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公开(公告)号:US20080161595A1
公开(公告)日:2008-07-03
申请号:US11715776
申请日:2007-03-08
IPC分类号: C07C67/02
CPC分类号: C07C67/03 , C07C67/54 , Y02P20/127 , C07C69/003 , C07C69/14
摘要: A transesterification process of methyl acetate is provided. The process comprises: (a) performing a first reactive distillation of a methyl acetate solution and a first alcohol to generate a first ester and a first mixture; (b) performing a first distillation of a first part of the first mixture to generate a second mixture; and (c) performing a second reactive distillation of a first part of the second mixture and a second alcohol to generate a second ester; wherein the respective one of the first and second alcohols is a limiting reagent. The transesterification process provided in the present invention could highly reduce the investing production cost of the transesterification of the by-product, methyl acetate, in the conventional polyvinyl alcohol plants.
摘要翻译: 提供乙酸甲酯的酯交换过程。 该方法包括:(a)对乙酸甲酯溶液和第一醇进行第一反应蒸馏以产生第一酯和第一混合物; (b)对所述第一混合物的第一部分进行第一蒸馏以产生第二混合物; 和(c)对所述第二混合物的第一部分和第二醇进行第二反应蒸馏以产生第二酯; 其中所述第一和第二醇中的相应的一种是限制性试剂。 本发明提供的酯交换方法可以大大降低常规聚乙烯醇装置中副产物乙酸甲酯的酯交换反应的投资生产成本。
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公开(公告)号:US07399881B1
公开(公告)日:2008-07-15
申请号:US11715776
申请日:2007-03-08
IPC分类号: C07C67/02
CPC分类号: C07C67/03 , C07C67/54 , Y02P20/127 , C07C69/003 , C07C69/14
摘要: A transesterification process of methyl acetate is provided. The process comprises: (a) performing a first reactive distillation of a methyl acetate solution and a first alcohol to generate a first ester and a first mixture; (b) performing a first distillation of a first part of the first mixture to generate a second mixture; and (c) performing a second reactive distillation of a first part of the second mixture and a second alcohol to generate a second ester; wherein the respective one of the first and second alcohols is a limiting reagent. The transesterification process provided in the present invention could highly reduce the investing production cost of the transesterification of the by-product, methyl acetate, in the conventional polyvinyl alcohol plants.
摘要翻译: 提供乙酸甲酯的酯交换过程。 该方法包括:(a)对乙酸甲酯溶液和第一醇进行第一反应蒸馏以产生第一酯和第一混合物; (b)对所述第一混合物的第一部分进行第一蒸馏以产生第二混合物; 和(c)对所述第二混合物的第一部分和第二醇进行第二反应蒸馏以产生第二酯; 其中所述第一和第二醇中的相应的一种是限制性试剂。 本发明提供的酯交换方法可以大大降低常规聚乙烯醇装置中副产物乙酸甲酯的酯交换反应的投资生产成本。
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3.
公开(公告)号:US20120123157A1
公开(公告)日:2012-05-17
申请号:US12944240
申请日:2010-11-11
申请人: Hsiao-Ping HUANG , Ming-Jer Lee , Hao-Yen Lee , Jyun-Hong Chen
发明人: Hsiao-Ping HUANG , Ming-Jer Lee , Hao-Yen Lee , Jyun-Hong Chen
CPC分类号: C07C51/09 , B01J8/20 , B01J19/0066 , B01J19/18 , B01J2219/00006 , B01J2219/00108 , C07C51/44 , C07C67/36 , Y02P20/127 , C07C53/02 , C07C69/06
摘要: Formic acid manufacturing system and method of manufacturing formic acid. The formic acid manufacturing system includes a reactor, a first separation device, a second separation device, a reactive distillation device and a third separation device. Methyl formate is produced in the reactor by processing a conbonylation reaction of external carbon monoxide and methanol. Water is added into the reactive distillation device externally, and formic acid and methanol is produced in the reactive distillation device by hydrolyzing methyl formate with water. A formic acid solution is obtained from an output of the third separation device.
摘要翻译: 甲酸生产体系及甲酸生产方法。 甲酸制造系统包括反应器,第一分离装置,第二分离装置,反应蒸馏装置和第三分离装置。 通过加工外部一氧化碳和甲醇的共羰化反应,在反应器中生产甲酸甲酯。 向外部向反应蒸馏装置中加入水,通过用水水解甲酸甲酯,在反应蒸馏装置中生成甲酸和甲醇。 从第三分离装置的输出获得甲酸溶液。
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公开(公告)号:US20140256067A1
公开(公告)日:2014-09-11
申请号:US14286433
申请日:2014-05-23
IPC分类号: H01L21/66
CPC分类号: H01L22/12 , G03F7/70633
摘要: The present disclosure provides an integrated circuit structure that includes a semiconductor substrate having a first region and a second region having an area less than about 10 micron×10 micron; a first material layer over the semiconductor substrate and patterned to have a first circuit feature in the first region and a first mark in the second region; and a second material layer over the first material layer and patterned to have a second circuit feature in the first region and a second mark in the second region. The first mark includes first mark features oriented in a first direction, and second mark features oriented in a second direction perpendicular to the first direction. The second mark includes third mark features oriented in the first direction, and fourth mark features oriented in the second direction.
摘要翻译: 本公开提供了一种集成电路结构,其包括具有第一区域的半导体衬底和具有小于约10微米×10微米的面积的第二区域; 半导体衬底上的第一材料层,并被图案化以具有第一区域中的第一电路特征和第二区域中的第一标记; 以及在所述第一材料层之上的第二材料层,并被图案化以具有所述第一区域中的第二电路特征和所述第二区域中的第二标记。 第一标记包括沿第一方向定向的第一标记特征,以及在垂直于第一方向的第二方向上定向的第二标记特征。 第二标记包括沿第一方向定向的第三标记特征,第四标记特征指向第二方向。
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公开(公告)号:US08736084B2
公开(公告)日:2014-05-27
申请号:US13314644
申请日:2011-12-08
IPC分类号: H01L23/544
CPC分类号: H01L22/12 , G03F7/70633
摘要: The present disclosure provides an integrated circuit structure that includes a semiconductor substrate having a first region and a second region having an area less than about 10 micron×10 micron; a first material layer over the semiconductor substrate and patterned to have a first circuit feature in the first region and a first mark in the second region; and a second material layer over the first material layer and patterned to have a second circuit feature in the first region and a second mark in the second region. The first mark includes first mark features oriented in a first direction, and second mark features oriented in a second direction perpendicular to the first direction. The second mark includes third mark features oriented in the first direction, and fourth mark features oriented in the second direction.
摘要翻译: 本公开提供了一种集成电路结构,其包括具有第一区域的半导体衬底和具有小于约10微米×10微米的面积的第二区域; 半导体衬底上的第一材料层,并被图案化以具有第一区域中的第一电路特征和第二区域中的第一标记; 以及在所述第一材料层之上的第二材料层,并被图案化以具有所述第一区域中的第二电路特征和所述第二区域中的第二标记。 第一标记包括沿第一方向定向的第一标记特征,以及在垂直于第一方向的第二方向上定向的第二标记特征。 第二标记包括沿第一方向定向的第三标记特征,第四标记特征指向第二方向。
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