METHOD OF REACTIVE EXTRUSION COPOLYMERIZATION OF VINYL MONOMERS

    公开(公告)号:US20190040174A1

    公开(公告)日:2019-02-07

    申请号:US16157974

    申请日:2018-10-11

    Abstract: A method of reactive extrusion copolymerization of vinyl monomer consisting of (1) feeding vinyl monomer or at least one vinyl monomer together with an initiator into the first screw of twin-screw extruder, and modified resin into the subsequent screw section; (2) feeding the above monomer into the screw segment after auto-acceleration zone and feeding the initiator corresponding to the temperature of barrel and micro/nano inorganic modified fillers after the half-life period of the initiator; (3) feeding the antioxidant and anti-UV agent at the end of the polymerization, and then removing unpolymerized monomer and by-products by devolatilization of screw segment; (4) obtaining vinyl copolymer resin with a anticipated molecular weight of 5×102 to 6×105 from the reactive extrusion polymerization by controlling the temperature of different screw segments. The invention which overcomes the existing defects of the free radical polymerization by reactive extrusion technology, can not only meet the requirement of short stay time of reactive extrusion polymerization, combine the functionalization and high performance, but also make it possible to obtain high molecular weight polymers.

    Supported polymetal olefin polymerization catalyst, preparation method and use thereof

    公开(公告)号:US10053523B2

    公开(公告)日:2018-08-21

    申请号:US15535902

    申请日:2015-11-25

    Abstract: The present invention relates to a supported polymetal olefin polymerization catalyst, comprising a porous support, a magnesium-containing support component, a transition metal titanium component supported on the porous support, and further comprising at least one non-magnesium metal component supported on the porous support. Further provided is a preparation method and a use of the supported polymetal olefin polymerization catalyst. An efficient composite support supported polymetal Ziegler-Natta catalyst is provided in the present invention, wherein a porous support, a soluble magnesium compound, and a soluble non-magnesium metal compound are used as raw materials. The supporting of titanium is achieved while a composite support containing magnesium and non-magnesium metal components is formed in situ in the surface of the porous support. The present invention has the advantage of a simple preparation method, a low cost, a controllability of morphology, properties of the catalyst, etc. Comparing the provided catalyst with the same type of magnesium/titanium catalyst free of non-magnesium metal components, the catalytic performance such as polymerization activity, hydrogen regulation sensitivity and copolymerization performance are significantly improved.

    ELECTRIC DESALTING AND DEHYDRATION APPARATUS
    79.
    发明申请

    公开(公告)号:US20180201846A1

    公开(公告)日:2018-07-19

    申请号:US15742044

    申请日:2016-06-21

    Abstract: Provided is an electric desalting and dehydration apparatus, including an oil inlet distributor of an upper electric field, wherein the oil inlet distributor includes an oil inlet distributing pipe and an oil inlet branch pipe. The oil inlet distributing pipe is arranged in a water tray of an electric desalter, and below a ground electrode of the electric desalter. The oil inlet branch pipe is connected to the oil inlet distributing pipe to supply crude oil into the oil inlet distributing pipe. The oil inlet distributing pipe is provided with oil outlets on both sides thereof in a horizontal direction. The distributor can uniformly distribute crude oil in a water tray, thus all of the crude oil is kept in an electric field for an equal time.

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