and the suspension of solids resulting from the final solid liquid separation step is removed from the process. Further, each aqueous liquor resulting from each solid liquid separation step of the CCD arrangement is passed to the previous solid liquid separation step. The further solid liquid separation steps result in at least one further clarified aqueous leach solution. The at least one further clarified aqueous leach solution is/are subjected to solvent extraction thereby obtaining at least one further aqueous raffinate. At least a portion of the one or more of the at least one further aqueous raffinates is fed into the final solid liquid separation is of the CCD arrangement. The process provides a flocculation system comprising either: (i) addition of an organic polymeric flocculant to or prior to at least one solid liquid separation step, which polymeric flocculant is formed from 2-acrylamido-2-methylpropane sulphonic acid (ATBS) or salts thereof as a homopolymer or copolymer with at least one water-soluble ethylenically unsaturated monomer; or (ii) addition of an organic polymeric flocculant and at least one support agent to or prior to at least one solid liquid separation step, which at least one support agent is selected from at least one of the group consisting of oxidizing agents, reducing agents, irradiation and free radical producing agents. The process provides significantly improved metal extraction and recovery.

Metal leach and recovery process

The invention relates to a process for enriching an iron mineral from a silicate containing iron ore by inverse flotation comprising the addition of a collector or collector composition comprising at least one of the compounds of formulae RO&#x2014;X&#x2014;NH(Ia); RO&#x2014;X&#x2014;NHY(Ib); RO&#x2014;X&#x2014;NH&#x2014;Z&#x2014;NH(IIa); and RO&#x2014;X&#x2014;NH&#x2014;Z&#x2014;NHY(IIb), in which X is a linear or branched aliphatic alkylene group containing 2 to 6 carbon atoms; Z is a linear or branched aliphatic alkylene group containing 2 to 6 carbon atoms; Y&#x2212; is an anion; and R is an aliphatic group of the formula (I) CHCH(CH)CH&#x2014; (I) wherein the CHmoeity of the aliphatic group of the formula (I) comprises 70 to 99% by weight n-CH&#x2014;, and 1 to 30% by weight CHCH(CH)CH&#x2014; and/or CHCH(CH)CHCH&#x2014;.RO&#x2014;X&#x2014;NH&#x2003;&#x2003;(Ia)RO&#x2014;X&#x2014;NHY&#x2003;&#x2003;(Ib)RO&#x2014;X&#x2014;NH&#x2014;Z&#x2014;NH&#x2003;&#x2003;(IIa)RO&#x2014;X&#x2014;NH&#x2014;Z&#x2014;NHY&#x2003;&#x2003;(IIb)CHCH(CH)CH&#x2014;&#x2003;&#x2003;(I)

Amine and diamine compounds and their use for inverse froth flotation of silicate from iron ore

Compounds of the formulae: RO&#x2014;X&#x2014;NH(Ia); RO&#x2014;X&#x2014;NHY(Ib); RO&#x2014;X&#x2014;NH&#x2014;Z&#x2014;NH(IIa); and RO&#x2014;X&#x2014;NH&#x2014;Z&#x2014;NHY(IIb), in which X is an aliphatic alkylene group containing 2 to 6 carbon atoms; Z is an aliphatic alkylene group containing 2 to 6 carbon atoms; Yis an anion; and R is an aliphatic iso CH-group with average branching degree ranging from 1.5 to 3.5. The compounds are particularly suitable as flotation collectors for enriching an iron mineral from a silicate-containing iron ore.

The invention concerns a process for enriching an iron mineral from a silicate containing iron ore by inverse flotation comprising the addition of a collector or collector composition comprising at least one of the compounds of formulae RC(O)N(Z&#x2014;O&#x2014;X&#x2014;NH)(Ia); RC(O)N(Z&#x2014;O&#x2014;X&#x2014;NH)HY(Ib); in which X is an aliphatic alkylene group containing 2 to 6 carbon atoms; Z is an aliphatic alkylene group containing 2 to 6 carbon atoms; Yis an anion; and R is a saturated or unsaturated, linear or branched, aliphatic or aromatic moiety having between 7 and 23 carbon atoms. The invention also relates to the novel compounds according to formulae (Ia) and (Ib), compositions comprising said compounds and the use of compounds and formulations as collectors for enriching of iron mineral.

Diamine compounds and their use for inverse froth flotation of silicate from iron ore

The invention relates to a process for preparing a polymer by free-radical polymerization of at least one ethylenically unsaturated monocarboxylic acid and/or a salt thereof, at least one ethylenically unsaturated dicarboxylic acid and/or an anhydride and/or a salt thereof, in the presence of hypophosphorous acid and/or a salt thereof. The invention also relates to a polymer composition obtainable by this process. The invention also relates to the use of such a polymer composition as detergent additive, e.g. as dispersant, scale inhibitor or sequestrant for laundry detergents.

Copolymers of monocarboxylic acids and dicarboxylic acids, their preparation and use

The present invention relates to a method of applying atmospheric corrosion control coats to metallic surfaces, using copolymers comprising as monomeric building blocks monomers containing nitrile groups, monomers containing acidic groups, and vinylaromatic monomers. It relates, furthermore, to preparations for applying corrosion control coats.

Method for applying corrosion protection coatings to metal surfaces

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Rosenheim, Germany

Alexsandro Berger