# US 2014/0155560 A1 · Nitrogen containing external donor system for propylene polymerization

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- Number: US 2014/0155560 A1
- Document ID: US20140155560A1
- Status: Published application
- Kind: A1
- Application number: 14/116,467
- Filed: 2012-05-07
- Published: 2014-06-05
- Earliest claimed: 2011-05-09
- Assignees: Reliance Industries Limited
- Inventors: Harshad Ramdas Patil; Priyanshu Bharatkumar Vyas; Virendrakumar Gupta
- Web page: https://patentgrep.com/patent/US20140155560A1

## CPC

- C08F 110/06: Propene
- C08F 10/06: Propene
- Y02P 20/52: using catalysts, e.g. selective catalysts
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention discloses new class of nitrogen containing external donor systems. These donor systems are used in titanium supported on magnesium dichloride pro-catalyst system for polymerization of propylene. The external donor systems of the present invention in combination with silane show the kinetics control for diester catalyst polymerization process along with stereo regularity control of product. The polypropylene produced using nitrogen containing external donor systems of the present invention have broad molecular weight distribution.

## Claims

### Claim 1

A catalyst system for polymerization of propylene comprising:
(a) a titanium supported on magnesium dichloride pro-catalyst carrying internal donor;
(b) organoaluminium co-catalyst; and
(c) external donor comprising pentamethyldiethyltriamine and an alkoxy silane.

### Claim 2 (depends on 1)

The catalyst system as claimed in claim 1, wherein said titanium supported magnesium dichloride procatalyst comprises 2.0 to 3.4 wt % Ti, 17 to 18 wt % Mg, 13 to 18 wt % ethylbenzoate, 8-16 wt % diisobutyl phthalates and 0.1 to 0.5wt % ethoxy.

### Claim 3 (depends on 1)

The catalyst system as claimed in claim 1, wherein aluminium of said organoaluminium co-catalyst to external electron donor molar ratio is in the range of 40 to 260.

### Claim 4 (depends on 1)

The catalyst system as claimed in claim 1, wherein said internal donor is a monocarboxylic acid ester or dicarboxylic acid ester.

### Claim 5 (depends on 4)

The catalyst system as claimed in claim 4, wherein monocarboxylic acid ester is ethyl benzoate.

### Claim 6 (depends on 4)

The catalyst system as claimed in claim 4, wherein dicarboxylic acid ester is diisobutyl phthalate.

### Claim 7 (depends on 1)

The catalyst system as claimed in claim 1, wherein said organoaluminium cocatalyst is triethyl aluminium.

### Claim 8 (depends on 1)

The catalyst system as claimed in claim 1, wherein the molar ratio of pentamethyldiethyltriamine and silane is in the range of 30:70 to 70:30.

### Claim 9 (depends on 1)

The catalyst system as claimed in claim 1, wherein the molar ratio of pentamethyldiethyltriamine and silane is 50:50.

### Claim 10 (depends on 1)

The catalyst system as claimed in claim 1 wherein said silane is selected from the group consisting of n-propyl trimethoxy silane, dicyclopentyl dimethoxy silane and cyclohexyl methyl dimethoxy silane.

### Claim 11 (depends on 1)

A process for polymerization of propylene comprising contracting propylene with the catalyst as claimed in claim 1.

### Claim 12 (depends on 11)

The process as claimed in claim 11 wherein the process is performed in slurry phase or in gas phase.

### Claim 13

(canceled)