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    • 7. 发明申请
    • FLUOROPOLYMER POWDER AND PROCESS FOR PREPARING THE SAME
    • 氟聚合物粉末及其制备方法
    • WO1997040089A1
    • 1997-10-30
    • PCT/JP1997001393
    • 1997-04-23
    • DAIKIN INDUSTRIES LTD.TOMIHASHI, NobuyukiMIYATANI, Toshio
    • DAIKIN INDUSTRIES LTD.
    • C08J03/12
    • C08J3/12C08J2327/12
    • A process for preparing a fluoropolymer powder characterized by densifying a fluoropolymer as a raw powder by means of rolls under such conditions as to give a specific gravity of at least 90 % of the true specific gravity, pulverizing the densified powder, removing fine particles in an amount of 3 to 40 % by weight of the whole particle size distribution of the pulverized product by air classification, and removing coarse particles in an amount of 1 to 20 % by weight of the whole particle size distribution of the pulverized product. The fluoropolymer powder prepared by the above process has a good producibility and a good powder fluidity and can be used as a powder coating which causes no contamination when thermally fused.
    • 一种制备含氟聚合物粉末的方法,其特征在于,在使比重至少为真比重的至少90%的条件下通过辊致密化作为原料粉末的含氟聚合物,粉碎致密粉末,除去细粉末 粉碎产物的整体粒度分布的3〜40重量%,除去粉碎物的整体粒径分布的1〜20重量%的粗粒子。 通过上述方法制备的含氟聚合物粉末具有良好的生产能力和良好的粉末流动性,并且可以用作当热熔融时不引起污染的粉末涂料。
    • 10. 发明申请
    • PROCESS FOR PREPARING 1,1,1,3,3-PENTAFLUOROPROPANE
    • 制备1,1,1,3,3-戊二醇的方法
    • WO1996026914A1
    • 1996-09-06
    • PCT/JP1996000273
    • 1996-02-08
    • DAIKIN INDUSTRIES LTD.AOYAMA, HirokazuSHIBATA, NoriakiYAMAMOTO, Akinori
    • DAIKIN INDUSTRIES LTD.
    • C07C19/08
    • C07C19/08C07C17/23
    • A process for preparing 1,1,1,3,3-pentafluoropropane comprising the step (A) of reducing 2,3-dichloro-1,1,1,3,3-pentafluoropropane with hydrogen in the presence of a hydrogenation catalyst under an atmospheric or elevated pressure by a vapor-phase reaction, the step (B) of introducing all of the products of the step (A) into a condenser to obtain a non-condensed component comprising hydrogen and hydrogen chloride and a condensed component comprising 1,1,1,3,3-pentafluoropropane or a non-condensed component comprising hydrogen and a condensed component comprising hydrogen chloride and 1,1,1,3,3-pentafluoropropane, the step (C) of separating hydrogen from the non-condensed component of the step (B) and recycling the hydrogen to the above step (A), and the step (D) of separating 1,1,1,3,3-pentafluoropropane from the condensed component of the step (B). This process makes it possible to prepare 1,1,1,3,3-pentafluoropropane industrially efficiently and economically.
    • 一种制备1,1,1,3,3-五氟丙烷的方法,包括在氢化催化剂存在下用氢还原2,3-二氯-1,1,1,3,3-五氟丙烷的步骤(A) 通过气相反应的大气压或升高的压力,将步骤(A)的所有产物引入冷凝器的步骤(B),以获得包含氢和氯化氢的未冷凝组分和包含1 ,1,1,3,3-五氟丙烷或包含氢的冷凝组分和包含氯化氢和1,1,1,3,3-五氟丙烷的缩合组分的步骤(C) 步骤(B)的冷凝组分并将氢气再循环到上述步骤(A),以及从步骤(B)的冷凝组分分离1,1,1,3,3-五氟丙烷的步骤(D)。 该方法可以在工业上有效和经济地制备1,1,1,3,3-五氟丙烷成为可能。