Precipitating agent for dephosphatizing effluent
    1.
    发明授权
    Precipitating agent for dephosphatizing effluent 失效
    脱水剂用于脱水的沉淀剂

    公开(公告)号:US4267058A

    公开(公告)日:1981-05-12

    申请号:US77227

    申请日:1979-09-20

    IPC分类号: B01D21/01 C02F1/52 C02F1/58

    CPC分类号: C02F1/5236 Y10S210/906

    摘要: A precipitating agent for the dephosphatization of effluent comprising by weight about 5 to 75% of active iron (III) sulphate, about 25 to 95% of active iron (III) oxide and 0 to about 10% of anhydrous magnesium sulphate. Optionally, an alkaline constituent such as the oxide or hydroxide of calcium or magnesium may also be present and dephosphatization is effected at a pH of about 4.5 to about 8.5. Extremely low contents of residual phosphorous can be obtained in the filtrate, a precipitate containing iron and phosphorous settling out cleanly.

    摘要翻译: 用于使流出物脱磷的沉淀剂包含重量约5至75%的活性硫酸铁(III),约25至95%的活性氧化铁(III)和0至约10%的无水硫酸镁。 任选地,也可以存在碱性成分如钙或镁的氧化物或氢氧化物,并且在约4.5至约8.5的pH下进行脱磷。 在滤液中可以获得极低的残留磷含量,含有铁和磷的沉淀物清洁地沉淀。

    Process for direct electrochemical gaseous phase phosgene synthesis
    2.
    发明授权
    Process for direct electrochemical gaseous phase phosgene synthesis 失效
    直接电化学气相光气合成工艺

    公开(公告)号:US5961813A

    公开(公告)日:1999-10-05

    申请号:US77062

    申请日:1998-05-18

    IPC分类号: C25B1/26 C25B1/24

    CPC分类号: C25B1/26

    摘要: An electrochemical cell (1 ) having a proton-conducting membrane (4) is used in the process for the direct electrochemical gas phase synthesis of phosgene. Dry HCl gas and dry CO gas are supplied as the educts to the anode (2) of the electrochemical cell (1). The chlorine radicals formed on anodic oxidation of the HCl gas then react directly with the CO gas to yield phosgene, while the simultaneously formed protons migrate through the membrane (4) to the cathode (3) and are there reduced to hydrogen or, in the presence of oxygen, to water.

    摘要翻译: PCT No.PCT / EP96 / 04934 371日期1998年5月18日 102(e)日期1998年5月18日PCT提交1996年11月12日PCT公布。 出版物WO97 / 19205 日期1997年5月29日在用于光气的直接电化学气相合成的方法中使用具有质子传导膜(4)的电化学电池(1)。 将干HCl气体和干CO气体作为离子流供给到电化学电池(1)的阳极(2)。 然后在HCl气体的阳极氧化上形成的氯自由基与CO气体直接反应,产生光气,同时形成的质子通过膜(4)迁移到阴极(3),并在那里还原成氢气 氧气存在于水中。