Thermal de-polymerization process of plastic waste materials

A waste and plastic technology, applied in the field of catalytic thermal depolymerization, can solve the problems of high maintenance cost and expensive technology

Inactive Publication Date: 2014-06-04
SYNGAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the method is a multi-step process that requires the complete breakdown of waste plastics into hydrocarbon oils under high temperature and pressure conditions, this technique is quite expensive
In addition, additional steps are required, such as removing coke deposited in the fluidized bed by burning at 600 to 900°C, which results in high maintenance costs

Method used

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  • Thermal de-polymerization process of plastic waste materials

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Embodiment Construction

[0014] The purpose, construction, features and functions of the present invention can be better understood with reference to the detailed embodiments given below.

[0015] The invention relates to a process (100) for thermal depolymerization of waste materials, especially plastic waste (10), into liquid transport fuels (15) by using limestone (20) as a catalyst. Waste plastics (10) according to the present invention are municipal and / or industrial wastes, including but not limited to polyethylene, polypropylene and polyvinyl chloride.

[0016] In one embodiment of the present invention, the limestone catalyst (20) is obtained by sintering the following solid composition, which contains: 39% to 41% alumina (Al 2 o 3 ); 30% to 32% calcium oxide (CaO); 0.09% to 0.12% silicon monoxide (SiO); 0.01% to 0.03% magnesium oxide. Preferably, the solid composition contains 40.6% ± 0.1 alumina (Al 2 o 3 ); 31.7%±0.1 of calcium oxide (CaO); 0.15%±0.01 of silicon monoxide (SiO); and 0.03...

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Abstract

The present invention relates to a process for producing liquid transportation fuel (15) based on plastic waste materials (10), comprising the step of: providing (S101) plastic waste materials (10) in molten form; de-polymerizing (S103) molten plastic waste materials (10) into a reaction chamber using a limestone catalyst (20) at a temperature ranging 420 DEG C to 450 DEG C under normal atmospheric pressure condition of 1 Bar; and introducing (S106) gaseous de- polymerized products (25) to a distillation unit thereby allows the gaseous de-polymerized products (25) to be fractionally distilled and condensed into liquid transportation fuels (15).

Description

technical field [0001] The invention relates to a method for catalytic thermal depolymerization of waste plastics, in particular to using a solid catalyst to convert plastic wastes into high-quality liquid fuels without affecting the output. Background technique [0002] In most traditional waste plastic disposal methods, plastic waste is generally incinerated, buried or landfilled, and the gradual awareness of the resulting environmental and health problems drives contemporary scientists and inventors to develop more environmentally friendly Waste management treatment scheme one pyrolysis and depolymerization of plastic waste. [0003] Unlike current waste plastic processing methods, cracking and depolymerization methods can successfully recover specific resources, crude oil and / or natural gas, from waste plastic. Therefore, such a waste treatment method can make waste plastics be reused instead of being degraded in nature, which still does not solve the problem of the inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/00C10J1/10C07C4/06C10L1/02
CPCC10G2300/201C10G2400/04C10G2300/202C10G2300/1003C10G1/10C08J11/14C08J11/12C10G2300/4012C10G2300/4006C10G2300/307C10L1/04Y02W30/62
Inventor 沙姆斯·巴哈尔·民·莫汉德·诺尔
Owner SYNGAS
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