发明名称 |
METHOD OF INHIBITING REVERSION OF DEGREE OF WHITENESS IN LIGNIN- CONTAINING MATERIALS; METHOD OF REDUCING REVERSION OF DEGREE OF WHITENESS OF BLEACHED CELLULOSES (VERSIONS); LIGNIN- CONTAINING ARTICLE RESISTANCE TO REVERSION OF DEGREE OF WHITENESS; PAPER, CELLULOSE, PAPER SHEET (VERSION); AND COMPOSITION FOR INHIBITING REVERSION OF DEGREE OF WHITENESS |
摘要 |
FIELD: pulp-and-paper industry. SUBSTANCE: all items of invention are designed for inhibiting reversion of degree of whiteness. Methods of invention provide for treatment of lignin materials (paper with pH 5.5-7.5 and lignin) with 2,5-dihydroxydioxane. In particular, treatment is effected for news-paper sheet. Lignin-cellulose product and paper based on lignin-cellulose material contain 2,5-dihydroxydioxane in amounts large enough to inhibit light reversion. Paper sheet contains cellulose treated with 2,5-dihydroxydioxane. Composition for inhibiting reversion of degree of whiteness includes aqueous mixture of calcium carbonate and 2,5-dihydroxydioxane. EFFECT: inhibited reversion of degree of whiteness. 29 cl, 4 tbl, 4 ex
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申请公布号 |
RU2121026(C1) |
申请公布日期 |
1998.10.27 |
申请号 |
RU19960107788 |
申请日期 |
1994.08.24 |
申请人 |
DZE RISERCH FAUNDEJSHN OF STEJT JUNIVERSITI OF N'J;MINERALZ TEKNOLODZHIZ INK.;MINERALZ TEKNOLODZHIZ INK |
发明人 |
RAJMOND K.FREHNSIS;DANIEL' B.EHVANS |
分类号 |
D21H19/10;D21C9/00;D21C9/10;D21H11/00;D21H17/00;D21H17/03;D21H17/05;D21H17/66;D21H23/04;D21H23/30;(IPC1-7):D21C9/00 |
主分类号 |
D21H19/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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