Method for preparing pyrolysis oil by using waste polyolefin plastics and brominated flame-retardant waste plastics

A bromine-based flame retardant and waste polyolefin technology, which is applied in the preparation of liquid hydrocarbon mixtures, the treatment of hydrocarbon oils, and the petroleum industry to achieve the effects of reducing organic bromine content, realizing efficient recycling, and realizing synergistic resource utilization.

Active Publication Date: 2017-08-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not really convert organic bromine into inorganic bromine but only collects it, which needs further processing

Method used

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  • Method for preparing pyrolysis oil by using waste polyolefin plastics and brominated flame-retardant waste plastics
  • Method for preparing pyrolysis oil by using waste polyolefin plastics and brominated flame-retardant waste plastics
  • Method for preparing pyrolysis oil by using waste polyolefin plastics and brominated flame-retardant waste plastics

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In Example 1, the bromine-containing flame-retardant electronic waste plastic HIPS is used alone as the reaction raw material, and the method for preparing pyrolysis oil by pyrolysis includes the following steps:

[0031] Step (1): Bromine-containing flame-retardant electronic waste plastic HIPS is broken into small particles with a particle size between 75 μm and 250 μm.

[0032] Step (2): Weigh 10 g of small plastic particles obtained in step (1) and place in figure 1 in the fixed bed reactor shown.

[0033] Step (3): Flow at 500ml / min to figure 1 The device system shown is fed with high-purity nitrogen (purity not less than 99.999%) for 40 minutes to remove oxygen, water vapor and other impurity gases that affect pyrolysis in the system.

[0034] Step (4): Adjust the nitrogen flow rate to 100ml / min, and press figure 2The temperature curve shown (that is, first heat the reactor to 500 °C at a heating rate of 10 °C / min, keep the temperature for 1 hour, and then coo...

Embodiment 2

[0040] This embodiment 2 uses ABS waste plastics alone as the reaction raw material, and the specific steps are similar to those in embodiment 1, except that the HIPS in step (1) is replaced by ABS, and other steps are the same as in embodiment 1; the obtained ABS is heated separately The distribution of hydrolysis products and the content of bromine in pyrolysis oil are shown in Table 2.

[0041] Table 2 ABS separate pyrolysis product distribution and content of bromine in pyrolysis oil (wt%)

[0042] sample oil yield wax yield gas production rate Coke yield bromine content in oil ABS 57.5 18.3 11 13.2 7.1

Embodiment 3

[0044] In Example 3, waste olefin polymer plastic polypropylene PP and bromine-containing flame-retardant electronic waste plastic HIPS are used together as reaction raw materials, and the method for preparing pyrolysis oil by pyrolysis includes the following steps:

[0045] Step (1): The olefin polymer plastic polypropylene (PP) is crushed into small particles with a particle size between 75-250 μm.

[0046] Step (2): The bromine-containing flame-retardant electronic waste plastic HIPS obtained in step (1) in Example 1 and the olefin polymer plastic PP particles obtained in step (1) in Example 3 are mechanically processed according to a mass ratio of 9:1. Mix and mix evenly; then, place 10g of the evenly mixed plastic mixture in figure 1 in the fixed bed reactor shown.

[0047] Subsequent step (3), step (4), and step (5) are respectively consistent with step (3), step (4), and step (5) in Embodiment 1.

[0048] Table 3 shows the distribution of pyrolysis products of HIPS an...

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Abstract

The invention discloses a method for preparing pyrolytic oil from waste polyolefin plastic and brominated flame-retardant waste plastic. The method comprises the following steps: (1) separately breaking the brominated flame-retardant waste plastic and waste polyolefin plastic into brominated flame-retardant waste plastic particles and waste polyolefin plastic particles with particle sizes of 75-250mu m, and uniformly mixing the brominated flame-retardant waste plastic particles and waste polyolefin plastic particles to obtain a pyrolytic reaction raw material; and (2) putting the pyrolytic reaction raw material into a fixed-bed reactor, heating to 500 DEG C for a pyrolytic reaction, condensing the gas obtained by the pyrolytic reaction, and filtering and collecting the pyrolytic oil. In the invention, the problems in recycling brominated flame-retardant waste plastic can be effectively solved, the bromine content of the obtained pyrolytic oil is low, and the pyrolytic oil can be used as environment-friendly fuel.

Description

technical field [0001] The invention belongs to the fields of environmental protection and energy utilization, and more specifically relates to a method for preparing pyrolysis oil by using waste polyolefin plastics and brominated flame-retardant waste plastics. The method is to combine waste polyolefin plastics with brominated waste plastics Flame-retardant waste plastics are blended with pyrolysis and debromination to prepare pyrolysis oil, which effectively controls the content of organic bromine in the pyrolysis oil, improves the quality of the pyrolysis oil, and enables the pyrolysis oil to be used as an environmentally friendly fuel. A method for efficient resource utilization of brominated flame-retardant waste plastics that inhibits the formation of brominated dioxin-like pollutants. Background technique [0002] At present, the output of waste electronic appliances in my country has reached 5.52 million tons, of which electronic waste plastics account for 30% of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1003
Inventor 孙路石马川王贲于洁向军胡松周长松
Owner HUAZHONG UNIV OF SCI & TECH
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