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公开(公告)号：US4822642A
公开(公告)日：1989-04-18
申请号：US119593
申请日：1987-11-12
摘要： A silicon diffusion coating is formed in the surface of a metal article by exposing the metal article to a reducing atmosphere followed by treatment in an atmosphere of 1 ppm to 100% by volume silane, balance hydrogen or hydrogen inert gas mixture. Hydrogen with a controlled dew point is utilized as a surface preparation agent and diluent for the silane.
摘要翻译： 通过将金属制品暴露于还原性气氛中，然后在1ppm至100体积％的硅烷，余量为氢气或氢气惰性气体混合物的气氛中进行处理，在金属制品的表面上形成硅扩散涂层。 具有受控露点的氢被用作表面处理剂和用于硅烷的稀释剂。
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公开(公告)号：US4714632A
公开(公告)日：1987-12-22
申请号：US807890
申请日：1985-12-11
摘要： A silicon diffusion coating is formed in the surface of a metal article by exposing the metal article to a reducing atmosphere followed by treatment in an atmosphere of 1 ppm to 100% by volume silane, balance hydrogen or hydrogen inert gas mixture. Hydrogen with a controlled dew point is utilized as a surface preparation agent and diluent for the silane.
摘要翻译： 通过将金属制品暴露于还原性气氛中，然后在1ppm至100体积％的硅烷，余量为氢气或氢气惰性气体混合物的气氛中进行处理，在金属制品的表面上形成硅扩散涂层。 具有受控露点的氢被用作表面处理剂和用于硅烷的稀释剂。
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3.发明授权Process for preparing sic protective films on metallic or metal impregnated substrates 失效在金属或金属浸渍基材上制备sic保护膜的方法
公开(公告)号：US4869929A
公开(公告)日：1989-09-26
申请号：US119119
申请日：1987-11-10
IPC分类号： C23C10/60
CPC分类号： C23C10/60
摘要： Silicon carbide protective films are produced on the surface of metallic or metal-impregnated substrates. A silicide or silicon diffusion coating is initially formed on the surface of the substrate, and subsequently said surface is treated with a gas stream which is reducing to the coating and substrate and contains a gaseous carbon source at a temperature greater than 500.degree. C.
摘要翻译： 在金属或金属浸渍的基材的表面上产生碳化硅保护膜。 最初在衬底的表面上形成硅化物或硅扩散涂层，随后所述表面用减少到涂层和衬底的气流进行处理，并在大于500℃的温度下含有气态碳源。
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公开(公告)号：US5064691A
公开(公告)日：1991-11-12
申请号：US488541
申请日：1990-03-02
IPC分类号： C23C12/00
CPC分类号： C23C12/00
摘要： The surface properties of iron or ferrous alloy are improved by borosiliconizing the surface by contact with a stream of reducing gas containing hydrogen, optionally with an inert gas, to which a gaseous halide or hydride of boron and silicon have been added, either together or sequentially. The temperature of treatment is elevated, e.g. above 350.degree. C., but below 1200.degree. C. Diffusion coatings of both boron and silicon are formed in the ferrous surface. Typical surces of boron and silicon inlude boron trichloride, diborane and silane.
摘要翻译： 铁或铁合金的表面性能通过与含有氢的还原气体流（任选地与惰性气体）接触来表面改性，其中已经加入了卤化物或硼和硅的氢化物，一起或顺序地 。 治疗的温度升高，例如 高于350℃，但低于1200℃。在铁表面形成硼和硅的扩散涂层。 典型的硼和硅不含三氯化硼，乙硼烷和硅烷。
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公开(公告)号：US4744837A
公开(公告)日：1988-05-17
申请号：US002841
申请日：1987-01-13
摘要： A process for bright annealing of chromium containing alloys such as stainless steels in an atmosphere of nitrogen and hydrogen containing controlled additions of an inhibitor as described in U.S. Pat. No. 4,334,938 wherein at least one element provided at the surface of the article being annealed in an amount such that it is oxidized in preference to the chromium in said article, whereby nitrogen uptake is inhibited and dulling of the metal surface by formation of a film containing chromium oxide is avoided.
摘要翻译： 在氮气和氢气气氛中对含铬合金如不锈钢进行光亮退火的方法，其含有受控添加的抑制剂，如美国专利No. 其中提供在制品表面处的至少一种元素被退火，其量使其优先于所述制品中的铬被氧化，由此通过形成膜来抑制氮吸收并使金属表面变钝 避免了含铬氧化铬。
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公开(公告)号：US5419891A
公开(公告)日：1995-05-30
申请号：US123458
申请日：1993-09-17
CPC分类号： B01D53/02 , B01D53/04 , B01J20/186 , B01D2253/108 , B01D2253/1085 , B01D2256/10 , B01D2257/10 , B01D2257/102 , B01D2259/40062 , B01D53/047 , Y10S423/21 , Y10S95/902
摘要： The present invention is directed to an at least binary exchanged X-zeolite having lithium and zinc cations in a ratio of preferably 5% to 40% zinc and 50% to 95% lithium, wherein the sum of the lithium and zinc ion exchange is at least 65% of the exchangeable ion content. Theses adsorbents are useful in a process for separating nitrogen from gas mixtures containing nitrogen and less strongly adsorbed components such as oxygen, hydrogen, argon or helium.
摘要翻译： 本发明涉及至少二元交换的X沸石，其具有优选5％至40％锌和50％至95％锂的锂和锌阳离子，其中锂和锌离子交换的总和为 至少65％的可交换离子含量。 这些吸附剂可用于从含有氮气和较弱吸附组分如氧气，氩气或氦气的气体混合物中分离氮气的方法。
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公开(公告)号：US5417957A
公开(公告)日：1995-05-23
申请号：US123498
申请日：1993-09-17
CPC分类号： B01D53/02 , B01D53/04 , B01J20/186 , B01D2253/108 , B01D2253/1085 , B01D2256/10 , B01D2257/10 , B01D2257/102 , B01D2259/40062 , B01D53/047 , Y10S423/21 , Y10S95/902
摘要： The present invention is directed to an at least binary exchanged X-zeolite having lithium and a divalent cation selected from the group consisting of cobalt, copper, chromium, iron, manganese, nickel and mixtures thereof in a ratio of preferably 5% to 50% of the divalent cation and 50% to 95% lithium. Theses adsorbents are useful in a process for separating nitrogen from gas mixtures containing nitrogen and less strongly adsorbed components such as oxygen, hydrogen, argon or helium.
摘要翻译： 本发明涉及具有锂和选自钴，铜，铬，铁，锰，镍及其混合物的二价阳离子的至少二元交换的X-沸石，其比例优选为5％至50％ 的二价阳离子和50％至95％的锂。 这些吸附剂可用于从含有氮气和较弱吸附组分如氧气，氩气或氦气的气体混合物中分离氮气的方法。
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公开(公告)号：US5258058A
公开(公告)日：1993-11-02
申请号：US956707
申请日：1992-10-05
CPC分类号： B01D53/02 , B01D53/04 , B01J20/186 , B01D2253/108 , B01D2253/1085 , B01D2256/10 , B01D2257/10 , B01D2257/102 , B01D2259/40062 , B01D53/047 , Y10S423/21 , Y10S95/902
摘要： The present invention is directed to a process for separating nitrogen from gas mixtures containing nitrogen and less strongly adsorbed components such as oxygen, hydrogen, argon or helium by use of an at least binary exchanged X-zeolite having lithium and a divalent cation selected from the group consisting of barium, cobalt, copper, chromium, iron, magnesium, manganese, nickel, zinc and mixtures thereof in a ratio of preferably 5% to 50% of the divalent cation and 50% to 95% lithium.
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公开(公告)号：US5152813A
公开(公告)日：1992-10-06
申请号：US811404
申请日：1991-12-20
CPC分类号： B01D53/02 , B01D53/04 , B01J20/186 , C01B13/027 , C01B21/0466 , B01D2253/108 , B01D2253/1085 , B01D2256/12 , B01D2257/102 , B01D2257/11 , C01B2210/0046 , Y10S95/902
摘要： The present invention is directed to a process for separating nitrogen from gas mixtures containing nitrogen and less strongly adsorbed components such as oxygen, hydrogen, argon or helium by use of an at least binary exchanged X-zeolite having lithium and calcium and/or strontium ions in ratio of preferably 5% to 50% calcium and/or strontium and 50% to 95% lithium.
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公开(公告)号：US5258060A
公开(公告)日：1993-11-02
申请号：US950120
申请日：1992-09-23
IPC分类号： B01D53/04 , B01D53/047 , B01J20/02 , B01J20/18
CPC分类号： B01D53/0476 , B01D53/047 , B01D2253/106 , B01D2253/108 , B01D2253/30 , B01D2256/12 , B01D2257/102 , B01D2259/40066 , B01D53/0462 , Y10S95/902
摘要： The present invention is directed to adsorptive separation of nitrogen with active adsorbent phases with high N.sub.2 capacity and high heats of adsorption when diluted with inert material at levels ranging from 5% to 80%. The presence of diluent reduces the temperature swings in the adsorbent bed, which increases the utilizable effective N.sub.2 working capacity and decreases the relative amount of O.sub.2 left unrecovered on the active adsorbent phase. The net result is equal or better process performance allowing utilization of a lower amount of active adsorbent phase. Use of a diluent having a higher heat capacity than that of the active adsorbent phase increases these benefits, but dilution effects are beneficial even for diluents with heat capacities equal to or lower than that of the active adsorbent phase.
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