Thanks, sir for the new concept !!. It would be better for us to see the bleached pulp turn into paper and is it possible to add cellulose cotton in the paper-making process? Great video as always
Yes, a temperature of between 60 and 90 degrees celsius is helpful in peroxide bleaching. Sodium percarbonate provides a certain amount of peroxide in solution (not aware of the percentage). Below is some information gleaned from a video by Richard Venditti on bleaching chemicals (ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-jDvC2karRvA.html). It starts at 19:10. o Peroxide is the most important bleaching agent for mechanically recovered paper pulps. o Peroxide bleaches in a non-delignifying manner by destroying the chromophore. o We don’t lose much yield when we use peroxide. o NaOH is added to increase the perhydroxyl anion concentration, the active bleaching agent. There is an optimum amount of NaOH to add: (1) Too little and not enough activation, (2) too much and the alkali yellows the pulp. How to successfully utilize peroxide. 1. Application or peroxide: 1-3% on solids, typically less than 2%. Bleaching result improves with increased application. 2. Time: 30-90 minutes 3. Consistency: 10+%. Higher consistency so that the peroxide does not get diluted and the perhydroxyl is made more effective. 4. Temperature: 60-90 Celsius 5. pH: 9.0-11.5 (add NaOH) 6. Good mixing
Thank you very much. Just a follow-up question, what is the solution you added at the end of the video that successfully turned the pulp into white? Thank you very much.
Hello, I would like to follow your methods for our school research paper which is about turning fruit peels into paper. Can I ask if there are any books or articles where you based these methods? We just need it for citation of our paper.
You can make a bleach solution with a concentration between 1% and 3%; I usually use a 2% solution as my standard. That translates to 2.0 grams of bleaching powder per 100 mL of water. [2.0 g/100 mL) x 500 mL = 2.0 g x 5 = 10 g in 500 mL] To make 500 mL of a 2% solution: (1) weight 10.0 g of bleaching powder; (2) add it to a measuring container; (3) add enough water until it reaches the 500 mL mark. The Chlorine in tap water may slightly affect your outcomes and so softer water like rainwater or deionized water is preferred.
