Process of producing magnesia with sulfuric acid recycle
    1.
    发明授权
    Process of producing magnesia with sulfuric acid recycle 失效
    用硫酸回收生产氧化镁的工艺

    公开(公告)号:US4096235A

    公开(公告)日:1978-06-20

    申请号:US731890

    申请日:1976-10-13

    IPC分类号: C01F5/12 C01F5/40

    CPC分类号: C01F5/12 C01F5/40

    摘要: This invention relates to a process of producing magnesia from magnesium-containing carbonate ores, which comprises leaching with sulfuric acid, subsequently neutralizing the solution with magnesia, separating the undissolved impurities, crystallizing magnesium sulfate under pressure and above 150.degree. C so the crystals have from 1.5 to 4 moles of water per magnesium sulfate molecule and thermally decomposing the latter to form magnesia and SO.sub.2, recovering sulfuric acid from the sulfur dioxide produced in the decomposing steps and recycling the sulfuric acid to the leaching stage.

    摘要翻译: 本发明涉及一种由含镁碳酸盐矿石生产氧化镁的方法,其中包括用硫酸浸出,随后用氧化镁中和溶液,分离未溶解的杂质,在压力和150℃以上使硫酸镁结晶,使晶体从 每个硫酸镁分子1.5至4摩尔水,并将其热分解形成氧化镁和SO 2,从分解步骤中产生的二氧化硫中回收硫酸并将硫酸再循环至浸出阶段。

    Electrostatic filter cable
    2.
    发明授权
    Electrostatic filter cable 失效
    静电过滤电缆

    公开(公告)号:US5068497A

    公开(公告)日:1991-11-26

    申请号:US577940

    申请日:1990-09-05

    申请人: Wolfgang Krieger

    发明人: Wolfgang Krieger

    IPC分类号: H01B7/00

    CPC分类号: H01B7/0054

    摘要: An electrostatic filter cable for an electrostatic filter system includes an internal electrical conductor formed of an electrically conductive plastic with a specific resistance in a range of substantially from 2 to 200 .OMEGA. mm.sup.2 /m. An insulation of cross-linked polyethylene is disposed on the internal electrical conductor. An outer conductive layer is disposed on the insulation. A copper shield is disposed on the outer conductive layer. An outer PVC jacket is disposed on the copper shield.

    摘要翻译: 用于静电过滤系统的静电过滤器电缆包括由导电塑料形成的内部电导体,其电阻率基本上在2至200欧姆/平方毫米的范围内。 交联聚乙烯的绝缘体设置在内部电导体上。 外绝缘层设置在绝缘体上。 铜屏蔽设置在外导电层上。 外部PVC护套设置在铜屏蔽上。