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Methods for converting plastic to wax

a technology of plastic and wax, applied in the field of plastic processing to convert plastic to wax, can solve the problem that the quality of polyethylene waxes derived from the thermal decomposition of polyethylene resin is typically inferior

Inactive Publication Date: 2015-09-03
HONEYWELL INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes methods for converting plastic to wax using heat and hydrogen. The methods result in the formation of paraffin and olefin compounds, which can be used to create various products. The technical effects of this patent include providing a way to recycle waste plastic and creating a new source of wax for various applications.

Problems solved by technology

However, polyethylene waxes derived from the thermal decomposition of polyethylene resin are typically inferior in quality, e.g., they exhibit undesirable color, low molecular weight, and are inconsistent across production lots.

Method used

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  • Methods for converting plastic to wax
  • Methods for converting plastic to wax

Examples

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Embodiment Construction

[0042]In a first example of an embodiment of a process for converting plastic to wax, 50 grams (g) of low density polyethylene (LDPE) was introduced to a stainless steel autoclave. The autoclave environment was purged with hydrogen at 40 standard cubic centimeters per minute (sccm) and the autoclave was heated to 135° C. for 60 minutes to melt the LDPE. Thereafter, the melted LDPE was heated to 405° C. for 30 minutes causing depolymerization of the LDPE under the continued hydrogen purge. The autoclave was then cooled to ambient temperature and the product wax was recovered. The composition of the product wax formed with hydrogen is set forth below in the TABLE.

[0043]In a second example of an embodiment of a process for converting plastic to wax, 50 or 20 grams (g) of low density polyethylene (LDPE) was introduced to a stainless steel autoclave. The autoclave environment was purged with nitrogen at 40 standard cubic centimeters per minute (sccm) and the autoclave was heated to 135° ...

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Abstract

Methods for converting plastic to wax are provided. In one embodiment, a method for converting a waste plastic to wax includes introducing the waste plastic into a chamber and adding hydrogen to the chamber. The method includes heating the waste plastic and hydrogen sufficiently to thermally depolymerize the waste plastic to form a wax product comprising paraffin and olefin compounds.

Description

TECHNICAL FIELD[0001]The technical field generally relates to methods for forming wax, and more particularly relates to methods for processing plastic to convert the plastic to wax.BACKGROUND[0002]Waxes are broadly divided into several well established groups including paraffin waxes (normally obtained from petroleum oil lubricating distillates), microcrystalline wax (usually obtained from residual lubricating oil fractions), and polyethylene waxes (typically manufactured from low molecular weight, high-density raw materials). Each of these wax types has been found to have specific physical properties making them especially attractive for particular utilities. For example, polyethylene waxes are often used in the formulation of colorants for plastics, in polyvinyl chloride lubricants, in adhesives, and in inks to decrease friction. Polyethylene waxes may further be used as release agents or as slip agents.[0003]Polyethylene wax compositions contain a variety of polyethylenes. For th...

Claims

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Application Information

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IPC IPC(8): C10G1/10
CPCC10G1/10C10G1/00C08J11/12C10G11/08
Inventor BARGER, PAUL T.RAJARAM, RAJ V.BANAVALI, RAJIV M.
Owner HONEYWELL INT INC
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