Preparation of propylene polymer-containing solid titanium trichloride and propylene polymers using same

Claim 2

A solid titanium trichloride catalyst containing a polymer of propylene produced by the process comprising: (a) forming a homogeneous solution comprising titanium trichloride and an ether; (b) heating said homogeneous solution at a temperature of lower than 150° C. to form a precipitate of solid titanium trichloride; (c) separating said precipitate; (d) mixing said separated precipitate, an inert solvent and an organoaluminum compound in a closed vessel; and (e) introducing propylene into said vessel for absorption into the liquid phase in said vessel at a feed rate within the range of 1 to 10 grams per hour per gram of said solid titanium trichloride, maintaining the partial pressure of said propylene in the gaseous phase in said vessel at less than 1 kg/cm 2 , the amount of propylene so introduced being controlled so that the amount of propylene absorbed is 0.1 to 50 times the weight of said solid titanium trichloride.

Claim 3

The solid propylene polymer-containing titanium trichloride of claim 1, produced by the process wherein the homogeneous solution further comprises a hydrocarbon solvent.

Claim 4

The propylene polymer-containing solid titanium trichloride of claim 1, produced by the process wherein the propylene is injected into the liquid phase within the vessel.

Claim 5

The propylene polymer-containing solid titanium trichloride of claim 3, produced by the process wherein the partial pressure of propylene in the gaseous phase is maintained at less than 0.2 kg/cm 2 .

Claim 6

The propylene polymer-containing solid titanium trichloride of claim 1, produced by the process wherein propylene is supplied into the gaseous phase in the vessel.

Claim 7

The propylene polymer-containing solid titanium trichloride of claim 5, produced by the process wherein the partial pressure of propylene in the gaseous phase is maintained at less than 0.6 kg/cm 2 .

Claim 8

The propylene polymer-containing solid titanium trichloride of claim 1, produced by the process wherein substantially no hydrogen is present within the reaction vessel.

Claim 9

The propylene polymer-containing solid titanium trichloride of claim 1, produced by the process wherein the propylene is supplied at a temperature of 0° to 70° C.

Claim 10

The propylene polymer-containing solid titanium trichloride of claim 1, produced by a process further comprising the steps of separating the propylene polymer-containing solid titanium trichloride produced in step (d) from the liquid phase and then washing with an inert solvent.

Claim 11

A propylene polymer-containing solid titanium trichloride of claim 1, produced by a process wherein the propylene is introduced with a small amount of at least one other α-olefin.

Claim 12

In a method of producing a propylene polymer the improvement comprising polymerizing the propylene in the presence of a catalyst admixture of (a) the propylene polymer-containing solid titanium trichloride of claim 1, and (b) an organoaluminum compound.

Claim 13

The method of claim 11, wherein the propylene is polymerized together with a small quantity of at least one other α-olefin in the presence of said catalyst admixture.

Claim 14

The method of claim 11, wherein propylene is polymerized at a temperature of 50° to 90° C. in the presence of said catalyst admixture.

Claim 15

The method of claim 11, wherein the propylene is polymerized under a partial pressure of propylene of 1 to 100 atm. in the presence of said catalyst admixture.

Claim 16

The method of claim 11, wherien the propylene polymer is produced in a yield of more than 5,000 times the weight of solid titanium trichloride in the presence of said catalyst admixture.

Claim 17

A process for producing a solid titanium trichloride containing a polymer of propylene comprising the steps of: (a) forming a homogeneous solution comprising titanium trichloride and an ether; (b) heating said homogeneous solution at a temperature of lower than 150° C. to form a precipitate of solid titanium trichloride; (c) separating said precipitate; (d) mixing said separated solid titanium trichloride, an inert solvent and an organoaluminum compound in a closed vessel; and (e) introducing propylene into said vessel for absorption into the liquid phase in said vessel at a feed rate within the range of 1 to 10 grams per hour per gram of said solid titanium trichloride, maintaining the partial pressure of said propylene in the gaseous phase in said vessel at less than 1 kg/cm 2 , the amount of propylene so introduced being controlled so that the amount of propylene absorbed is 0.1 to 50 times the weight of said solid titanium trichloride.

Claim 18

A process for producing a solid titanium trichloride containing a polymer of propylene comprising the steps of: (a) forming a homogeneous solution comprising titanium trichloride and an ether; (b) heating said homogeneous solution at a temperature of lower than 150° C. to form a precipitate of solid titanium trichloride; (c) separating said precipitate; (d) mixing said separated solid titanium trichloride, an inert solvent and an organoaluminum compound in a closed vessel; and (e) introducing propylene into said vessel for absorption into the liquid phase in said vessel at a feed rate within the range of 1 to 10 grams per hour per gram of said solid titanium trichloride, maintaining the partial pressure of said propylene in the gaseous phase in said vessel at less than 1 kg/cm 2 , the amount of propylene so introduced being controlled so that the amount of propylene absorbed is 0.1 to 50 times the weight of said solid titanium trichloride.