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

Processing method of waste plastic

A treatment method and technology of waste plastics, applied in the direction of plastic recycling, recycling technology, etc., can solve the problems of complex product distribution, high reaction temperature, etc., and achieve the effects of simple process flow, lower reaction temperature, and simple preparation method

Active Publication Date: 2018-08-28
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY +1
View PDF6 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pyrolysis process itself requires high heat, the reaction temperature is usually high, and the distribution of its products is complex. Therefore, it is not only necessary to reduce the energy required for the decomposition reaction of waste plastics, but also to increase the proportion of specific types of products to improve the overall efficiency of waste plastics. The added value of plastic resource utilization is an important topic of current research

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
  • Processing method of waste plastic
  • Processing method of waste plastic

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0023] The preparation method of modified catalyst A used in the embodiment is: take 1g of HZSM-5 and HY molecular sieve respectively and mix, then add concentration and be that in the sodium hydroxide aqueous solution of 0.2mol / L, carry out partial desiliconization treatment, treatment temperature is 60°C for 1 hour, then filter, wash, and dry at 100°C for 12 hours; weigh 0.2g of tin chloride and 0.015g of sodium silicate plus deionized water to make an aqueous solution, and then dip into The above-mentioned composite molecular sieves were dried at 100°C for 12 hours, and then calcined at 450°C for 3 hours to obtain the modified catalyst A powder, which was pressed into tablets and sieved to obtain solid particles with a particle size of 40 mesh to 60 mesh. The particles were used as modified catalyst A.

[0024] The preparation method of modified catalyst B used in the embodiment is: change the tin chloride of 0.2g in the preparation method of modified catalyst A into the ti...

Embodiment 1

[0028] Get 2g polyethylene terephthalate plastics (PET) and join in the catalytic cracking reactor as the waste plastic raw material of reaction, and add modified catalyst A and reaction solvent, reaction solvent is 30wt% tetralin and 70wt% n-hexadecane A mixture of alkanes, wherein the amount of modified catalyst A added is 10% of the waste plastic mass, and the amount of reaction solvent is 2g. After mixing evenly, the reaction is carried out under the following reaction conditions: the reaction temperature is 250 ° C, and the reaction time is 180 minutes. The reaction was carried out under stirring with a stirring rate of 700 rpm, hydrogen gas was introduced into the reaction, and the hydrogen partial pressure was 5.6 MPa. The obtained cleavage product is separated by gas-liquid-solid to obtain liquid phase product, gas and insoluble matter; and then the obtained liquid phase product is extracted through cyclohexane and tetrahydrofuran respectively to obtain cyclohexane solu...

Embodiment 2

[0029] Change modified catalyst A in embodiment 1 into modified catalyst B, and others are the same as embodiment 1. The reaction results are shown in Table 1.

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

The invention discloses a processing method of waste plastic. The method comprises the following steps: adding the waste plastic, a modified catalyst and a reaction solvent into a catalytic pyrolysisreactor, so as to be uniformly mixed, and then performing catalytic pyrolysis reaction. The modified catalyst adopts a modifier oxide modified HZM-5 and HY composite molecular sieve, a modifier is selected from one or more in Sn, Fe, Ti and Zn, and the reaction solvent adopts a mixture of tetrahydronaphthalene and n-hexadecane. The conditions of the catalytic pyrolysis reaction are as follows: thereaction temperature is 150 to 300 DEG C; the reaction time is 120 to 240 minutes; the reaction is performed under stirring; the stirring speed is 600 to 1000 revolutions per minute; hydrogen is fedduring reaction; hydrogen partial pressure is 4 to 7MPa. The method obviously reduces the catalytic pyrolysis temperature of waste plastic on the promise of guaranteeing a high conversion rate, and saves energy.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, in particular to a treatment method for waste plastics. Background technique [0002] Energy shortage and environmental pollution are two major problems China is currently facing. The waste generated by the use of a large number of plastic products not only seriously pollutes the environment, but also causes a waste of resources. At present, the consumption of plastic products is huge, 80% of which are olefin polymers, and a large amount of waste plastics are produced every year, and the recycling rate of plastics is generally low, resulting in a huge waste of resources. In addition to burial, incineration and other methods that seriously pollute the environment, waste plastic pyrolysis technology is an important technology for the resource utilization of waste plastics. However, the pyrolysis process itself requires high heat, the reaction temperature is usually high, and the dist...

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
IPC IPC(8): C08J11/20C08J11/16
CPCC08J11/16C08J11/20C08J2323/06C08J2367/02Y02W30/62
Inventor 刘清龙罗明生张绍伟
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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