(19)
(11) EP 3 994 144 A1

(12)

(43) Date of publication:
11.05.2022 Bulletin 2022/19

(21) Application number: 20834639.5

(22) Date of filing: 03.07.2020
(51) International Patent Classification (IPC): 
C07F 17/00(2006.01)
C08F 4/659(2006.01)
 C08F 10/00(2006.01)
(52) Cooperative Patent Classification (CPC):
C08F 10/00; C07F 17/00; C08F 110/02; C08F 210/16
 
C-Sets:
  1. C08F 10/00, C08F 4/65927;
  2. C08F 210/16, C08F 210/14;
(86) International application number:
PCT/IN2020/050581
(87) International publication number:
WO 2021/001855 (07.01.2021 Gazette 2021/01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 04.07.2019 IN 201931026847

(71) Applicant: Haldia Petrochemicals Limited
Kolkata 700091 (IN)

(72) Inventors:
  • SENSARMA, Soumen
    Pune 411045 Maharashtra (IN)
  • KUNDU, Sandip Kumar
    Kolkata 700078 West Bengal (IN)
  • PATSA, Sumanta
    West Bengal Kolkata 700101 (IN)
  • ADHIKARY, Koushik
    West Bengal Dist- Howrah 711316 (IN)
  • MANNA, Joydeb
    Medinipur 721641 (IN)
  • GHOSH, Ranajit
    West Bengal Dist- Burdwan 713409 (IN)

(74) Representative: Barker Brettell LLP 
100 Hagley Road Edgbaston
Birmingham B16 8QQ
Birmingham B16 8QQ (GB)

   


(54) A NEW PROCESS FOR SYNTHESIZING C2 BRIDGED CYCLOPENTADIENYL LIGANDS AND CORRESPONDING ANSA-METALLOCENE CATALYSTS