公开(公告)号：ZA200808279B

公开(公告)日：2009-12-30

申请号：ZA200808279

申请日：2008-09-29

Applicant: BASF SE

Inventor： SEELMANN-EGGEBERT HANS-PETER ,  WITTELER HELMUT ,  HEIDEN-FELDER THOMAS ,  LAUBUSCH BERND

IPC: C22B20100101

Abstract: Aqueous leachant compositions and processes for using the same comprising: (a) providing a metal-containing compound; and (b) subjecting the metal-containing compound to an acid digestion comprising contacting the metal-containing compound with an aqueous leachant; wherein the aqueous leachant comprises a mixture selected from the group consisting of: (i) sulfuric acid and one or more alkanesulfonic acids having alkane moieties selected from the group consisting of propyl, ethyl and methyl groups, at a weight ratio of alkanesulfonic acid to sulfuric acid of 1:1000 to 1:1; (ii) sulfuric acid and one or more salts of alkanesulfonic acids having alkane moieties selected from the group consisting of propyl, ethyl and methyl groups, at a weight ratio of salt of alkanesulfonic acid to sulfuric acid of 1:9 to 1:99.

公开(公告)号：ZA201109262B

公开(公告)日：2013-02-27

申请号：ZA201109262

申请日：2011-12-15

Applicant: BASF SE

Inventor： MRZENA FRANK ,  SCHONHERR MICHAEL ,  HEINZ ROBERT ,  HEIDEN-FELDER THOMAS

IPC: B01J20060101 ,  C07C20060101 ,  C11D20060101

Abstract: A process for the preparation of a spray-dried powder containing at least one glycine-N,N-diacetic acid compound of a formula MOOC—CHR—N(CH2COOM)2, where R is a C1-12-alkyl and M is an alkali metal, the process including: preparing an aqueous solution containing the glycine-N,N-diacetic acid compound; concurrently passing the aqueous solution and air into a spray-drying apparatus; atomizing the aqueous solution by feeding the aqueous solution onto a rotating disk or by compressing the aqueous solution with a pump to a pressure of ≧20 bar absolute, to obtain fine liquid droplets; and drying the droplets, to obtain the spray-dried powder, where a temperature gradient between the aqueous solution and the air is in a range from 70 to 350° C., and a content of the glycine-N,N-diacetic acid compound in the aqueous solution is ≧84% by weight, based on a total weight of the dry mass.