Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A green supercritical fluid method for efficient and simultaneous removal of odors and vocs from plastics

A supercritical fluid and plastic technology, applied in the production of bulk chemicals, etc., can solve the problems of time-consuming, unsatisfactory effect, unfavorable mass transfer and heat transfer, etc., and achieve the effect of eliminating pungent smell and eliminating physical injury

Active Publication Date: 2019-05-14
SUZHOU SUNWAY POLYMER
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (2) Enhanced devolatilization methods such as multi-stage vacuum and drying materials. Through this treatment process, the odor and VOCs content can also be improved to a certain extent, but this treatment process has complex process flow, high energy consumption, and limited removal rate. Disadvantages such as high cost and low efficiency are not easy to be widely used
In addition, it is well known that the diffusion of fluid on the inner and outer surfaces of polypropylene pellets and the heat transfer in the device are very important in the extraction process, and the mass and heat transfer efficiency of the fluid in the system is directly related to the flow state of the fluid. Static extraction is obviously not conducive to the mass and heat transfer process in the system
Therefore, it is obvious that this technology has defects such as time-consuming, high energy consumption, poor mass and heat transfer effect, and low processing capacity in industrial applications.
[0020] In summary, although the existing methods and technologies have improved the odor problem of polypropylene materials and reduced VOCs to a certain extent, the effect is not ideal, and there are complex process equipment, long processing time, high energy consumption, and processing Low capacity, poor adaptability to raw material types and other deficiencies cannot meet the needs of industrial processing of different raw material types and industrial production. Therefore, it is urgent to invent a new green method that efficiently removes odor and VOCs in plastics at the same time

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Accurately weigh the polypropylene composite material particle (its mass percentage is made up of: 65% polypropylene, 20% talcum powder, 0.2% antioxidant 168, 0.4% antioxidant 1010, 14.4% polyolefin elasticity that size is 3~4mm) Body) 50±0.0001g, put into a 100mL high-pressure container, put CO 2 After the gas is cooled, it is transported to the high-pressure container through the high-pressure liquid pump, so that the CO 2 The pressure reaches 20MPa, after static treatment at 80°C for 40min, the temperature is raised to 100°C, in CO 2 Under the condition of the flow rate of 5L / min and the pressure of 20MPa, the dynamic treatment is 240min. Turn off the heating system, lower the temperature of the high-pressure container system to room temperature, and stop feeding CO 2 , and slowly release the gas to reduce the pressure to normal pressure, open the high-pressure container to collect the processed polypropylene composite material particles, and obtain polypropylene c...

Embodiment 2

[0040] Accurately weigh the polypropylene composite material particle (its mass percentage is made up of: 65% polypropylene, 20% talcum powder, 0.2% antioxidant 168, 0.4% antioxidant 1010, 14.4% polyolefin elasticity that size is 3~4mm) Body) 50±0.0001g, put into a 100mL high-pressure container, put CO 2 After the gas is cooled, it is transported to the high-pressure container through the high-pressure liquid pump, so that the CO 2 The pressure reaches 15MPa, after static treatment at 80°C for 40min, the temperature is raised to 100°C, and the 2 Under the conditions of the flow rate of 5L / min and the pressure of 15MPa, the dynamic treatment is 240min. Other steps are the same as in Example 1, the total carbon content of the polypropylene composite material particles is reduced from 18.6 μg / g to 0.30 μg / g, and the VOCs removal rate is 98.4%; the odor level of the polypropylene composite material particles is reduced from 4.5 to 3.5 class.

Embodiment 3

[0042] Accurately weigh the polypropylene composite material particle (its mass percentage is made up of: 65% polypropylene, 20% talcum powder, 0.2% antioxidant 168, 0.4% antioxidant 1010, 14.4% polyolefin elasticity that size is 3~4mm) Body) 50±0.0001g, put into a 100mL high-pressure container, put CO 2 After the gas is cooled, it is transported to the high-pressure container through the high-pressure liquid pump, so that the CO 2 The pressure reaches 25MPa, after static treatment at 80°C for 40min, the temperature is raised to 100°C, in CO 2Under the condition of the flow rate of 5L / min and the pressure of 25MPa, the dynamic treatment is 180min. Other steps are the same as in Example 1, the total carbon content of the polypropylene composite material particles is reduced from 18.6 μg / g to 0.51 μg / g, and the VOCs removal rate is 97.3%; the odor level of the polypropylene composite material particles is reduced from 4.5 to 3.5 class.

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
diameteraaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a supercritical fluid green method for efficiently and simultaneously removing odor and VOCs (volatile organic chemicals) in plastics. The method includes the steps: firstly, performing static treatment on the plastics by supercritical fluids at the temperature of 30-200 DEG C and under the pressure of 0.1-40MPa; secondly, adopting continuous flow dynamic treatment at the temperature of 40-320 DEG C, under the pressure of 0.2-45MPa and with the supercritical fluid flow of 0.1-20L / min. The whole technological process is simple and easy to operate, the used supercriticalfluids are easily obtained, green and environmentally friendly, and the VOCs in the plastics can be efficiently removed, so that the odor of the plastics is effectively eliminated. By the aid of the method, the odor level of polypropylene, nylon, PC (polycarbonate) / ABS (acrylonitrile butadiene styrene) and composite materials thereof is reduced from 4.5 to 3.5, the total carbon of the VOCs in thepolypropylene and the composite material thereof can be at most reduced by 98.4%, the total carbon of the VOCs in the nylon and the composite material thereof can be reduced by 92%, the total carbon of the VOCs in the PC / ABS composite material can be reduced by 89.5%, and the performance of the treated plastics does not have any change.

Description

technical field [0001] The invention belongs to the technical field of supercritical fluid green chemistry and chemical engineering, and relates to a plastic environmental protection material, in particular to a supercritical fluid green method for efficiently and simultaneously removing odor and volatile organic compounds (VOCs) in plastics. Background technique [0002] Plastics have been widely used in various fields such as agriculture, industry, transportation, packaging, construction, medical supplies, defense cutting-edge industries and people's daily life, especially the global automobile production industry is inseparable from the use of high-grade plastics. As China has become the world's largest automobile production and sales market, the environmental protection and health awareness of drivers and passengers has gradually increased, and the air pollution inside automobiles has attracted more and more attention. Considering the health and safety of drivers and pas...

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): C08J3/00C08L23/12C08L77/00C08L69/00C08L55/02
CPCC08J3/00C08J2323/12C08J2369/00C08J2377/00C08J2455/02Y02P20/54
Inventor 任俊
Owner SUZHOU SUNWAY POLYMER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com