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公开(公告)号:US5925588A
公开(公告)日:1999-07-20
申请号:US182587
申请日:1998-10-28
申请人: Karl T. Chuang , Bing Zhou
发明人: Karl T. Chuang , Bing Zhou
CPC分类号: C01B15/029 , B01J21/18 , B01J23/40 , B01J23/44 , B01J35/0013 , B01J37/0211
摘要: The invention relates to hydrogen peroxide manufacture, and catalyst therefor, by direct oxidation of hydrogen with oxygen in an acidic aqueous medium. The catalyst includes a Group VIII metal on a partially hydrophobic, partially hydrophillic support, such as Pd on fluorinated carbon. Improvements in H.sub.2 O.sub.2 selectivity and catalyst stability are achieved by adding a source of sodium and chloride ions to the reaction medium and, in the case of a fluorinated carbon support, adding a source of fluoride ions.
摘要翻译: 本发明涉及过氧化氢制备及其催化剂,通过在酸性水性介质中用氧直接氧化氢。 该催化剂包括部分疏水的部分亲水性载体上的第Ⅷ族金属,例如氟化碳上的Pd。 通过向反应介质中加入钠离子和氯离子源,并在氟化碳载体的情况下加入氟离子源,可以实现H2O2选择性和催化剂稳定性的改善。
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公开(公告)号:US5770761A
公开(公告)日:1998-06-23
申请号:US744880
申请日:1996-11-08
申请人: Tzong-Bin Lin , Karl T. Chuang , Kun-Yung Tsai , Jen-Ray Chang
发明人: Tzong-Bin Lin , Karl T. Chuang , Kun-Yung Tsai , Jen-Ray Chang
CPC分类号: C07C67/40
摘要: Oxidation of liquid ethanol in the presence of excess liquid ethanol and a supported oxidation catalyst provides a one step process for production of ethyl acetate. The acetic acid produced in the oxidation is absorbed by the excess liquid ethanol, which esterifies to ethyl acetate. Ethyl acetate and water are removed from the process for separation of the ethyl acetate. The oxidation portion of process is preferred with a metallic oxidation catalyst on a hydrophobic support. The esterification portion of the process is preferred with an acidic solid ion exchange resin to promote the esterification. The process can be performed in series in separate steps, or preferably, in parallel in a single vessel, preferably a trickle bed reactor.
摘要翻译: 在过量的液态乙醇和负载的氧化催化剂的存在下,液态乙醇的氧化提供了生产乙酸乙酯的一步法。 在氧化中产生的乙酸被过量的液体乙醇吸收,其中酯化成乙酸乙酯。 从分离乙酸乙酯的方法中除去乙酸乙酯和水。 方法的氧化部分优选与疏水性载体上的金属氧化催化剂。 该方法的酯化部分优选与酸性固体离子交换树脂以促进酯化。 该方法可以在单独的步骤中串联进行,或者优选在单个容器,优选滴液床反应器中并行进行。
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公开(公告)号:US5387377A
公开(公告)日:1995-02-07
申请号:US94103
申请日:1993-07-27
申请人: Karl T. Chuang
发明人: Karl T. Chuang
IPC分类号: B01D3/18 , B01D3/00 , B01D3/26 , B01D11/04 , B01D47/14 , B01D53/18 , B01J8/02 , B01J19/30 , B01F3/04
CPC分类号: B01D53/185 , B01D11/043 , B01D3/008 , B01J19/305
摘要: An active liquid distributor containing, packed column wherein a casing contains perforated, active liquid frothing plates directly supporting packed beds filling the whole of the gas flow path in the casing. The total perforated, cross-sectional area, and the cross-sectional area of each perforation, for each plate is chosen to match the permeability of the packed beds so that the plates and packed beds contribute significantly to the gas/liquid contact thus greatly increasing the mass transfer efficiency of the packed column.
摘要翻译: PCT No.PCT / CA92 / 00049 Sec。 371日期:1993年7月27日 102(e)日期1993年7月27日PCT提交1992年2月5日PCT公布。 公开号WO92 / 13620 PCT 日期为1992年8月20日。一种活性液体分配器,其包含填充柱,其中壳体包含穿孔活性液体起泡板,其直接支撑填充壳体中整个气体流动路径的填充床。 选择每个板的每个穿孔的总穿孔,横截面积和横截面面积以匹配填充床的渗透性,使得板和填充床对气/液接触有显着贡献,从而大大增加 填充柱的传质效率。
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公开(公告)号:US20130165676A1
公开(公告)日:2013-06-27
申请号:US13332741
申请日:2011-12-21
IPC分类号: C07D301/14
CPC分类号: C07D303/04 , Y02P20/127 , Y02P20/582
摘要: A continuous epoxidation process for the production of high purity propylene oxide by the reaction of propylene with an oxidant that is a per-acid, such as peracetic acid (PAA), in a reactive distillation (RD) column. The RD column provides excellent heat integration and temperature control, and the process has the advantage of lower investment cost for capital equipment. The process operates at mild temperatures and pressures. A ferric acetylacetonate homogeneous catalyst and/or stabilizer may be included as part of the PAA feed to the process to increase PAA conversion and selectivity to propylene oxide. A pre-reactor can be incorporated upsteam of the RD column to increase the residence time at lower temperatures to enhance productivity.
摘要翻译: 在反应蒸馏(RD)柱中通过丙烯与过酸例如过乙酸(PAA)的氧化剂反应生产高纯度环氧丙烷的连续环氧化方法。 RD列提供优异的热集成和温度控制,该工艺具有降低资本设备投资成本的优点。 该过程在温和的温度和压力下运行。 乙酰丙酮铁的均匀催化剂和/或稳定剂可以作为PAA进料的一部分被包括以提高PAA转化率和对环氧丙烷的选择性。 可以将预反应器并入RD塔的上游,以增加在较低温度下的停留时间,以提高生产率。
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公开(公告)号:US06588736B1
公开(公告)日:2003-07-08
申请号:US09736094
申请日:2000-12-14
申请人: Karl T. Chuang , Adam T. Lee
发明人: Karl T. Chuang , Adam T. Lee
IPC分类号: B01F304
CPC分类号: B01D3/22
摘要: A gas/liquid contacting tray assembly is provided, including a perforated sheet and elongated cover strips arching over the perforations in the sheet. The cover strips have slots with liquid conveying strips in them for conveying liquid along the slots while mixing gas therewith. This reduces stagnant areas downstream of the cover strips, and sedimentation of solids in these areas, thus increasing the gas/liquid mixing and handling capacity while reducing the frequency of shut downs. A further slot, extending in the opposite direction to the one above, may be provided in the cover strip and have a conveying strip for conveying liquid mixed with gas to the other end of the cover strip and further reducing the formation of stagnant areas. The cover strips may taper inwardly width-wise in a downstream direction.
摘要翻译: 提供了一种气体/液体接触托盘组件,其包括穿孔片材和在片材中的穿孔上拱起的细长覆盖条带。 盖板带有槽,其中具有液体输送带,用于沿着槽口输送液体,同时与其一起混合气体。 这减少了盖板下游的停滞区域,以及这些区域中固体的沉降,从而提高了气/液混合和处理能力,同时降低了停机频率。 可以在盖条中设置另一个与上述相反的方向延伸的槽,并且具有用于将与气体混合的液体输送到盖带的另一端并进一步减少停滞区域的形成的输送带。 盖带可沿下游方向向内逐渐向内锥形。
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公开(公告)号:US06565071B2
公开(公告)日:2003-05-20
申请号:US09974528
申请日:2001-10-11
IPC分类号: B01F304
摘要: A liquid/gas contacting apparatus is provided wherein the perforated trays have an upper liquid repellent layer of a fluorocarbon polymer, to increase, and spread, liquid flow over the tray, and a rough underside for bursting any bubbles of any spray there against. Ridges are provided forming chevron patterns between perforations in the trays to deflect liquid towards the casing sides and remove sediment therefrom.
摘要翻译: 提供了一种液体/气体接触装置,其中多孔板具有氟碳聚合物的上部液体排斥层,以增加和扩散在该托盘上的液体流动,以及用于使任何喷雾的任何气泡爆裂的粗糙下侧。 在托盘中的穿孔之间形成人字形图形以将液体偏转到壳体侧面并从中移除沉积物。
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公开(公告)号:US5213719A
公开(公告)日:1993-05-25
申请号:US952098
申请日:1992-09-28
申请人: Karl T. Chuang
发明人: Karl T. Chuang
摘要: A gas-liquid contacting device is provided having increased gas-liquid flow rate capacity. Each perforated tray is provided with an upstream downcomer in addition to, and immediately adjacent to the conventional downcomer which in this device forms a downstream downcomer. The upstream downcomer is provided with a perforated plate sealing the lower end at a height above the froth of the tray below.
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公开(公告)号:US5210319A
公开(公告)日:1993-05-11
申请号:US844195
申请日:1992-03-02
申请人: Karl T. Chuang , Long Fu
发明人: Karl T. Chuang , Long Fu
IPC分类号: C07C51/25
CPC分类号: C07C51/25 , C07C51/252
摘要: A single step process for the oxidation of an olefin to its respective .alpha.-,.beta.-unsaturated carboxylic acid is described. The olefin in vapor form is reacted with oxygen in the presence of a noble metal oxidation catalyst on a hydrophobic support and an aqueous solvent.
摘要翻译: 描述了将烯烃氧化成其各自的α,β-不饱和羧酸的单步方法。 在贵金属氧化催化剂存在下,在疏水性载体和水性溶剂上使蒸气形式的烯烃与氧气反应。
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公开(公告)号:US5190668A
公开(公告)日:1993-03-02
申请号:US767818
申请日:1991-09-30
申请人: Karl T. Chuang
发明人: Karl T. Chuang
CPC分类号: C02F1/20 , B01D53/8668 , C02F1/02 , C02F1/725 , B01D2255/10
摘要: A process for removing volatile organic compounds such as methanol from wastewater comprising first stripping the organic compound from water and then oxidizing the organic compound in the gaseous phase using a hydrophobic catalyst, to form harmless reaction products.
摘要翻译: 从废水中除去挥发性有机化合物如甲醇的方法包括首先从水中汽提有机化合物,然后使用疏水催化剂氧化气相中的有机化合物,形成无害的反应产物。
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公开(公告)号:US5009872A
公开(公告)日:1991-04-23
申请号:US275188
申请日:1988-11-23
申请人: Karl T. Chuang , James B. McMonagle , Robert J. Quaiattini , William A. Seddon , David E. Clegg
发明人: Karl T. Chuang , James B. McMonagle , Robert J. Quaiattini , William A. Seddon , David E. Clegg
IPC分类号: B01J33/00 , A62D9/00 , B01D53/86 , B01D53/94 , B01J23/40 , B01J23/46 , B01J23/89 , B01J31/06
CPC分类号: B01J31/06 , B01D53/864 , B01D53/8668 , B01J23/40 , B01J23/892 , B01J23/8986 , B01J2231/70
摘要: A method is provided for oxidizing gases such as, for example, CO, aldehydes having carbon atoms in the range 1 to 5 (e.g. formaldehyde), ketones having carbon atoms in the range 3 to 5, and alcohols having carbon atoms in the range 1 to 5, wherein the gas at a relative humidity in the range 0 to 100% and an input temperature in the range -50.degree. to 150.degree. C. is contacted with a catalyst assembly comprising (a) a hydrophobic support having a surface area in the range 50 to 1,500 m.sup.2 /g and selected from the group consisting of silicalite, silylated silica, and styrene divinylbenzene polymers, and, on said support (b) a catalytically active metal selected from the group consisting of chromium, molybdenum, tungsten, manganese, rhenium, iron, ruthenium, osmium, cobalt, rhodium, platinum, iridium, nickel, copper and silver, said metal being present in an amount in the range 0.1 to 22 wt % of the total weight of the catalyst assembly. The catalyst assemblies used are generally catalytically active in the presence of liquid water and water vapor for longer periods than known catalyst assemblies and function at ambient temperatures.
摘要翻译: 提供了一种氧化气体的方法,例如CO,具有1至5范围内碳原子的醛(例如甲醛),碳原子在3至5范围内的酮,以及碳原子在1范围内的醇 至5,其中相对湿度在0至100%范围内的气体和-50℃至150℃的输入温度与催化剂组件接触,所述催化剂组件包括(a)疏水性载体,其表面积为 范围为50至1,500m2 / g,选自硅沸石,甲硅烷基化二氧化硅和苯乙烯二乙烯基苯聚合物,并且在所述载体(b)上,选自铬,钼,钨,锰的催化活性金属 铼,铁,钌,锇,钴,铑,铂,铱,镍,铜和银,所述金属的存在量为催化剂组合物总重量的0.1至22重量%。 所用的催化剂组合物在液态水和水蒸气存在下通常具有催化活性,比已知催化剂组件更长的时间段,并且在环境温度下起作用。
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