Method for preparing VBL fluorescent brightening agent using nano filter membrane

The invention discloses a method for using filter membrane to produce VBL fluorescent brightening agent. It uses filter membrane whose catch molecular weight is 100-2000 MWCO to filter VBL fluorescent brightening agent synthesizing pulp, desalting, impurities eliminating and condensing. The process...

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Bibliographic Details
Main Author LINYU,YAN JIANG
Format Patent
LanguageEnglish
Published 09.05.2007
Subjects
ADHESIVES
CHEMISTRY
DYES
LAKES
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
MORDANTS
NATURAL RESINS
ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES
PAINTS
POLISHES
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Summary:The invention discloses a method for using filter membrane to produce VBL fluorescent brightening agent. It uses filter membrane whose catch molecular weight is 100-2000 MWCO to filter VBL fluorescent brightening agent synthesizing pulp, desalting, impurities eliminating and condensing. The process of the invention is simple, it reduces the discharge of waste water and the processing difficulty, the side product is low, the product is stable, and the dissolvability and the colour intensity are upgraded.
Bibliography:Application Number: CN20031006991