Process for the manufacture of sulphur which can be recycled
    2.
    发明授权
    Process for the manufacture of sulphur which can be recycled 失效
    制造可再循环的硫的方法

    公开(公告)号:US4418014A

    公开(公告)日:1983-11-29

    申请号:US393538

    申请日:1982-06-30

    申请人: Georg Daniek

    发明人: Georg Daniek

    摘要: The process for recovering recyclable sulphur from a strongly colored solution obtained from the production of sulphur dyestuffs containing alkali metal sulfides, alkali metal polysulfides, sulphur dyestuffs or mixtures thereof comprising(a) mixing said solution at an alkaline pH with a decolorizing amount of an iron or zinc compound which is a hydroxide or the salt of an inorganic acid whereby a precipitate is formed,(b) separating the precipitate to isolate a decolorized solution, and either(c) precipitating elemental sulphur from the decolorized solution by adding sulphur dioxide or alkali metal thiosulfate under acidic conditions, and(d) separating the precipitated elemental sulphur, or(e) recycling the decolorized solution for use in the manufacture of sulphur dyestuffs.

    摘要翻译: 从含有碱金属硫化物,碱金属多硫化物,硫化染料或其混合物的硫化染料的生产得到的强色溶液中回收可回收硫的方法,包括(a)在碱性pH下将所述溶液与脱色量的铁 或锌化合物,其是氢氧化物或无机酸的盐,由此形成沉淀物,(b)分离沉淀物以分离脱色溶液,和(c)通过加入二氧化硫或碱从脱色溶液中沉淀出元素硫 金属硫代硫酸盐在酸性条件下,和(d)分离沉淀的元素硫,或(e)回收脱色溶液用于制造硫化染料。

    Process for the manufacture of sulphur which can be recycled
    3.
    发明授权
    Process for the manufacture of sulphur which can be recycled 失效
    制造可再循环的硫的方法

    公开(公告)号:US4309401A

    公开(公告)日:1982-01-05

    申请号:US162417

    申请日:1980-06-24

    申请人: Georg Daniek

    发明人: Georg Daniek

    摘要: The process for recovering recyclable elemental sulfur from a strongly colored solution containing alkali metal sulfides, alkali metal polysulfides, or mixtures thereof comprising(a) mixing said solution at an alkaline pH with a decolorizing amount of an iron or zinc compound which is a hydroxide or the salt of an inorganic acid whereby a precipitate is formed,(b) separating the precipitate to isolate a decolorized solution,(c) precipitating elemental sulfur from the decolorized solution by adding sulfur dioxide or alkali metal thiosulfate under acidic conditions, and(d) separating the precipitated elemental sulfur.

    摘要翻译: 从含有碱金属硫化物,碱金属多硫化物或其混合物的强色溶液中回收可回收元素硫的方法,包括(a)在碱性pH下将所述溶液与脱色量的铁或锌化合物混合,所述铁或锌化合物是氢氧化物或 (b)分离沉淀物以分离脱色溶液,(c)通过在酸性条件下加入二氧化硫或碱金属硫代硫酸盐,从脱色溶液中沉淀出元素硫,和(d) 分离沉淀的元素硫。