41.
    发明专利
    未知

    公开(公告)号:RO72506A

    公开(公告)日:1980-12-30

    申请号:RO9187477

    申请日:1977-10-18

    Abstract: Coated catalysts having an inert support material with an outer surface and a coating of active catalyst containing molybdenum, phosphorus, arsenic, copper and oxygen have been found to be especially effective catalysts for the production of unsaturated acids from the corresponding unsaturated aldehydes, for example, methacrolein is oxidized to methacrylic acid using these catalysts. The catalysts give a very low exotherm, very high single pass yields of the desired acid and reduce the undesirable byproducts.

    PROCESS FOR PREPARING AGGREGATES
    44.
    发明专利

    公开(公告)号:CA1007422A

    公开(公告)日:1977-03-29

    申请号:CA173596

    申请日:1973-06-08

    Abstract: 1444572 Hollow particles STANDARD OIL CO 13 July 1973 [13 July 1972] 7199/76 Divided out of 1444571 Heading C1A [Also in Division B5] An aggregate, Fig. 1, of solid particles having a rounded shape, a void centre and a single cavity in the external surface communicating with the void centre is produced by the process described in the parent Specification 1,444,571 modified by feeding the droplets of the slurry containing the solid particles on to a static particle bed so that the total droplet is not immersed in the bed and is allowed to dry in the bed without agitation. Specified materials include clay, ammonium nitrate and metal oxides.

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