Patent search ap:("BASF AG") AND inv:"TREIBER GERT DIPL CHEM DR" Page 1

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发明专利
Dust-free non-foaming stabilised dithionite prepn. - by mixing with low mol. wt. polypropylene oxide and opt. re-using compacted grained material 未知

公开(公告)号：DE2915792A1

公开(公告)日：1980-10-30

申请号：DE2915792

申请日：1979-04-19

Applicant: BASF AG

Inventor： LUKAS SIEGMAR DIPL CHEM DR , TREIBER GERT DIPL CHEM DR , SCHREINER SIEGFRIED DIPL CHEM , VOELKL ERFRIED DIPL CHEM DR , APPL MAX DIPL CHEM DR

IPC: C01B17/66

Abstract: Dust-free dithionites, esp. Na2S2O4, are prepd. by mixing the dithionites with 0.1-3 (esp. 0.2-0.7) wt.% polypropylene oxides having mol. wt. 50-1200. Dithionites are used as bleaching agents in textiles-, pulp- and paper industry and as reducing agents for vat dyes. Dithionites are stabilised against decompsn. by moisture and air-O2 and can be compacted by pressing. Dust-formation and handling is prevented. The prods. dissolve in water and do not foam when dissolved in dye-baths with stirring.

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