Process for the processing of salvaged or waste plastic materials
First Claim
1. A process for extracting chemical starting materials and liquid fuel components from a salvaged or waste plastic material, comprising the steps of:
- depolymerizing a salvaged or waste plastic material to produce a pumpable liquid phase and a volatile phase without the additions of hydrogen;
separating said liquid phase from said volatile phase;
further separating said volatile phase into a gaseous phase and a condensate;
subjecting said pumpable liquid phase to liquid phase hydrogenation, gassification, low-temperature carbonization or a combination thereof, and subjecting said gaseous phase to a scrubbing step to remove acid components, then subjecting the scrubbed effluent to a liquid phase hydrogenation.
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Abstract
A process is disclosed for processing used or waste plastic materials in order to recover chemical raw materials and liquid fuel components by depolymerisation of the used materials, which are transformed into a pumpable and into a volatile phase. The volatile phase is separated into a gaseous phase and a condensate or condensable depolymerisation product, which are refined by standard usual procedures. The pumpable phase remaining once the volatile phase is separated is subjected to liquid phase hydrogenation, gasification, low temperature carbonisation or to a combination of said processes.
82 Citations
17 Claims
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1. A process for extracting chemical starting materials and liquid fuel components from a salvaged or waste plastic material, comprising the steps of:
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depolymerizing a salvaged or waste plastic material to produce a pumpable liquid phase and a volatile phase without the additions of hydrogen;
separating said liquid phase from said volatile phase;further separating said volatile phase into a gaseous phase and a condensate;
subjecting said pumpable liquid phase to liquid phase hydrogenation, gassification, low-temperature carbonization or a combination thereof, and subjecting said gaseous phase to a scrubbing step to remove acid components, then subjecting the scrubbed effluent to a liquid phase hydrogenation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification