公开(公告)号：US3843620A

公开(公告)日：1974-10-22

申请号：US25389372

申请日：1972-05-16

申请人： WACKER CHEMIE GMBH

发明人： PIEKARSKI G ,  HUNDMEYER A

IPC分类号： C08F10/00 ,  C08F1/44 ,  C08F3/06

CPC分类号： C08F10/00 ,  Y10S526/907 ,  Y10S526/909 ,  C08F4/00

摘要： A process for the production of polyethylene powder of high density and tap high density comprising polymerizing ethylene at a temperature of from 20*C to 200*C and a pressure of from 1 to 100 atmospheres in the presence of a catalyst prepared from (a) organo-silicon compounds with silicon-hydrogen bonds, (b) compounds of heavy metals of the IV to VI sub-group of the Periodic System, and (c) optionally, compounds of metals of the III main group of the Periodic System characterized in that the prepared catalyst, before polymerization, is treated at a temperature from -40*C to +60*C with oxygen for a time sufficient that from 1 percent to 70 percent, preferably from 5 percent to 50 percent of the compounds of heavy metals of the IV to VI subgroups of the Periodic System present in a lower valence are oxidized to their highest valence and, optionally, the oxidized catalyst is further activated by the addition of monomeric and/or polymeric organic compounds of silicon and/or tin.

公开(公告)号：US3775389A

公开(公告)日：1973-11-27

申请号：US3775389D

申请日：1971-06-14

申请人： WACKER CHEMIE GMBH

发明人： HUNDMEYER A ,  LOCHNER F ,  PIEKARSKI G

IPC分类号： C08F10/00 ,  C08F1/44 ,  C08F1/88

CPC分类号： C08F10/00 ,  Y10S159/10 ,  C08F2/38

摘要： D R A W I N G
A PROCESS FOR THE PURIFICATION OF POLYOLEFINS POLYMERIZED IN THE PRESENCE OF A CATALYST SYSTEM OF SILICON COMPOUNDS WITH SILICONHYDROGEN COMPOUNDS, METAL COMPOUNDS OF SUBGROUPS IV TO VI OF THE PERIODIC TABLE AND, OPTIONALLY, OF THE MAIN GROUP III OF THE PERIODIC TABLE, AND IN THE PRESENCE OF INERT ORGANIC SOLVENTS WHICH CONSISTS IN THE STEPS OF (1) UTILIZING, AS SAID INERT ORGANIC SOLVENT AND AS THE PURIFICATION SOLVENT, A SOLUTION OF SATURATED HYDROCARBONS HAVING 6 TO 9 CARBON ATOMS AND A CONSTANT BOILING POINT, (2) DECOMPOSIING A POLYOLEFIN SUSPENSION IN SAID SOLVENT CONTAINING SAID CATALYST SYSTEM BY THE ACTION OF SAID SOLVENT CONTAINING FROM 1% TO 40% BY VOLUME OF AN ALKANOL HAVING 2 TO 3 CARBON ATOMS AND MIXTURES THEREOF, UNDER A DRY GAS ATMOSPHERE AT A TEMPERATURE OF FROM 50*C. TO 100*C., (3) SEPARATING MOIST POLYOLEFIN FROM SAID SOLVENT, (4) WASHING SAID MOIST POLYOLEFIN WITH SAID SOLVENT CONTAINING FROM 0 TO 40% BY VOLUME OF AN ALKANOL HAVING 2 TO 3 CARBON ATOMS AND MIXTURES THEREOF AT A TEMPERATURE OF FROM 50*C. TO 100*C., (5) CONTINUOUSLY DRYING SAID WASHED MOIST POLYOLEFIN, AND (6) RECOVERING PURIFIED POLYOLEFINS SUBSTANTIALLY FREE OF ASH AND LOW MOLECULAR WEIGHT POLYMERS. OPTIONALLY, (1) THE POLYOLEFIN SUSPENSION FROM THE POLYMERIZATION MAY BE SEPARATED FROM THE INERT SOLVENT AND WASHED WITH THE SOLVENT MIXTURE BEFORE THE DECOMPOSING STEP, (2) THE WASHED MOIST POLYOLEFIN MAY BE PULPED WITH THE SOLVENT ALCOHOL MIXTURE, THE SUSPENSION SEPARATED AND THE MOIST POLYOLEFIN AGAIN WASHED WITH THE SOLVENT ALCOHOL MIXTURE, (3) THE DECOMPOSING STEP MAY BE CONDUCTED IN THE PRESENCE OF SMALL AMOUNTS OF AIR OR OXYGEN AND (4) THE CONTINUOUS DRYING STEP MAY BE CONDUCTED IN THE PRESENCE OF SMALL AMOUNTS OF STEAM.

公开(公告)号：US3755274A

公开(公告)日：1973-08-28

申请号：US3755274D

申请日：1972-05-16

申请人： WACKER CHEMIE GMBH

发明人： KIPPE D ,  MAIER S ,  PIEKARSKI G ,  HUNDMEYER A

IPC分类号： C08F10/02 ,  C08F4/58 ,  C08F4/626 ,  C08F10/00 ,  C08F110/02 ,  C08G77/38 ,  C08F1/44 ,  C08F3/06

CPC分类号： C08G77/38 ,  C08F10/00 ,  C08F4/6265

摘要： A catalyst for the production of polyethylene and modified polyethylene having a narrow molecular weight distribution comprising the reaction product of (A) a reaction product of one mol of trialkyl aluminum having from two to eight carbon atoms in each of the alkyls with from one to two mols of a polysiloxane having a viscosity of from 5 to 100 cSt (25*C) and monomer units having the formula

WHERE R is alkyl having one to six carbon atoms, cycloalkyl or aryl and (B) a compound of the formulae

摘要翻译： 用于生产具有窄分子量分布的聚乙烯和改性聚乙烯的催化剂包括（A）在每个烷基中具有2至8个碳原子的1摩尔三烷基铝的反应产物与1至2的反应产物 具有粘度为5至100cSt（25℃）的聚硅氧烷的摩尔数和式WHERE R为具有1至6个碳原子的烷基的单体单元，环烷基或芳基和（B）式TiX4-n的化合物 （OR'）n，VOX 3-n（OR'）n和VX 4-n（OR'）n其中X是卤素，R'是具有1-8个碳原子的烷基或环烷基，n具有在0.1和2之间的值 ，或所述化合物的混合物，以及利用所述反应产物催化剂制备具有窄分子量分布的聚乙烯和改性聚乙烯的方法。