公开(公告)号：US5833813A

公开(公告)日：1998-11-10

申请号：US737207

申请日：1996-11-07

申请人： Hitoshi Yano ,  Yoshinari Yamaguchi ,  Hirokazu Ito ,  Ryuichi Ishikawa ,  Yukihiro Matsumoto ,  Teruhisa Kaziwara

发明人： Hitoshi Yano ,  Yoshinari Yamaguchi ,  Hirokazu Ito ,  Ryuichi Ishikawa ,  Yukihiro Matsumoto ,  Teruhisa Kaziwara

IPC分类号： B01D3/14 ,  C07D331/02 ,  B01D3/00

CPC分类号： C07D331/02 ,  B01D3/146

摘要： A method of recovering ethylene sulfide from a hydrous stock solution (solution) containing ethylene sulfide, toluene (hydrophobic organic compound) having a higher boiling point than ethylene sulfide, and a compound having a higher boiling point than toluene, by distilling the stock solution continuously using a continuous fractionating tower 2, a fractionating tower 4, and a rectifying tower 5. Ethylene sulfide is distilled out with toluene and water from the continuous fractionating tower 2, and the distillate is allowed to separate into an oil layer and a water layer in a separating tank 3. The oil layer is distilled continuously by the fractionating tower 4 without being subjected to a reflux operation to distill out water with a part of ethylene sulfide. The bottom product from the fractionating tower 4 is rectified by the rectifying tower 5 to recover ethylene sulfide. Consequently, the polymerization reaction of ethylene sulfide can be suppressed and ethylene sulfide can be separated and recovered continuously in an efficient and stable manner. Also, the clogging of fractionating towers and pipes can be prevented.

摘要翻译： PCT No.PCT / JP96 / 00890 Sec。 371日期：1996年11月7日 102（e）1996年11月7日PCT PCT 1996年4月2日PCT公布。 出版物WO96 / 31495 日期：1996年10月10日从含有环硫乙烷，沸点高于环硫乙烷的甲苯（疏水性有机化合物）和沸点高于甲苯的化合物的含水储备溶液（溶液）中回收环硫乙烷的方法， 使用连续分馏塔2，分馏塔4和精馏塔5连续蒸馏储备溶液。将来自连续分馏塔2的甲苯和水蒸馏出乙烯硫醚，使馏出物分离成油层 和分离罐3中的水层。油层通过分馏塔4连续蒸馏而不进行回流操作，以用一部分环硫乙烷蒸馏出水。 来自分馏塔4的底部产物由精馏塔5精馏，以回收硫化亚乙烯。 因此，可以抑制环硫乙烷的聚合反应，并且可以以有效且稳定的方式连续分离和回收环硫乙烷。 此外，可以防止分馏塔和管道的堵塞。

公开(公告)号：US5304656A

公开(公告)日：1994-04-19

申请号：US980009

申请日：1992-11-23

申请人： Hitoshi Yano ,  Yoshinari Yamaguchi ,  Kimio Ariyoshi ,  Yuuji Shimasaki ,  Ryuichi Ishikawa ,  Michio Ueshima

发明人： Hitoshi Yano ,  Yoshinari Yamaguchi ,  Kimio Ariyoshi ,  Yuuji Shimasaki ,  Ryuichi Ishikawa ,  Michio Ueshima

IPC分类号： C07D331/02

CPC分类号： C07D331/02

摘要： In a process for preparing alkylene sulfides through the intramolecular dehydration reaction of mercaptoalkanols in a gaseous phase, catalysts are used, which are represented by the formula: M.sub.a X.sub.b Y.sub.c O.sub.d, where M represents at least one element selected from the group of alkali metals, alkaline earth metals and thallium; X represents at least one element selected from the group of Al, B, Si and P; Y represents at least one element selected from the group consisting of lanthanides, IIIA group, IVA group, VA group, IIIB group, IVB group, VB group and VIB group, excluding an element contained in M or X; O represents oxygen; and a and b are numerical values not equal to 0; b=0.2-100 and c=0-50 when a=1; and d is a numerical value determined according to a, b and c.

摘要翻译： 在通过巯基链烷醇在气相中的分子内脱水反应制备亚烷基硫化物的方法中，使用由下式表示的催化剂：MaXbYcOd，其中M表示选自碱金属，碱土金属中的至少一种元素 和铊; X表示选自Al，B，Si和P中的至少一种元素; Y表示选自镧系元素，IIIA族，IVA族，VA族，IIIB族，IVB族，VB族和VIB族中的至少一种元素，不包括M或X中含有的元素; O表示氧; a和b是不等于0的数值; 当a = 1时，b = 0.2-100和c = 0-50; d是根据a，b和c确定的数值。

公开(公告)号：US06436243B1

公开(公告)日：2002-08-20

申请号：US09690846

申请日：2000-10-18

申请人： Yoshinari Yamaguchi ,  Hitoshi Yano ,  Akira Kurusu ,  Yuuji Shimasaki

发明人： Yoshinari Yamaguchi ,  Hitoshi Yano ,  Akira Kurusu ,  Yuuji Shimasaki

IPC分类号： B01D342

CPC分类号： C07D207/267 ,  C07D207/27

摘要： A process for recovering N-vinyl-2-pyrrolidone is provided which allows to recover N-vinyl-2-pyrrolidone efficiently and steadily and in high purity by continuous distillation from a mixed liquid containing N-vinyl-2-pyrrolidone, N-(2-hydroxyethyl)-2-pyrrolidone, compounds having a higher boiling point than N-vinyl-2-pyrrolidone and water. The process includes continuously distilling the mixed liquid using a distilling column, controlling the temperature of the bottom liquid of the distilling column at 180° C. or less.

摘要翻译： 提供了一种回收N-乙烯基-2-吡咯烷酮的方法，其通过连续蒸馏从含有N-乙烯基-2-吡咯烷酮，N-（乙烯基-2-吡咯烷酮，N-乙烯基-2-吡咯烷酮的混合液体）中有效且稳定且高纯度地回收N-乙烯基-2-吡咯烷酮， 2-羟乙基）-2-吡咯烷酮，沸点高于N-乙烯基-2-吡咯烷酮和水的化合物。 该方法包括使用蒸馏塔连续蒸馏混合液，将蒸馏塔的底部液体的温度控制在180℃以下。