公开(公告)号：US4710552A

公开(公告)日：1987-12-01

申请号：US876299

申请日：1986-06-18

申请人： Robert Bachl ,  Volker Warzelhan ,  Guenther Schweier ,  Hans Gropper ,  Wolfgang Ball

发明人： Robert Bachl ,  Volker Warzelhan ,  Guenther Schweier ,  Hans Gropper ,  Wolfgang Ball

IPC分类号： C08F4/00 ,  C08F4/60 ,  C08F4/64 ,  C08F4/642 ,  C08F4/658 ,  C08F4/68 ,  C08F10/00 ,  C08F10/02 ,  C08F210/02

CPC分类号： C08F10/00 ,  C08F10/02 ,  Y10S526/901

摘要： Homopolymers and copolymers of ethene are prepared using a Ziegler catalyst system comprising (1) a transition metal catalyst component, (2) an organoaluminum catalyst component and (3) an organohalogen catalyst component, by a method in which the transition metal catalyst component (1) employed is a solid-phase product (VI) obtained by (1.1) first combining (1.1.1) an inorganic oxidic substrate (I), as the carrier, with (1.1.2) a solution (II) consisting of (IIa) a certain oxahydrocarbon and (IIb) a mixture of (IIb1) a vanadium trichloride/alcohol complex, (IIb2) a titanium trihalide or titanium trihalide/alcohol complex and, if required, (IIb3) a zirconium tetrahalide to form a suspension (III), evaporating down this suspension to form a solid-phase intermediate (IV), and (1.2) then (1.2.1) combining the solid-phase intermediate (IV) obtained from (1.1) with (1.2.2) a solution of an organoaluminum compound (V) to form a suspension, the resulting suspended solid-phase product (VI) being the transition metal catalyst component (1).

摘要翻译： 使用齐格勒催化剂体系制备乙烯的均聚物和共聚物，所述齐格勒催化剂体系包括（1）过渡金属催化剂组分，（2）有机铝催化剂组分和（3）有机卤化物催化剂组分，通过其中过渡金属催化剂组分 ）是通过（1.1）首先将作为载体的无机氧化物基质（I）与（1.1.2）由（IIa）组成的溶液（II）首先组合（1.1.1）获得的固相产物（VI） ）（IIb）（IIb1）三氯化钒/醇络合物，（IIb2）三卤化钛或三卤化钛/醇络合物的混合物（IIb），如果需要，（IIb3）四卤化锆以形成悬浮液（III ），将该悬浮液蒸发以形成固相中间体（IV），和（1.2）然后（1.2.1）将由（1.1）获得的固相中间体（IV）与（1.2.2）得到的固相中间体 有机铝化合物（V）以形成悬浮液，得到的悬浮固相产物（VI） 过渡金属催化剂组分（1）。

公开(公告)号：US4864005A

公开(公告)日：1989-09-05

申请号：US548447

申请日：1983-11-03

申请人： Volker Warzelhan ,  Wolfgang Ball ,  Robert Bachl

发明人： Volker Warzelhan ,  Wolfgang Ball ,  Robert Bachl

IPC分类号： C08F4/00 ,  C08F4/02 ,  C08F4/12 ,  C08F4/16 ,  C08F4/20 ,  C08F4/60 ,  C08F4/64 ,  C08F4/68 ,  C08F4/685 ,  C08F10/00

CPC分类号： C08F10/00

摘要： A process for the preparation of homopolymers and copolymers of .alpha.-monoolefins by polymerization of the monomer or monomers using a Ziegler catalyst system comprising (1) a transition metal catalyst component and (2) an organoaluminum catalyst component, in which the transition metal catalyst component (1) employed is a solid-phase product (VI) obtained by (1.1) first bringing (1.1.1) a finely divided, porous, inorganic oxidic substance (I) as the carrier, and (1.1.2) a solution (II), as obtained on combining (IIa) an alcohol and (IIb) a transition metal composition, into contact with one another to form a suspension (III), evaporating this suspension to dryness (formation of a solid-phase intermediate (IV)) and (1.2) then (1.2.1) bringing the solid-phase intermediate (IV) obtained from stage (1.1), and (1.2.2) a solution of an organoaluminum compound (V) in an organic solvent, into contact with one another to form a suspension, the resulting suspended solid-phase product (VI) being transition metal catalyst component (1), wherein the transition metal catalyst component (1) employed in a solid-phase product (VI) obtained using a transition metal composition (IIb) comprising (IIb1) a vanadium trihalide, (IIb2) a titanium trihalide and (IIb3) a zirconium tetrahalide.

摘要翻译： 通过使用齐格勒催化剂体系聚合单体或单体来制备α-单烯烃的均聚物和共聚物的方法，该齐格勒催化剂体系包含（1）过渡金属催化剂组分和（2）有机铝催化剂组分，其中过渡金属催化剂组分 （1）是通过（1.1）首先使（1.1.1）细分的，多孔的无机氧化物质（I）作为载体得到的固相产物（VI），和（1.1.2）溶液 II），将（IIa）醇和（IIb）过渡金属组合物相互接触以形成悬浮液（III），将该悬浮液蒸发至干（形成固相中间体（IV））， ）和（1.2）然后（1.2.1）使从阶段（1.1）获得的固相中间体（IV）和（1.2.2）将有机铝化合物（V）在有机溶剂中的溶液与 彼此形成悬浮液，得到的悬浮固相产物（VI） g过渡金属催化剂组分（1），其中使用过渡金属组合物（IIb）获得的固相产物（VI）中使用的过渡金属催化剂组分（1）包含（IIb1）三卤化钒，（IIb2）钛 三卤化物和（IIb3）四卤化锆。

公开(公告)号：US4705835A

公开(公告)日：1987-11-10

申请号：US876298

申请日：1986-06-18

申请人： Volker Warzelhan ,  Robert Bachl ,  Wolfgang Ball ,  Guido Funk ,  Martin Laun

发明人： Volker Warzelhan ,  Robert Bachl ,  Wolfgang Ball ,  Guido Funk ,  Martin Laun

IPC分类号： C08F4/00 ,  C08F4/14 ,  C08F4/16 ,  C08F4/20 ,  C08F4/60 ,  C08F4/622 ,  C08F4/64 ,  C08F4/658 ,  C08F10/00 ,  C08F10/02

CPC分类号： C08F10/00

摘要： .alpha.-Monoolefins are polymerized using a Ziegler catalyst system comprising (1) a transition metal catalyst component and (2) an organoaluminum catalyst component, in which (1) is a solid-phase product (VI) obtained by (1.1) first combining (1.1.1) an inorganic oxidic substance (I), as the carrier, with (1.1.2) a solution (II) consisting of (IIa) an organic solvent and (IIb) a transition metal composition to form a suspension (III), evaporating down this suspension to form a solid-phase intermediate (IV), and (1.2) then (1.2.1) combining the solid-phase intermediate (IV), obtained from (1.1), with (1.2.2) a solution of an organoaluminum compound (V) to form a suspension, the resulting suspended solid-phase product (VI) being the transition metal catalyst component (1). The characteristic feature is that (1) is a solid-phase product (VI) obtained using a solution (II) consisting of (IIa) a certain oxahydrocarbon and (IIb) a mixture of (IIb1) a vanadium trichloride/alcohol complex, (IIb2) a titanium trihalide and (IIb3) a zirconium tetrahalide.

摘要翻译： α-烯烃使用齐格勒催化剂体系进行聚合，该齐格勒催化剂体系包含（1）过渡金属催化剂组分和（2）有机铝催化剂组分，其中（1）是通过（1.1）获得的固相产物（VI） 1.1.1）作为载体的无机氧化物质（I）与（1.1.2）由（IIa）有机溶剂组成的溶液（II）和（IIb）形成悬浮液（III）的过渡金属组合物， 将该悬浮液蒸发以形成固相中间体（IV），和（1.2）然后（1.2.1）将由（1.1）获得的固相中间体（IV）与（1.2.2）得到的溶液 的有机铝化合物（V）以形成悬浮液，所得到的悬浮固相产物（VI）是过渡金属催化剂组分（1）。 其特征在于，（1）是使用由（IIa）某一氧杂烃和（IIb）（IIb1）三氯化钒/醇络合物的混合物（IIa）组成的溶液（II）获得的固相产物（VI） IIb2）三卤化钛和（IIb3）四卤化锆。

公开(公告)号：US4169925A

公开(公告)日：1979-10-02

申请号：US901196

申请日：1978-04-28

申请人： Wolfgang Gruber ,  Hans Frielingsdorf ,  Robert Bachl ,  Guenther Schweier

发明人： Wolfgang Gruber ,  Hans Frielingsdorf ,  Robert Bachl ,  Guenther Schweier

IPC分类号： C08F4/62 ,  C08F10/00 ,  C08F4/26 ,  C08F4/24 ,  C08F10/02

CPC分类号： C08F10/00

摘要： A process for the manufacture of olefin polymers by polymerizing .alpha.-monoolefins at relatively low temperatures and relatively low olefin pressures by means of a catalyst obtained from a silicate carrier (component a), an aluminum compound (component b) and a chromium compound (component c). The catalyst is obtained by (1) in a first stage, initially (1.1) charging a particular silicate carrier (component a) with (1.2) a mixture of (1.2.1) an aluminum salt or a mixture of an aluminum salt with up to 80 mole%, based on the salt mixture, of a nickel-II salt (component b) and (1.2.2) a chromium compound (component c), this compound being chromium trioxide or a compound which is converted to chromium trioxide under the conditions of stage (2), by treatment with a solution of the mixture (1.2), and (2), in a second stage then maintaining the product, obtained from stage (1), for a certain time at a high temperature in an anhydrous oxygen-containing gas stream. The process may be used to produce polymers having a relatively broad molecular weight distribution.

公开(公告)号：US4110523A

公开(公告)日：1978-08-29

申请号：US762856

申请日：1977-01-27

申请人： Guenther Schweier ,  Erich Kolk ,  Heinz Mueller-Tamm ,  Hans Frielingsdorf ,  Robert Bachl ,  Wolfgang Gruber

发明人： Guenther Schweier ,  Erich Kolk ,  Heinz Mueller-Tamm ,  Hans Frielingsdorf ,  Robert Bachl ,  Wolfgang Gruber

IPC分类号： C08F4/00 ,  C08F4/16 ,  C08F4/60 ,  C08F10/00 ,  C08F4/02 ,  C08F10/02

CPC分类号： C08F10/00

摘要： A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins of 2 to 6 carbon atoms by polymerizing the monomer or monomers by means of a Ziegler catalyst system comprising (1) a catalyst component containing titanium and (2) a particular compound of the metals aluminum, magnesium or zinc, the atomic ratio of titanium from catalyst component (1) to metal from catalyst component (2) being from 1:0.1 to 1:500, wherein the titanium-containing catalyst component (1) employed is the solid-phase product (IV) obtained by bringing into contact (1.1) a finely divided, porous, inorganic oxidic material (I) which has the formula SiO.sub.2 . aAl.sub.2 O.sub.3 --, where a is a number from 0 to 2, and (1.2) a solution (II) formed on bringing together (IIa) 100 parts by weight of an alcohol of the general formula Z--OH, where Z is a saturated hydrocarbon radical of 1 to 8 carbon atoms, (IIb) from 0.01 to 6 parts by weight (calculated as titanium) of a titanium trihalide and (IIc) from 0.01 to 4 parts by weight (calculated as magnesium) of a magnesium compound which is soluble in the alcohol (IIa), so as to form a dispersion (III), with the proviso that the weight ratio of inorganic oxidic material (I) to titanium in the titanium trihalide (IIb) is from 1:0.01 to 1:0.2 and the weight ratio of inorganic oxidic material (I) to magnesium in the magnesium compound (IIc) is from 1:0.01 to 1:0.25, and evaporating the dispersion (III) until it has a dry consistency, thus forming the solid-phase product (IV). The new process is particularly advantageous for the manufacture of homopolymers and copolymers having, for example, particularly advantageous morphological properties.

公开(公告)号：US4367321A

公开(公告)日：1983-01-04

申请号：US249680

申请日：1981-03-31

申请人： Robert Bachl ,  Peter Klaerner ,  Guenther Schweier ,  Ehler Ehlers

发明人： Robert Bachl ,  Peter Klaerner ,  Guenther Schweier ,  Ehler Ehlers

IPC分类号： C08F4/64 ,  C08F10/00 ,  C08F4/02

CPC分类号： C08F10/00 ,  Y10S526/906

摘要： A process for the preparation of homopolymers and copolymers of .alpha.-monoolefins by polymerizing the monomer or monomers with a Ziegler catalyst system comprising (1) a titanium-containing catalyst component and (2) a relevant conventional organo-aluminum compound, (1.1) the catalyst component (1) having been prepared by (1.1.1) milling a titanium compound (I) of the formula TiCl.sub.3.z(AlCl.sub.3) or Cl.sub.m Ti(OB).sub.4-m, where z is from 0 to 0.5, m is from 0 to 3 and B is alkyl, together with (1.1.2) a magnesium alcoholate (II) and, if desired, (1.1.3) a metal chloride (III) of the formula AlCl.sub.3, ZnCl.sub.2 or MnCl.sub.2, to form a milled product (IV), in which polymerization process a catalyst component (1) is employed, in the preparation of which (1.2) the milled product (IV) obtained according to (1.1) is brought together, in an additional step (1.2.1), with (1.2.2) an alkanol (V) and (1.2.3) a liquid alkane (VI), to form a suspension (VII), and thereafter (1.3), in a further additional step (1.3.1), there is added, to the suspension (VII) obtained according to (1.2), (1.3.2) a metal compound (VIII) of a certain type, the metal being aluminum, silicon or titanium, while preserving the suspension state, the product (IX), which results from stage (1.3) and is present as a solid phase in the suspension, constituting the titanium-containing catalyst component (1).

摘要翻译： 通过使单体或单体与齐格勒催化剂体系聚合制备α-单烯烃的均聚物和共聚物的方法，该齐格勒催化剂体系包含（1）含钛催化剂组分和（2）相关的常规有机铝化合物，（1.1） 催化剂组分（1）已经通过（1.1.1）研磨式TiCl 3·z（AlCl 3）或ClmTi（OB）4-m的钛化合物（I）制备，其中z为0至0.5，m为 0〜3，B为烷基，与（1.1.2）醇镁（II）以及（如果需要）（1.1.3）式AlCl 3，ZnCl 2或MnCl 2的金属氯化物（III）一起形成碾磨 其中使用催化剂组分（1）的聚合方法的产物（IV）在其制备中（1.2）根据（1.1）获得的研磨产物（IV）在另外的步骤（1.2.1 ）与（1.2.2）链烷醇（V）和（1.2.3）液态烷烃（VI）反应形成悬浮液（VII），此后（1.3）在另外的另外的步骤（1.3.1） ，其他 e）在保持悬浮状态的同时，向根据（1.2），（1.3.2）获得的悬浮液（VII）中加入某种金属化合物（VIII），金属为铝，硅或钛，同时保持悬浮状态 （IX），其由阶段（1.3）产生，并且作为固相以悬浮液形式存在，构成含钛催化剂组分（1）。

公开(公告)号：US4175170A

公开(公告)日：1979-11-20

申请号：US720777

申请日：1976-09-07

申请人： Guenther Schweier ,  Robert Bachl ,  Heinz Mueller-Tamm ,  Hans Frielingsdorf ,  Wolfgang Gruber ,  Erich Kolk

发明人： Guenther Schweier ,  Robert Bachl ,  Heinz Mueller-Tamm ,  Hans Frielingsdorf ,  Wolfgang Gruber ,  Erich Kolk

IPC分类号： C08F4/00 ,  B01J35/10 ,  C08F4/60 ,  C08F4/62 ,  C08F10/00 ,  C08F4/02 ,  C08F10/02

CPC分类号： C08F10/00

摘要： Manufacture of polymers of .alpha.-monoolefins by polymerization with a Ziegler catalyst system comprising (1) a catalyst component containing titanium and/or vanadium and (2) a particular compound of the metals aluminum, magnesium or zinc. The characteristic feature of the process according to the invention is that the catalyst component (1) containing titanium and/or vanadium is the solid-phase product (VII) contained by first (1.1) bringing a finely divided porous inorganic oxidic material (I), which has the formula Al.sub.2 O.sub.3 or SiO.sub.2.aAl.sub.2 O.sub.3, where a is a number from 0 to 2, into contact with an aluminum compound (II) dissolved in an organic solvent, to form a solid-phase product (III), then (1.2) bringing the solid-phase product (III) obtained in stage (1.1) into contact with a magnesium compound (IV), dissolved in an organic solvent, to form a solid-phase product (V), and finally (1.3) bringing the solid-phase product (V) obtained in stage (1.2) into contact with a compound (VI) of the transition metals titanium and/or vanadium to form a solid-phase product (VII). This process functions better than comparable conventional processes.

摘要翻译： 通过用齐格勒催化剂体系聚合制备α-单烯烃的聚合物，其包含（1）含有钛和/或钒的催化剂组分和（2）金属铝，镁或锌的特定化合物。 根据本发明的方法的特征在于，含有钛和/或钒的催化剂组分（1）是首先（1.1）所含的固体相产物（VII），使细碎的多孔无机氧化物质（I） ，其中a为0至2的数为Al 2 O 3或SiO 2·aAl 2 O 3，与溶于有机溶剂的铝化合物（II）接触，形成固相产物（III），然后（1.2 ）使得在阶段（1.1）中获得的固相产物（III）与溶解在有机溶剂中的镁化合物（IV）接触形成固相产物（V），最后（1.3） 在阶段（1.2）中获得的固相产物（V）与过渡金属钛和/或钒的化合物（VI）接触以形成固相产物（VII）。 该过程比可比较的常规方法更好。

公开(公告)号：US4568659A

公开(公告)日：1986-02-04

申请号：US666541

申请日：1984-10-30

申请人： Volker Warzelhan ,  Rainer Karer ,  Robert Bachl ,  Guido Funk

发明人： Volker Warzelhan ,  Rainer Karer ,  Robert Bachl ,  Guido Funk

IPC分类号： C08F4/02 ,  C08F4/62 ,  C08F4/64 ,  C08F4/68 ,  C08F10/00

CPC分类号： C08F10/00

摘要： A transition metal catalyst component (1) for Ziegler catalyst systems is prepared by (1.1) first combining (1.1.1) an inorganic oxidic substance (I), as the carrier, with (1.1.2) a solution (II) consisting of (IIa) an organic solvent and (IIb) a transition metal composition to form a suspension (III), evaporating down this suspension to form a solid-phase intermediate (IV) and (1.2) then combining (1.2.1) the solid-phase intermediate (IV) obtained from (1.1) with (1.2.2) a solution of an organoaluminum compound (V) to form a suspension, the resulting suspended solid-phase products (VI) being the transition metal catalyst component (1).The characteristic feature is that the solution (II) employed in stage (1.1) consists of (IIa) a certain oxahydrocarbon and (IIb) a mixture of (IIb1) a vanadium trichloride/alcohol complex, (IIb2) a titanium trihalide and (IIb3) a zirconium tetrahalide.

摘要翻译： 用于齐格勒催化剂体系的过渡金属催化剂组分（1）通过（1.1）首先将作为载体的无机氧化物质（I）与（1.1.2）由 （IIa）有机溶剂和（IIb）过渡金属组合物以形成悬浮液（III），将该悬浮液蒸发以形成固相中间体（IV）和（1.2），然后将（1.2.1） 由（1.1）与（1.2.2）得到的相变中间体（Ⅳ）与有机铝化合物（Ⅴ）的溶液形成悬浮液，得到的悬浮固相产物（Ⅵ）为过渡金属催化剂组分（ⅰ）。 特征在于，（1.1）中使用的溶液（II）由（IIa）某种氧杂烃和（IIb）（IIb1）三氯化钒/醇络合物，（IIb2）三卤化钛和（IIb3）的混合物 ）四卤化锆。

公开(公告)号：US4113933A

公开(公告)日：1978-09-12

申请号：US762858

申请日：1977-01-27

申请人： Gunther Schweier ,  Erich Kolk ,  Heinz Mueller-Tamm ,  Hans Frielingsdorf ,  Robert Bachl ,  Wolfgang Gruber

发明人： Gunther Schweier ,  Erich Kolk ,  Heinz Mueller-Tamm ,  Hans Frielingsdorf ,  Robert Bachl ,  Wolfgang Gruber

IPC分类号： C08F10/00 ,  C08F4/02 ,  C08F10/02

CPC分类号： C08F10/00

摘要： A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins of 2 to 6 carbon atoms by polymerizing the monomer or monomers by means of a Ziegler catalyst system comprising (1) a catalyst component containing titanium and (2) a particular compound of aluminum, magnesium or zinc, the atomic ratio of titanium from catalyst component (1) to metal (Me) from catalyst component (2) being from 1 : 0.1 to 1 : 500, wherein the titanium-containing catalyst component (1) employed is the solid-phase product (VI) obtained by (1.1) first bringing into contact (1.1.1) a particular finely divided, porous, inorganic oxidic material (I) and (1.1.2) a particular aluminum compound (II) dissolved in an organic solvent, to form a solid-phase product (III) and (1.2) then bringing into contact (1.2.1) the solid-phase product (III) obtained from stage (1.1) and (1.2.2) a solution (IV) which is obtained on bringing together (IVa) 100 parts by weight of a particular alcohol, (IVb) from 0.01 to 6 parts by weight (calculated as titanium) of a titanium trihalide and (IVc) from 0.01 to 4 parts by weight (calculated as magnesium) of a magnesium compound which is soluble in the alcohol (IVa), to form a dispersion (V), and evaporating the dispersion (V) until it has a dry consistency, thus forming the solid-phase product (VI). The new process is particularly advantageous for the manufacture of homopolymers and copolymers having, for example, particularly advantageous morphological properties.

公开(公告)号：US4042770A

公开(公告)日：1977-08-16

申请号：US631642

申请日：1975-11-13

申请人： Robert Bachl ,  Hans Frielingsdorf ,  Wolfgang Gruber ,  Heinz Mueller-Tamm ,  Leonhard Gonsior

发明人： Robert Bachl ,  Hans Frielingsdorf ,  Wolfgang Gruber ,  Heinz Mueller-Tamm ,  Leonhard Gonsior

IPC分类号： C08F4/00 ,  C08F4/06 ,  C08F10/00 ,  C08F4/02 ,  C08F4/24

CPC分类号： C08F10/00 ,  Y02P20/52

摘要： This invention relates to a process for the manufacture of olefin polymers by polymerization of monoolefins with the aid of a silicic xerogel/chromium trioxide catalyst obtained by (1) synthesizing a particulate silicic xerogel, (2) doping this xerogel with chromium trioxide or a chromium compound which converts to chromium trioxide under conditions of stage (3) and (3) maintaining the resulting product at an elevated temperature in a water-free oxygen-containing stream of gas. The characteristic feature of the process of the invention is that the silicic xerogel/chromium trioxide catalyst used is one obtained by (1) synthesizing the silicic xerogel in the first stage as follows: (1.1) taking an aqueous solution of a sodium silicate, (1.2) substituting substantially all of the sodium ions contained in said solution by hydrogen ions by means of an ion exchanger, (1.3) introducing a water-soluble aluminum salt into the resulting aqueous silicic acid solution, (1.4) adjusting the pH of the solution obtained in stage (1.3) to from 0.1 to 3.5, if necessary, (1.5) adjusting the solution obtained in (1.3) or (1.4) to a pH of from 4 to 12 by means of a nitrogen-base compound, (1.6) extracting the product forming the solid phase in stage (1.5) (silicic hydrogel) by means of an alkanol and/or alkanone until the organic liquid absorbs no more water and, finally, (1.7) drying the dehydrated gel saturated with organic liquid resulting from stage (1.6) (xerogel formation). This process makes it possible to obtain polymers having a satisfactory particle size distribution and a favorable melt index.

摘要翻译： 本发明涉及一种通过使用（1）合成硅氧烷干凝胶得到的硅胶干凝胶/三氧化铬催化剂，通过单烯烃的聚合制备烯烃聚合物的方法，（2）将这种干凝胶与三氧化铬或铬 在阶段（3）和（3）的条件下转化成三氧化铬的化合物在无水的含氧气流中保持所得产物在升高的温度。 本发明方法的特征在于，使用的硅干燥剂/三氧化铬催化剂是通过（1）在第一阶段合成硅干凝胶得到的催化剂如下：（1.1）取硅酸钠水溶液（ 1.2）通过离子交换器用氢离子基本上全部取代所述溶液中所含的所有钠离子，（1.3）将水溶性铝盐引入所得水性硅酸溶液中，（1.4）调节溶液的pH （1.3）中得到的化合物为0.1至3.5，如果需要，（1.5）通过氮碱化合物将（1.3）或（1.4）中获得的溶液调节至4至12的pH，（1.6） 通过链烷醇和/或烷酮萃取在阶段（1.5）（硅水凝胶）中形成固相的产物，直到有机液体吸收不再多的水，最后（1.7）干燥由有机液体饱和的脱水凝胶 阶段（1.6）（干凝胶形成）。 该方法可以获得具有令人满意的粒度分布和良好熔融指数的聚合物。