HAND-HELD MACHINE TOOL, MACHINE TOOL ASSEMBLY AND ADAPTER BUSHING

    公开(公告)号:US20210039241A1

    公开(公告)日:2021-02-11

    申请号:US16985878

    申请日:2020-08-05

    申请人: Roehm GmbH

    IPC分类号: B25F3/00 B25F5/02

    摘要: A hand-held machine tool having a machine spindle rotatably mounted in a machine housing, in which a control member and at least one locking member are mounted so as to be radially adjustable and are adjustable between a change position and a locking position by means of an adjusting sleeve guided on the machine spindle in such a way that, when adjusting the adjusting sleeve to the change position, the control member is acted upon radially inward by the adjusting sleeve and the locking member is not acted upon by the adjusting sleeve, that when adjusting the adjusting sleeve to the locking position, the locking member is acted upon by the adjusting sleeve, and that an adjusting ring mounted on the machine housing for adjusting the adjusting sleeve is provided between the change position and the locking position.

    CATALYST FOR THE OXIDATIVE ESTERIFICATION OF ALDEHYDES TO CARBOXYLIC ESTERS

    公开(公告)号:US20190084914A1

    公开(公告)日:2019-03-21

    申请号:US16134569

    申请日:2018-09-18

    申请人: Evonik Roehm GmbH

    摘要: The present invention relates to a novel process for oxidative esterification, generally for reaction of aldehydes with alcohols in the presence of oxygenous gases directly to give the corresponding ester in the presence of a heterogeneous catalyst, by means of which, for example, (meth)acrolein can be converted to methyl (meth)acrylate. The new catalyst has titanium dioxide as the main component of the support material. The catalysts are especially notable for high mechanical and chemical stability and for good catalytic performance even over very long periods. The process is an improvement in the catalyst service life, activity and selectivity over prior art catalysts which lose activity and/or selectivity relatively quickly in continuous operation in media having even a small water content.