Preparation of polyvinylpyrrolidone-iodine
    1.
    发明授权
    Preparation of polyvinylpyrrolidone-iodine 失效
    聚乙烯吡咯烷酮碘的制备

    公开(公告)号:US4200710A

    公开(公告)日:1980-04-29

    申请号:US30900

    申请日:1979-04-17

    CPC分类号: A01N59/12 C08F8/22

    摘要: A process for the preparation of PVP-iodine by reacting polyvinylpyrrolidone powder with elementary iodine at from 70.degree. to 100.degree. C. The reaction is carried out in the presence of formic acid, oxalic acid or an ammonium salt or amide of carbonic acid, formic acid or oxalic acid. The process avoids the disadvantage of long periods of heating, which can result in degradation of the polyvinylpyrrolidone, and is particularly suitable for the preparation of a stable PVP-iodine using a low molecular weight polyvinylpyrrolidone.

    摘要翻译: 一种通过使聚乙烯吡咯烷酮粉末与元素碘在70℃至100℃下反应制备PVP-碘的方法。反应在甲酸,草酸或碳酸的铵盐或酰胺存在下进行,甲酸 酸或草酸。 该方法避免长时间加热的缺点,这可能导致聚乙烯吡咯烷酮的降解,并且特别适用于使用低分子量聚乙烯吡咯烷酮制备稳定的PVP-碘。

    Manufacture of polyvinylpyrrolidone-iodine
    3.
    发明授权
    Manufacture of polyvinylpyrrolidone-iodine 失效
    聚乙烯吡咯烷酮碘的制造

    公开(公告)号:US4027083A

    公开(公告)日:1977-05-31

    申请号:US602772

    申请日:1975-08-07

    CPC分类号: C08F126/10

    摘要: Polyvinylpyrrolidone-iodine, manufactured by reaction of iodine and a polyvinylpyrrolidone obtained by polymerization in an anhydrous organic solvent in the presence of a source of free radicals and optionally in the presence of a heavy metal of atomic number from 23 to 29, in the form of a complex compound or of a salt with an organic acid, as a co-activator, followed by steam distillation of this polyvinylpyrrolidone, if appropriate. The PVP-iodine of the invention is very stable and can be used as a disinfectant.

    摘要翻译: 聚乙烯吡咯烷酮碘,通过碘和聚乙烯吡咯烷酮的反应制得,该聚乙烯吡咯烷酮通过在无水有机溶剂中,在自由基源的存在下,任选在23〜29的原子序数的重金属的存在下,以 络合物或与有机酸形成的盐作为共活化剂,然后蒸气蒸馏该聚乙烯吡咯烷酮。 本发明的PVP-碘非常稳定,可用作消毒剂。

    Preparation of carboxylic chlorides
    6.
    发明授权
    Preparation of carboxylic chlorides 失效
    羧酸氯化物的制备

    公开(公告)号:US5200560A

    公开(公告)日:1993-04-06

    申请号:US908439

    申请日:1992-06-30

    IPC分类号: C07C51/60

    CPC分类号: C07C51/60

    摘要: A process for the preparation of a carboxylic chloride of the general formula I ##STR1## in which R denotes C.sub.1 -C.sub.30 -alkyl, C.sub.2 -C.sub.30 -alkenyl or C.sub.2 -C.sub.30 -alkynyl, from a carboxylic acid of the general formula II ##STR2## in which R has the meanings stated, and phosgene COCl.sub.2 (III), in the presence of a catalyst adduct comprising phosgene and N,N-disubstituted formamide of the general formula IV ##STR3## in which R.sup.1 and R.sup.2 are independently C.sub.1 -C.sub.3 -alkyl or R.sup.1 and R.sup.2 together form a C.sub.4 - or C.sub.5 -alkylene chain which may or may not be interrupted by an oxygen atom or by a nitrogen atom carrying a C.sub.1 -C.sub.3 -alkyl group or CHO, the product being isolated by phase separation, wherein the amount of phosgene added to the formamide (IV) is from 20 to 70% molar, based on the formamide.

    摘要翻译: 由通式I(I)表示的羧酸的制备方法,其中R表示C 1 -C 30 - 烷基,C 2 -C 30 - 烯基或C 2 -C 30炔基,由通式 (II)其中R具有所述的含义,和光气COCl 2(III),在包含光气和N,N-二取代的通式IV(IV)的甲酰胺的催化剂加合物的存在下,在 其中R 1和R 2独立地是C 1 -C 3 - 烷基或R 1和R 2一起形成C4-或C5-亚烷基链,其可以被氧原子或可以不被氧原子中断或可以被携带C1-C3-烷基的氮原子或 CHO,通过相分离分离产物,其中加甲酰胺(IV)中的光气的量为甲酰胺为20-70%摩尔。

    Electron beam generator for an electron gun
    7.
    发明授权
    Electron beam generator for an electron gun 失效
    用于电子枪的电子束发生器

    公开(公告)号:US5118991A

    公开(公告)日:1992-06-02

    申请号:US579792

    申请日:1990-09-10

    IPC分类号: H01J37/248 H02H7/00

    CPC分类号: H01J37/248 H02H7/00

    摘要: In an electron beam generator where the heating current for the cathode is transformed by an insulating transformer 7 disposed on the high-voltage insulator 4 of the beam head, the primary winding of this insulating transformer 7 being connected to ground potential, and where a single-pole high-voltage connection 2 and a single-pole high-voltage cable 2 connect the beam head 3 to a high-voltage generator 1, the high-voltage cable 2, at its terminal ends, has a protective resistor 10 corresponding to the surge impedance of the high-voltage cable 2 in order to reduce the damages to insulating and component parts.

    摘要翻译: 在通过设置在光束头的高压绝缘体4上的绝缘变压器7使阴极的加热电流变换的电子束发生器中,该绝缘变压器7的初级绕组连接到地电位,并且其中单个 杆高压连接2和单极高压电缆2将光束头3连接到高压发生器1,高压电缆2在其末端具有对应于高压发生器1的保护电阻器10 为了减少对绝缘和部件的损坏,高压电缆2的浪涌阻抗。