Magnesium-enhanced lime scrubbing of sulfur dioxide with production of a
high solids content sludge
    1.
    发明授权
    Magnesium-enhanced lime scrubbing of sulfur dioxide with production of a high solids content sludge 失效
    生产高固体含量污泥的二氧化硫的镁增强石灰洗涤

    公开(公告)号:US5384111A

    公开(公告)日:1995-01-24

    申请号:US191413

    申请日:1994-02-03

    CPC分类号: B01D53/502

    摘要: Sulfur dioxide is removed from a gaseous stream using an aqueous scrubbing medium containing calcium components and magnesium ions, so as to produce a more readily dewatered aqueous calcium sulfite-containing sludge by providing in the aqueous scrubbing medium in an aqueous scrubbing unit an effective amount of at least one amine sulfonate ion of the formula: ##STR1## where R is H or OH, and R' is H or SO.sub.3, with R and R' not both being H. The amine sulfonate ion is preferably provided by adding an amine disulfonate salt having the formula HN(SO.sub.3 X).sub.2 or a hydroxylamine monosulfonate salt having the formula HO--NH--(SO.sub.3 X), when X is an alkali or alkaline earth metal. Or an effluent stream from a scrubbing unit for nitrogen oxides containing a metal chelate and an amine sulfonate may be added to provide the amine sulfonate ion.

    摘要翻译: 使用含有钙组分和镁离子的含水洗涤介质从气流中除去二氧化硫,从而通过在含水洗涤介质中在水洗涤单元中提供有效量的 至少一种下式的胺磺酸根离子,其中R是H或OH,R'是H或SO 3,其中R和R'都不是H.胺磺酸根离子优选通过加入胺二磺酸盐 具有式HN(SO3X)2的盐或具有式HO-NH-(SO3X)的羟胺单磺酸盐,当X是碱金属或碱土金属时。 或者可以加入来自洗涤单元的用于含有金属螯合物和胺磺酸盐的氮氧化物的流出物流以提供胺磺酸根离子。

    High-purity magnesium hydroxide and process for its production
    2.
    发明授权
    High-purity magnesium hydroxide and process for its production 失效
    高纯度氢氧化镁及其生产工艺

    公开(公告)号:US06214313B1

    公开(公告)日:2001-04-10

    申请号:US09290839

    申请日:1999-04-13

    IPC分类号: C01F522

    摘要: Magnesium hydroxide of high purity, having a fine particle size suitable for use in flame retardants and other high-end uses, is produced by utilizing flue gas desulfurization system process slurry as feedstock; the production process is absent energy-intensive steps as well as high-cost chemical usage.

    摘要翻译: 通过利用烟道气脱硫系统工艺浆料作为原料生产具有适用于阻燃剂和其它高端用途的细粒度的高纯度氢氧化镁。 生产过程中缺少能源密集型的步骤以及高成本化学品的使用。