3.
    发明专利
    未知

    公开(公告)号:DE3869033D1

    公开(公告)日:1992-04-16

    申请号:DE3869033

    申请日:1988-09-22

    Applicant: BASF AG

    Abstract: A zine oxide contg desulphurisation material is claimed, contg 20-80 wt% high surface-area Zn0 and 20-80 wt% basic zinc carbonate, mixed with water to form, dried and calcined. The surface area of the zinc oxide is min 10 m2/g, pref over 30 m2/g; technical grade zinc carbonate is used, of formula 5Zno.2C02.3H20 The oxide and carbonate are blended with water (10-60 wt%, pref 20-50%, taken as proportion of total content), blending time 1-10h, usually 1-5h. The mixt is formed, and dried, and calcined.

    Catalyst for oxidising sulphur di:oxide to tri:oxide - has silica support with specified pore dia. distribution impregnated with activator

    公开(公告)号:DE4000609A1

    公开(公告)日:1991-07-18

    申请号:DE4000609

    申请日:1990-01-11

    Applicant: BASF AG

    Abstract: Catalyst for oxidn. of SO2 to SO3 consists of a SiO2 support activated with V and alkali metal cpds. The support: has a pore vol. fraction of 10-30% pores with dia. up to 15nm, 25-60% pores with dia. 15-200 nm and 10-60% pores with a dia. of over 200nm. The catalyst is produced by mixing SiO2 of the specified pore dia. with enough liquid (water and/or H2SO4) to give a mouldable mixt., moulding, drying and calcining the moulding (at 450-650 deg.C), impregnating the calcined material with activators and drying. USE/ADVANTAGE - The catalyst has very good mechanical properties (hardness and attrition in both the fresh and aged state), high activity over a wide temp. range (ca. 380-420 deg.C) and very low pressure drop. The high activity at relatively low temp. makes it possible to reduce operating costs by using a lower temp. than usual and also reduces SO2 emissions at low temp.

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