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Dołączył: 29 Paź 2010
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 Wysłany: Nie 7:55, 12 Gru 2010 Temat postu: mbt schuhe test Bleaching technology research and |
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Bleaching technology research and development (three times) - Overview of the twenty foreign patent Paper
The oxidation of functional groups from a higher level into the lower oxidation level. The benefits of this shift include improved whiteness and improved brightener stability and performance. The appropriate reducing agent include: sulfite,[link widoczny dla zalogowanych], bisulfite, metabisulfite salts (Gioia sulfate), sub-sulfate, sodium thiosulfate, dithionite, and even more sulfate,[link widoczny dla zalogowanych], a of the sub- acid and its salts and derivatives, sulfur imide and sub-acid ethers, and the second CS Sulphur ether sulfonic acid, sulfur CS, phosphine, Lou salt,[link widoczny dla zalogowanych], phosphate and thiosulfate Asia Asia phosphate. Suitable chelating agents include compounds capable of chelating the formation of hair color and the cytosol fraction of transition metal compounds, and in the bleached pulp or paper products in the catalytic reforming reaction color. They include organic phosphorus, phosphate, carboxylic acid, dithio carbamate, any of the above components and any combination of salts. Brighteners are fluorescent dyes or pigments, are more able to absorb ultraviolet and visible spectrum at higher frequencies (blue) can be re-issued in the radiation, the resulting white effect. A typical optical gain from agents, including, but not limited to: pyrrole; biphenyls; coumarins; furan; ionic brighteners categories, including anionic, cationic, and neutral compounds; naphthoyl amine; coke nitrogen vinyl; replaced (eg, sulfonation) stilbene: and the salts of these compounds, such as alkali metal salts, alkaline earth metal salts, transition metal salts, organic salts and ammonium salt; and more than one combination of these agents. Typical formulations shown in Table 6. 2007 2 \Note TrialData: R457Brightness, E313Whiteness,[link widoczny dla zalogowanych], DE (AE) = Sq. rt. fIL) a desert _a) 2 + (bb) 2】 4.1 factory factory pilot plant test results 4.1.1 Test of a kraft pulp mill in the southern carried out. The results are shown in Table 7. In several trials, the combination of A and the OBA as the sizing with the application of the liquid in the sizing press. At 5 pounds / t and higher dosage, with the sheet of color improvement (see decreasing DE value) can always be increased by 1.5 points whiteness. In response to a standard factory conditions (do not add penetrant combinations), the brightness level down to the bottom (this set of experiment was repeated three times.) 4.1.2 the impact of reducing agent reducing agent. Using 30% sodium metabisulfite solution and brightener combination. Adding sulphate pulp and CTMP mixed in the headbox. Test results in Table 8. It can be seen from Table 8 reductant improved whiteness. In the presence of OBA, the brightness can be further improved. Table 8 by adding a reducing agent in the headbox combination of test results 4.1.3 chelating agents of a reducing agent reducing agent combinations of chelating agents shown in Table 9. Comparability between different combinations (all valid). These 2, 2007 with \Kxaft2.10% consistencypulp. 6hat70 ℃ Table 1O formula fluorescence effect SampleF1uorcsc. IntensityControlO. 1% CompositionAO. 2% CompositionAO. 2% OBAO. 2% CompositionA +0.7% OBA87140l06217108942Il7513120837 paper on the long side to improve the whiteness of thermal aging stability. You can also use these recipes the amount of reduction in optical brighteners, the effects of their fluorescence is shown in Table 10. Kraft Paper in the wet application of the results in Table 11. Table 11 Kraft Paper in the application of the results 5 Conclusion wet for (III). Research in this topic. Mei Han obtained the help of Zhejiang Library, in this, I would like to thank! Reference】 【l leaf light, ... ..., Zhejiang paper 2Oo630 (1) :38-43 【2】 Yu,[link widoczny dla zalogowanych], Leung, ... ..., Zhejiang Paper 200 630 (2) :39-44 【3】 Caiming De, ... ..., Zhejiang Paper 200 630 (2) :45-50 【4】 Caiming De. ... .... Zhejiang Paper 200 630 (3) :24-29 【5】 Lvqing Chen. ... ..., Zhejiang Paper 200630 (3): 3o-38 『6】 Snekkenes, ... ..., US2006/0090865May4, 2006『 7】 7Ohi, ... ..., EP168853509082006 『81O'learyPJ ... a, CA253703308092006 【9】 DuggiralaP ... a , WO2006111075119Oct. 2006.47 *
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