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1. 发明申请

WO1995014635A1 PROCESS FOR PREPARING ALKYLENE OXIDES 审中-公开
标题翻译：制备亚烷基氧化物的方法
公开(公告)号：WO1995014635A1
公开(公告)日：1995-06-01
申请号：PCT/US1994013005
申请日：1994-11-09
申请人： THE DOW CHEMICAL COMPANY
发明人： THE DOW CHEMICAL COMPANY , TRENT, David, L. , QUARDERER, George , BARGERON, Kim, G. , GREMINGER, Douglas, C. , KORANEK, David, J. , STEWART, Erik, J. , SWISHER, Curtis, N. , TIRTOWIDJOJO, Cheryl, A. , TIRTOWIDJOJO, Danil
IPC分类号： C01B11/04
CPC分类号： C01B11/04 , B01F13/0059 , C01B11/064 , C07C29/66 , C07D301/26 , C07C31/36
摘要： A process of preparing alkylene oxides comprises steps of: (1) optionally contacting metal hydroxide or oxide with chlorine to form a metal hypochlorite solution; (2) contacting chlorine with a solution of a metal hypochlorite at a temperature below 60 DEG C, and a pH of less than 5.5, with sufficient micromixing to achieve a product hypochlorous acid in a yield of at least 80 mole percent based on hypochlorite; (3) separating at least a portion of the hypochlorous acid from an aqueous metal chloride solution thereof, hereinafter referred to as chloride brine, wherein the solution is sprayed as droplets having a volume median diameter of less than 500 micrometers into a vapor stream such that at least 30 mole percent of the hypochlorous acid is desorbed from a liquid phase into a vapor phase where hypochlorous acid and dichlorine monoxide are in equilibrium; (4) distilling the remaining liquid phase to obtain additional hypochlorous acid and dichlorine monoxide vapor; (5) absorbing the hypochlorous acid and dichlorine monoxide in low-chlorides water to produce a low-chlorides aqueous hypochlorous acid solution; (6) contacting the low-chlorides aqueous hypochlorous acid solution with an olefin in a continuous process using a continuous stirred tank reactor to maintain a uniform steady-state HOCl concentration in the reactor of 0.2 weight percent or less to form a corresponding olefin chlorohydrin; (7) optionally contacting the olefin chlorohydrin with a base to form a corresponding alkylene oxide and a salt solution; and (8) optionally separating the alkylene oxide from the salt solution; (9) optionally removing chlorates from the chloride brine from at least one of Steps 3 or 4 by contacting the chlorates with acid to convert the chlorates to chlorine; and (10) optionally recycling the chlorine to at least one of Steps 1 or 4. The process yields particularly high yields of the alkylene oxide without substantial production of by-products.
摘要翻译：制备环氧烷的方法包括以下步骤：（1）任选地将金属氢氧化物或氧化物与氯接触以形成金属次氯酸盐溶液; （2）在低于60℃的温度下将氯与金属次氯酸盐溶液接触，并且pH小于5.5，以足够的微量混合，以基于次氯酸盐的至少80摩尔％的产率获得产物次氯酸; （3）将次氯酸的至少一部分与其金属氯化物水溶液（以下称为氯化物盐水）分离，其中溶液以体积中值粒径小于500微米的液滴喷射到蒸气流中，使得次氯酸的至少30摩尔％从液相中解吸到其中次氯酸和二氯一氧化
碳处于平衡状态的气相中; （4）蒸馏剩余的液相以获得额外的次氯酸和二氧化氯蒸气; （5）在低氯水中吸收次氯酸和二氯一氧化物，生成低氯酸次氯酸溶液; （6）使用连续搅拌釜反应器在连续方法中使低氯化物次氯酸溶液与烯烃接触，以使反应器中均匀的稳态HOCl浓度维持在0.2重量％以下以形成相应的烯丙基氯代醇; （7）任选地将烯醇氯醇与碱接触以形成相应的环氧烷和盐溶液; 和（8）任选地从所述盐溶液中分离出烯化氧; （9）通过使氯酸盐与酸接触以将氯酸盐转化为氯，任选地从步骤3或4中的至少一个从氯化物盐水中除去氯酸盐; 和（10）任选地将氯再循环到步骤1或4中的至少一个。该方法产生特别高的环氧烷产率而不大量生产副产物。

2. 发明授权

EP0730559B1 PROCESS FOR PREPARING ALKYLENE OXIDES 失效转让
标题翻译：用于生产亚
公开(公告)号：EP0730559B1
公开(公告)日：1997-09-17
申请号：EP95904059.3
申请日：1994-11-09
申请人： THE DOW CHEMICAL COMPANY
发明人： TRENT, David, L. , QUARDERER, George , BARGERON, Kim, G. , GREMINGER, Douglas, C. , KORANEK, David, J. , STEWART, Erik J. , SWISHER, Curtis, N. , TIRTOWIDJOJO, Cheryl, A. , TIRTOWIDJOJO, Danil
IPC分类号： C01B11/04 , C07C29/66 , C07D301/26
CPC分类号： C01B11/04 , B01F13/0059 , C01B11/064 , C07C29/66 , C07D301/26 , C07C31/36
摘要： A process of preparing alkylene oxides comprises steps of: (1) optionally contacting metal hydroxide or oxide with chlorine to form a metal hypochlorite solution; (2) contacting chlorine with a solution of a metal hypochlorite at a temperature below 60 °C, and a pH of less than 5.5, with sufficient micromixing to achieve a product hypochlorous acid in a yield of at least 80 mole percent based on hypochlorite; (3) separating at least a portion of the hypochlorous acid from an aqueous metal chloride solution thereof, hereinafter referred to as chloride brine, wherein the solution is sprayed as droplets having a volume median diameter of less than 500 micrometers into a vapor stream such that at least 30 mole percent of the hypochlorous acid is desorbed from a liquid phase into a vapor phase where hypochlorous acid and dichlorine monoxide are in equilibrium; (4) distilling the remaining liquid phase to obtain additional hypochlorous acid and dichlorine monoxide vapor; (5) absorbing the hypochlorous acid and dichlorine monoxide in low-chlorides water to produce a low-chlorides aqueous hypochlorous acid solution; (6) contacting the low-chlorides aqueous hypochlorous acid solution with an olefin in a continuous process using a continuous stirred tank reactor to maintain a uniform steady-state HOCl concentration in the reactor of 0.2 weight percent or less to form a corresponding olefin chlorohydrin; (7) optionally contacting the olefin chlorohydrin with a base to form a corresponding alkylene oxide and a salt solution; and (8) optionally separating the alkylene oxide from the salt solution; (9) optionally removing chlorates from the chloride brine from at least one of Steps 3 or 4 by contacting the chlorates with acid to convert the chlorates to chlorine; and (10) optionally recycling the chlorine to at least one of Steps 1 or 4. The process yields particularly high yields of the alkylene oxide without substantial production of by-products.

3. 发明公开

EP0730559A1 PROCESS FOR PREPARING ALKYLENE OXIDES 失效转让
标题翻译：用于生产亚
公开(公告)号：EP0730559A1
公开(公告)日：1996-09-11
申请号：EP95904059.0
申请日：1994-11-09
申请人： THE DOW CHEMICAL COMPANY
发明人： TRENT, David, L. , QUARDERER, George , BARGERON, Kim, G. , GREMINGER, Douglas, C. , KORANEK, David, J. , STEWART, Erik J. , SWISHER, Curtis, N. , TIRTOWIDJOJO, Cheryl, A. , TIRTOWIDJOJO, Danil
IPC分类号： C01B11 , C07C29 , C07C33 , C07D301
CPC分类号： C01B11/04 , B01F13/0059 , C01B11/064 , C07C29/66 , C07D301/26 , C07C31/36
摘要： A process of preparing alkylene oxides comprises steps of: (1) optionally contacting metal hydroxide or oxide with chlorine to form a metal hypochlorite solution; (2) contacting chlorine with a solution of a metal hypochlorite at a temperature below 60 °C, and a pH of less than 5.5, with sufficient micromixing to achieve a product hypochlorous acid in a yield of at least 80 mole percent based on hypochlorite; (3) separating at least a portion of the hypochlorous acid from an aqueous metal chloride solution thereof, hereinafter referred to as chloride brine, wherein the solution is sprayed as droplets having a volume median diameter of less than 500 micrometers into a vapor stream such that at least 30 mole percent of the hypochlorous acid is desorbed from a liquid phase into a vapor phase where hypochlorous acid and dichlorine monoxide are in equilibrium; (4) distilling the remaining liquid phase to obtain additional hypochlorous acid and dichlorine monoxide vapor; (5) absorbing the hypochlorous acid and dichlorine monoxide in low-chlorides water to produce a low-chlorides aqueous hypochlorous acid solution; (6) contacting the low-chlorides aqueous hypochlorous acid solution with an olefin in a continuous process using a continuous stirred tank reactor to maintain a uniform steady-state HOCl concentration in the reactor of 0.2 weight percent or less to form a corresponding olefin chlorohydrin; (7) optionally contacting the olefin chlorohydrin with a base to form a corresponding alkylene oxide and a salt solution; and (8) optionally separating the alkylene oxide from the salt solution; (9) optionally removing chlorates from the chloride brine from at least one of Steps 3 or 4 by contacting the chlorates with acid to convert the chlorates to chlorine; and (10) optionally recycling the chlorine to at least one of Steps 1 or 4. The process yields particularly high yields of the alkylene oxide without substantial production of by-products.

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