Process for the purification of para-nitrophenol
    1.
    发明授权
    Process for the purification of para-nitrophenol 失效
    对硝基苯酚的纯化方法

    公开(公告)号:US3954892A

    公开(公告)日:1976-05-04

    申请号:US340903

    申请日:1973-03-13

    Applicant: Andre Perrin

    Inventor: Andre Perrin

    CPC classification number: C07C201/16 C07C201/08 C07C205/22

    Abstract: In the nitration of phenol with nitric acid, decantation of the residual acid, and steam distillation of ortho-nitrophenol to leave an aqueous distillation residue of para-nitrophenol, a cleaner purer crystalline para-nitrophenol product is obtained by cooling the hot distillation residue when it contains at least 0.5% of sodium bisulphite and is at pH 5.4 to 6.4.

    Abstract translation: 在用硝酸硝化苯酚的同时,将残余的酸进行硝酸化,并将邻硝基苯酚蒸汽蒸馏除去对硝基苯酚的水蒸馏残余物,通过冷却热蒸馏残渣得到更清洁的纯的对硝基苯酚产物, 它含有至少0.5%的亚硫酸氢钠,pH在5.4至6.4。

    Parallel kinematic positioning system
    2.
    发明申请
    Parallel kinematic positioning system 失效
    平行运动定位系统

    公开(公告)号:US20100122602A1

    公开(公告)日:2010-05-20

    申请号:US12313055

    申请日:2008-11-17

    Abstract: A parallel kinematic positioning system 10 (PKPS 10) that is comprised of a stationary base plate (12) and an upper movable platform (28) to which is attached a workpiece or an instrument. Between the stationary base plate (12) and the upper movable platform (28) are positionally attached six strut assemblies (50). The six strut assemblies operate a hexapod that include in combination, a counterbalance subassembly (111), a servo motor subassembly (134), a bearing and encoder subassembly (156) and an electronics circuit (190). The combination accurately and repeatably positions the upper movable platform (28) within six degrees of freedom relative to the base plate (12).

    Abstract translation: 并联运动学定位系统10(PKPS 10),其包括固定基板(12)和上可移动平台(28),工件或仪器连接到该上运动平台。 在固定基板(12)和上部可移动平台(28)之间位置连接有六个支柱组件(50)。 六个支柱组件操作六脚架,其包括组合的平衡子组件(111),伺服电动机子组件(134),轴承和编码器子组件(156)和电子电路(190)。 该组合将上部可移动平台(28)相对于基板(12)精确地和可重复地定位在六个自由度内。

    Parallel kinematic positioning system
    3.
    发明授权
    Parallel kinematic positioning system 失效
    平行运动定位系统

    公开(公告)号:US08215199B2

    公开(公告)日:2012-07-10

    申请号:US12313055

    申请日:2008-11-17

    Abstract: A parallel kinematic positioning system 10 (PKPS 10) that is comprised of a stationary base plate (12) and an upper movable platform (28) to which is attached a workpiece or an instrument. Between the stationary base plate (12) and the upper movable platform (28) are positionally attached six strut assemblies (50). The six strut assemblies operate a hexapod that include in combination, a counterbalance subassembly (111), a servo motor subassembly (134), a bearing and encoder subassembly (156) and an electronics circuit (190). The combination accurately and repeatably positions the upper movable platform (28) within six degrees of freedom relative to the base plate (12).

    Abstract translation: 并联运动学定位系统10(PKPS 10),其包括固定基板(12)和上可移动平台(28),工件或仪器连接到该上运动平台。 在固定基板(12)和上部可移动平台(28)之间位置连接有六个支柱组件(50)。 六个支柱组件操作六脚架,其包括组合的平衡子组件(111),伺服电动机子组件(134),轴承和编码器子组件(156)和电子电路(190)。 该组合将上部可移动平台(28)相对于基板(12)精确地和可重复地定位在六个自由度内。

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