公开(公告)号：US07417168B2

公开(公告)日：2008-08-26

申请号：US11732837

申请日：2007-04-05

申请人： Pin-To Yao ,  Cheng-Fa Hsieh ,  Yuh-Ing Hwang

发明人： Pin-To Yao ,  Cheng-Fa Hsieh ,  Yuh-Ing Hwang

IPC分类号： C07C239/08

CPC分类号： C01B21/1418 ,  C01C3/11 ,  C01C3/12 ,  C01P2006/80

摘要： A method for preparing hydroxylamine is provided that includes the steps of (i) pretreating an acidic buffer solution; and (ii) reducing nitrate ions in the acidic buffer solution with hydrogen to give hydroxylamine in the presence of catalysts, wherein the pretreatment is performed by adding a precipitant represented by formula (I) to the acidic buffer solution, [(A)aM(CN)6.xH2O]  (I) allowing the metal impurities in the acidic buffer solution to react with the precipitant to form metal complex, and then to remove the metal complex. The metal complex is formed and separated by pretreating the acidic buffer solution with a specific precipitant without adjusting pH and changing the composition of the acidic buffer solution prior to hydroxylamine synthesis, thus enhancing the selectivity of the hydroxylamine production.

摘要翻译： 提供了制备羟胺的方法，其包括以下步骤：（i）预处理酸性缓冲溶液; （ii）在催化剂存在下用氢还原酸性缓冲溶液中的硝酸根离子，得到羟胺，其中预处理是通过将由式（I）表示的沉淀剂加入到酸性缓冲溶液中， 公式描述=“在线公式”end =“lead”？> [（A）aM（CN）6 .XH （I）<？ -line-formula description =“In-line Formulas”end =“tail”？>使酸性缓冲溶液中的金属杂质与沉淀剂反应形成金属络合物，然后除去金属络合物。 通过用特定沉淀剂预处理酸性缓冲溶液而不调节pH并在羟胺合成之前改变酸性缓冲溶液的组成，形成和分离金属络合物，从而提高羟胺生产的选择性。

公开(公告)号：US20080015388A1

公开(公告)日：2008-01-17

申请号：US11732837

申请日：2007-04-05

申请人： Pin-To Yao ,  Cheng-Fa Hsieh ,  Yuh-Ing Hwang

发明人： Pin-To Yao ,  Cheng-Fa Hsieh ,  Yuh-Ing Hwang

IPC分类号： C07C239/08

CPC分类号： C01B21/1418 ,  C01C3/11 ,  C01C3/12 ,  C01P2006/80

摘要： A method for preparing hydroxylamine is provided that includes the steps of (i) pretreating an acidic buffer solution; and (ii) reducing nitrate ions in the acidic buffer solution with hydrogen to give hydroxylamine in the presence of catalysts, wherein the pretreatment is performed by adding a precipitant represented by formula (I) to the acidic buffer solution, [(A)aM(CN)6.xH2O]  (I) allowing the metal impurities in the acidic buffer solution to react with the precipitant to form metal complex, and then to remove the metal complex. The metal complex is formed and separated by pretreating the acidic buffer solution with a specific precipitant without adjusting pH and changing the composition of the acidic buffer solution prior to hydroxylamine synthesis, thus enhancing the selectivity of the hydroxylamine production.

摘要翻译： 提供了制备羟胺的方法，其包括以下步骤：（i）预处理酸性缓冲溶液; （ii）在催化剂存在下用氢还原酸性缓冲溶液中的硝酸根离子，得到羟胺，其中预处理是通过将由式（I）表示的沉淀剂加入到酸性缓冲溶液中， 公式描述=“在线公式”end =“lead”？> [（A）aM（CN）6 .XH （I）<？ -line-formula description =“In-line Formulas”end =“tail”？>使酸性缓冲溶液中的金属杂质与沉淀剂反应形成金属络合物，然后除去金属络合物。 通过用特定沉淀剂预处理酸性缓冲溶液而不调节pH并在羟胺合成之前改变酸性缓冲溶液的组成，形成和分离金属络合物，从而提高羟胺生产的选择性。