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Environmentally Friendly Cellulose Waste Recycling

A cellulose and recycling technology, applied in the field of environmentally friendly cellulose waste recycling, can solve problems such as waste recycling and achieve the effect of reducing landfill space

Active Publication Date: 2021-11-23
WASHINGTON STATE UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, post-consumer waste is difficult to recycle using existing recycling technologies due to impurities remaining on the cotton product and / or tearing / abrasion during use

Method used

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  • Environmentally Friendly Cellulose Waste Recycling
  • Environmentally Friendly Cellulose Waste Recycling
  • Environmentally Friendly Cellulose Waste Recycling

Examples

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Embodiment Construction

[0022] Certain embodiments of systems, devices, articles of manufacture and processes for recycling cellulosic products are described below. In the following description, specific details of components are included to provide a thorough understanding of certain embodiments of the disclosed technology. Those skilled in the relevant art will also appreciate that the disclosed technology may have additional embodiments, or may be used without the following reference Figure 1-8 The described embodiments are practiced with several details.

[0023] As used herein, "cellulosic waste" generally refers to unwanted or unusable material comprising at least in part cellulose. An example cellulosic waste may be "cotton waste" that includes unwanted or unusable material comprising at least in part cotton. For example, cotton waste may include textiles, clothing, or other types of consumer products that contain cotton that is discarded, worthless, defective, or useless after initial use....

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Abstract

Techniques for chemically recycling cellulosic waste such as cotton are disclosed herein. In one embodiment, the method comprises, hydrolyzing cotton waste and dissolving the cellulose in the hydrolyzed cotton waste in a solution containing alkali and selected from urea ((NH 2 ) 2 CO), polyethylene glycol, or thiourea (SC(NH 2 ) 2 ) in an aqueous solution of one or more of them to produce another aqueous solution containing dissolved cellulose. Another aqueous solution containing dissolved cellulose may then be extruded into a coagulation bath to coagulate the dissolved cellulose in the extruded solution, thereby reforming the dissolved cellulose from the cotton waste into regenerated fibers.

Description

[0001] Cross References to Related Applications [0002] This application is a formal application of, and claims priority to, U.S. Provisional Application No. 62 / 505,967, filed May 14, 2017, and U.S. Provisional Application No. 62 / 635,892, filed February 27, 2018, the disclosure of which is It is incorporated herein in its entirety. [0003] Statement Regarding Federally Funded Research [0004] This work was performed with government support under grant number SU83678701 awarded by the Environmental Protection Agency. The government has certain rights in this invention. Background technique [0005] Cotton is a material widely used in consumer products such as clothing and textiles. Consumption of such cotton products has been steadily increasing over the past few decades. With such increased consumption, cotton waste generation also increases. Cotton waste can be classified as pre-consumer waste or post-consumer waste. Pre-consumer waste occurs during the production of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B1/08C08B16/00C08B9/00
CPCC08B15/02C08B16/00
Inventor 刘航张锦文刘望成
Owner WASHINGTON STATE UNIVERSITY
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