公开(公告)号：US4956427A

公开(公告)日：1990-09-11

申请号：US289266

申请日：1988-12-23

申请人： John M. Jenkins, III ,  James D. McCullough, Jr. ,  Steven P. Sawin

发明人： John M. Jenkins, III ,  James D. McCullough, Jr. ,  Steven P. Sawin

IPC分类号： B01J8/26 ,  C08F2/00 ,  C08F2/34 ,  C08F10/00

CPC分类号： C08F2/004 ,  B01J8/26 ,  C08F10/00

摘要： A method for the prevention of fouling of metallic surfaces exposed to reactive alpha-olefin gases during the production of polymeric resins which comprise coating such metallic surfaces with an amino silicone fluid and thereafter curing said coating by hydrolysis to form a continuous solid coating.

公开(公告)号：US4954560A

公开(公告)日：1990-09-04

申请号：US373923

申请日：1989-06-30

申请人： Richard M. Gerkin ,  Michael W. Jorgenson ,  Paul W. Leuzzi, II

发明人： Richard M. Gerkin ,  Michael W. Jorgenson ,  Paul W. Leuzzi, II

IPC分类号： C08J9/02 ,  C08F291/08 ,  C08G18/50 ,  C08G18/63 ,  C08G18/81

CPC分类号： C08G18/632 ,  C08F291/08 ,  C08G18/636 ,  C08G18/638

摘要： A stable polymer polyol made by the in situ polymerization of two or more monomers in a polyol blend wherein at least one monomer is a bifunctional compound containing both an isocyanate group and an ethylinically unsaturated group and wherein the polyol blend contains a base polyol and an amine terminated polyether which is more reactive with the bifunctional compound than is the base polyol.

公开(公告)号：US4948771A

公开(公告)日：1990-08-14

申请号：US280981

申请日：1988-12-07

申请人： Francis G. Stakem

发明人： Francis G. Stakem

IPC分类号： C08F4/60 ,  C08F4/68 ,  C08F10/00 ,  C08F210/00 ,  C08F210/02

CPC分类号： C08F10/00

摘要： A catalyst composition comprising:(i) a complex comprised of V.sub.2 X.sub.3 (ED).sub.m and AlCl.sub.2 R.sub.2 whereinX=Cl, Br, or I, or mixtures thereofED=an electron donor, which is an ether, a phosphine, a ketone, an isocyanide, or an ester, said electron donor having 2 to 20 carbon atomsR=an alkyl having up to 14 carbon atomsm=an integer from 3 to 6,said complex impregnated into an inorganic oxide support;(ii) sufficient trialkylaluminum compound adsorbed on the inorganic oxide support to provide a molar ratio of adsorbed trialkylaluminum compound to vanadium of about 2.5:1 to about 10:1;(iii) a halocarbon promoter; and(iv) a hydrocarbyl aluminum cocatalyst.

公开(公告)号：US4943551A

公开(公告)日：1990-07-24

申请号：US796411

申请日：1985-11-08

申请人： Bernard D. Dombek

发明人： Bernard D. Dombek

IPC分类号： B01J23/78 ,  B01J23/83 ,  C07C29/154

CPC分类号： C07C29/154 ,  B01J23/78 ,  B01J23/83 ,  Y02P20/52

摘要： Catalyst composition for the production of methanol and higher saturated aliphatic alcohols from synthesis gas. The catalysts consist essentially of:(i) about 0.18 to about 0.81 mol fraction of copper;(ii) about 0.045 to about 0.54 mol fraction of thorium;(iii) up to about 0.54 mol fraction of zirconium; and(iv) about 0.01 to about 0.2 mol fraction of an alkali metal.

摘要翻译： 用于从合成气中生产甲醇和较高级饱和脂肪醇的催化剂组合物。 催化剂基本上由以下组成：（i）约0.18至约0.81摩尔份的铜; （ii）约0.045至约0.54摩尔份量的钍; （iii）至多约0.54摩尔份的锆; 和（iv）约0.01至约0.2摩尔碱金属的分数。

公开(公告)号：US4935550A

公开(公告)日：1990-06-19

申请号：US231508

申请日：1988-08-12

申请人： David J. Miller ,  David R. Bryant

发明人： David J. Miller ,  David R. Bryant

IPC分类号： B01D11/04 ,  B01J31/40 ,  B01J38/00 ,  C01G55/00 ,  C07B61/00 ,  C07C45/50 ,  C07C47/02

CPC分类号： B01J31/24 ,  B01J31/2404 ,  B01J31/2409 ,  B01J31/2414 ,  B01J31/4046 ,  C07C45/50 ,  B01J2231/321 ,  B01J2531/80 ,  B01J2531/822 ,  B01J2531/96 ,  B01J31/0201 ,  Y02P20/584

摘要： A method for recovering a transition metal, e.g., rhodium, from a non-polar organic solution containing non-polar organic solvent-soluble and polar solvent-insoluble coordination complex of the transition metal and a non-polar organic solvent-soluble and polar solvent-insoluble ligand, e.g., an organophosphorus ligand, by contacting the non-polar organic solution with a polar solution of an ionic organophosphine ligand, the transition metal then can be transferred back into a non-polar solution for reuse. In one embodiment rhodium is rendered amenable for back-extraction by treating the polar solution with a suitable conditioning reagent.

公开(公告)号：US4932865A

公开(公告)日：1990-06-12

申请号：US220303

申请日：1988-07-18

申请人： Paul R. Collins ,  Larry R. Rothrock

发明人： Paul R. Collins ,  Larry R. Rothrock

IPC分类号： A61C7/12 ,  A61K6/06

CPC分类号： A61C7/12

摘要： A sapphire orthodontic bracket with enhanced tolerance to fabrication, installation and use is fabricated such that the "r" planes of the sapphire are at substantially equal angles to the longitudinal axis of the arch wire groove of the bracket.

摘要翻译： 制造具有增强的制造，安装和使用耐受性的蓝宝石正畸托架，使得蓝宝石的“r”面与支架的拱形线槽的纵向轴线基本相等。

公开(公告)号：US4921026A

公开(公告)日：1990-05-01

申请号：US201567

申请日：1988-06-01

申请人： Robert N. Flagella ,  Howard J. Dawson

发明人： Robert N. Flagella ,  Howard J. Dawson

IPC分类号： C01B33/037 ,  C01B33/02 ,  C01B33/035 ,  C30B13/00 ,  C30B13/16 ,  C30B29/06

CPC分类号： C30B29/06 ,  C01B33/035 ,  C30B13/00

摘要： Polycrystalline silicon rod capable of providing within no more than two floating zoning passes, unicrystalline silicon exhibiting a resistivity of at least 10,000 ohm-cm (donor) and a lifetime of at least about 10,000 milliseconds, exhibits a copper X-ray diffraction pattern having a peak at 26.85.degree..+-.0.25.degree. (2 theta) and has less than 15 ppta boron and less than 20 ppta phosphorus.

公开(公告)号：US4920156A

公开(公告)日：1990-04-24

申请号：US592838

申请日：1984-03-23

申请人： Joseph V. Koleske ,  Claiborn L. Osborn

发明人： Joseph V. Koleske ,  Claiborn L. Osborn

IPC分类号： C08F16/00 ,  C08F2/48 ,  C08F2/50 ,  C08F16/12 ,  C08F16/22 ,  C08F220/36 ,  C08F234/02 ,  C08F290/00 ,  C08F299/00 ,  C08F299/06 ,  C09D5/00 ,  C09D175/14

CPC分类号： C08F234/02 ,  C08F220/36

摘要： Described herein are compositions suitable for photocopolymerization comprising a cyclic vinyl ether containing compound and urethane acrylates. Photocurable coatings can be prepared from such composition and such coatings have markedly improved flexibility and impact resistant properties.

摘要翻译： 本文描述了适用于光聚合的组合物，其包含含环状含乙烯基醚的化合物和氨基甲酸酯丙烯酸酯。 可光固化的涂层可以由这样的组合物制备，并且这种涂层具有明显改善的柔性和抗冲击性能。

公开(公告)号：US4917787A

公开(公告)日：1990-04-17

申请号：US39756

申请日：1987-04-16

申请人： Akinoobu Fukuhara ,  Gerard R. Kamm

发明人： Akinoobu Fukuhara ,  Gerard R. Kamm

IPC分类号： C10G9/38

CPC分类号： C10G9/38 ,  Y10S585/95

摘要： This invention relates to a method for on-line decoking of flame-cracking reactors whereby decoking is achieved without interruption of the normal operation of such reactors and without the necessity to change feed equipment and/or disassemble reactor components. While maintaining the temperature of the effluent at 1000.degree. C. to 2000.degree. C., the flow of the hydrocarbon feedstock in the reactor is periodically stopped for a time sufficient to reduce the carbon deposits to an acceptable level.

摘要翻译： 本发明涉及一种火焰裂解反应器的在线除焦方法，其中除焦是在不中断这种反应器的正常运行的情况下进行的，而不需要改变进料设备和/或拆卸反应器部件。 在将流出物的温度保持在1000℃至2000℃的同时，将反应器中的烃原料的流动周期性地停止足以将碳沉积物降低至可接受水平的时间。

公开(公告)号：US4908466A

公开(公告)日：1990-03-13

申请号：US102367

申请日：1987-09-29

申请人： James R. Nelson

发明人： James R. Nelson

IPC分类号： C07C201/02 ,  B01D3/00 ,  C07C67/00 ,  C07C201/00 ,  C07C201/04 ,  C07C203/00 ,  C07C203/02 ,  C07C203/04

CPC分类号： B01D3/009 ,  C07C201/04 ,  Y02P20/127

摘要： A process and reaction vessel for producing alkyl nitrite is disclosed the process comprising (a) contacting nitric oxide, lower alcohol and oxygen in a reaction zone such that alkyl nitrite is formed, said reaction zone comprising a reactor section and a rectification section, (b) supplying a liquid scrubbing agent to an upper portion of the rectification section, (c) withdrawing a gaseous alkyl nitrite product stream from the upper portion of the rectification section, and (d) withdrawing a liquid stream from a lower portion of the reactor section. The reactor section provides intimate vapor-liquid contact sufficient to enhance the conversion of nitric oxide to alkyl nitrite and the rectification section provides sufficient vapor residence time to enhance conversion of oxygen, as well as sufficient rectification capabilities to reduce the amounts of water and nitric acid in the gaseous alkyl nitrite product stream.