PROCESS FOR THE PREPARATION OF TOLUENE-DIISOCYANATE
    4.
    发明申请
    PROCESS FOR THE PREPARATION OF TOLUENE-DIISOCYANATE 失效
    过氧化二异氰酸酯的制备方法

    公开(公告)号:US20110021811A1

    公开(公告)日:2011-01-27

    申请号:US12894290

    申请日:2010-09-30

    IPC分类号: C07C263/10

    摘要: The present invention relates to a process for the preparation of toluene-diisocyanate. In this process, toluenediamine is reacted with phosgene to give crude toluene-diisocyanate, the crude toluene-diisocyanate is purified by distillation, the distillation residue formed during the distillation is hydrolysed at temperatures of less than 230° C. under absolute pressures of less than 30 bar, and the toluenediamine formed by this process is subsequently recycled into the reaction of toluenediamine and phosgene.

    摘要翻译: 本发明涉及一种制备甲苯二异氰酸酯的方法。 在该方法中,甲苯二胺与光气反应得到粗甲苯二异氰酸酯,通过蒸馏纯化粗甲苯二异氰酸酯,蒸馏期间形成的蒸馏残余物在小于230℃的温度下在绝对压力小于 30巴,通过该方法形成的甲苯二胺随后再循环到甲苯二胺和光气的反应中。

    Process for the preparation of toluene-diisocyanate
    5.
    发明申请
    Process for the preparation of toluene-diisocyanate 审中-公开
    制备甲苯二异氰酸酯的方法

    公开(公告)号:US20080146835A1

    公开(公告)日:2008-06-19

    申请号:US12001905

    申请日:2007-12-13

    IPC分类号: C07C263/10

    摘要: The present invention relates to a process for the preparation of toluene-diisocyanate. In this process, toluenediamine is reacted with phosgene to give crude toluene-diisocyanate, the crude toluene-diisocyanate is purified by distillation, the distillation residue formed during the distillation is hydrolysed at temperatures of less than 230° C. under absolute pressures of less than 30 bar, and the toluenediamine formed by this process is subsequently recycled into the reaction of toluenediamine and phosgene.

    摘要翻译: 本发明涉及一种制备甲苯二异氰酸酯的方法。 在该方法中,甲苯二胺与光气反应得到粗甲苯二异氰酸酯,通过蒸馏纯化粗甲苯二异氰酸酯,蒸馏期间形成的蒸馏残余物在小于230℃的温度下在绝对压力小于 30巴,通过该方法形成的甲苯二胺随后再循环到甲苯二胺和光气的反应中。

    Continuous process for preparing metal complex pigments
    6.
    发明授权
    Continuous process for preparing metal complex pigments 失效
    制备金属络合物颜料的连续工艺

    公开(公告)号:US06448385B2

    公开(公告)日:2002-09-10

    申请号:US09821888

    申请日:2001-03-30

    IPC分类号: C09B4514

    摘要: The invention relates to a process for preparing metal complexes of polyvalent metal ions with azo compounds of formula (I) or tautomeric structures, in which R and R′ are —OH, —NH2, —NH—CN, aryl-amino, acylamino, or p-chlorophenyl, and R1 and R1′ are independently —OH or —NH2, that intercalate an intercalate by (1) stirring an aqueous dispersion of an alkali metal salt of the azo compound with the polyvalent metal salt at 10 to 35° C., (2) admixing an aqueous solution, dispersion, or emulsion of the intercalate, (3) passing the mixture through a reaction zone at 85 to 140° C., while regulating the pH so that the product dispersion leaving the reaction zone has a pH of 0.5 to 3, (4) adjusting the pH of the mixture to at least pH 5, and (5) isolating the intercalated metal complex.

    摘要翻译: 本发明涉及一种制备多价金属离子金属络合物与式(I)的偶氮化合物或互变异构结构的方法,其中R和R'是-OH,-NH 2,-NH-CN,芳基 - 氨基,酰基氨基, 或对氯苯基,R1和R1'独立地为-OH或-NH2,其通过以下步骤插入插层:(1)在10至35℃下,将偶氮化合物的碱金属盐的水分散体与多价金属盐一起搅拌 (2)将嵌入物的水溶液,分散液或乳液混合,(3)在85-140℃下使混合物通过反应区,同时调节pH,使离开反应区的产物分散体具有 pH为0.5至3,(4)将混合物的pH调节至至少pH 5,和(5)分离插入的金属络合物。