公开(公告)号：US20050267318A1

公开(公告)日：2005-12-01

申请号：US10516923

申请日：2003-06-10

申请人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rosch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

发明人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rosch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

IPC分类号： B01J23/80 ,  C07B61/00 ,  C07C29/149 ,  C07C31/20 ,  C07C31/18

CPC分类号： C07C29/149 ,  C07C31/207

摘要： The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C4-dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 2 to 60 bar into a first reactor and catalytically hydrogenating it to a product which contains mainly optionally alkyl-substituted 7-butyrolactone; b) converting the product stream into the liquid phase; c) introducing the product stream obtained in this way into a second reactor at a temperature of from 100° C. to 240° C. and a pressure of from 20 to 250 bar and catalytically hydrogenating it in the liquid phase to optionally alkyl-substituted 1,4-butanediol; d) removing the desired product from by-products and any unconverted reactants; e) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages both using a catalyst which comprises ≦95% by weight, preferably from 5 to 95% by weight, in particular from 10 to 80% by weight, of CuO, and ≧5% by weight, preferably from 5 to 95% by weight, in particular from 20 to 90% by weight, of a support, said second reactor having a higher pressure than said first reactor, and the product mixture removed from said first reactor being introduced without further purification into said second reactor.

摘要翻译： 本发明涉及通过在具有下列物质的C 4 - 二羧酸和/或其衍生物的气相中通过两阶段催化氢化制备任选的烷基取代的1,4-丁二醇的方法 步骤：a）将200-300℃和2-60巴的C 4-14二羧酸或其衍生物的气流引入第一反应器，并将其催化氢化至 主要含有烷基取代的7-丁内酯的产物; b）将产物流转化成液相; c）将以这种方式获得的产物流在100℃至240℃的温度和20至250巴的压力下引入第二反应器，并将其在液相中催化氢化为任选的烷基取代的 1,4-丁二醇 d）从副产物和任何未转化的反应物中除去所需的产物; e）任选地将未转化的中间体再循环到一个或两个氢化阶段中，所述氢化步骤均使用包含<= 95重量％，优选5至95重量％，特别是10至80重量％的CuO ，和> = 5重量％，优选5至95重量％，特别是20至90重量％的载体，所述第二反应器具有比所述第一反应器更高的压力，并将产物混合物从 所述第一反应器不经进一步纯化地引入所述第二反应器。

公开(公告)号：US20060167323A1

公开(公告)日：2006-07-27

申请号：US10516922

申请日：2003-06-11

申请人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rosch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

发明人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rosch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

IPC分类号： C07C31/18

CPC分类号： C07C29/149 ,  C07C31/207

摘要： The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C4-dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 2 to 60 bar into a first reactor and catalytically hydrogenating it in the gas phase to a product which contains mainly optionally alkyl-substituted γ-butyrolactone; b) removing succinic anhydride from the product obtained in step a), preferably to a residual level of from

摘要翻译： 本发明涉及通过在具有下列物质的C 4 - 二羧酸和/或其衍生物的气相中通过两阶段催化氢化制备任选的烷基取代的1,4-丁二醇的方法 步骤：a）将200-300℃和2-60巴的C 4-14二羧酸或其衍生物的气流引入第一反应器，并将其催化氢化为 气相至主要含有烷基取代的γ-丁内酯的产物; b）从步骤a）中获得的产物中除去琥珀酸酐，优选残留量为约0.3至0.2重量％; c）将步骤b）中获得的产物流在150℃至240℃的温度和15至100巴的压力下引入第二反应器，并将其在气相中催化氢化为任选的烷基 - 取代的1,4-丁二醇; d）从中间体，副产物和任何未转化的反应物中除去所需的产物; e）任选地将未转化的中间体再循环到一个或两个氢化步骤中，所述氢化步骤各自使用催化剂，所述催化剂包含95重量％，优选5至95重量％，特别是10至80重量％的CuO ，和> = 5重量％，优选5至95重量％，特别是20至90重量％的氧化载体，并且所述第二反应器具有比所述第一反应器更高的压力。

公开(公告)号：US20050258025A1

公开(公告)日：2005-11-24

申请号：US10505774

申请日：2003-02-28

申请人： Gunther Windecker ,  Alexander Weck ,  Rolf-Hartmuth Fischer ,  Markus Rosch ,  Nils Bottke ,  Michael Hesse ,  Stephan Schlitter ,  Holger Borchert

发明人： Gunther Windecker ,  Alexander Weck ,  Rolf-Hartmuth Fischer ,  Markus Rosch ,  Nils Bottke ,  Michael Hesse ,  Stephan Schlitter ,  Holger Borchert

IPC分类号： B01D3/14 ,  C07D307/08 ,  B01D3/38

CPC分类号： B01D3/146 ,  C07D307/08 ,  Y10S203/20

摘要： The present invention provides a process for distillatively purifying crude water-containing tetrahydrofuran by passing the crude tetrahydrofuran through three distillation columns, withdrawing water from the bottom of the first column, recycling water-containing tetrahydrofuran from the top of the second column into the first column, passing a sidestream of the first column into the second column, recycling the bottom product of the third column into the first column, and withdrawing a distillate at the top of the first column, which comprises passing a sidestream of the second column into the third column and recovering the pure tetrahydrofuran as the top product of the third column.

摘要翻译： 本发明提供了一种通过将粗四氢呋喃通过三个蒸馏塔，从第一塔的底部排出水，将含水四氢呋喃从第二塔的顶部再循环到第一塔中来蒸馏精制含粗水的四氢呋喃的方法 将第一塔的侧流通入第二塔，将第三塔的底部产物再循环到第一塔中，并且抽出第一塔顶部的馏出物，其包括将第二塔的侧流通入第三塔的第三塔 并回收纯四氢呋喃作为第三列的顶级产物。

公开(公告)号：US20050182281A1

公开(公告)日：2005-08-18

申请号：US10517263

申请日：2003-06-10

申请人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rosch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

发明人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rosch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

IPC分类号： C07B61/00 ,  C07C29/149 ,  C07C31/20 ,  C07C31/18

CPC分类号： C07C29/149 ,  Y02P20/582 ,  C07C31/207

摘要： The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C4-dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 10 to 100 bar into a first reactor or into a first reaction zone of a reactor and catalytically hydrogenating it in the gas phase to a product which contains mainly optionally alkyl-substituted y-butyrolactone; b) introducing the product stream obtained in this way into a second reactor or into a second reaction zone of a reactor at a temperature of from 140° C to 260° C. and catalytically hydrogenating it in the gas phase to optionally alkyl-substituted 1,4-butanediol; steps a) and b) being carried out at the same pressure; c) removing the desired product from intermediates, by-products and any unconverted reactants; d) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages each using a catalyst which comprises ≦95% by weight, preferably from 5 to 95% by weight, in particular from 10 to 80% by weight, of CuO, and ≧5% by weight, preferably from 5 to 95% by weight, in particular from 20 to 90% by weight, of an oxidic support, and the product mixture removed from the first hydrogenation stage being introduced without further purification into the second hydrogenation stage.

摘要翻译： 本发明涉及通过在具有下列物质的C 4 - 二羧酸和/或其衍生物的气相中通过两阶段催化氢化制备任选的烷基取代的1,4-丁二醇的方法 步骤：a）将200-300℃和10-100巴的C 4-14二羧酸或其衍生物的气流引入第一反应器或第一反应 并将其在气相中催化氢化成主要包含烷基取代的γ-丁内酯的产物; b）将以这种方式获得的产物流引入第二反应器或反应器的第二反应区，温度为140℃至260℃，并将其在气相中催化氢化为任选烷基取代的1 ，4-丁二醇; 步骤a）和b）在相同的压力下进行; c）从中间体，副产物和任何未转化的反应物中除去所需的产物; d）任选地将未转化的中间体再循环到一个或两个氢化阶段中，所述氢化阶段各自使用包含<= 95重量％，优选5至95重量％，特别是10至80重量％的CuO ，和> = 5重量％，优选5至95重量％，特别是20至90重量％的氧化载体，并将从第一氢化步骤除去的产物混合物不经进一步纯化引入到 第二加氢阶段。

公开(公告)号：US20050119494A1

公开(公告)日：2005-06-02

申请号：US10505706

申请日：2003-02-28

申请人： Rolf-Hartmuth Fischer ,  Markus Rosch ,  Nils Bottke ,  Alexander Weck ,  Gunther Windecker ,  Michael Hesse ,  Holger Borchert ,  Stephan Schlitter

发明人： Rolf-Hartmuth Fischer ,  Markus Rosch ,  Nils Bottke ,  Alexander Weck ,  Gunther Windecker ,  Michael Hesse ,  Holger Borchert ,  Stephan Schlitter

IPC分类号： B01J23/72 ,  B01J23/80 ,  C07B61/00 ,  C07D207/26 ,  C07D207/267 ,  C07D307/08 ,  C07D307/02

CPC分类号： C07D207/267 ,  C07D307/08

摘要： A process for coproducing alkyl-substituted or unsubstituted THF and pyrrolidones by catalytically hydrogenating C4-dicarboxylic acids and/or derivatives thereof in the gas phase in the presence of copper catalysts and reacting GBL with ammonia or primary amines to give pyrrolidones comprises a) hydrogenating C4-dicarboxylic acids and/or derivatives thereof in the gas phase at from 200 to 300° C., from 0.1 to 100 bar, catalyst hourly space velocities of from 0.01 to 1 kg of reactant/l of catalyst*hour and reactant/hydrogen molar ratios of from 20 to 800 in the presence of catalysts comprising copper, aluminum and/or zinc to give mixtures of THF and GBL, b) separating the hydrogenation effluent obtained by distillation into a THF/water mixture as the top product and a GBL-containing bottom product, c) separating the THF/water mixture from step b) in a distillation facility consisting of three columns by withdrawing water from the bottom of the first column, recycling water-containing THF from the second into the first column, passing a side stream of the first into the second column, recycling the bottom product of the third column into the first column and withdrawing a distillate at the top of the first column, wherein a side stream of the second column is passed into the third column and the pure THF is obtained as the top product of the third column, d) recovering GBL from the GBL-containing bottom product from step b) by distillation and e) reacting the GBL obtained with ammonia or amines to give corresponding pyrrolidones.

摘要翻译： 在铜催化剂存在下，在气相中催化氢化C 4 - 二羧酸和/或其衍生物，共同生产烷基取代或未取代的THF和吡咯烷酮的方法，并使GBL与氨或伯胺 得到吡咯烷酮包括：a）在200-300℃，0.1-100巴的气相中氢化C 4-14 - 二羧酸和/或其衍生物，催化剂小时空速为0.01 在包含铜，铝和/或锌的催化剂存在下，至1kg反应物/ l催化剂*小时和反应物/氢摩尔比为20至800，得到THF和GBL的混合物，b）分离所得氢化流出物 通过蒸馏作为顶部产物的THF /水混合物和含有GBL的底部产物，c）通过从第一塔底部排出水分离由三塔组成的蒸馏设备中的步骤b）中的THF /水混合物 ，回收 将含水THF从第二塔进入第一塔，将第一塔的侧流通入第二塔，将第三塔的底部产物再循环到第一塔中并抽出第一塔顶部的馏出物，其中 将第二塔的侧流进入第三塔，得到纯THF作为第三塔的顶部产物，d）通过蒸馏从步骤b）的含GBL的底部产物中回收GBL，和e）使 用氨或胺得到GBL，得到相应的吡咯烷酮。

公开(公告)号：US07351311B2

公开(公告)日：2008-04-01

申请号：US10505774

申请日：2003-02-28

申请人： Gunther Windecker ,  Alexander Weck ,  Rolf-Hartmuth Fischer ,  Markus Rösch ,  Nils Bottke ,  Michael Hesse ,  Stephan Schlitter ,  Holger Borchert

发明人： Gunther Windecker ,  Alexander Weck ,  Rolf-Hartmuth Fischer ,  Markus Rösch ,  Nils Bottke ,  Michael Hesse ,  Stephan Schlitter ,  Holger Borchert

IPC分类号： B01D3/14 ,  C07D307/08

CPC分类号： B01D3/146 ,  C07D307/08 ,  Y10S203/20

摘要： Crude water-containing tetrahydrofuran is purified by passing the crude tetrahydrofuran through three distillation columns, withdrawing water from the bottom of the first column, recycling water-containing tetrahydrofuran from the top of the second column into the first column, passing a sidestream of the first column into the second column, recycling the bottom product of the third column into the first column, and withdrawing a distillate at the top of the first column. Additionally, a sidestream of the second column is passed into the third column and the purified tetrahydrofuran is recovered as the top product of the third column.

摘要翻译： 通过将粗四氢呋喃通过三个蒸馏塔，从第一塔的底部排出水，将含水四氢呋喃从第二塔的顶部再循环到第一塔中，将第一个塔 塔进入第二列，将第三塔的底部产物回收到第一塔中，并且抽出第一塔顶部的馏出物。 此外，将第二塔的侧流送入第三塔，回收纯化的四氢呋喃作为第三塔的顶部产物。

公开(公告)号：US07271299B2

公开(公告)日：2007-09-18

申请号：US10516922

申请日：2003-06-11

申请人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rösch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

发明人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rösch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

IPC分类号： C07C31/18

CPC分类号： C07C29/149 ,  C07C31/207

摘要： Optionally alkyl-substituted 1,4-butanediol is prepared from C4-dicarboxylic acids and/or of derivatives thereof by: a) a gas stream of the C4-dicarboxylic acid or the derivative thereof in a first reactor in the gas phase to obtain a product which contains mainly optionally alkyl-substituted γ-butyro-lactone; b) removing succinic anhydride from the product of step a); c) catalytically hydrogenating the product of step b) in a second reactor in the gas phase to obtain optionally alkyl-substituted 1,4-butanediol; d) removing the desired product from intermediates, by-products and any unconverted reactants; and e) optionally recycling unconverted intermediates into one or both hydrogenation stages. The catalysts employed in each of the hydrogenation stages comprise ≦95% by weight of CuO, and ≦5% by weight of an oxidic support, and the second reactor has a higher pressure than the first reactor.

摘要翻译： 任选地，烷基取代的1,4-丁二醇由C 4-14二羧酸和/或其衍生物通过以下方法制备：a）引入C 4 - 二羧酸或其衍生物在气相中的第一反应器中，以获得主要含有烷基取代的γ-丁内酯的产物; b）从步骤a）的产物中除去琥珀酸酐; c）在气相中的第二反应器中催化氢化步骤b）的产物以获得任选的烷基取代的1,4-丁二醇; d）从中间体，副产物和任何未转化的反应物中除去所需的产物; 和e）任选地将未转化的中间体再循环到一个或两个氢化阶段。 在每个氢化阶段中使用的催化剂包含<95重量％的CuO和<= 5重量％的氧化载体，并且第二反应器具有比第一反应器更高的压力。

公开(公告)号：US07169958B2

公开(公告)日：2007-01-30

申请号：US10516923

申请日：2003-06-10

申请人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rösch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

发明人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rösch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

IPC分类号： C07C29/132 ,  C07C29/149 ,  C07C29/136 ,  C07C29/147

CPC分类号： C07C29/149 ,  C07C31/207

摘要： The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C4-dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 2 to 60 bar into a first reactor and catalytically hydrogenating it to a product which contains mainly optionally alkyl-substituted γ-butyrolactone; b) converting the product stream into the liquid phase; c) introducing the product stream obtained in this way into a second reactor at a temperature of from 100° C. to 240° C. and a pressure of from 20 to 250 bar and catalytically hydrogenating it in the liquid phase to optionally alkyl-substituted 1,4-butanediol; d) removing the desired product from by-products and any unconverted reactants; e) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages both using a catalyst which comprises ≦95% by weight, preferably from 5 to 95% by weight, in particular from 10 to 80% by weight, of CuO, and ≧5% by weight, preferably from 5 to 95% by weight, in particular from 20 to 90% by weight, of a support, said second reactor having a higher pressure than said first reactor, and the product mixture removed from said first reactor being introduced without further purification into said second reactor.

摘要翻译： 本发明涉及通过在具有下列物质的C 4 - 二羧酸和/或其衍生物的气相中通过两阶段催化氢化制备任选的烷基取代的1,4-丁二醇的方法 步骤：a）将200-300℃和2-60巴的C 4-14二羧酸或其衍生物的气流引入第一反应器，并将其催化氢化至 主要含烷基取代的γ-丁内酯的产品; b）将产物流转化成液相; c）将以这种方式获得的产物流在100℃至240℃的温度和20至250巴的压力下引入第二反应器，并将其在液相中催化氢化为任选的烷基取代的 1,4-丁二醇 d）从副产物和任何未转化的反应物中除去所需的产物; e）任选地将未转化的中间体再循环到一个或两个氢化阶段中，所述氢化步骤均使用包含<= 95重量％，优选5至95重量％，特别是10至80重量％的CuO ，和> = 5重量％，优选5至95重量％，特别是20至90重量％的载体，所述第二反应器具有比所述第一反应器更高的压力，并将产物混合物从 所述第一反应器不经进一步纯化地引入所述第二反应器。

公开(公告)号：US07193091B2

公开(公告)日：2007-03-20

申请号：US10505706

申请日：2003-02-28

申请人： Rolf-Hartmuth Fischer ,  Markus Rösch ,  Nils Bottke ,  Alexander Weck ,  Gunther Windecker ,  Michael Hesse ,  Holger Borchert ,  Stephan Schlitter

发明人： Rolf-Hartmuth Fischer ,  Markus Rösch ,  Nils Bottke ,  Alexander Weck ,  Gunther Windecker ,  Michael Hesse ,  Holger Borchert ,  Stephan Schlitter

IPC分类号： C07D207/267 ,  C07D307/02

CPC分类号： C07D207/267 ,  C07D307/08

摘要： A process for coproducing alkyl-substituted or unsubstituted THF and pyrrolidones by catalytically hydrogenating C4-dicarboxylic acids and/or derivatives thereof in the gas phase in the presence of copper catalysts and reacting GBL with ammonia or primary amines to give pyrrolidones.

摘要翻译： 在铜催化剂存在下，在气相中催化氢化C4-二羧酸和/或其衍生物，共同生产烷基取代或未取代的THF和吡咯烷酮的方法，并使GBL与氨或伯胺反应得到吡咯烷酮。

公开(公告)号：US07154011B2

公开(公告)日：2006-12-26

申请号：US10517263

申请日：2003-06-10

申请人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rösch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

发明人： Michael Hesse ,  Stephan Schlitter ,  Holger Borchert ,  Markus Schubert ,  Markus Rösch ,  Nils Bottke ,  Rolf-Hartmuth Fischer ,  Alexander Weck ,  Gunther Windecker ,  Gunnar Heydrich

IPC分类号： C07C29/149

CPC分类号： C07C29/149 ,  Y02P20/582 ,  C07C31/207

摘要： The present invention relates to a process for preparing optionally alkyl-substituted 1,4-butanediol by two-stage catalytic hydrogenation in the gas phase of C4-dicarboxylic acids and/or of derivatives thereof having the following steps: a) introducing a gas stream of a C4-dicarboxylic acid or of a derivative thereof at from 200 to 300° C. and from 10 to 100 bar into a first reactor or into a first reaction zone of a reactor and catalytically hydrogenating it in the gas phase to a product which contains mainly optionally alkyl-substituted γ-butyrolactone; b) introducing the product stream obtained in this way into a second reactor or into a second reaction zone of a reactor at a temperature of from 140° C. to 260° C. and catalytically hydrogenating it in the gas phase to optionally alkyl-substituted 1,4-butanediol; steps a) and b) being carried out at the same pressure; c) removing the desired product from intermediates, by-products and any unconverted reactants; d) optionally recycling unconverted intermediates into one or both hydrogenation stages, said hydrogenation stages each using a catalyst which comprises ≦95% by weight, preferably from 5 to 95% by weight, in particular from 10 to 80% by weight, of CuO, and ≧5% by weight, preferably from 5 to 95% by weight, in particular from 20 to 90% by weight, of an oxidic support, and the product mixture removed from the first hydrogenation stage being introduced without further purification into the second hydrogenation stage.

摘要翻译： 本发明涉及通过在具有下列物质的C 4 - 二羧酸和/或其衍生物的气相中通过两阶段催化氢化制备任选的烷基取代的1,4-丁二醇的方法 步骤：a）将200-300℃和10-100巴的C 4-14二羧酸或其衍生物的气流引入第一反应器或第一反应 并将其在气相中催化氢化成主要包含烷基取代的γ-丁内酯的产物; b）将以这种方式获得的产物流在140℃至260℃的温度下引入第二反应器或反应器的第二反应区，并将其在气相中催化氢化为任选的烷基取代的 1,4-丁二醇 步骤a）和b）在相同的压力下进行; c）从中间体，副产物和任何未转化的反应物中除去所需的产物; d）任选地将未转化的中间体再循环到一个或两个氢化阶段中，所述氢化阶段各自使用包含<= 95重量％，优选5至95重量％，特别是10至80重量％的CuO ，和> = 5重量％，优选5至95重量％，特别是20至90重量％的氧化载体，并将从第一氢化步骤除去的产物混合物不经进一步纯化引入到 第二加氢阶段。