Patent ID: 11857935
Assignee: DOW GLOBAL TECHNOLOGIES LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 11:
12. A process for making a procatalyst, the process comprising:
thermally treating a magnesium chloride slurry at a treatment temperature of at least 100° C. and for at least 30 minutes, the magnesium chloride slurry comprising at least magnesium chloride (MgCl2) dispersed in a solvent; and
combining a chlorinating agent and a titanium species with the magnesium chloride slurry, the chlorinating agent having a structure A(Cl)x(R1)3-x, where:
A is aluminum or boron;
R1 is (C1-C30)hydrocarbyl; and
x is 1, 2, or 3;

wherein thermally treating the magnesium chloride slurry occurs before combining the chlorinating agent and the titanium species with the magnesium chloride slurry.