A supported composite catalyst for producing high melt strength polypropylene

A high-melt strength, composite catalyst technology, applied in the field of polyolefin catalysts, can solve problems such as hindering long-chain branched structures, and achieve the effect of simplifying the preparation process and saving equipment investment and energy investment

Active Publication Date: 2016-03-16
CHINA PETROLEUM & CHEM CORP +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The compounding of dual catalysts in situ to prepare long-chain branched polyethylene is widely used, but it is rarely used in polypropylene, because for polypropylene, the diversity of insertion and termination methods hinders long-chain branching. structure formation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A supported composite catalyst for producing high melt strength polypropylene
  • A supported composite catalyst for producing high melt strength polypropylene
  • A supported composite catalyst for producing high melt strength polypropylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) The ZSM-5 molecular sieve material is used to prepare a carrier with an internal channel of 1.5 nm, a particle size of 5.0 μm, an external channel of 20 nm, and a thickness of 20 μm.

[0025] Activation of the carrier: 200 g of the carrier was taken, and dried at 200° C. for 2 hours under the protection of nitrogen flow, and then slowly raised to 600° C., and continued to dry for 4 hours to obtain a dehydrated carrier. The dehydrated carrier was dispersed in 5 L of hexane solvent, added with 0.14 mol of triethylaluminum, stirred at 30° C. for 2 hours, and then dried to obtain a treated carrier.

[0026] (2) Take 5mmol of iron acetylacetonate and 5mmol of bisiminopyridine ligand, and dissolve them in 100ml of toluene at room temperature. After they are completely dissolved, add 10g of the treatment carrier, raise the temperature to 50°C, and stir for 4h. Washed 3 times with toluene and dried under nitrogen blowing.

[0027] (3) Take 3.0g of magnesium dichloride, dis...

Embodiment 2

[0034] (1) Prepare a carrier with an inner channel of 1.5 nm, a particle size of 5.0 μm, an outer channel of 20 nm, and a thickness of 20 μm using diatomite material.

[0035] Activation of the carrier: 200 g of the carrier was taken, and dried at 200° C. for 2 hours under the protection of nitrogen flow, and then slowly raised to 600° C., and continued to dry for 4 hours to obtain a dehydrated carrier. Add 0.1 mol of triethylaluminum (for an alkylaluminum or alkylaluminum oxide) to the dehydration carrier in 5 L of hexane solvent dispersion, stir at 70° C. for 1 hour, and then dry to obtain a treated carrier.

[0036] (2) The obtained carrier is treated to reduce the loading amount of the late transition metal catalyst to prepare a composite catalyst. Compared with Example 1, the addition of iron acetylacetonate and bis-iminopyridine ligand is 2mmol, and the internal electron donor is ethyl benzoate, and other catalyst preparation conditions remain unchanged, the same as in E...

Embodiment 3

[0040] (1) A carrier with an inner channel of 1.2 nm, a particle size of 4.0 μm, an outer channel of 30 nm, and a thickness of 15 μm was prepared using montmorillonite materials.

[0041] Take 100 g of the carrier and dry it at 200° C. for 2 hours under the protection of nitrogen flow, then slowly raise the temperature to 600° C. and continue drying for 4 hours to obtain a dehydrated carrier. The dehydrated carrier was dispersed in 5 L of hexane solvent, added with 0.10 mol of triethylaluminum, stirred for 2 hours, and then dried to obtain a treated carrier.

[0042] (2) Take 3mmol of cobaltous chloride and 3mmol of bis-iminopyridine ligand, and dissolve them in 100ml of toluene at room temperature. After they are completely dissolved, add 10g of the treatment carrier, raise the temperature to 50°C, and stir for 4h. Washed 3 times with toluene and dried under nitrogen purge.

[0043] (3) Take 5.2g of magnesium dibromide, dissolve it in 200ml of ether at 60°C, add 1.2ml of phe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
diameteraaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

The invention discloses a supported composite catalyst for producing high melt strength polypropylene. The invention relates to a polyolefin catalyst which is prepared through the following steps: (1) preparing an inorganic support of which the internal pores are micropores and the external pores are mesoporous; (2) loading a late transition metal on the support by a dipping method, and drying; (3) independently dissolving the halide of magnesium in a polar solvent, and also adding a titanium compound and an internal electron donor; (4) pouring the solution obtained in the step (3) into the material obtained in the step (2), stirring, and then drying to obtain the catalyst. According to the invention, the high melt strength polypropylene can be obtained through in situ polymerization based on the preparation of the special catalyst; the subsequent polypropylene modification process is not required, so that the preparation process of the high melt strength polypropylene is simplified and the equipment investment and the energy investment also are saved.

Description

technical field [0001] The present invention relates to polyolefin catalysts, in particular to a supported Ziegler-Natta catalyst for the production of high melt strength polypropylene. Background technique [0002] Polypropylene (PP) resin has the characteristics of rich raw material sources, light weight, superior performance / price ratio, excellent heat resistance, chemical corrosion resistance, and easy recycling. It is one of the most widely used and fastest growing resins in the world. one. Polypropylene has low density, good mechanical properties, high temperature resistance, and excellent chemical stability. It is suitable for extrusion, injection molding, blow molding, and spinning, but it has defects in melt strength. This is mainly due to the general ZieglerNatta catalyst and Mao The polypropylene prepared by the metal catalyst has only a linear chain structure and is in a partially crystalline state, resulting in low melt strength and poor sag resistance. At the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C08F10/06C08F4/02C08F4/70
Inventor 梅利笪文忠胡庆云马广生
Owner CHINA PETROLEUM & CHEM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap