Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for preparing polyethylene glycol terephthalate by adopting anchoring agent

A technology of polyethylene terephthalate and tackifier, applied in the field of preparing polyethylene terephthalate with tackifier, can solve the problems of high energy consumption, achieve short polycondensation time, solve High energy consumption problem, good transparency effect

Inactive Publication Date: 2009-09-30
JIANGSU CHUNSHENTANG PHARMA
View PDF0 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the international advanced PTA method has become the main production process and development direction. The world's major polyester manufacturers are very representative: DuPont of the United States, ZIMMER of Germany, INVENTA of Switzerland, and Bell Spinning of Japan. However, the difference is that the United States DuPont adopts three-pot process (esterification kettle, pre-condensation kettle, final polycondensation kettle) technology, while other technologies are five-pot process (first esterification kettle, second esterification kettle, pre-condensation kettle, polycondensation kettle, final polycondensation kettle) kettle), however, no matter which way, there is a shortage of high energy consumption. According to industrialization data, the energy consumption required for the polycondensation process in the three-pot process accounts for about 50% to 60% of the energy consumption of the product, and the SSP consumption Energy accounts for about 30% to 40% of the energy consumption of products, and has become a key problem to be solved for the high energy consumption of polyester in the world today.

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
  • Method for preparing polyethylene glycol terephthalate by adopting anchoring agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Described adopt tackifier to prepare the method for polyethylene terephthalate as follows:

[0020] Using terephthalic acid and ethylene glycol as basic raw materials, prepare a slurry in a molar ratio of 1:1 to 2.5. After stirring evenly, add the slurry into the reaction kettle through a slurry pump for esterification reaction. The time is 0.5-6 hours, the temperature is 250-280°C, and the oligomer is generated; the oligomer after the esterification reaction is injected into the pre-condensation reactor through the oligomer pipeline through the pump, and the oligomer on the oligomer pipeline Additives should be added at the same time with a metering pump; the reaction temperature of the pre-condensation reactor is 270-296°C, the vacuum degree is 0.5-20mmHg, and the reaction time is 0.5-6 hours; the generated product enters the final polycondensation reactor, and the final polycondensation reactor The reaction temperature is 285-295° C., the vacuum degree is ≤1 mmHg, an...

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
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention relates to a method for preparing chemical, in particular to a method for preparing polyethylene glycol terephthalate by adopting anchoring agent. The method is as follows by the technical scheme provided by the invention: orthobenzene dicarboxylic acid and glycol which are taken as basic materials are prepared to be sizing agent at the mole ratio of 1:1-2.5 and the sizing agent is put in a reaction kettle for esterification reaction by a sizing agent pump to generate oligopolymer; the oligopolymer after the esterification reaction is injected in a prepolycondensate reaction kettle by a pump through an oligopolymer pipeline and additive is added to the oligopolymer pipeline simultaneously by a metering pump; and the generated product enters a final polycondensation reaction kettle with the temperature of 285-295 DEG C, the vacuum degree smaller than or equal to 1mm Hg for polycondensation reaction of 0.5-5 hour so as to form the polyethylene glycol terephthalate. The invention can shorten the polycondensation reaction time and SSP time.

Description

technical field [0001] The invention relates to a method for producing chemical products, in particular to a method for preparing polyethylene terephthalate with a tackifier. Background technique [0002] Polyethylene terephthalate (referred to as polyester, polyethylene terephthalate, PET) has excellent physical and chemical properties and a wide range of uses, and is now used in polyester fiber, food bottles, daily necessities bottle packaging (such as wine, beverage , edible oil, condiments, medicines, daily cosmetics, films, films, engineering plastics, etc.) have been applied. It has become the polyester product with the largest output and the most varieties, constantly replacing other plastics and fibers. The polyester industry has always been the focus of the development of my country's chemical fiber industry, with an annual growth rate of more than 10%. At present, the output of polyester in the world is 32.5 million tons, and the output of polyester in my country ...

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): C08G63/78C08G63/85C08G63/86C08G63/84C08G63/183
Inventor 陈美华陈晨陈冠华
Owner JIANGSU CHUNSHENTANG PHARMA
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
Eureka Blog
Learn More
PatSnap group products