摘要:
PRETREATING OF A CATALYST UNDER POLYMERIZATION CONDITIONS WITH A SINGLE OLEFIN PRIOR TO ITS USE FOR COPOLYMERIZING A MIXTURE OF OLEFINS REDUCES THE LOW-MOLECULAR-WEIGHT AND AMORPHOUS MATERIAL FORMED DURING THE POLYMERIZATION PROCESS.
摘要:
A CATALYST SYSTEM COMPRISING (1) A MOLYBDENUM TRIHALO DICARBOXYLATE AND A MIXTURE OF (2) AN ORGANOMETALLIC COMPOUND OR A LITHIUM ALUMINUM HYDRIDE REPRESENTED BY THE FORMULAS RMA1C1N, LIA1HXR(4-X), AND RYM WHEREIN R IS A SATURATED ALIPHATIC, SATURATED CYCLOALIPHATIC, OR AROMATIC HYDROCARBON RADICAL OR COMBINATIONS THEREOF CONTAINING FROM 1 TO 20 CARBON ATOMS, M AND N ARE INTEGERS OF 1 OR 2 SUCH THAT M+N=3, X IS AN INTEGER OF FROM 0 TO 4, M IS LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CESIUM, BERYLLIUM, MAGNESIUM, ZINC, CADMIUM, ALUMINUM, GALLIUM, OR INDIUM, AND Y IS AN INTEGER EQUAL TO THE VALENCE OF THE METAL AND (3) A NICKEL COMPOUND SUCH AS NICKEL OXIDE, A NICKEL SALT OF AN ORGANIC OR INORGANIC ACID, A NICKEL SALT OF A BETA-DIKETONE, OR A COMPLEX COMPOUND OF NICKEL SUCH AS DICYCLOPENTADIENYLNICKEL, NICKEL TETRACARBONYL, OR THE NICKEL COMPLEX WITH THE ETHYL ESTER OF ACETOACETIC ACID OR AT LEAST ONE TRANSITION METAL COMPOUND OF TITANIUM, VANADIUM, CHROMIUM, MOLYBDEMUM, MANGANESE, COBALT OR IRON IS EMPLOYED FOR THE POLYMERIZATION OF BUTADIENE. POLYMERS RANGING FROM HIGH CIS TO HIGH VINYL CAN BE OBTAINED USING THE CATALYSTS OF THIS INVENTION. THE PRODUCTS CAN BE HYDROGENATED IMMEDIATELY FOLLOWING POLYMERIZATION WITH THE POLYMERIZATION CATALYST FUNCTIONING AS THE CATALYST FOR THE HYDROGENATION STEP.
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.
摘要:
CATALYSTS FOR THE POLYMERIZATION OF A-OLEFINS BASED ON THE REACTION PRODUCT OF HALIDES AND/OR ALKOXIDES OF METALS OF THE SUB-GROUPS IV TO VI OF THE MENDELEEV PERIODIC SYSTEM WITH SILICON COMPOUNDS CONTAINING HYDROGEN BOUND TO SILICON AND, OPTIONALLY WITH ALUMINUM HALIDES AND/OR ALKOXIDES AND/OR ALKYLS CHARACTERIZED IN THAT THE CATALYST IS PREPARED IN THE PRESENCE OF FROM 1 TO 500 GM. OF HEXAMETHYL- OR HEXAETHYL-BENZENE PER KILOGRAM OF THE OTHER CATALYST RAW MATERIALS, AS WELL AS THE PROCESS OF PREPARING THE CATALYSTS AND THE PROCESS OF POLYMERIZATION OF A-OLEFINS HAVING FROM 2 TO 6 CARBON ATOMS WITH THE SAID CATALYST.
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.
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:
PROCESS FOR THE POLYMERIZATION OF A-OLEFINS BY MEANS OF A MIXED CATALYST COMPOSED OF A PHOSPHORIC ACID-NALKYLAMIDE, A CYCLOPOLYALKENE, A HALOGEN COMPOUND OF TRIVALENT TITANIUM AND A HALOGEN-FREE ORGANO-ALUMINIUM COMPOUND. PRODUCTS OF IMPROVED STEREOSPECIFICITY ARE OBTAINED WITH A GOOD CATALYST-TIME-YIELD.
摘要:
WHEREIN R AND R2 REPRESENT INDEPENDENTLY MEMBERS SELECTED FROM THE GROUP CONSISITNG OF ALKYL GOUPS HAVING ONE TOO FIVE CARBON ATOMS, CYCLOHEXYL, PHENYL AND 1-NAPHTHYL; X1 AND X2 REPRESENT MEMBERS SELECTED FOM THE GROUP CONSISITNG OF ALKYLS HAVING ONE TO FIVE CARBON ATOMS, CYCLOALKYLS HAVING FOUR TO SIX CARBON ATOMS, PHENYL, P-TOYL AND HALOGENS SELECTED FROM THE GROUP CONSISTING OF CL, BR, AND I AND AT LEAST ONE OF X1 AND X2 REPRESENTS SAID HALOGEN, AND (B) AT LEAST ONE COMPOUND SELECTED FROM THE GROUP CONSISTING OF 1. TIX3P, VX3P, TIX34-Q(OR3)Q, VOX33-R(OR3)R AND VOX33 WHEREIN X3 REPRESENTS HALOGEN SELECTED FROM THE GROUP CONSISTING OF CL, BR, AND I; R3 REPRESENTS ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKYS HAVING ONE TO SIX CARBON ATOMS, CYCLOHEXYL, PHENYL AND P-TOYL; P IS AN INTEGER OF 2 TO 4, Q IS AN INTEGR OF 1 TO 3; R IS AN INTEGER OF 1 TO 2; AND 2. THE SOLID COMPOUNDS OBTAINED BY THE REACTION BETWEEN ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF TIX34, VX34, TIX34-Q(OR3)Q, VOX33-RAND VOX33 AND ONE MEMBER SELECTED FROM THE GROUP CONSISTING OF AIR4R(OR5)UX33-Y, SIR63H, (R7HSIO)G, R8R9R10SIO-(R11SIO)T-SIR10R9R8 AND A COMBINATION OF ONE MEMBER SELECTED FROM SIRR63H, (R7HSO)G AND R8R9R10SIO-(R11HSIO)T-SIR10R9R8 AND ONE MEMBER SELECTED FROM ALCL3, ALBR3AND FECL3 WHEREIN R3 AND X3 REPRESENT INDEPENDENTLY THE SAME GROUPS AS DEFINED ABOVE; R4 AND R5 REPRESENTS INDEPENDENTLY THE SAME GROUPS ABOVEDEFINED R3; R6, R7, R8, R9, R10 AND R11 REPRESENT INDEPENDENTLY THE SAME GROUPS AS ABOVE-DEFINED R1 OR R2; Q AND R REPRESENT INDEPENDENTLY THE SAME INTEGERS AS ABOVE-DEFINED; V IS AN INTEGER OF 1 TO 3, W IS 0 OR AN INTEGER OF 1 TO 2, Y IS AN TEGER OF 1 TO 3 AND V+N+Y=3; S IS AN INTEGER OF 3 TO 6+ T IS AT LEAST ONE AND THE VISOSITY OF R8R9R10SIO-(R11HSIO)TSIR10R9B8 IS AT MOST 2,000 CENTISTROKES, THE MOLE RATIO OF THE COMPOUND (A) TO THE COMPOUND (B) BEING 0.5 - 5 : 1.
R1R2HSIOALX1X2
THE POLYMERIZATION OF ETHYLENE AND THE COPOLYMERIAZTION OF ETHYLENE WTH ONE ALPHA-OLEFIN HAVING THREE TO 10 CARBON ATOMS IN THE PRESENCE OF A CATALYST PREPARED BY THE REACTION BETWEEN 8A) AT LEAST ONE COMPOUND OF THE GENERAL FORMULA;