公开(公告)号：US07064222B2

公开(公告)日：2006-06-20

申请号：US11014379

申请日：2004-12-16

申请人： Irshad Ahmed

发明人： Irshad Ahmed

IPC分类号： C07D307/06 ,  C07D307/36

CPC分类号： C07D307/50 ,  C07D307/06 ,  C07D307/36

摘要： Processes are disclosed for the preparation of 2-methylfuran and 2-methyltetrahydrofuran. The continuous vapor-phase processes are commercially viable and efficient because they permit the preparation of 2-methylfuran and 2-methyltetrahydrofuran using commercially-available catalysts, namely, a reduced copper-based catalyst consisting essentially of cupric oxide, chromium (III) oxide, manganese oxide and barium chromate and a reduced nickel-based catalyst consisting essentially of nickel, nickel (II) oxide, aluminum oxide and silica. An apparatus comprising two inline hydrogenators is used for preparing the 2-methylfuran or 2-methyltetrahydrofuran.

公开(公告)号：US06852868B2

公开(公告)日：2005-02-08

申请号：US10225809

申请日：2002-08-21

申请人： Irshad Ahmed

发明人： Irshad Ahmed

IPC分类号： C07D307/06 ,  C07D307/36 ,  C07D307/44 ,  C07D307/12

CPC分类号： C07D307/50 ,  C07D307/06 ,  C07D307/36

摘要： Processes are disclosed for the preparation of 2-methylfuran and 2-methyltetrahydrofuran. The continuous vapor-phase processes are commercially viable and efficient because they permit the preparation of 2-methylfuran and 2-methyltetrahydrofuran using commercially-available catalysts, namely, a reduced copper-based catalyst consisting essentially of cupric oxide, chromium (III) oxide, manganese oxide and barium chromate and a reduced nickel-based catalyst consisting essentially of nickel, nickel (II) oxide, aluminum oxide and silica. An apparatus comprising two inline hydrogenators is used for preparing the 2-methylfuran or 2-methyltetrahydrofuran.

摘要翻译： 公开了制备2-甲基呋喃和2-甲基四氢呋喃的方法。 连续气相法是商业上可行的和有效的，因为它们允许使用市售催化剂制备2-甲基呋喃和2-甲基四氢呋喃，即基本上由氧化铜，氧化铬（III）， 氧化锰和铬酸钡以及基本上由镍，氧化镍（II），氧化铝和二氧化硅组成的还原的镍基催化剂。 包括两个在线氢化器的设备用于制备2-甲基呋喃或2-甲基四氢呋喃。

公开(公告)号：US06603026B2

公开(公告)日：2003-08-05

申请号：US09923644

申请日：2001-08-07

申请人： Gene E. Lightner

发明人： Gene E. Lightner

IPC分类号： C07D30746

CPC分类号： C07D307/44 ,  C07D307/50

摘要： Sugars derived from acidic hydrolysis of biomass consist of glucose and xyloses which are subjected to dehydration, within the hydrolysis environment, to form heterocyclic compounds, furfural and hydroxymethylfurfural. By providing a vessel for hydrolysis of biomass, a hydrolysate containing acid and heterocyclic compounds is formed. Upon withdrawing the hydrolysate from the vessel, and employment of separating means for removing heterocyclic compounds from the hydrolysate, a hydrolysate substantially devoid of heterocyclic compounds is provided for recycle to the vessel and will provide heterocyclic compounds. By withdrawing solids, containing lignins remaining from hydrolysis of biomass, from the vessel, and filtering the solids, to result in a filtrate for recycle to the vessel and provide filtered solids for subsequent processing. Thereby, heterocyclic compounds are derived from a biomass and withdrawn from the hydrolysis vessel, and solids, remaining from hydrolysis of biomass, are withdrawn from the hydrolysis vessel.

摘要翻译： 衍生自生物质酸性水解的糖由葡萄糖和木糖组成，在水解环境中脱水，形成杂环化合物，糠醛和羟甲基糠醛。 通过提供用于水解生物质的容器，形成含有酸和杂环化合物的水解产物。 当从容器中取出水解产物并使用从水解产物中除去杂环化合物的分离装置时，提供基本上不含杂环化合物的水解产物用于再循环到容器中并提供杂环化合物。 通过从容器中除去含有从生物质水解中残留的木质素并且过滤固体的固体，以产生用于再循环到容器中的滤液并提供过滤的固体用于后续处理。 因此，杂环化合物衍生自生物质并从水解容器中排出，并且从水解生物质中残留的固体从水解容器中排出。

公开(公告)号：US5788812A

公开(公告)日：1998-08-04

申请号：US488306

申请日：1995-06-07

申请人： Richard C. Agar ,  Jairo H. Lora ,  Malcolm Cronlund ,  Chih Fae Wu ,  Gopal C. Goyal ,  Stephen R. Winner ,  Mikhail N. Raskin ,  Raphael Katzen ,  Ron LeBlanc

发明人： Richard C. Agar ,  Jairo H. Lora ,  Malcolm Cronlund ,  Chih Fae Wu ,  Gopal C. Goyal ,  Stephen R. Winner ,  Mikhail N. Raskin ,  Raphael Katzen ,  Ron LeBlanc

IPC分类号： C07D307/50 ,  D21C3/20 ,  D21C11/00

CPC分类号： D21C3/20 ,  C07D307/50 ,  D21C11/0007

摘要： This invention provides for the recovery of lignin and other by-products from the pulping of fibrous plant material. In accordance with this invention, solvents and filtrates are recovered and recycled for reuse. This results in significant solvent and energy savings. Filtrates from the bleaching and delignification of the pulp are recycled for reuse in pulping, separation, and recovery of lignin and other by-products which results in significant energy savings and mitigation if not the elimination of pollution typically associated with bleaching. This invention also relates to products derived from the process and apparatus for carrying out the process. Lignins of various molecular weights and by-products of the pulping process are also recovered. The lignins are precipitated in high yields and at a high rate from a black liquor produced by pulping wood at high temperature and pressures. As a by-product of this process a purified furfural product is recovered. This furfural may be recycled for use in the recovery of the low molecular weight lignin of this process.

摘要翻译： 本发明提供从纤维植物材料的制浆中回收木质素和其它副产物。 根据本发明，回收溶剂和滤液并循环再利用。 这导致显着的溶剂和能量节省。 来自纸浆漂白和脱木质素的滤液被再循环用于制浆，分离和回收木质素和其它副产物，如果不消除通常与漂白相关的污染，则可以显着节能和减轻。 本发明还涉及从用于实施该方法的方法和装置得到的产物。 各种分子量的木质素和制浆过程的副产物也被回收。 木质素以高产率和高速率从由高温和高压制浆木浆产生的黑液中沉淀出来。 作为该方法的副产物，回收了纯化的糠醛产物。 该糠醛可以再循环用于回收该方法的低分子量木质素。

公开(公告)号：US4971657A

公开(公告)日：1990-11-20

申请号：US194032

申请日：1988-05-12

申请人： Gerard Avignon ,  Wolfgang Jaeggle ,  Horst Steinmuller ,  Thomas Steiner

发明人： Gerard Avignon ,  Wolfgang Jaeggle ,  Horst Steinmuller ,  Thomas Steiner

IPC分类号： C07D307/50 ,  D21C3/22

CPC分类号： C07D307/50 ,  D21C3/22

摘要： A process for the thermal and chemical treatment of lignocellulose-containing biomass and for the production of furfural and cellulose-containing fiber masses. In order to ensure a high yield of furfural:lignocellulose-containing biomass is continuously fed into a cooker containing a cooking liquor and, upon heating of the biomass in a heating zone and guidance of the heated biomass through a consecutive retention zone, cellulose or pretreated biomass is continuously withdrawn from the cooker,cooking liquor is continuously withdrawn from the cooker,the cooking liquor withdrawn is continuously fed to a furfural production plant, andthe cooking liquor at least largely freed from pentoses and furfural is continuously returned to the cooker, wherein heating may be effected by direct steam or via the cooking liquor.

摘要翻译： 一种用于热和化学处理含木素纤维素的生物质和用于生产含糠醛和纤维素的纤维块的方法。 为了确保高产量的糠醛：将含木素纤维素的生物质连续地供入含有蒸煮液的炊具中，并且在加热区中加热生物质并通过连续保留区引导加热的生物质，纤维素或预处理 生物质从炊具中连续取出，蒸煮液从炊具中连续取出，取出的蒸煮液被连续送入糠醛生产设备，至少大部分从戊糖和糠醛中除去的蒸煮液体连续返回到炊具，其中 加热可以通过直接蒸汽或通过蒸煮液进行。

公开(公告)号：US4401514A

公开(公告)日：1983-08-30

申请号：US245076

申请日：1981-03-18

申请人： Walter Kanzler ,  Johannes Schedler

发明人： Walter Kanzler ,  Johannes Schedler

IPC分类号： C07C51/44 ,  C07D307/50 ,  D21C11/00 ,  C07C51/48

CPC分类号： D21C11/0007 ,  C07C51/44 ,  C07D307/50 ,  Y10S203/06

摘要： A method of recovering or extracting chemicals, such as furfural, formic acid, acetic acid and other organic compounds from acidic hydrolysates of plants or vegetable matter, especially spent sulfite liquors after conversion of the pentosans into pentoses and then into furfural by heating the hydrolysate in an acidic environment. The conversion of the pentosans pentoses into furfural, preferably with acidulation, is accomplished in a counterflow or countercurrent flow heat exchanger and a reactor, preferably a tubular reactor. The hydrolysate which has additionally been heated and converted in the reactor is used as a heating medium or heat carrier for heating up the hydrolysate which is converted in the counterflow heat exchanger, whereupon there is recovered as the distillate furfural in conjunction with the formic acid, acetic acid and the like.

摘要翻译： 一种在将戊聚糖转化成戊糖后，从植物或植物物质的酸性水解产物，特别是废亚硫酸盐液中回收或提取化学物质如糠醛，甲酸和乙酸等有机化合物的方法，然后通过加热水解产物 酸性环境。 将戊聚糖戊糖转化成糠醛，优选酸化，是在逆流或逆流流动的热交换器和反应器，优选管式反应器中完成的。 在反应器中另外加热和转化的水解产物用作加热介质或热载体，用于加热在逆流热交换器中转化的水解产物，随后与甲酸一起作为馏出物糠醛回收， 乙酸等。

公开(公告)号：US2999783A

公开(公告)日：1961-09-12

申请号：US76383058

申请日：1958-09-29

申请人： HODOGAYA CHEMICAL CO LTD

发明人： TOMIO TERAI ,  TETSUYA TAKAMATSU

IPC分类号： C07D307/50 ,  D21C3/24

CPC分类号： D21C3/24 ,  C07D307/50

公开(公告)号：US2845441A

公开(公告)日：1958-07-29

申请号：US54726355

申请日：1955-11-16

申请人： BROWN CO

发明人： EMERSON MORSE ERWIN ,  HEARN WALTER L

IPC分类号： C07D307/50

CPC分类号： C07D307/50

公开(公告)号：US2725346A

公开(公告)日：1955-11-29

申请号：US44694054

申请日：1954-07-30

申请人： CUMBERLAND CORP

发明人： EDUARD FARBER

IPC分类号： C07D307/50 ,  C10B53/02

CPC分类号： C07D307/50 ,  C10B53/02 ,  Y02E50/14

公开(公告)号：US2140572A

公开(公告)日：1938-12-20

申请号：US8700036

申请日：1936-06-24

申请人： QUAKER OATS CO

发明人： BROWNLEE HAROLD J

IPC分类号： C07D307/50

CPC分类号： C07D307/50 ,  Y10S203/11