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    Roasting materials containing roastable sulfur with arsenic and/or antimony
    1.
    发明授权
    Roasting materials containing roastable sulfur with arsenic and/or antimony 失效
    含有硫酸和/或抗氧化剂的可转移硫磺的材料

    公开(公告)号：US3656933A

    公开(公告)日：1972-04-18

    申请号：US3656933D

    申请日：1969-06-03

    Applicant: BASF AG

    Inventor： WOLF HERBERT ,  GOESELE WILHELM

    IPC: C01B17/52 ,  C22B1/10

    CPC classification number: C22B1/10 ,  C01B17/52

    Abstract: A fluidized-bed method of roasting sulfidic materials containing arsenic and/or antimony with a gas containing oxygen with separate supply of the gas containing oxygen for the preroasting in a first stage and for the afterroasting in the second stage and with separate withdrawal of the roaster gas from the preroasting stage and from the afterroasting stage. The dusty portion of the roasted intermediate product from the first stage is introduced periodically into the fluidized bed of the second stage and, in timed relationship with this periodic introduction of the roasted intermediate product, air is periodically introduced into the gas space above the fluidized bed in the second layer in such an amount that it is adequate for complete roasting of the dusty roasted intermediate products suspended in this gas space.

    Abstract translation: 一种流化床方法，其将含有砷和/或锑的硫化物料与含氧气体分开供应含有氧气的气体，用于在第一阶段中进行预先煅烧，并在第二阶段中进行后处理，并单独抽出焙烧炉 来自前期阶段和后期阶段的气体。 来自第一阶段的焙烧中间产物的多尘部分周期性地引入第二阶段的流化床，并且与定期引入焙烧的中间产物的定时关系定期地将空气引入流化床上方的气体空间 在第二层中，其量足以完全焙烧悬浮在该气体空间中的多尘的中间产物。

    STABILIZED WATER-CONTAINING SODIUM DITHIONITE FORMULATIONS WHICH HAVE BEEN RENDERED ALKALINE
    9.
    发明专利
    STABILIZED WATER-CONTAINING SODIUM DITHIONITE FORMULATIONS WHICH HAVE BEEN RENDERED ALKALINE 未知

    公开(公告)号：CA1263218A

    公开(公告)日：1989-11-28

    申请号：CA474817

    申请日：1985-02-21

    Applicant: BASF AG

    Inventor： APPL MAX ,  GOESELE WILHELM ,  MELZER JAROSLAV ,  SCHREINER SIEGFRIED ,  TREIBER GERT

    IPC: C01B17/66 ,  D06L4/30 ,  D06P5/10 ,  D21C9/10 ,  C01F5/14

    Abstract: The invention relates to a stabilized watercontaining sodium dithionite formulation having the consistency of a pumpable paste with a viscosity of 0.1 to 1,500 Pa.s, a pH > 10 and containing 60 to 70% by weight of sodium dithionite and 15 to 30% by weight of water, the total content of these two components in the formulation not exceeding 90% by weight, and furthermore containing a sodium and/or potassium salt which is dissolved in the water, is inert to sodium dithionite and has a water solubility greater than 500 g/l at 20.degree.C, the salt being a member selected from the group consisting of sodium formate, sodium acetate, sodium hydroxymethanesulfinate, potassium carbonate and potassium sulfite and mixtures thereof, with the proviso that the concentration of the sodium and/or potassium salt dissolved in the water is not less than 200 g/l. The paste is useful as reducing agent.

    10.
    发明专利
    未知

    公开(公告)号：FI77701B

    公开(公告)日：1988-12-30

    申请号：FI850410

    申请日：1985-01-31

    Applicant: BASF AG

    Inventor： APPL MAX ,  GOESELE WILHELM ,  MELZER JAROSLAV ,  SCHREINER SIEGFRIED ,  TREIBER GERT

    IPC: C01B17/66 ,  D06L4/30 ,  D06P5/10 ,  D21C9/10

    Abstract: Stabilized water-containing sodium dithionite formulations which have been rendered alkaline have the consistency of a pumpable paste. They additionally contain readily soluble sodium salts and/or potassium salts which are inert to sodium dithionite and whose water-solubility at 20 DEG C. exceeds 500 g/l. These salts are present in the aqueous phase in an amount of not less than 200 g/l. The pastes are useful reducing agents.

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