Antifreeze purification
    1.
    发明授权
    Antifreeze purification 失效
    防冻净化

    公开(公告)号:US5474684A

    公开(公告)日:1995-12-12

    申请号:US391202

    申请日:1995-02-21

    申请人: Ronnie D. Gordon

    发明人: Ronnie D. Gordon

    摘要: The present invention in one embodiment, is a process that uses a chemical treatment to remove arsenic, organic acids, and heavy metals from antifreeze solutions. In one aspect such a method includes adding an iron salt, to an antifreeze solution containing arsenic and heavy metals with adequate mixing for dispersion throughout the solution. Then, a base is added to increase the pH to a level from about 8 to 10. As the base is added, a precipitate forms and is then removed by standard filtration techniques. The arsenic, organic acids, and heavy metals co-precipitate with the iron and are removed by filtration. The process may either be a batch process or a continuous process.

    摘要翻译: 在一个实施方案中的本发明是使用化学处理从防冻溶液中除去砷,有机酸和重金属的方法。 在一个方面,这种方法包括向含有砷和重金属的防冻溶液中加入铁盐,充分混合以在整个溶液中分散。 然后,加入碱以将pH升高至约8至10的水平。当加入碱时,形成沉淀,然后通过标准过滤技术除去。 砷,有机酸和重金属与铁共沉淀并通过过滤除去。 该过程可以是批处理或连续过程。

    Acid wastewater treatement
    2.
    发明授权
    Acid wastewater treatement 失效
    酸性废水处理

    公开(公告)号:US5645730A

    公开(公告)日:1997-07-08

    申请号:US638716

    申请日:1996-04-29

    摘要: A process for treating acid wastewater containing heavy metals has been invented, the process including adding fly ash to the acid wastewater to reduce heavy metals content of the acid wastewater. In one aspect the acid wastewater contains soluble iron and adding fly ash reduces the level of soluble iron. In one aspect the acid wastewater contains sulfate ions and adding fly ash reduces the sulfate ion level. In one aspect solid silicate salts are added to the acid wastewater. Preferably undesirable very hydrous iron hydroxide precipitate is not formed. In certain aspects the pH of the acid wastewater is raised to an environmentally acceptable level. In one aspect the process is a batch process. In another aspect the process is a continuous process.

    摘要翻译: 已经发明了一种处理含有重金属的酸性废水的方法,该方法包括向酸性废水中加入飞灰以降低酸性废水的重金属含量。 在一个方面,酸性废水含有可溶性铁,并且添加飞灰降低了可溶性铁的含量。 在一个方面,酸性废水含有硫酸根离子,并且加入飞灰降低硫酸根离子水平。 一方面,将固体硅酸盐加入酸性废水中。 优选不形成不需要的非常含水氢氧化铁的沉淀物。 在某些方面,酸性废水的pH升高到环境可接受的水平。 在一个方面,该过程是批处理。 在另一方面,该过程是连续过程。

    Production and purification of contaminated effluent streams containing
ammonium sulfate and ammonia
    3.
    发明授权
    Production and purification of contaminated effluent streams containing ammonium sulfate and ammonia 失效
    生产和净化含硫酸铵和氨的污染流出物流

    公开(公告)号:US5536385A

    公开(公告)日:1996-07-16

    申请号:US398104

    申请日:1995-03-03

    摘要: The present invention, in certain embodiments, teaches a process for treating ammonia or ammonium-sulfate-containing waste effluent from an acrylonitrile, caprolactam or acetonitrile manufacturing facility. In one such process the effluent is fed to a deep well oxidizer, e.g. a water oxidizer vertical tube reactor (super critical or subcritical), to degrade organic contaminants. Certain embodiments of the deep well oxidizer have, according to this invention, an oxygen inlet tube movable by a coil tubing system. The output stream from the vertical tube reactor is, preferably, filtered, and then it is fed to an electrodialysis unit. In one aspect the electrodialysis unit produces an output stream at a pH of about 5 with a concentration of ammonium sulfate at least, preferably, of about 15% by weight, and most preferably between about 20% and about 26% by weight. This output stream may be neutralized and then further treated to remove ammonia and/or ammonium sulfate solids, e.g. by a downstream ammonia stripper, evaporator, and/or crystallizer system or combination thereof.

    摘要翻译: 在某些实施方案中,本发明教导了用于处理来自丙烯腈,己内酰胺或乙腈制造设备的氨或含硫酸铵的废液流出物的方法。 在一个这样的方法中,将流出物进料到深井氧化器,例如, 水氧化剂立管反应器(超临界或亚临界),以降解有机污染物。 根据本发明,深井氧化器的某些实施例具有可通过盘管系统移动的氧气进气管。 优选地,将来自垂直管式反应器的输出流过滤,然后将其输送到电渗析单元。 在一个方面,电渗析装置产生pH为约5的输出流,其中硫酸铵的浓度至少优选为约15重量%,最优选为约20重量%至约26重量%。 该输出流可以被中和,然后进一步处理以除去氨和/或硫酸铵固体,例如。 通过下游氨汽提器,蒸发器和/或结晶器系统或其组合。