Preparation of alkali metal nitrates
    2.
    发明授权
    Preparation of alkali metal nitrates 失效
    碱金属硝酸盐的制备

    公开(公告)号:US4995950A

    公开(公告)日:1991-02-26

    申请号:US236446

    申请日:1988-08-25

    IPC分类号: C25B1/14

    CPC分类号: C25B1/14

    摘要: Alkali metal nitrates are prepared by supplying the anode space of an electrolysis cell, separated from the cathode space by a perm-selective cation exchange membrane, with alkali metal chloride solution and at the same time supplying the cathode space with a nitric acid/alkali metal nitrate solution whose alkali metal nitrate concentration is not less than 10% by weight and whose HNO.sub.3 concentration is of from 0.1 to 10% by weight, and withdrawing from the cathode space a solution whose pH does not exceed 5.

    摘要翻译: 碱金属硝酸盐的制备方法是,通过用碱金属氯化物溶液供给由阴极空间分离的电解池的阳极空间与碱金属氯化物溶液,同时向阴极空间供给硝酸/碱金属 硝酸盐溶液,其碱金属硝酸盐浓度不小于10重量%,其HNO 3浓度为0.1至10重量%,并从阴极空间取出pH不超过5的溶液。

    Method for manufacturing metal parts
    4.
    发明授权
    Method for manufacturing metal parts 有权
    金属件制造方法

    公开(公告)号:US06939509B2

    公开(公告)日:2005-09-06

    申请号:US10239649

    申请日:2001-03-22

    申请人: Wolfgang Kochanek

    发明人: Wolfgang Kochanek

    摘要: The invention relates to a method for producing metal bodies by mixing metal compound particles with a binding agent and compacting them to form shaped parts, whereby the binding agent is subsequently removed and the metal compound is reduced to metal by gassing the same with a reductive gas at high temperatures. The reduction is carried out at temperatures lower than the sintering temperature of the reduced metal compound so that the formed reduced shaped bodies, while maintaining their original dimensions to a large extent, have a density less than that of the metal compound used. The metallic matrix obtained in such a manner can be subjected to a post compaction by applying mechanical forces. High-strength steel parts having very low residual porosities and a high geometric tolerance are obtained by sintering the matrix at usual sintering temperatures after compaction.

    摘要翻译: 本发明涉及一种通过将金属化合物颗粒与粘合剂混合并压实以形成成形部件来生产金属体的方法,由此随后除去粘合剂,并将金属化合物还原为金属,并用还原气体 在高温下。 还原在低于还原金属化合物的烧结温度的温度下进行,使得形成的还原成形体在保持其原始尺寸的同时,其密度小于所用金属化合物的密度。 以这种方式获得的金属基体可以通过施加机械力来进行后压实。 通过在压实后的通常的烧结温度下烧结基体,可获得具有非常低的残留孔隙和高几何公差的高强度钢部件。

    Removal of nobler metal ions than iron from process and waste waters
    5.
    发明授权
    Removal of nobler metal ions than iron from process and waste waters 失效
    从工艺和废水中去除卤素金属离子

    公开(公告)号:US5169538A

    公开(公告)日:1992-12-08

    申请号:US819730

    申请日:1992-01-13

    IPC分类号: C02F1/70 C22B15/00

    摘要: The application relates to a process for removing nobler metal ions than iron, especially copper ions, from acidic process and waste waters by reduction under an inert gas atmosphere with carbonyl iron powders which have previously been subjected to a thermal treatment with hydrogen to remove nitrides and carbides. This process results in residual metal ion content

    摘要翻译: 本申请涉及一种通过在惰性气体气氛下还原酸性工艺和废水中除铁(特别是铜离子)来除去贵金属离子的方法,其中羰基铁粉已经用氢气进行热处理以去除氮化物, 碳化物 该过程导致残余金属离子含量<0.5ppm,从而完全除去要还原的金属离子。