中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

748 records (took 0.029 seconds)

    Method of preparing fibrils having properties for making improved paper sheets
    3.
    发明授权
    Method of preparing fibrils having properties for making improved paper sheets 失效
    制备具有改良纸张性质的原纤维的方法

    公开(公告)号：US3904728A

    公开(公告)日：1975-09-09

    申请号：US29808572

    申请日：1972-10-16

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： DAVIS JOSEPH C ,  GALIANO FRANCIS R ,  HILL ROBERT W

    IPC: D21B1/06 ,  B02C18/00

    CPC classification number: D21H5/202 ,  D21B1/063 ,  D21H13/14

    Abstract: An improvement in the fibril formation process which includes dissolving at an elevated temperature an olefin polymer having an inherent viscosity of at least 3.5 in a hot hydrocarbon solvent, shearing the hot polyolefin solution to thereby orient the polymer molecules therein, passing the sheared solution through a cooling zone maintained below the precipitation temperature of the solution while maintaining the orientation of the polymer molecules within the solution to thereby precipitate by thermal means the polymer in the form of a solvent swollen fibrous mass, separating a substantial portion of the polymer solvent from the fibrous mass, beating the fibrous mass in a liquid which is a non-solvent for the polymer and which is soluble in the polymer solvent for a time sufficient to break down the fibrous mass into a plurality of fibrils, and separating the fibrils from the nonsolvent liquid. The improvement consists of incorporating from about 5 up to about 15 weight percent based on the weight of the polyolefin of a surfactant selected from the group consisting of those nonionic surfactants having an HLB value from 7 to 12 and those anionic surfactants having an HLB value greater than 13 into the hot polyolefin/hydrocarbon solvent solution prior to the fibril formation steps of the process whereby the resultant fibrils containing the surfactant possess improved hydrophilic properties and paper sheets fabricated from these fibrils possess improved physical properties, particularly increased tensile strength.

    Abstract translation: 原纤维形成方法的改进，其包括在高温下将热固性烃溶剂中特性粘度至少为3.5的烯烃聚合物溶解，剪切热聚烯烃溶液，从而使聚合物分子在其中定向，使剪切溶液通过 冷却区保持低于溶液的沉淀温度，同时保持聚合物分子在溶液中的取向，从而通过热法沉淀出溶剂溶胀纤维团形式的聚合物，将大部分聚合物溶剂与纤维 将纤维质量在作为聚合物的非溶剂的液体中打浆，并且其可溶于聚合物溶剂中足以将纤维物质分解成多个原纤维的时间，并将原纤与非溶剂液体分离 。 改进之处在于从基于聚烯烃重量的约5至约15重量％的表面活性剂，该表面活性剂选自HLB值为7至12的那些非离子表面活性剂和HLB值较大的那些阴离子表面活性剂 在进行原纤维形成步骤之前，将其加热到热的聚烯烃/烃溶剂溶液中，由此所得到的含有表面活性剂的原纤维具有改善的亲水性，并且由这些原纤维制成的纸张具有改善的物理性能，特别是增加的拉伸强度。

    Downhole bypass valve
    4.
    发明授权
    Downhole bypass valve 失效
    卧式旁瓣阀

    公开(公告)号：US3901333A

    公开(公告)日：1975-08-26

    申请号：US51829974

    申请日：1974-10-29

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： MORI ERNEST A

    IPC: E21B21/10 ,  E21B34/00 ,  E21B34/12 ,  E21B17/04 ,  E21B41/00

    CPC classification number: E21B21/103 ,  E21B34/12 ,  E21B2034/002

    Abstract: A downhole bypass valve in which a tubular mandrel is slidable between an upper position and a lower position in a tubular member at the lower end of a drill string. A lateral opening in the tubular mandrel uncovers a port in the tubular member to allow flow between the central bore of the tubular member and the annulus surrounding the drill string. A valve in the bore of the tubular mandrel closes as the tubular mandrel moves to the upper position and opens as the mandrel moves to the lower position. Movement of the mandrel relative to the tubular member is prevented by a ring extending from the outer surface of the tubular mandrel into a liquid-filled chamber in the tubular member until the spring biasing of check valves is overcome to allow flow through passages through the ring.

    3,5-Tert. butyl-4-(2,4-dichlorophenylcarbamyloxy) benzylidenemalonitrile
    5.
    发明授权
    3,5-Tert. butyl-4-(2,4-dichlorophenylcarbamyloxy) benzylidenemalonitrile 失效
    3,5-Tert。 丁基-4-（2,4-二氯苯基氨基甲酰氧基）亚苄基腈

    公开(公告)号：US3890367A

    公开(公告)日：1975-06-17

    申请号：US36477273

    申请日：1973-05-29

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： CAHOY ROGER PAUL

    IPC: A01N47/22 ,  C07C271/06 ,  C07C121/70

    CPC classification number: A01N47/22 ,  C07C271/06

    Abstract: Fungus and bacterial foliar diseases of plants are combated by applying to the plants an effective but substantially nonphytotoxic amount of a compound having the structural formula

    IN WHICH X is selected from the group consisting of hydrogen and chloro and nitro substituents, Y is selected from the group consisting of hydrogen and chloro and fluoro substituents, and Z is selected from the group consisting of hydrogen and chloro substituents, at least one of X, Y and Z being hydrogen.

    Abstract translation: 通过向植物施用有效但基本上非植物毒性的具有结构式为X的化合物，其中X选自氢和氯和硝基取代基，Y选自植物的真菌和细菌叶病 由氢和氯和氟取代基组成的组，Z选自氢和氯取代基，X，Y和Z中的至少一个是氢。

    Method for reducing the total acid number of a middle distillate oil
    9.
    发明授权
    Method for reducing the total acid number of a middle distillate oil 失效
    减少中间馏分油的总酸值的方法

    公开(公告)号：US3876532A

    公开(公告)日：1975-04-08

    申请号：US33638273

    申请日：1973-02-27

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： PLUNDO ROBERT A ,  READAL THOMAS C ,  STROM JAMES R

    IPC: C10G45/02 ,  C10G23/02

    CPC classification number: C10G45/02 ,  C10G2400/06

    Abstract: Middle distillate virgin oils, such as straight run furnace oil, jet fuel or kerosene are required to meet many commercial specifications, among which are maximum allowable total sulfur content, maximum allowable mercaptan sulfur content and maximum allowable total acid number. Middle distillates which do not meet commercial specifications in regard to total sulfur content can be hydrodesulfurized for the removal of the portion of the total sulfur required for meeting the commercial requirement. Such hydrodesulfurization requires more severe conditions than do processes for reduction of total acid number or for reduction of mercaptan sulfur content so that under the severe conditions required for hydrodesulfurization, excessive total acid number and excessive mercaptan content are automatically concomitantly reduced to commerically acceptable levels. The present invention relates to the hydrotreatment of virgin middle distillates which meet commercial specifications in regard to total sulfur content in the absence of prior hydrotreating or any other treatment, but do not meet commercial specifications in regard to total acid number or in regard to mercaptan sulfur content. According to the present invention, the latter middle distillates are not blended with high total sulfur feeds flowing to hydrodesulfurization processes requiring severe conditions to accomplish reduction in total sulfur content, but are hydrotreated separately under relatively more mild catalytic hydrotreating conditions to reduce mercaptan sulfur content or total acid number at hydrotreating severities which are so mild that there is an extremely limited consumption of hydrogen and a very limited removal of total sulfur. The catalyst employed in the mild hydrotreating processes of this invention is a deactivated hydrotreating catalyst from a more severe hydrodesulfurization or other hydrotreating operation which is no longer of viable use in the more severe operation due to numerous cycles of use and regeneration, due to excessive metals deposit thereon, or any other reason.

    Production of mixtures of carboxylic acids from mixtures of olefins
    10.
    发明授权
    Production of mixtures of carboxylic acids from mixtures of olefins 失效
    从烯烃混合物中生产羧酸的混合物

    公开(公告)号：US3870734A

    公开(公告)日：1975-03-11

    申请号：US36717873

    申请日：1973-06-05

    Applicant: GULF RESEARCH DEVELOPMENT CO

    Inventor： ONOPCHENKO ANATOLI ,  SCHULZ JOHANN G D

    IPC: C07C51/14 ,  C08H17/36

    CPC classification number: C07C51/14 ,  C07C53/128 ,  C07C53/126

    Abstract: A process for producing a mixture of carboxylic acids from a mixture of olefins having from 24 to 40 carbon atoms, preferably from a mixture of olefins having from 24 to 28 carbon atoms, which involves adding the mixture of olefins in a selected carrier to carbon monoxide and sulfuric acid and thereafter adding water to the reaction product so formed.

    Abstract translation: 一种由具有24-40个碳原子的烯烃的混合物制备羧酸的混合物的方法，优选由具有24至28个碳原子的烯烃的混合物制备，该方法包括将所选择的载体中的烯烃混合物加入到一氧化碳 和硫酸，然后向如此形成的反应产物中加入水。

Patent Agency Ranking