Maro Publications

Recycling

Patent Abstracts

From 03/26/2014 to 4/25/2012   

Maro Topics

Recycling: Patent Titles

Recycling: Notes

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Patents with Abstracts

8. 8,388,873 
Method for recycling all waste plastics in particular mixed plastics 

Hofmann and Gercke of CVP Clean Value Plastics GmbH, Germany, developed method for the recycling mixtures of waste plastic by grinding flakes or other plastic parts in at least one refiner stage in the presence of water in several stages. (RDC 3/19/2013)

7. 8,361,358 
Method of recycling fiberglass reinforced plastics 

Wolf of Astoria Industries of Iowa, Inc, Iowa, recycled fiberglass materials by grinding the waste plastics and mixing with the fresh polyester resin, titanium dioxide pigment, thermoplastic micro spheres, and a catalyst that only initiates cure when heat activated such as Benzoyl Peroxide (BPO).  (RDC 1/30/2013)

6. 8,193,403 
Systems and methods for recycling plastic
 
DeWhitt of Agilyx Corporation, Oregon, converted waste plastics into purified crude oil free of acids and metals.  The plastic is heated under vacuum to depolymerize the plastic yielding a vapor which is contacted with a pH adjusted solution in a continuous system. (RDC 6/29/2012)

5. 8,177,152 
Asphalt shingle recycling system
 
Harmon of GRDL, Florida, recycles asphalt shingles by heating to form a hot solid and/or a liquefied slurry.  The hot solid and/or the liquefied slurry is then removed from the treatment chamber. The asphalt roofing material in the treatment chamber can be agitated to promote mixing.  The asphalt is heated to a temperature in the range from 200 degrees Fahrenheit to 650 degrees Fahrenheit within the treatment chamber.  The solid and/or liquefied slurry is milled after it has been removed from the treatment chamber.  The solid and/or the liquefied slurry is cooled after it exits the treatment chamber, preferably to a temperature in the range of approximately 90 degrees Fahrenheit to 110 degrees Fahrenheit.  The hot solid and/or the liquefied slurry is passed through a hammer mill after the hot solid and/or the liquefied slurry exits the treatment chamber to reduce the particle size of the solid particles. (RDC 5/22/2012)

4. 8,177,151 
Separation of materials comprising super absorbent polymers using reduced water
 
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Grimes of Knowaste International, Great Britain, separataed components of sanitary paper products containing a super absorbent polymer into a super absorbent polymer, fibers and a plastic by shredding the material, adding salt such as aluminum sulfate to the material, and agitating the material with steam in an autoclave. (RDC 5/22/2012)

3. 8,138,233 
Process for making polybutylene terephthalate (PBT) from polyethylene terephthalate (PET)
 
Agarwal et al of Sabic Innovative Plastics, Netherlands, developed a two step process in which a 1,4-butane diol component reacts with a polyethylene terephthalate component under conditions that depolymerize the polyethylene terephthalate component into a molten mixture and the molten mixture is placed under subatmospheric conditions that produce the modified polybutylene terephthalate random copolymers.  They also developed a three step process in which a diol component selected from the group consisting of ethylene glycol, propylene glycol, and combinations thereof reacts with a polyethylene terephthalate component under conditions sufficient to depolymerize the polyethylene terephthalate component into a first molten mixture; and where the first molten mixture is combined with 1,4-butane diol under conditions that create a second molten mixture that is subsequently placed under subatmospheric conditions that produce the modified polybutylene terephthalate random copolymers. (RDC 5/15/2012)

2. 8,138,232 
Method for recycling plastic materials and use thereof
 
Maeurer, Schlummer and Beck of Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung, Germany, recycled plastics which contain at least two polymers, copolymers or blends thereof based on polystyrene.  The plastic material is thereby mixed with a solvent for the polymers, copolymers or blends.  Subsequently a precipitation is effected by addition of a corresponding precipitant so that then the gelatinous precipitation product can be separated from the further components of the plastic material. The method is used for recycling of any plastic materials, in particular of plastic materials from electronic scrap processing and from shredder light fractions.  (RDC 5/15/2012)

1. 8,133,354 
Acoustic ceiling tiles made with paper processing waste
 
Baig of USG Interiors, Illinois, produced making acoustic tiles form paper processing wastes. Perlite; inorganic material selected from the group consisting of calcium sulfate, calcium carbonate, and clay; a binder selected from the group consisting of starch, a combination of starch and cellulosic fibers, latex, kraft paper gel and mixtures thereof; optionally mineral wool; optionally gypsum; and cellulosic fiber, wherein at least a portion of the cellulosic fiber are from pulp and paper processing waste. An aqueous slurry is placed onto a moving foraminous wire to form a cake. The cake  is dewatered to form a base mat and dried to produce a base mat.  (RDC 4/25/2012).

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Roger D. Corneliussen
Editor
www.maropolymeronline.com

Maro Polymer Links
Tel: 610 363 9920
Fax: 610 363 9921
E-Mail: cornelrd@bee.net  

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Copyright 2012 by Roger D. Corneliussen.
No part of this transmission is to be duplicated in any manner or forwarded by electronic mail without the express written permission of Roger D. Corneliussen
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** Date of latest addition; date of first entry is 4/25/2012.