WebBleached Chemi-ThermoMechanical Pulp. Bleached Chemi-ThermoMechanical Pulp (BCTMP) is a pulp product used by the paper industry as a less-expensive alternative for Northern Bleached Softwood Kraft (NBSK). BCTMP was first produced by Millar Western in 1988 in its Whitecourt Mill, and was initially used in lower grade paper applications. [1] WebFeb 6, 2024 · The pulp and paper industry is resource and capital-intensive industry that contributes to a number of environmental issues, such as acidification, nutrification, acidification of the atmosphere, global warming, human and eco-toxicity and solid waste (Bajpai and Bajpai 1996; Patrick 1997).The pulping and bleaching processes have the …
Papermaking - Bleaching and washing Britannica
WebHYDROSULFITE BLEACHING CONDITIONS Bleaching chemicals % wt. on pulp sodium hydrosulfite (Na 2 S 2 O 4) 0.2 – 1.2% Consistency (Cs.) and pH 4 – 10% Cs. and pH 5 … WebThe bleaching agents and the sequence in which they are used depend on a number of factors, such as the relative cost of the bleaching chemicals, type and condition of the pulp, desired brightness of the paper to be produced, and sometimes in response to environmental guidelines and regulations. Bleaching of mechanical pulp is much different eiki sound 16mm projector
Pulping & Bleaching - Pulp and Paper Canada
WebPulp bleaching is conventionally achieved by treatment of unbleached pulp with chlorine based chemicals. However, chlorinated organic compounds formed in the reaction of … Web1 day ago · Wheat Straw Pulp are made with a wheat byproductâ the stalk, having a good environmental effect.Wheat Straw Pulp market size is estimated to be worth USD 716.4 million in 2024 and is forecast to ... WebChemical methods cook and bleach the pulp to chemically remove (dissolve) the lignin, leaving a much purer, whiter, and more stable pulp. Chemical pulps are more expensive … eiki theater projector