Filtration process using polyolefin fibrids as filter aids
    1.
    发明授权
    Filtration process using polyolefin fibrids as filter aids 失效
    使用聚烯烃纤维素作为助滤剂的过滤方法

    公开(公告)号:US4274971A

    公开(公告)日:1981-06-23

    申请号:US141352

    申请日:1980-04-18

    IPC分类号: B01D37/02 B01J20/22

    CPC分类号: B01D37/02 B01J20/22

    摘要: In a filtration process for filtering or clarifying aqueous suspensions of finely divided solid materials, a filter aid comprising polyolefin fibrids, e.g., polyethylene or polypropylene fibrids, is added to the suspension to be filtered. The filter aid comprising polyolefin fibrids which have been rendered hydrophilic may also be used to precoat a filter medium.

    摘要翻译: 在用于过滤或澄清细碎固体材料的水悬浮液的过滤方法中,将包含聚烯烃纤条体(例如聚乙烯或聚丙烯纤条体)的助滤剂加入待过滤的悬浮液中。 包含已经具有亲水性的聚烯烃纤条体的助滤剂也可用于预涂过滤介质。

    Procedure for sealing leaks in closed cooling systems
    3.
    发明授权
    Procedure for sealing leaks in closed cooling systems 失效
    封闭冷却系统密封泄漏的程序

    公开(公告)号:US3947610A

    公开(公告)日:1976-03-30

    申请号:US495511

    申请日:1974-08-07

    IPC分类号: C09K3/12 B32B15/00

    CPC分类号: C09K3/12

    摘要: Leaks in closed cooling systems containing an aqueous medium as the coolant, are sealed by electroless deposition of a metal or metal containing compound from a water soluble, easily reducible metal compound. A complexing agent may be added to the coolant to assist in solubilizing the easily reducible metal compound. In one embodiment, the reducible metal compound is formed in situ by attacking the conduit walls of the cooling system so as to form solubilized compounds, or compounds which can be solubilized by addition of suitable complexing agents.

    摘要翻译: 包含含水介质作为冷却剂的封闭冷却系统中的泄漏通过从水溶性易于还原的金属化合物中无电沉积含金属或金属的化合物来密封。 可以向冷却剂中加入络合剂以帮助溶解容易还原的金属化合物。 在一个实施方案中,可还原的金属化合物通过攻击冷却系统的导管壁而原位形成,以便形成可溶性化合物,或通过加入合适的络合剂可以溶解的化合物。