US 11,851,506 B2
Process for preparation of a catalyst for polymerization of olefins
Gurmeet Singh, Haryana (IN); Rashmi Rani, Haryana (IN); Sukhdeep Kaur, Haryana (IN); Yajnaseni Biswas, Haryana (IN); Anju Chopra, Haryana (IN); Gurpreet Singh Kapur, Haryana (IN); and Sankara Sri Venkata Ramakumar, Haryana (IN)
Assigned to Indian Oil Corporation Limited, Mumbai (IN)
Filed by Indian Oil Corporation Limited, Maharashtra (IN)
Filed on Sep. 27, 2022, as Appl. No. 17/953,459.
Claims priority of application No. 202121043762 (IN), filed on Sep. 27, 2021.
Prior Publication US 2023/0159676 A1, May 25, 2023
Int. Cl. C08F 110/02 (2006.01); C08F 4/654 (2006.01)
CPC C08F 110/02 (2013.01) 9 Claims
 
1. A process for preparation of a catalyst for polymerization of olefins, the process comprising:
(a) contacting a liquid magnesium complex, an electron donor compound and a titanium halide compound to form a solution at a temperature ranging from 0-25° C. for 1-10 hours;
(b) precipitating the solution to obtain catalyst particles by
(i) providing a first temperature ramp of 0.1-10° C./minute at a temperature ranging from 5-25° C.
(ii) holding for at least 15 minutes;
(iii) providing a second temperature ramp of 0.1-10° C./minute at a temperature ranging from 25-45° C.;
(iv) holding for at least 30 minutes;
(v) providing a third temperature ramp of 0.1-10° C./minute at a temperature ranging from 45-110° C.; and
(vi) holding for at least 15 minutes at a temperature of 75° C.; and
(c) washing the catalyst particles with an inert solvent to obtain a solid uniform catalyst.