Novel Chemical Process for Bleaching De-inked PulpEPA Contract Number: 68D10045
Title: Novel Chemical Process for Bleaching De-inked Pulp
Investigators: Ballantyne, Wayne E.
Small Business: Guild Associates Inc.
EPA Contact: Manager, SBIR Program
Project Period: September 1, 1991 through March 1, 1992
Project Amount: $49,712
RFA: Small Business Innovation Research (SBIR) - Phase I (1991) RFA Text | Recipients Lists
Research Category: SBIR - Pollution Prevention , Pollution Prevention/Sustainable Development , Small Business Innovation Research (SBIR)
Description:The proposal responds to the increasing pressure to re- cycle paper. Since nonbleached papaer uses almost 100% recycle pulp, additional recycling must come from bleach- ing recycled pulp to be suitable for newsprint and white paper. The objective of the experiments is to demonstrate the feasibility of bleaching recycled pulp with a unique chemical mixture. The experiments will use samples of commercial de-inked pulp nd a bench scale reactor to collect data on the increase in brightness with time and chemical concentration. Process calculations predict eco- nomic advantages of this process compared to conventional technology. The process should be applicable to existing de-inking plants as an added process step and applicable to new plant construction integrated with the plant design.
Current bleaching chemical cost for recycled pulp is around $20 per ton. The forecast chemical cost for this technology is $2 per ton. This represents annual savings of over S60 million on today's bleached recycled pulp. Since paper recycling is forecast to grow significantly, the savings will be much greater.