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相关专利推荐
名称: | 制备高纯度D―氨基酸的方法 |
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申请号: | CN200910228845 |
申请日期: | 2009-11-27 |
申请人: | 天津大学 |
发明人: | 赵林; 董涛; 宋正孝; 谭欣; 毛国柱 |
地址: | 300072 天津市南开区卫津路92号 |
主分类号: | C07C229/08 |
分类号: | C07C229/08; C07C227/20 |
主权项: | 一种制备高纯度D-氨基酸的方法,其特征由下述步骤组成:(1)脱乙酰∶按盐酸与乙酰-D-氨基酸摩尔比为2~4∶1的比例将盐酸加到0.05mol/L~0.50mol/L的乙酰-D-氨基酸的水溶液中,充分混合,加热至沸腾,回流4~7小时,减压蒸馏至干;(2)浓缩排酸:加入步骤(1)获得的物料质量1~3倍的水后蒸馏浓缩至干,所述加水蒸馏浓缩的次数为1~3次,加入水,使排酸后物料水溶液的浓度为0.05~0.50mol/L;(3)离子交换分离:将步骤(2)获得的溶液通过大孔强酸性阳离子交换树脂填充的固定床反应器,当流出液pH达1.0~2.0时停止进样,采用0.2~0.4mol/L的NH3·H2O溶液对所述树脂填充的固定床进行洗脱,收集洗脱液,当流出液pH达10.50~11.50时停止洗脱;(4)浓缩结晶;将所述洗脱液加入活性炭脱色,减压蒸馏至刚有固体析出时,调pH值至氨基酸的等电点,在-5~10℃静置10~24小时,收集得到的固体,烘干后得到一种高纯度D-氨基酸。 |
摘要: | 本发明公开了一种制备高纯度D-氨基酸的方法,由下述步骤组成:将盐酸加到乙酰-D-氨基酸的水溶液中,加热至沸腾,回流,减压蒸馏至干;浓缩排酸;离子交换分离;将洗脱液加入活性炭脱色,减压蒸馏至刚有固体析出时,调pH值至氨基酸的等电点,在-5~10℃静置10~24小时,收集得到的固体,烘干后得到一种高纯度D-氨基酸。本发明采用L-氨基酰化酶制备L-氨基酸生产过程中的副产品乙酰-D-氨基酸为原料,以离子交换法生产出纯度达99.7%的高纯度D-氨基酸产品。乙酰-D-氨基酸价格低廉,生产D-氨基酸过程的水解、离子交换、以及产品收集等操作均条件温和,工艺简单。 |
start date | end date | title | description | icon | date limit | importance | link | modal |
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2010-05-19 | 公开 | js/timeglider/js/timeglider/icons/verticalLineGray.png | 50 | |||||
2010-07-07 | 实质审查的生效 | js/timeglider/js/timeglider/icons/verticalLineGray.png | 50 | |||||
2013-04-03 | 发明专利申请公布后的视为撤回 | js/timeglider/js/timeglider/icons/verticalLineGray.png | 50 |
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#2 [internal function]: Home\Controller\PraiseController->get_bar_id_by_from_id()
#3 /home/ftp/1520/ipa361_com-20150420-MrH/ipa361.com/mapi/ThinkPHP/Library/Think/App.class.php(173): ReflectionMethod->invoke(Object(Home\Controller\PraiseController))
#4 /home/ftp/1520/ipa361_com-20150420-MrH/ipa361.com/mapi/ThinkPHP/Library/Think/App.class.php(110): Think\App::invokeAction(Object(Home\Controller\PraiseController), 'get_bar_id_by_f...')
#5 /home/ftp/1520/ipa361_com-20150420-MrH/ipa361.com/mapi/ThinkPHP/Library/Think/App.class.php(204): Think\App::exec()
#6 /home/ftp/1520/ipa361_com-20150420-MrH/ipa361.com/mapi/ThinkPHP/Library/Think/Think.class.php(120): Think\App::run()
#7 /home/ftp/1520/ipa361_com-20150420-MrH/ipa361.com/mapi/ThinkPHP/ThinkPHP.php(97): Think\Think::start()
#8 /home/ftp/1520/ipa361_com-20150420-MrH/ipa361.com/mapi/index.php(27): require('/home/ftp/1520/...')
#9 {main}