I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com)…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUS
Focus on Pumps
Self-priming, liquid-ring pumps enable hygienic operation The CFS AS/ASH Series…
NEW PRODUCTS + Show More

Comment

Recycling textiles into reusable cotton, polyesters and silver

By Scott Jenkins |

Millions of tons of cotton-polyester-blend material that would normally be discarded in landfills could be recycled using a newly patented method for removing dyes from textiles, separating cotton from fabric blends, and depolymerizing polyesters. The process, developed and demonstrated by BCD Group Inc. (Cincinnati, Ohio; Email: tomopp40@yahoo.com), represents a departure from current fabric-recycling approaches, which often require high-temperatures, lengthy processing times and costly solvents. BCD’s process occurs at 90–120°C in 10–20 min. and employs low-cost, reusable reagents in a way that retains the strength of the cotton fibers (photo). The easy-to-operate process also uses non-toxic chemicals that can be reused. Conventional depolymerization methods cannot be used for separating cotton-polyester blends because the high temperatures and long process times destroy cotton fibers. In the BCD process, fabric blends of cotton and polyethylene terephthalate (PET) are shredded, then treated in a common stirred-tank reactor, with base and a proprietary phase-transfer catalyst (PTC). The PTC cleaves the bonds of dyes, polyesters and other chemicals bonded to cotton. The solid cotton fiber is removed from the reactor after…
Related Content

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Quadruple Sensor Lifetime with a Retractable Housing
Minimizing Explosion Risk Where Other Solutions Cannot
Minimizing Corrosion with Fast, Robust Gas Analysis
Lower Measurement Point Costs with Automatic pH Sensor Cleaning
Reduce the Risk of Corrosion in Fertilizer Production

View More

Live chat by BoldChat