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    74.
    发明专利
    未知

    公开(公告)号：ES2030018T3

    公开(公告)日：1992-10-16

    申请号：ES87108679

    申请日：1987-06-16

    Applicant: PHILLIPS PETROLEUM COMPANY

    Inventor： MCDANIEL, MAX PAUL ,  KLENDWORTH, DOUGLAS DEAN ,  NORWOOD, DONALD DWIGHT ,  HSIEH, ERIC TSU-YIN ,  BOGGS, ELIZABETH ANN

    IPC: C08F4/60 ,  C08F4/62 ,  C08F4/69 ,  C08F10/00 ,  C08F10/02 ,  C08F110/02

    Abstract: The catalyst system is produced by first forming a chromium catalyst on a predominantly silica support, activating in an oxygen-containing ambient and thereafter subjecting the thus activated composition to carbon monoxide reduction. The resulting reduced supported chromium catalyst composition is then precontacted with a cocatalyst selected from trialkyl boron compounds and dialkyl aluminum alkoxide compounds, preferably triethyl borane and thereafter contacted with ethylene. This results in a catalyst system which produces comonomer in situ so as to give tough, flexible ethylene copolymers from an essentially pure ethylene feed.

    75.
    发明专利
    未知

    公开(公告)号：MX9200179A

    公开(公告)日：1992-09-01

    申请号：MX9200179

    申请日：1992-01-16

    Applicant: PHILLIPS PETROLEUM COMPANY PHI

    Inventor： KUBICEK DONALD HUBERT KUBICEK ,  SCHUBERT PAUL FREDERICK SCHUBE

    IPC: B01J21/08 ,  B01J27/12 ,  B01J29/04 ,  B01J35/10 ,  B01J37/26 ,  C01B33/12 ,  C03C6/04

    Abstract: Described is a method for preparing a catalyst support material, comprising commercially available silica, by utilizing a fluorine-containing acid. The novel method is utilized to produce a novel composition that has unique physical properties different from those of typical commercially available silica materials. The novel support material has significantly improved values for crush strength and as good or better pore volume than comparable catalyst support materials. Due to these improved physical properties, the novel composition is more durable and longer lived. Furthermore, the greater pore volume of the novel composition provides for enhanced catalytic activity when the formed silica material is utilized as a catalyst support.

    RODBAFFLE HEAT EXCHANGER
    76.
    发明专利
    RODBAFFLE HEAT EXCHANGER 未知

    公开(公告)号：CA2038429A1

    公开(公告)日：1992-01-14

    申请号：CA2038429

    申请日：1991-03-18

    Applicant: PHILLIPS PETROLEUM COMPANY

    Inventor： GENTRY, CECIL C.

    IPC: F28D7/16 ,  F28F9/013 ,  F28F9/24

    Abstract: A rodbaffle heat exchanger is disclosed in which a plurality of detuning plates (50a,50b,50c) are provided to prevent the formation of standing acoustical waves from forming in the shell-side fluid flow path such that vibration and tube damage is prevented.

    PREPARATION OF BLOCK COPOLYMER
    79.
    发明专利
    PREPARATION OF BLOCK COPOLYMER 未知

    公开(公告)号：ZA871596B

    公开(公告)日：1987-08-26

    申请号：ZA871596

    申请日：1987-03-05

    Applicant: PHILLIPS PETROLEUM COMPANY

    Inventor： ALONZO GENE KITCHEN

    IPC: C08F4/42 ,  C08F4/08 ,  C08F297/04 ,  C08F

    Abstract: Sequential charging of initiator and monomers in a multistage solution polymerization process involving conjugated diene and monovinylaromatic monomers wherein the initial and final charges are monovinylaromatic monomer results in the production of polymodal linear block copolymers with terminal resinous blocks. A typical 6-stage charge sequence is as follows: stage 1: (Si); stage 2: (Si); stage 3: (B); stage 4: (Si); stage 5: (B) and stage 6: (S) wherein (Si) is monovinylaromatic monomer and initiator, (B) is conjugated diene monomer and (S) is monovinylaromatic monomer. At each stage, polymerization is allowed to continue until no free monomer is present. The polymodal block copolymer products comprise high, medium and low molecular weight species designated, respectively, as S1-S2-B1-S3-B2-S4; S2-B1-S3-B2-S4; and S3-B2-S4 wherein S1, S2, S3 and S4 represent, respectively, polyvinylaromatic blocks resulting from polymerization of the first, second, third and fourth charges of monovinylaromatic monomer (stages 1,2,4 and 6); B1 represents a polydiene block resulting from polymerization of the first charge of conjugated diene monomer (stage 3); and B2 represents a polydiene block resulting from polymerization of the second charge of conjugated diene monomer (stage 5). The subject copolymers can be fabricated into sheets and molded objects possessing little color, a high degree of transparency and excellent impact resistance. These fabricated products do not craze on being impacted.

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