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公开(公告)号：AU2010251173A1
公开(公告)日：2012-01-19
申请号：AU2010251173
申请日：2010-05-19
Applicant: BASF SE
Inventor： MRZENA FRANK , SCHOENHERR MICHAEL , HEINZ ROBERT , HEIDENFELDER THOMAS
Abstract: The invention relates to a method for producing a spray powder containing one or more glycine-N,N-diacetic acid derivatives of the general formula (I) MOOC-CHR-N(CHCOOM) (I), R standing for C alkyl and M standing for alkali metal, starting from an aqueous solution containing the one or more glycine-N,N-diacetic acid derivatives, which is spray-dried by adding air, characterized in that - the aqueous solution contains the one or more glycine-N,N-diacetic acid derivatives at a fraction of ≥ 84 wt.% relative to the total weight of the dry mass, and that - the spray drying occurs in a drying apparatus, to which the aqueous solution and the air are fed in parallel flow, with a temperature gradient between the aqueous solution and the air in the range of 70 to 350 °C, and that - in the drying apparatus, the aqueous solution is atomized into fine liquid droplets by being guided onto one or more disks, which rotate at a circumferential speed of ≥ 100 m/s, or by being compressed by means of a pump to a pressure of ≥ 20 bar absolute and introduced into the drying apparatus at this pressure by means of one or more nozzles.
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公开(公告)号：NO20082642L
公开(公告)日：2008-07-28
申请号：NO20082642
申请日：2008-06-05
Applicant: BASF SE
Inventor： HEINZ ROBERT , HAUK ALEXANDER , LOHMANN ANNA VALESKA , GROPP STEFAN
Abstract: Preparation of a solid sodium formate preparation comprises (i) preparing an aqueous solution, which exhibits formic acid, sodium formate and water; (ii) subjecting the aqueous solution to crystallization and separating a solid phase from mother liquor; (iii) supplying the mother liquor during the production of the aqueous solution, to a distilling device; (iv) mixing the mother liquor with a sodium-containing base to form a mixture containing sodium formate and formic acid; (v) mixing the mixture with formic acid; and (vi) removing the water by withdrawing from the distilling device. Preparation of a solid sodium formate preparation with a content of at least 35 wt.% of formic acid, comprises: (i) at increased temperature, preparing an aqueous solution, which exhibits a molar ratio of formic acid and sodium formate of more than 1.5:1 and a molar ratio of formic acid and water of at least 1.1:1; (ii) subjecting the aqueous solution to crystallization and separating a solid phase from mother liquor; (iii) supplying the mother liquor, optionally after removal of a partial quantity of the mother liquor, during the production of the aqueous solution, to a distilling device; (iv) mixing the mother liquor with a sodium-containing base to form a mixture containing sodium formate and formic acid; (v) mixing the mixture with formic acid under receipt of the aqueous solution; and (vi) removing the water that is not needed for the production of the aqueous solution, by withdrawing from the distilling device.
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