公开(公告)号：US4203824A

公开(公告)日：1980-05-20

申请号：US972230

申请日：1978-12-22

申请人： Biddanda U. Achia ,  David H. Shaw

发明人： Biddanda U. Achia ,  David H. Shaw

IPC分类号： C10G73/16 ,  C10G73/04 ,  C10G43/06 ,  C10G43/08

CPC分类号： C10G73/04

摘要： Polyvinylpyrrolidone having a number average molecular weight ranging from about 150,000 to 400,000 has been found to be an effective dewaxing aid for bright stock in ketone dewaxing processes. Using as little as 100 ppm based on the waxy oil can result in almost a 50% increase in the filter rate of the dewaxed oils from the wax.

摘要翻译： 已经发现数均分子量为约150,000至400,000的聚乙烯吡咯烷酮是用于酮脱蜡方法中光亮原料的有效脱蜡助剂。 基于蜡油使用少至100ppm可以使来自蜡的脱蜡油的过滤速率几乎增加50％。

公开(公告)号：US20180142169A1

公开(公告)日：2018-05-24

申请号：US15579456

申请日：2016-06-10

申请人： Sulzer Chemtech AG

发明人： Mathias Pfeil

IPC分类号： C10G73/12 ,  B01D9/00 ,  C10G73/10 ,  C10G73/14 ,  C10G73/16

CPC分类号： C10G73/12 ,  B01D9/0013 ,  B01D2009/0086 ,  C10G73/06 ,  C10G73/10 ,  C10G73/14 ,  C10G73/16

摘要： The present invention relates to a method for fractionating a crude mixture comprising at least one oil and at least one wax, which comprises the following steps: (a) mixing the crude mixture with a solvent to obtain a crude solvent-mixture, (b) carrying out at least one crystallization stage with the solvent-mixture obtained in step (a) to prepare a first fraction containing dewaxed oil and a second fraction containing slack wax, (c) carrying out at least one crystallization stage with the second fraction obtained in step (b) in a layer crystallizer, wherein to the second fraction prior to the crystallization in step (c) no solvent or at most 100% by weight of solvent relative to the weight of the second fraction are added, to prepare a third fraction containing hard wax having an oil content of at most 1.5% by weight and a fourth fraction containing soft wax having an oil content of more than 1.5% by weight and (d) circulating at least a part of the fourth fraction into at least one of the at least one crystallization stage of step (b).

公开(公告)号：US2208534A

公开(公告)日：1940-07-16

申请号：US22420138

申请日：1938-08-10

申请人： EDELEANU GMBH

发明人： ERNST BOSING

IPC分类号： C10G21/20 ,  C10G73/16

CPC分类号： C10G21/00 ,  C10G21/20 ,  C10G73/16

公开(公告)号：US10138433B2

公开(公告)日：2018-11-27

申请号：US15579456

申请日：2016-06-10

申请人： Sulzer Chemtech AG

发明人： Mathias Pfeil

IPC分类号： C10G73/06 ,  B01D9/00 ,  C10G73/12 ,  C10G73/14 ,  C10G73/10 ,  C10G73/16

摘要： The present invention relates to a method for fractionating a crude mixture comprising at least one oil and at least one wax, which comprises the following steps: (a) mixing the crude mixture with a solvent to obtain a crude solvent-mixture, (b) carrying out at least one crystallization stage with the solvent-mixture obtained in step (a) to prepare a first fraction containing dewaxed oil and a second fraction containing slack wax, (c) carrying out at least one crystallization stage with the second fraction obtained in step (b) in a layer crystallizer, wherein to the second fraction prior to the crystallization in step (c) no solvent or at most 100% by weight of solvent relative to the weight of the second fraction are added, to prepare a third fraction containing hard wax having an oil content of at most 1.5% by weight and a fourth fraction containing soft wax having an oil content of more than 1.5% by weight and (d) circulating at least a part of the fourth fraction into at least one of the at least one crystallization stage of step (b).