公开(公告)号：WO2019200590A1

公开(公告)日：2019-10-24

申请号：PCT/CN2018/083782

申请日：2018-04-19

Applicant: KEMIRA OYJ ,  KEMIRA (ASIA) CO., LTD.

Inventor： XU, Yan ,  LI, Fengyang

IPC: C02F9/10 ,  C02F5/04

Abstract: A composition for pretreating landfill leachate on mechanical vapor recompression (MVR) evaporation process by which Mg, Ca and ammonia are efficiently removed is provided. The composition comprises 0.2–2 weight-% of cationic polymer, 5–80 weight-% of sodium and/or potassium phosphate, 5–40 weight-% of saccharide, and 5–40 weight-% of sodium and/or potassium carbonate, calculated from the total weight of the constituents in the composition, as dry. A method for pretreating landfill leachate on MVR evaporation process is provided. The composition is added to the landfill leachate prior to conveying the landfill leachate to the evaporation system.

公开(公告)号：WO2020198982A1

公开(公告)日：2020-10-08

申请号：PCT/CN2019/080542

申请日：2019-03-29

Applicant: KEMIRA OYJ ,  KEMIRA (ASIA) CO., LTD.

Inventor： LI, Fengyang ,  XU, Yan

IPC: C02F5/14

Abstract: A typical dispersant comprises a copolymer of phosphono and carboxylic acid, at least 5-weight-% of a terpolymer consisting of (meth) acrylic acid and maleic acid monomers or their salts, at least 10 weight-% of acrylic acid-2-acrylamido-2-methylpropane sulfonic acid copolymer (AA/AMPS), and at least 5-weight-% of at least one monomeric or polymeric phosphonate comprising at least one phosphonic acid group, or its salt (s). Use of the dispersant and a method for controlling, preventing and/or reducing the formation inorganic scale and/or deposits in an aqueous system are provided.

公开(公告)号：WO2018040097A1

公开(公告)日：2018-03-08

申请号：PCT/CN2016/098065

申请日：2016-09-05

Applicant: KEMIRA OYJ ,  KEMIRA (ASIA) CO., LTD.

Inventor： LI, Fengyang ,  XU, Yan ,  XU, Kaiyi ,  XIAO, Lan

IPC: C02F5/14

CPC classification number: C02F5/14 ,  C02F1/683 ,  C02F2303/08

Abstract: Provided is a composition for controlling, preventing and/or reducing the formation of inorganic scale and/or deposits in an aqueous system. The composition comprises a copolymer of phosphinic acid and (meth) acrylic acid or its salt (s), a polycarboxylic acid or its salt (s), at least one monomeric phosphonate comprising phosphonic acid groups, at least one corrosion inhibitor comprising amine groups, and at least one chelating agent. Further disclosed is use of the composition in an aqueous system having water hardness as calcium carbonate in the range of 50–1500 ppm.

Abstract translation: 提供用于控制，防止和/或减少含水体系中无机垢和/或沉积物形成的组合物。 该组合物包含次膦酸和（甲基）丙烯酸或其盐的共聚物，多元羧酸或其盐，至少一种包含膦酸基团的单体膦酸酯，至少一种包含胺基的腐蚀抑制剂， 和至少一种螯合剂。 还公开了该组合物在具有50-1500ppm范围内的碳酸钙水硬度的含水体系中的用途。

公开(公告)号：WO2022193294A1

公开(公告)日：2022-09-22

申请号：PCT/CN2021/081833

申请日：2021-03-19

Applicant: KEMIRA OYJ ,  KEMIRA (ASIA) CO., LTD.

Inventor： XU, Yan ,  ZHANG, Darian

IPC: C02F1/62 ,  C02F1/5236 ,  C02F1/5272 ,  C02F1/56 ,  C02F2101/203 ,  C02F2101/206 ,  C02F2103/28

Abstract: The present invention relates to a method for removing at least one metal ion from an effluent or a process water from a pulp mill or a paper mill. The method comprises treating the effluent or the process water with at least one salt of organic acid and/or at least one salt of inorganic acid to precipitate the metal ion in form of metal salt of organic acid and/or metal salt of inorganic acid. The present invention additionally relates to a use of at least one salt of organic acid and/or at least one salt of inorganic acid for removing at least one metal ion from an effluent or a process water from a pulp mill or a paper mill.

公开(公告)号：WO2019165582A1

公开(公告)日：2019-09-06

申请号：PCT/CN2018/077461

申请日：2018-02-27

Applicant: KEMIRA OYJ ,  KEMIRA (ASIA) CO., LTD.

Inventor： LI, Fengyang ,  XU, Yan

IPC: C01G49/04 ,  C01G49/06 ,  C01G49/08 ,  C01G49/10 ,  C01G49/12 ,  C01G49/14 ,  C02F5/12 ,  C02F5/14

Abstract: Composition for stabilizing iron compounds in an aqueous environment, which comprises a polycarboxylic acid or its salt (s), at least one monomeric or polymeric phosphonate comprising at least one phosphonic acid group, or its salt (s), at least one corrosion inhibitor comprising amino groups, and 1 -15 weight-%of polycitric acid or a copolymer of citric acid with polyols or glycerol, calculated as active ingredient from the total weight of the constituents in the composition, as dry.

公开(公告)号：WO2022266813A1

公开(公告)日：2022-12-29

申请号：PCT/CN2021/101327

申请日：2021-06-21

Applicant: KEMIRA OYJ ,  KEMIRA (ASIA) CO. LTD.

Inventor： XU, Yan ,  XU, Kaiyi

IPC: D06M15/19 ,  D06M13/00 ,  D06M11/00

Abstract: What is dislcosed is a process for treating fibre material. The method comprises treating the fibre material in an aqueous medium with peroxide in presence of carboxyethylthiosuccinic acid. The process relates additionally to use of carboxyethylthiosuccinic acid as peroxide stabilizer.