GYPSUM SCALE INHIBITORS FOR ORE SLURRY SYSTEMS IN HYDRO METALLURGICAL APPLICATIONS
    33.
    发明申请
    GYPSUM SCALE INHIBITORS FOR ORE SLURRY SYSTEMS IN HYDRO METALLURGICAL APPLICATIONS 审中-公开
    水泥冶金应用中矿浆系统的GYPSUM规模抑制剂

    公开(公告)号:WO2015057489A1

    公开(公告)日:2015-04-23

    申请号:PCT/US2014/059890

    申请日:2014-10-09

    CPC classification number: C09K8/52 C22B3/02 C23F14/02 Y02P10/234

    Abstract: The current technology relates to mining processes and compositions which inhibit the growth of complex scale. More specifically it relates to a process for preventing/inhibiting and/or controlling gypsum scale in aqueous mineral ore slurries, and for inhibiting scale in relatively high solids content environments in industrial mining operations.

    Abstract translation: 目前的技术涉及抑制复杂规模增长的采矿工艺和组合物。 更具体地说,本发明涉及用于在矿物矿物浆料中预防/ /控制和/或控制石膏垢的方法,并且涉及在工业采矿作业中抑制较高固含量环境中的垢。

    STABILISERS FOR USE IN INVERSE EMULSION POLYMERISATION PROCESSES

    公开(公告)号:WO2020120323A1

    公开(公告)日:2020-06-18

    申请号:PCT/EP2019/084013

    申请日:2019-12-06

    Abstract: The present invention is directed to the use of a quaternized derivative of polyisobutylene as stabiliser in inverse emulsions like inverse emulsions used for a reverse-phase emulsion polymerisation process, e.g. for the polymerisation of acrylamide and ethylenically unsaturated cationic monomers. Such emulsions are e.g. used as flocculant for waste water treatment. The present invention is further directed to inverse emulsions comprising a quaternized derivative of polyisobutylene. The inverse emulsions have sufficiently low viscosity and sufficiently high shear stability. The present invention is further directed to an inverse emulsion polymerisation process, wherein the inverse emulsion comprises a quaternized derivative of polyisobutylene.

    METHOD FOR THE HYDROLYSIS OF A POLYMER
    40.
    发明申请

    公开(公告)号:WO2020053393A1

    公开(公告)日:2020-03-19

    申请号:PCT/EP2019/074503

    申请日:2019-09-13

    Abstract: The invention relates to a method for producing final polymer A containing the steps (A) providing a starting polymer V, the starting polymer V being obtainable by radical polymerization of the monomers (i) 25 to 90 mol% of a monomer of the formula (I) in which R 1 denotes H or C 1 -C 6 alkyl, (ii) 3 to 65 mol% of a C 1 -C 4 alkyl ester of acrylic acid or of a C 1 -C 4 alkyl ester of methacrylic acid, (iii) 1 to 45 mol% of a monoethylenically unsaturated carboxylic acid, a monoethylenically unsaturated sulfonic acid or a monoethylenically unsaturated phosphonic acid, or salt forms thereof, (iv) 0 to 35 mol% of one or more ethylenically unsaturated monomers which are different from a monomer (i), (ii) and (iii), wherein the total amount of all monomers (i), (ii), (iii) and (iv) is 100 mol%, and (B) hydrolyzing the provided starting polymer V under alkaline conditions to obtain the final polymer A, wherein the N-C(=O)R 1 groups of formula (I) at least partially hydrolyze the monomers (i) polymerized into the starting polymer V to form primary amino groups. Certain final polymers A obtained are useful for a method for producing paper or cardboard comprising adding certain final polymers A to a first aqueous pulp suspension, dewatering the obtained second aqueous pulp suspension containing certain final polymers A on a water-permeable substrate to a wet paper structure, and further dewatering of the wet paper structure into a paper or cardboard. The resulting paper or cardboard has good dry strength.

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