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公开(公告)号：US5892118A
公开(公告)日：1999-04-06
申请号：US947160
申请日：1997-10-08
IPC分类号： C07C45/46 , C07C213/02 , C07C215/80 , C08G73/22 , C07C215/78 , C07C209/58
CPC分类号： C08G73/22 , C07C213/02 , C07C45/46
摘要： A process for producing 4,6-diaminoresorcinols comprises the steps of:subjecting a dioxime of the formula (4) ##STR1## wherein R is an alkyl or phenyl group, to Beckmann rearrangement to thereby produce 4,6-diacylaminoresorcinol of the formula (5) ##STR2## wherein R is as defined above, and subjecting the 4,6-diacylaminoresorcinol to hydrolysis and recovering the product 4,6-diaminoresorcinol (6) ##STR3## or a salt thereof.
摘要翻译： 制备4,6-二氨基间苯二酚的方法包括以下步骤：使式（4）的肟基（4）其中R是烷基或苯基进行贝克曼重排，从而产生4,6-二酰基氨基间苯二酚 式（5）其中R如上定义，并且使4,6-二酰基氨基间苯二酚水解并回收产物4,6-二氨基间苯二酚（6）或其盐 。
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2.发明授权Purified salt of &bgr;-hydroxyethoxy acetic acid, purified 2-p-dioxanone, and manufacturing method therefor 有权纯化的2-羟基乙氧基乙酸盐，纯化的2-对二恶烷酮及其制备方法公开(公告)号：US06384241B2
公开(公告)日：2002-05-07
申请号：US09820674
申请日：2001-03-30
IPC分类号： C07D40700
CPC分类号： C07D319/12 , C07C51/43 , C07C51/47 , C07C59/125
摘要： A purified salt of &bgr;-hydroxyethoxy acetic acid of formula (1) having a fusion peak-top temperature detected by differential scanning calorimetry (DSC) and a purified 2-p-dioxanone of formula (2) derived from the purified salt of &bgr;-hydroxyethoxy acetic acid of formula (1). (wherein in formula (1), n=1-2, and if n=1, M is Na and/or K, and, if n=2, M is Ca and/or Mg.)
摘要翻译： 具有通过差示扫描量热法（DSC）检测的融合峰顶温度的式（1）的纯化的β-羟基乙氧基乙酸盐和由纯化的β- （1）的羟基乙氧基乙酸（其中在式（1）中n = 1-2，如果n = 1，M是Na和/或K，如果n = 2，M是Ca和/或 镁）
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公开(公告)号：US20050027088A1
公开(公告)日：2005-02-03
申请号：US10834978
申请日：2004-04-30
摘要： A production process for a vinyl chloride polymer is proposed in which either vinyl chloride, or a monomer mixture comprising vinyl chloride, is polymerized in an aqueous medium inside a polymerization vessel, while heat removal is conducted using a reflux condenser. In this process, the liquid level of the contents inside the polymerization vessel is monitored using an electric wave liquid level gauge, which is disposed on the polymerization vessel and radiates microwaves with a frequency of 4 to 20 GHz. The operating efficiency of the reflux condenser can be improved, and the quantity of heat removed by the reflux condenser can be increased. Furthermore, the time required to complete the process, including the raw material addition step and/or the washing step conducted following completion of the polymerization, can be shortened.
摘要翻译： 提出了氯乙烯聚合物的制备方法，其中氯乙烯或包含氯乙烯的单体混合物在聚合容器内部的水性介质中聚合，同时使用回流冷凝器进行除热。 在该过程中，使用设置在聚合容器上的电波液位计并辐射频率为4至20GHz的微波来监测聚合容器内部的内容物的液面。 可以提高回流冷凝器的运行效率，并且可以提高由回流冷凝器除去的热量。 此外，可以缩短完成该方法所需的时间，包括在聚合完成后进行的原料添加步骤和/或洗涤步骤。
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公开(公告)号：US06977288B2
公开(公告)日：2005-12-20
申请号：US10834978
申请日：2004-04-30
摘要： A production process for a vinyl chloride polymer is proposed in which either vinyl chloride, or a monomer mixture comprising vinyl chloride, is polymerized in an aqueous medium inside a polymerization vessel, while heat removal is conducted using a reflux condenser. In this process, the liquid level of the contents inside the polymerization vessel is monitored using an electric wave liquid level gauge, which is disposed on the polymerization vessel and radiates microwaves with a frequency of 4 to 20 GHz. The operating efficiency of the reflux condenser can be improved, and the quantity of heat removed by the reflux condenser can be increased. Furthermore, the time required to complete the process, including the raw material addition step and/or the washing step conducted following completion of the polymerization, can be shortened.
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5.发明授权公开(公告)号：US06448372B2
公开(公告)日：2002-09-10
申请号：US09764093
申请日：2001-01-19
IPC分类号： C08F624
摘要： A process for producing a vinyl chloride polymer, including the steps of (a) subjecting a vinyl chloride monomer alone or a monomer mixture containing a vinyl chloride, to suspension polymerization in water; (b) subjecting the resultant vinyl chloride polymer slurry to stripping to remove an unreacted monomer remaining therein; and (c) dehydrating the polymer slurry having been subjected to stripping. In the polymerization step (a), the ratio of water/monomer is set in a weight ratio of from 0.80 to 1.50, and the viscosity at 20° C. of the polymer slurry to be fed to the stripping step is previously kept adjusted to 0.30 Pa·s or lower. In the stripping step (c), the residual unreacted monomer in the polymer slurry can efficiently be removed using steam in a smaller quantity, thus the vinyl chloride polymer can be produced at a high productivity.
摘要翻译： 一种制备氯乙烯聚合物的方法，包括以下步骤：（a）使单独的氯乙烯单体或含有氯乙烯的单体混合物在水中悬浮聚合; （b）将得到的氯乙烯聚合物浆料进行汽提以除去其中残留的未反应单体; 和（c）使经过剥离的聚合物浆料脱水。 在聚合步骤（a）中，将水/单体的比例设定为0.80至1.50的重量比，并将预先进料到汽提步骤的聚合物浆料的20℃下的粘度预先保持在 0.30 Pa.s以下。 在汽提步骤（c）中，聚合物淤浆中残留的未反应单体可以用较少量的蒸汽有效地除去，从而可以高生产率生产氯乙烯聚合物。
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