中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

272 records (took 0.013 seconds)

    Balls containing tungsten carbide
    21.
    发明授权
    Balls containing tungsten carbide 失效
    含碳化钨的球

    公开(公告)号：US4182627A

    公开(公告)日：1980-01-08

    申请号：US944654

    申请日：1978-09-21

    Applicant: William H. Hardwick ,  Peter F. Wace ,  Peter J. Alder

    Inventor： William H. Hardwick ,  Peter F. Wace ,  Peter J. Alder

    IPC: B01J2/08 ,  B43K1/08 ,  C22C1/05 ,  B22F5/00 ,  B22F7/06

    CPC classification number: B01J2/08 ,  B43K1/082 ,  C22C1/051 ,  Y10S75/956

    Abstract: A process for producing balls of cobalt containing tungsten carbide, the process comprising forming droplets of a liquid mixture comprising: particles of tungsten carbide; guar gum; a dissolved cobalt salt; and a non-ionic wetting agent; contacting the droplets for not more than 1 hour with a base to precipitate a cobalt species, thereby forming droplets of a gel precipitate, placing the droplets of the gel precipitate in a vessel having a thermal conductivity not exceeding 100 cal/sec/cm.sup.2, and heating the vessel in a reducing atmosphere to remove the guar gum and to sinter the tungsten carbide and cobalt, thereby forming sintered balls of cobalt containing tungsten carbide.

    Abstract translation: 一种用于生产含有碳化钴的球的方法，该方法包括形成液体混合物的液滴，其包括：碳化钨颗粒; 瓜尔胶 溶解的钴盐; 和非离子润湿剂; 将液滴与碱接触不超过1小时以沉淀钴物质，从而形成凝胶沉淀物的液滴，将凝胶沉淀物的液滴放置在热导率不超过100cal / sec / cm 2的容器中，以及 在还原气氛中加热容器以除去瓜尔胶并烧结碳化钨和钴，从而形成含钴碳化钨的烧结球。

    Process for the manufacture of spherical alumina-containing particles
    22.
    发明授权
    Process for the manufacture of spherical alumina-containing particles 失效
    球形氧化铝颗粒的制造方法

    公开(公告)号：US4013587A

    公开(公告)日：1977-03-22

    申请号：US654923

    申请日：1976-02-03

    Applicant: Hermann Fischer ,  Hubert Schindler ,  Winfried Kuhrt ,  Guenter Weidenbach

    Inventor： Hermann Fischer ,  Hubert Schindler ,  Winfried Kuhrt ,  Guenter Weidenbach

    IPC: B01J2/08 ,  B01J21/04 ,  B01J35/08 ,  B01J37/00 ,  C01F7/02 ,  B01J21/12 ,  B01J23/72 ,  B01J23/86

    CPC classification number: B01J35/08 ,  B01J2/08 ,  B01J21/04 ,  B01J37/0018 ,  B01J37/0072

    Abstract: Disclosed is process for the preparation of alumina-containing particles, comprising the steps of (a) mixing an aluminum oxide hydrosol containing a hydrate of alumina or activated alumina and an additive component selected from a high molecular weight natural organic material which is insoluble in aqueous solution up to a temperature of 50.degree. C. and carbon with a solution of hydrolyzable base to form a mixture; (b) introducing the mixture in dispersed form into a water-immiscible liquid having a temperature of from about 60 to 100.degree. C., whereby gel particles are formed; (c) aging the gel particles in the liquid at the temperature and subsequently in an aqueous ammonia solution; (d) recovering the aged particles; and (e) calcining the recovered particles.

    Abstract translation: 公开了制备含氧化铝颗粒的方法，包括以下步骤：（a）将含有氧化铝或活性氧化铝水合物的氧化铝水溶胶与选自高分子量天然有机材料的添加剂组分混合，所述高分子量天然有机材料不溶于水 溶液至50℃，用可水解碱溶液形成碳，形成混合物; （b）将分散形式的混合物引入温度为约60至100℃的与水不混溶的液体中，由此形成凝胶颗粒; （c）在该温度下将凝胶颗粒老化并随后在氨水溶液中老化; （d）回收老化颗粒; 和（e）煅烧回收的颗粒。

    Uniform microspheroidal particle generating method
    24.
    发明授权
    Uniform microspheroidal particle generating method 失效
    均匀微球形成粒子的产生方法

    公开(公告)号：US3933679A

    公开(公告)日：1976-01-20

    申请号：US358410

    申请日：1973-05-08

    Applicant: William H. Weitzel ,  Lee D. La Grange

    Inventor： William H. Weitzel ,  Lee D. La Grange

    IPC: B01J2/02 ,  B01J2/08 ,  C09K3/00

    CPC classification number: B01J2/02 ,  B01J2/08

    Abstract: A method for preparing uniform, spherical microspheres from an aqueous liquid sol feed stock, particularly of a fertile and/or fissionable nuclear fuel material. In the method, a jetstream of the liquid feed stock is provided, uniformly periodic varicose instabilities are induced in the jetstream, a concurrent, caoxial stripping flow of inert fluid is provided surrounding the jetstream to enhance the varicose instabilities in order to cause the uniform dispersion of the jetstream into uniform spherical droplets, and the uniform droplets are subsequently solidified.The present invention is directed to methods for manufacturing uniform microspheres of inorganic materials, and more particularly, is directed to such methods for generating large numbers of small microspheres by sol-gel processes and to methods which are particularly suitable in the preparation of uniform solid microspheres of fertile or fissionable nuclear fuel materials.

    Abstract translation: 从水性液体溶胶原料，特别是可育和/或可裂变核燃料材料制备均匀的球形微球的方法。 在该方法中，提供液体原料的喷射流，在喷流中诱发均匀的周期性静脉曲张不稳定性，围绕喷流流动地提供惰性流体的并行脱水流动，以增强静脉曲张不稳定性，以产生均匀分散 的喷射流变成均匀的球形液滴，并且均匀的液滴随后被固化。

    Agglomeration of pigment particles and compositions utilizing same
    26.
    发明授权
    Agglomeration of pigment particles and compositions utilizing same 失效
    使用颜料颗粒和组合物的组合

    公开(公告)号：US3844811A

    公开(公告)日：1974-10-29

    申请号：US27668772

    申请日：1972-07-31

    Applicant: REPROGRAPHIC MATERIALS

    Inventor： BRYNKO C

    IPC: B01J2/08 ,  C09B67/20 ,  C09C1/58 ,  C09C3/04 ,  G03G9/093 ,  C08H17/02 ,  C09C1/04

    CPC classification number: G03G9/09392 ,  B01J2/08 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/52 ,  C01P2004/61 ,  C01P2004/80 ,  C09B67/006 ,  C09C1/58 ,  C09C3/045

    Abstract: Relatively spherical pigment particles of uniform size are obtained by mixing a coacervatable material with an aqueous dispersion of water insoluble pigment particles and an ionic surfactant causing coacervation of said system and effecting agglomeration of said pigment particles. The pigments can be agglomerated to any desired size and are useful in preparing toner compositions for electrophotography. Such toners comprise a core of said uniform substantially spherical pigment particles overcoated and substantially completely surrounded by a thermoplastic resinous coating.

    Abstract translation: 通过将可凝聚材料与水不溶性颜料颗粒的水性分散体和离子表面活性剂混合，从而产生均匀尺寸的相对球形的颜料颗粒，引起所述体系的凝聚并引起所述颜料颗粒的聚集。 颜料可以凝聚成任何所需的尺寸，并且可用于制备用于电子照相术的调色剂组合物。 这种调色剂包括所述均匀的基本上球形的颜料颗粒的芯，其包覆并基本上完全被热塑性树脂涂层包围。

    Method for the preparation of grains
    28.
    发明授权
    Method for the preparation of grains 失效
    制备谷物的方法

    公开(公告)号：US3717581A

    公开(公告)日：1973-02-20

    申请号：US3717581D

    申请日：1970-01-05

    Applicant: REACTOR CENTRUM NEDERLAND

    Inventor： NOOTHOUT A

    IPC: C01G56/00 ,  B01J2/08 ,  G21C3/62 ,  B01J13/00

    CPC classification number: B01J2/08 ,  G21C3/623 ,  Y02E30/38

    Abstract: A METHOD FOR PREPARING PARTICLES OF METAL HYDROXIDE GELS BY TREATING A CONCENTRATED AQUEOUS SOLUTION OF AT LEAST ONE HYDROLYZABLE METAL SALT, THE HYDROXIDE OF WHICH IS ONLY SLIGHTLY SOLUBLE IN WATER, SIMULTANEOUSLY WITH AMMONIA AND HEAT. THE SOLID SUBSTANCE THUS OBTAINED IS SEPARATED, WASHED AND HEATED THEREBY CONVERTING THE SOLID SUBSTANCE TO METAL OXIDE PARTICLES. THE HYDROLYZABLE METAL SALT STARTING MATERIALS ARE CONCENTRATED SOLUTIONS ANION-DEFICIENT METAL SALT SOLUTIONS, HAVING A RATIO OF CONJUGATED BASE TO METAL LOWER THAN THAT OF THE NORMAL SALT. WHEN A NITRATE-DEFENDANT URANYL NITRATE SOLUTION IS MIXED WIT AN AMMONIA-RELEASING AGENT, THEN DISPERSED IN A HOT PHASE IMMISCIBLE WITH THE AQUEOUS PHASE, THE RESULTING SOLIDIFICATION PRODUCES MICROSPHERES OF URANYL NITRATE, WHICH ARE USEFUL AS FUEL CELLS IN NUCLEAR REACTORS.

    Process for the production of bead-like catalyst supports for high mechanical stressing
    29.
    发明授权
    Process for the production of bead-like catalyst supports for high mechanical stressing 失效
    用于生产用于高机械压力的珠状催化剂支撑体的方法

    公开(公告)号：US3642659A

    公开(公告)日：1972-02-15

    申请号：US3642659D

    申请日：1969-05-21

    Applicant: BAYER AG

    Inventor： DORN LUDWIG ,  HEINZE GERHARD ,  PODSCHUS ERNST

    IPC: C01B17/79 ,  B01J2/08 ,  B01J21/16 ,  B01J23/22 ,  B01J37/00 ,  B01J11/82 ,  B01J11/40 ,  B01J11/44

    CPC classification number: B01J2/08 ,  B01J21/16 ,  B01J37/0072

    Abstract: POROUS, ABRASION-RESISTANT BEAD-LIKE CATALYST SUPPORTS FOR REACTIONS IN FLUIDISED BEDS CONTAINING IN A MATRIX OF A SILICON DIOXIDE GELMIXED WITH 0.1 TO 3% BY WEIGHT OF MAGNESIUM OXIDE A SILICON DIOXIDE FILLER WITH A SPECIFIC SURFACE AREA OF 20 TO 200 M.2/G. ACCORDING TO BET IN QUANTITIES OF FROM 20 TO 60% BY WEIGHT AND AN ARGILLACEOUS MINERAL FROM THE GROUP COMPRISING KAOLINITE, MONTMORILLONITE AND ATTAPULGITE IN QUANTITIES OF FROM 5 TO 30% BY WEIGHT, BOTH QUANTITIES BEING RELATED TO THE DRY GRANULATED MATERIAL. THE CATALYST SUPPORTS ARE OBTAINED BY SUSPENDING THE SILICON DIOXIDE FILLER AND THE ARGILLACEOUS MINERAL IN THE AFORESAID QUANTITIES IN AN AQUEOS, STABLE SILICON DIOXIDE SOL WITH A SPECIFIC SURFACE AREA OF 150 TO 400 M.2/G. ACCORDING TO BET AND GELLING THE LIQUID SUSPENSION BY THE ADDITION OF HYDRATED FINALLY DIVIDED MAGNESIUM OXIDE IN QUANTITIES OF 0.1 TO 3% BY WEIGHT AND FEEDING THIS GELLABLE MIXTURE IN DROPLET FORM INTO A LIQUID WHICH IS IMMISCIBLE WITH WATER AND FINALLY SEPARATING THE SULPHATED GRANULATED MATERIAL FROM THE LIQUID AND DRIVING AND HARDENING THE BEAD-LIKE GRANULATED MATERIAL FOR AT LEAST 10 MINUTES AT A TEMPERATURE OF FROM 500 TO 1000*C.

Patent Agency Ranking