Sentence examples for process sulfite from inspiring English sources
See also kraft process; sulfite process.
Sulfite process, sulfite also spelled Sulphite, chemical process for the manufacture of paper pulp that employs an acid bisulfite solution to soften the wood material by removing the lignin from the cellulose.
The effect of the main process parameters, sulfite agent dosage and reaction duration, on cellulose yield was investigated.
It is shown that the rate of the anodic process in sulfite solutions is limited by diffusion of discharging particles, while the rate of the anodic process in thiosulfate solutions is limited by slow (in comparison with diffusion) heterogeneous reactions.
The results show that both economically and environmentally process with sulfites and soda from rice husk presents the best results; however the quality of lignin obtained with sulfites is not suitable for high value-added products.
The proteolysis treatment and the conventional process using sulfites both allow the starch to be isolated by disrupting the starch-gluten interactions; however, the specific chemical mechanism of the two pretreatments is not identical and there can be some additive benefits of using them together [ 6].
This process utilizes neutral sulfite pretreatment which under optimal conditions (160 °C and 3% (w/v) sulfite charge) provides 64.3% delignification while retaining 90% of cellulose and 67.3% of xylan.
Paper was once made with reconstituted rags but, in the late nineteenth century, the sulfite process for breaking wood fibers down into paper pulp was invented (with its characteristic rotten-egg smell) and the modern paper-making era began.
Black liquors from Kraft pulping of spruce (Choka Company. Anzali/Iran) and Sulfite process (Chokam Company, Mazandaran/Iran) were used as sources of sulfate and sulfite lignins, respectively.
The first commercial sulfite process for sulfite pulp production was built in 1874 in Bergvik, Sweden [ 5].
