4.
    发明专利
    未知

    公开(公告)号:ES2160992T3

    公开(公告)日:2001-11-16

    申请号:ES98104396

    申请日:1998-03-11

    Applicant: BASF AG

    Abstract: Production of crystalline NaOH . 3.5H2O, involves crystallising NaOH.3.5H2O from an aqueous NaOH solution oversaturated with NaOH . 3.5H2O, and removing the crystals using a mechanical solid/liquid separator. The solid/liquid separation occurs under conditions in which crystalline NaOH.3.5H2O can be liberated from the lye residues; the NaCl content of the crystalline NaOH . 3.5H2O being ≤ 100 mg per kg.

Patent Agency Ranking