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公开(公告)号：US6137015A
公开(公告)日：2000-10-24
申请号：US206888
申请日：1998-12-08
CPC分类号： C07C29/106 , Y02P20/52
摘要： A process for preparing alkylene glycols including reacting an alkylene oxide with water in the presence of a combination of additives and an anion exchange resin, wherein the combination of additives comprises carbon dioxide and an organic or inorganic base provided in an amount sufficient to maintain a pH of the reaction mixture between about 5.0 and 9.0, with the proviso that, when the base is bicarbonate or carbonate, then the anion exchange resin is a trimethyl benzyl ammonium anion exchange resin. A particularly preferred method of this invention is to react ethylene oxide with water in the presence of a halogenate or bicarbonate-type anionic exchange resin (such as a DOWEX.TM. MSA-1 type resin), carbon dioxide, and sodium hydroxide. Some advantages of this invention are that it provides desirable catalyst lifetime and activity, minimizes resin swelling, and provides a desirable, sustained selectivity to alkylene glycol.
摘要翻译： 一种制备亚烷基二醇的方法，包括在添加剂和阴离子交换树脂的组合的存在下使烯化氧与水反应，其中添加剂的组合包括二氧化碳和提供足够量以保持pH的有机或无机碱 的反应混合物为约5.0至9.0，条件是当碱为碳酸氢盐或碳酸盐时，阴离子交换树脂为三甲基苄基铵阴离子交换树脂。 本发明特别优选的方法是在卤化物或碳酸氢根离子交换树脂（如DOWEX TM MSA-1型树脂），二氧化碳和氢氧化钠的存在下使环氧乙烷与水反应。 本发明的一些优点是其提供所需的催化剂寿命和活性，使树脂溶胀最小化，并为亚烷基二醇提供期望的持续选择性。
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公开(公告)号：US06211419B1
公开(公告)日：2001-04-03
申请号：US09557526
申请日：2000-04-24
IPC分类号： C07C2700
CPC分类号： C07C29/106 , C07C31/202 , C07C31/205 , C07C31/207
摘要： A method for operating an epoxide containing system which contains a catalyst is disclosed. The method comprises feeding carbon dioxide to the epoxide containing system at an amount of from 0.01 to 5.0 weight percent; and maintaining the epoxide containing system at a temperature of from 100° C. to 150° C. The catalyst has a half life of at least 40 days at 120° C. The present invention allows anion exchange resins in the bicarbonate form to be used for the hydrolysis of ethylene oxide at temperatures exceeding 100° C. The rate of catalyst swelling is minimized and lifetime of the catalyst enhanced.
摘要翻译： 公开了含有催化剂的含环氧化物体系的操作方法。 该方法包括以0.01至5.0重量％的量将二氧化碳供给含环氧化物的体系; 并将含环氧化物的体系保持在100℃至150℃的温度。催化剂在120℃下的半衰期至少为40天。本发明允许使用碳酸氢盐形式的阴离子交换树脂 用于在超过100℃的温度下水解环氧乙烷。催化剂溶胀速率最小化，催化剂寿命增加。
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公开(公告)号：US06160187A
公开(公告)日：2000-12-12
申请号：US207724
申请日：1998-12-08
CPC分类号： C07C29/106 , Y02P20/124 , C07C31/202 , C07C31/205
摘要： A method for making glycol in an adiabatic reactor system including feeding water and an epoxide into at least one adiabatic reactor under conditions such that epoxide and the water react to form a glycol product stream. The adiabatic reactor contains a catalyst bed which undergoes swelling during its useful lifetime, and the adiabatic reactor operates under conditions sufficient to reduce the rate of catalyst swelling relative to a non-adiabatic reactor system. Other aspects of the invention include the combination of splitting the feed between multiple adiabatic reactors in combination with the cross exchange of heat between feeds and products with heat exchangers, such that an energy efficient process that provides long catalyst stability and minimal catalyst swelling results.
摘要翻译： 一种在绝热反应器系统中制备二醇的方法，包括在环氧化物和水反应形成二醇产物流的条件下将水和环氧化物加入到至少一个绝热反应器中。 绝热反应器包含在其使用寿命期间经历膨胀的催化剂床，并且绝热反应器在足以降低相对于非绝热反应器系统的催化剂膨胀速率的条件下运行。 本发明的其它方面包括将多个绝热反应器之间的进料分开与进料和具有热交换器的产物之间的交叉热交换的组合，使得提供长的催化剂稳定性和最小的催化剂溶胀的能量有效的方法。
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公开(公告)号：US5718810A
公开(公告)日：1998-02-17
申请号：US618640
申请日：1996-03-19
申请人： Lanny A. Robbins , Von G. Landon
发明人： Lanny A. Robbins , Von G. Landon
CPC分类号： D21C11/0007 , B01D3/146 , B01D3/40 , D21C11/06 , Y10S203/24
摘要： A method for recovering methanol from sulfur-based wood pulping process vapors, which contain at least methanol and dimethyl disulfide. The method involves three steps. The first step consists of introducing the vapors into a first distillation tower at a vapor introduction point. The second step consists of introducing water into the first tower at a point above the vapor introduction point. The third step consists of heating liquid which is in the first tower below the vapor introduction point so that a liquid stream flows from the bottom of the first tower and a gas stream flows from the top of the first tower. The liquid stream contains most of the methanol originally in the vapors. The gas stream contains most of the dimethyl disulfide originally in the vapors. The liquid stream can then be distilled in a second distillation tower by conventional distillation to produce dry methanol. The first and third steps can be combined by introducing sufficiently heated vapors. When the vapors contain more than sixty percent water, then there need be only two steps. The first step consists of introducing the vapors into a first distillation tower at a vapor introduction point. The second step consists of heating liquid which is in the first tower below the vapor introduction point so that a liquid stream flows from the bottom of the first tower and a gas stream flows from the top of the first tower.
摘要翻译： 从基于硫的木材制浆工艺蒸气中回收甲醇的方法，其至少含有甲醇和二甲基二硫化物。 该方法涉及三个步骤。 第一步是将蒸汽引入蒸汽引入点的第一蒸馏塔。 第二步是在蒸汽引入点上方的一点将水引入第一塔。 第三步骤是将第一塔内的加热液体加热到蒸汽导入点以下，使得液体流从第一塔的底部流出，气流从第一塔的顶部流出。 液体物流最初含有蒸气中的大部分甲醇。 原料气体中含有大部分二甲基二硫化物。 然后可以通过常规蒸馏在第二蒸馏塔中蒸馏液体流以产生干燥的甲醇。 通过引入充分加热的蒸气可以组合第一和第三步骤。 当蒸气含有百分之六十以上的水时，则只需要两步。 第一步是将蒸汽引入蒸汽引入点的第一蒸馏塔。 第二步骤是将第一塔内的加热液体加热到蒸汽导入点以下，使得液体流从第一塔的底部流出，气流从第一塔的顶部流出。
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