Fluid transfer control system
    43.
    发明授权
    Fluid transfer control system 失效
    流体传输控制系统

    公开(公告)号:US3711457A

    公开(公告)日:1973-01-16

    申请号:US3711457D

    申请日:1971-02-19

    发明人: AYRES C

    摘要: A FLUID CONTROL SYSTEM IS PROVIDED WHEREBY THE CONTINUOUS TRANSFER OF FLUID FROM A SOURCE LOCATION TO AN ULTIMATE LOCATION IS ACCOMPLISHED WHILE MAINTAINING IN THE SOURCE LOCATION A SUBSTANTIALLY CONSTANT PRESSURE AND WHILE MAINTAINING IN THE ULTIMATE LOCATION A SUBSTANTIALLY CONSTANT TEMPERATURE: BY CONTROLLING THE TRANSFER OF FLUID FROM THE SOURCE LOCATION TO THE ULTIMATE LOCATION IN RESPONSE TO THE PRESSURES IN THE SOURCE LOCATION AND IN THE TRANSFER CONDUIT CONNECTING THE SOURCE LOCATION AND THE ULTIMATE LOCATION; AND BY CONTROLLING THE HEATING OF FLUID IN THE TRANSFER CONDUIT IN RESPONSE TO THE TEMPERATURES IN ULTIMATE LOCATION AND IN THE TRANSFER CONDUIT.

    Process for the recovery of essentially pure amorphous polyolefins
    44.
    发明授权
    Process for the recovery of essentially pure amorphous polyolefins 失效
    恢复基本无定形聚异戊二烯的方法

    公开(公告)号:US3705885A

    公开(公告)日:1972-12-12

    申请号:US3705885D

    申请日:1969-12-02

    申请人: STANDARD OIL CO

    CPC分类号: C08F6/04

    摘要: A PROCESS FOR THE SEPARATION OF ALPHA-OLEFIN POLYMERS HAVING DIFFERENT STERIC STRUCTURES WHICH COMPRISES ADJUSTING THE CONCENTRATION OF A SOLUTION OF AMORPHOUS POLYMER CONTAINING IN SUSPENSION STEREO-REGULAR CRYSTALLINE POLYMER AND SEMICRYSTALLINE STEREOBLOCK POLYMER TO 10-40 WEIGHT PERCENT OF POLYMER, CENTRIFUGING AND RECOVERING A SUBSTANTIALLY PURE STEREOREGULAR POLYMER, AND A SOLUTION OF AMORPHOUS POLYMER CONTAINING IN SUSPENSION STEREOBLOCK POLYMER, ADJUSTING, IF NECESSARY, THE CONCENTRATION OF THE LATTER SOLUTION TO 5-15 WEIGHT PERCENT POLYMER, FILTERING THE SOLUTION TO RECOVER SUBSTANTIALLY PURE STEREOBLOCK POLYMER, AND A FILRATE CONTAINING AMORPHOUS POLYMER, AND RECOVERING SUBSTANTIALLY PURE AMORPHOUS POLYMER FROM THE FILTRATE.

    Ternary catalyst systems for the polymerization of cycle olefins
    47.
    发明授权
    Ternary catalyst systems for the polymerization of cycle olefins 失效
    用于循环烯烃聚合的第三催化剂体系

    公开(公告)号:US3689471A

    公开(公告)日:1972-09-05

    申请号:US3689471D

    申请日:1968-08-26

    CPC分类号: C08F4/69 C08G61/08

    摘要: A METHOD FOR THE RING OPENING POLYMERIZATION OF UNSATURATED ALICYCLIC COMPOUNDS CONTAINING AT LEAST 4 AND NOT MORE THAN 5 CARBON ATOMS AND ONE DOUBLE BOND IN THE CYCLIC RING AND UNSATURATED ALICYCLIC COMPOUNDS CONTAINING AT LEAST 8 CARBON ATOMS AND AT LEAST ONE DOUBLE BOND IN THE CYCLIC RING IS DISCLOSED WHICH COMPRISES SUBJECTING SUCH UNSATURATED ALICYCLIC COMPOUNDS TO A CATALYST SYSTEM COMPRISING (A) A TUNGSTEN OR MOLYBDENUM HALIDE OR OXYHALIDE, (B) AT LEAST ONE LEWIS ACID OF THE FORMULA MXN WHERE M IS A METAL REPRESENTED BY ALUMINUM, ZINC, GALLIUM, TIN AND ANTIMONY; X IS A HALOGEN SUCH AS BROMINE, CHLORINE, IODINE AND FLUORINE AND N IS AN INTEGER EQUAL TO THE VALENCE OF M AND (C) A REFUCING AGENT SELECTED FROM THE GROUP CONSISTING OF METALS, METAL HYDRIDES, ALKYL SECONDARY AMINES, ALKYL TERTIARY AMINES, SATURATED ALKYL ALCOHOLS, ALKYL PHOSPHINES AND HYDROGEN.

    Polymerization of olefins with silane modified catalyst system
    48.
    发明授权
    Polymerization of olefins with silane modified catalyst system 失效
    烯烃与硅烷改性催化剂体系的聚合

    公开(公告)号:US3687920A

    公开(公告)日:1972-08-29

    申请号:US3687920D

    申请日:1971-01-25

    发明人: JOHNSON ROBERT N

    摘要: Silane compounds of the structure H3Si(SiH2)mH and R4 nSiHn wherein m is 0 to 3 inclusive, n is 0 to 3 inclusive and R is C1 to C10 hydrocarbon are used with supported bis(cyclopentadienyl)chromium (II) catalysts for the polymerization of olefins in order to improve the productivity of the catalyst.

    摘要翻译: 与负载的双(环戊二烯基)铬[II]催化剂一起使用结构H3Si [SiH2] mH和R4-nSiHn的硅烷化合物,其中m为0-3,包括端值,n为0-3,并且R为C1至C10烃。 烯烃的聚合以提高催化剂的生产率。

    Polymerization of olefins
    49.
    发明授权

    公开(公告)号:US3658780A

    公开(公告)日:1972-04-25

    申请号:US3658780D

    申请日:1969-10-22

    发明人: SCOGGIN JACK S

    IPC分类号: C08F10/00 C08F3/02 C08F3/08

    摘要: IN THE POLYMERIZATION OF AN OLEFIN, E.G., PROPYLENE, EMPLOYING HYDROGEN AS A MODIFIER IN THE POLYMERIZATION REACTION AND EXCESS MONOMER AS SOLVENT TO PRODUCE A DESIRED MELT INDEX POLYMER, RECYCLED UNPOLYMERIZED OR EXCESS MONOMER IS COMPLETELY FREED OF HYDROGEN BY FRACTIONATION OF THE RECOVERED MONOMER STREAM BY SUBMITTING THE SAME TO A DEGASSING OPERATION IN WHICH IN THE PREFERRED MODE OF OPERATION THE STREAM IS HEATED IN A FRACTIONATION ZONE TO EXPEL HYDROGEN THEREFROM AND THE OVERHEAD IS REFRIGERATED TO AVOID UNDUE LOSS OF MONOMER AND ALL OF THE MODIFIER HYDROGEN IS ADDED TO THE POLYMERIZATION REACTION FROM A SINGLE SOURCE.