A continuous production method for highly isotactic poly(1-butene)

A technology of isotactic polybutene and production method, which is applied in the field of high molecular polymers, can solve problems such as failure to meet the needs of downstream users, the impact of deep processing of downstream products, and large fluctuations in product quality, so as to achieve good transportability and ensure product quality. The effect of continuous and stable quality and product quality

Inactive Publication Date: 2017-03-22
山东省滕州瑞达化工有限公司
View PDF1 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In batch production, the product quality fluctuates greatly between batches, and the molecular weight distribution of the product is wide, which affects the deep processing of downstream products and cannot meet the needs of downstream users.

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 continuous production method for highly isotactic poly(1-butene)
  • A continuous production method for highly isotactic poly(1-butene)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1) Add 1-butene monomer figure 2 When the polymerization reactor shown reaches a certain liquid level, stop feeding, control the temperature rise program to heat the temperature to 10°C, and control the system pressure at 0.2Mpa by nitrogen; start stirring and then add the supported titanium catalyst, co-catalyst and external feed according to a certain proportion. Electron body, add hydrogen at the same time, the content of hydrogen in the gas phase material is 1ppm. Time to 4 hours.

[0049] 2) By controlling the feed rate, the 1-butene monomer, catalyst, cocatalyst, and external electron donor are fed according to the same ratio as in step 1), and the system pressure is adjusted to maintain 0.2Mpa, and the hydrogen is in the gas phase material The content is 1ppm, and at the same time, the outlet valve at the bottom of the reactor is opened to send the reaction materials to the flash tank to ensure that the materials in the reactor reach an equilibrium state. Afte...

Embodiment 2

[0051] 1) Add 1-butene monomer figure 2 The polymerization reactor shown in the figure stops feeding when it reaches a certain liquid level, controls the temperature rise program to heat the temperature to 50°C, and controls the system pressure at 1.0Mpa by helium; start stirring and then add the supported titanium catalyst, co-catalyst and external catalyst according to a certain proportion. Electron donor, while adding hydrogen, the content of hydrogen in the gas phase material is 1000ppm. Count down to 2.5 hours.

[0052] 2) By controlling the feed rate, start feeding 1-butene monomer, catalyst, cocatalyst, and external electron donor according to the same ratio as in step 1), adjust the system pressure to maintain 1.0Mpa, and hydrogen is in the gas phase material The content in the reactor is 1000ppm, and at the same time, the discharge valve at the bottom of the reactor is opened to send the reaction material to the flash tank to ensure that the material in the reactor ...

Embodiment 3

[0054] 1) Add 1-butene monomer figure 2 When the polymerization reactor shown reaches a certain liquid level, stop feeding, control the temperature rise program to heat the temperature to 55°C, and control the system pressure at 2.3Mpa by methane; start stirring and then add the supported titanium catalyst, co-catalyst and external feed according to a certain proportion. Electron body, add hydrogen at the same time, the content of hydrogen in the gas phase material is 100ppm. Count down to 1.5 hours.

[0055] 2) By controlling the feed rate, the 1-butene monomer, catalyst, cocatalyst, and external electron donor are fed according to the same ratio as in step 1), and the system pressure is adjusted to maintain 2.3Mpa, and the hydrogen is in the gas phase material The content is 100ppm, and at the same time, the discharge valve at the bottom of the reactor is opened to send the reaction material to the flash tank to ensure that the material in the reactor reaches an equilibriu...

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

No PUM Login to view more

Abstract

A continuous production method for highly isotactic poly(1-butene) is provided in embodiments of the invention and belongs to the field of polymers. Continuous stable production of the highly isotactic poly(1-butene) is achieved, continuous stability of product quality can be ensured and the molecular weight distribution of products is controlled. The method includes S1) adding a 1-butene monomer, a catalyst, a cocatalyst and an external electron donor into a polymerization reactor in order, and performing polymerization at 10-85 DEG C under 0.2-2.6 MPa with hydrogen being adopted as a molecular weight adjusting agent, reaction residence time being 1-4 h and the content of the hydrogen in a gaseous material being 1-1000 ppm; and S2) charging according to a ratio same as the ratio in the steps S1), controlling the content of the hydrogen in the gaseous material to be 1-1000 ppm, continuing polymerization, discharging the reaction material from the polymerization reactor at the same time, and removing the unreacted 1-butene monomer from the discharged reaction material through flash evaporation to obtain the highly isotactic poly(1-butene). The method can be used for industrial production of the highly isotactic poly(1-butene).

Description

technical field [0001] The invention relates to the field of high molecular polymers, in particular to a continuous production method of high isotactic polybutene-1. Background technique [0002] Polybutene-1 (Polybutene-1) is an isotactic polymer homopolymer of 1-butene monomer, which can be polymerized by 1-butene monomer and catalyst in a reactor. Often referred to as "plastic gold", it is suitable for sheet, film and tubing. [0003] The liquid-phase method for synthesizing polybutene-1 can be divided into bulk method and slurry method. Among them, the slurry method is a method for preparing isotactic polybutene-1 by using an inert solvent such as alkane as a diluent to carry out slurry polymerization. Compared with the gas phase method, the slurry method has a faster reaction rate, and the operating conditions affecting the reaction are easy to monitor and control. However, due to the addition of a large amount of inert solvent in this method, the inert solvent and u...

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 Applications(China)
IPC IPC(8): C08F110/08C08F4/649C08F4/646C08F2/38
CPCC08F110/08C08F2/38C08F4/6494C08F4/6465C08F2500/15
Inventor 李瑞斋齐世锋
Owner 山东省滕州瑞达化工有限公司
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