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    • 25. 发明授权
    • Metal-compound catalyzed processes
    • 金属化合物催化工艺
    • US06984668B1
    • 2006-01-10
    • US10048595
    • 2000-08-02
    • Graham Ronald EasthamRaymond Anthony HaddenDavid William Johnson
    • Graham Ronald EasthamRaymond Anthony HaddenDavid William Johnson
    • B01F17/00B01F3/08C09K3/00C07C67/38C07C51/14
    • B01J35/0013B01J31/28C07C67/38C07C69/24
    • A liquid-phase chemical reaction medium comprises one or more reactants, optionally in the presence of a reaction product(s) and one or more solvents, diluents or other form of liquid carrier, a catalyst system comprising at least a metal or metal compound and optionally further compounds such as ligands or complexing agents; characterized in that the reaction medium further comprises a polymeric dispersant dissolved in said liquid carrier, said polymeric dispersant being capable of stabilizing a colloidal suspension of particles of said metal or metal compound within the liquid carrier. The presence of the polymeric dispersant enables metal formed by catalyst deactivation to be more easily recovered and recycled. Preferably, the polymeric dispersant has sufficiently acidic or basic functionality to stabilize the colloidal suspension of said metal or metal compound.
    • 液相化学反应介质包括一种或多种反应物,任选地在反应产物和一种或多种溶剂,稀释剂或其它形式的液体载体存在下,至少包含金属或金属化合物的催化剂体系和 任选的其它化合物如配体或络合剂; 其特征在于所述反应介质还包含溶解在所述液体载体中的聚合物分散剂,所述聚合物分散剂能够稳定所述金属或金属化合物颗粒在胶体载体内的胶体悬浮液。 聚合物分散剂的存在使得通过催化剂失活形成的金属更容易回收和再循环。 优选地,聚合物分散剂具有足够的酸性或碱性官能度以稳定所述金属或金属化合物的胶体悬浮液。
    • 26. 发明授权
    • Thermal reduction of fluoroether carboxylic acids or salts from fluoropolymer dispersions
    • 含氟聚合物分散体中氟醚羧酸或盐的热还原
    • US08329813B2
    • 2012-12-11
    • US12774030
    • 2010-05-05
    • David William JohnsonKenneth Scott Teter
    • David William JohnsonKenneth Scott Teter
    • C08L27/12
    • C08F6/16C08F14/18C08L27/12C08F2/20C08F2/16
    • A process for reducing the fluoroether carboxylic acid or salt content of aqueous fluoropolymer dispersion. The fluoroether carboxylic acid or salt employed comprises fluoroether carboxylic acid or salt having the formula below: [R1—O-L-COO−]Y+ wherein R1 is a linear, branched or cyclic partially or fully fluorinated aliphatic group which may contain ether linkages; L is a branched partially or fully fluorinated alkylene group which may contain ether linkages; and Y+ is hydrogen, ammonium or alkali metal cation. The process comprises adding stabilizer to the aqueous fluoropolymer dispersion to form a stabilized aqueous fluoropolymer dispersion and heating the stabilized aqueous fluoropolymer dispersion to decarboxylate the fluoroether carboxylic acid or salt to produce a fluoroether byproduct. At least a portion of the fluoroether byproduct is removed.
    • 降低氟代醚羧酸含量或含氟聚合物含水分散体的盐含量的方法。 所用的氟醚羧酸或其盐包括具有下式的氟醚羧酸或盐:[R 1 -O-L-COO-] Y +,其中R 1是可以含有醚键的直链,支链或环状的部分或完全氟化的脂族基团; L是可以含有醚键的支化部分或完全氟化的亚烷基; Y +是氢,铵或碱金属阳离子。 该方法包括向含氟聚合物含水分散体中加入稳定剂以形成稳定的含氟聚合物含水分散体,并加热稳定的含氟聚合物水分散体以使氟代醚羧酸或盐脱羧以产生氟醚副产物。 除去至少一部分氟醚副产物。