Method to separate and recover oil and plastic from plastic contaminated with oil
AssigneeHoneywell Federal Manufacturing & Technology, LLC
InventorsGeorge Bohnert, Thomas Hand, Gary DeLaurentiis
Life of this patent
Estimating the term…
Abstract
A method for removing contaminants from synthetic resin material containers using a first organic solvent system and a second carbon dioxide system. The organic solvent is utilized for removing the contaminants from the synthetic resin material and the carbon dioxide is used to separate any residual organic solvent from the synthetic resin material.
Claims43
A method for removing contaminants from synthetic resin material comprising contacting particulate synthetic resin material containing at least one contaminant with an organic solvent comprising at least one carbon atom and at least one hydrogen atom and having a specific gravity of between about 0.9-1.5.
(canceled)
A method for removing contaminants from synthetic resin material comprising contacting particulate synthetic resin material containing at least one contaminant with an alkyl ester solvent having the general formula RCOOR′, wherein R and R′ are independently selected from C1-C10 alkyl groups and R contains at least one hydroxyl group.
A method for removing contaminants from synthetic resin material comprising the steps of:
- (a) contacting particulate synthetic resin material containing at least one contaminant with a solvent other than carbon dioxide;
- (b) removing at least a portion of said solvent from said particulate synthetic resin material;
- and
- (c) contacting said particulate synthetic resin material with liquid or supercritical carbon dioxide for removal of at least a portion of said solvent not removed in step (b).
A system for removing contaminants from synthetic resin material comprising:
- (a) at least one solvent vessel including therein a quantity of a liquid solvent other than carbon dioxide for contacting with said synthetic resin material;
- (b) at least one separation device for removing at least a portion of said solvent from said synthetic resin material;
- and
- (c) at least one carbon dioxide vessel including therein a quantity of liquid or supercritical carbon dioxide for contacting said synthetic resin material and removing at least a portion of said solvent remaining on said synthetic resin material.
(canceled)
A method for removing contaminants from synthetic resin material comprising:
- (a) contacting particulate synthetic resin material containing at least one contaminant with an organic solvent comprising at least one carbon atom and at least one hydrogen atom and having a specific gravity of at least about 0.76;
- and
- (b) removing at least a portion of said solvent from said particulate synthetic resin material bypassing said synthetic resin material through a hydrocyclone followed by a dryer.
A method for removing contaminants from synthetic resin material comprising contacting particulate synthetic resin material containing at least one contaminant with an organic solvent comprising at least one carbon atom and at least one hydrogen atom and having a specific gravity of at least about 0.76, wherein said particulate synthetic resin material comprises particles of a higher specific gravity material and particles of a lower specific gravity material, and said contacting step including separating at least a portion of said lower specific gravity material from at least a portion of said higher specific gravity material by flotation of said portion of said lower specific gravity material in said solvent.
A method for removing contaminants from synthetic resin material comprising contacting particulate synthetic resin material containing at least one contaminant with an organic solvent comprising at least one carbon atom and at least one hydrogen atom and having a specific gravity of at least about 0.76, said contaminant being selected from the group consisting of oil, pesticides, milk, detergents, and combinations thereof.
Dependencies are inferred from the claim text.