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US 2010/0189623 A1Published application
Method for the recovery of mineral acids from saline solutions
AssigneeBASF SE
InventorsVeronika Wloka, Torsten Mattke, Carsten Knoesche, Daniel Breuninger, Nils Bottke
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Abstract
The invention relates to a process for recovering acids from product streams of organic syntheses, which comprises the steps a) neutralization of the acid with a base, b) removal of the base by means of adsorption, c) recovery of the acid.
Claims16
A process for recovering acids from product streams of organic syntheses, which comprises the steps
- a) neutralization of the acid with a base,
- b) removal of the base by means of adsorption,
- c) recovery of the acid.
A process for preparing diphenylmethanediamine, which comprises the steps:
- A) reaction of aniline with formaldehyde in the presence of a mineral acid,
- B) neutralization of the mineral acid with a base,
- C) separation of the organic phase and the inorganic phase,
- D) removal of the base from the inorganic phase by means of adsorption,
- E) recovery of the mineral acid.
2 more elements
Dependencies are inferred from the claim text.