Process for recovering waste heat from formaldehyde product gas
    81.
    发明授权
    Process for recovering waste heat from formaldehyde product gas 失效
    从甲醛产品气中回收废热的工艺

    公开(公告)号:US4691060A

    公开(公告)日:1987-09-01

    申请号:US931990

    申请日:1986-11-25

    IPC分类号: F22B1/18 C07C45/38 C07C47/052

    摘要: Waste heat possessed by a hot formaldehyde product gas obtained by catalytic reaction of methanol with air is heat exchanged with pressurized water in a waste heat boiler, thereby generating steam, and then leading the product gas to a formaldehyde absorption column, thereby absorbing formaldehyde, into an aqueous solution, and heat exchanging a recycling solution for a feed gas humidifier with the aqueous solution withdrawn from the bottom of absorption column. The waste heat can be efficiently recovered without deposition of paraformaldehyde on the heat transfer surface of heat exchanger and the amount of additional steam can be reduced or made entirely zero.

    摘要翻译: 通过甲醇与空气的催化反应获得的热甲醛产物气体的余热与废热锅炉中的加压水进行热交换,从而产生蒸汽,然后将产物气体导入甲醛吸收塔,从而吸收甲醛 水溶液,并且从吸收塔底部排出的水溶液与用于进料气体加湿器的再循环溶液进行热交换。 可以有效地回收废热,而不会在热交换器的传热表面上沉积多聚甲醛,并且可以将附加蒸汽的量减少或完全制成零。

    Magnetic recording medium
    82.
    发明授权
    Magnetic recording medium 失效
    磁记录介质

    公开(公告)号:US4501801A

    公开(公告)日:1985-02-26

    申请号:US551040

    申请日:1983-11-14

    摘要: Improved magnetic media comprising a non-magnetic substrate and a magnetic layer formed on at least one side of the substrate. The magnetic recording media are provided in a variety of ways with a specific type of organosilane compound serving as a lubricant and represented by the following general formula: ##STR1## where R is a saturated or unsaturated monovalent hydrocarbon residue having from 7 to 21 carbon atoms, n is 0, 1 or 2, and p is an integer from 1 to 12. The organosilane lubricant compound may be incorporated in the magnetic layer itself, in a back coating layer, or it may constitute a layer on the magnetic layer or on the back coating layer.

    摘要翻译: 改进的磁介质包括非磁性基底和形成在基底的至少一侧上的磁性层。 磁记录介质以各种方式与特定类型的用作润滑剂的有机硅烷化合物一起提供,并由以下通式表示:其中R是具有7至21个碳原子的饱和或不饱和的一价烃残基 ,n为0,1或2,p为1〜12的整数。有机硅烷润滑剂可以在磁性层本身,背面涂层中,也可以在磁性层上形成层 后涂层。