C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
C01B 17/90 (2006.01) C01B 17/58 (2006.01) C01B 17/74 (2006.01) C07C 319/20 (2006.01) C07C 319/28 (2006.01) C07C 323/52 (2006.01) C07C 323/60 (2006.01)
Patent
CA 2255483
The invention relates to a method for recovering sulfuric acid from sulfurous by-products which arise in processes for preparing 2-hydroxy-4-methylthiobutyric acid (MRA), wherein the sulfuric acid accumulates in a grade in which it can be directly reused in such processes. For this purpose the combustion gas containing SO2 is passed through a sulfuric H2O2 solution in which the SO2 is oxidised to form sulfuric acid.
Hafner Volker
Hasseberg Hans Albrecht
Hasselbach Hans Joachim
Heinzel Harald
Huthmacher Klaus
Aktiengesellschaft Degussa
Degussa Ag
Marks & Clerk
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