Method and device for treating a contaminated alkaline amino acid saline solution

Patent metadata

Field	Value
Publication number	US-9327241-B2
Application number	US-201113808113-A
Country	US
Kind code	B2
Filing date	Jun 8, 2011
Priority date	Jul 22, 2010
Publication date	May 3, 2016
Grant date	May 3, 2016

Abstract

A method for treating a contaminated alkaline amino acid salt solution is provided. First, carbon dioxide is introduced into the amino acid salt solution, with the result that carbonate or carbonate salts is or are precipitated, these being filtered off. The remaining filtrate is then cooled, amino acid or amino acid salts being crystallized out and likewise being filtered off. The amino acid or amino acid salt is then dissolved again, with the result that a treated amino acid salt solution is recovered.

First claim

The invention clamed is:

1. A method for treating a contaminated alkaline amino acid salt solution, comprising the steps of:
introducing carbon dioxide into the amino acid salt solution and consequent precipitation of carbonate and/or carbonate salts,
filtering off of the precipitated carbonate and/or carbonate salts,
cooling the filtrate and consequent crystallizing out of the amino acid and/or amino acid salt,
filtering off of the crystallized amino acid and/or amino acid salt,
dissolving the filtered-off amino acid and/or amino acid salt and consequently recovering a treated amino acid salt solution; and
dissolving the precipitated carbonate and/or carbonate salts in the treated amino acid salt solution.

2. The method as claimed in claim 1 , further comprising, before the introducing of carbon dioxide into the amino acid salt solution, introducing vapor at a temperature of from 100° to 150° C. into the amino acid salt solution such that a condensate is formed.

3. The method as claimed in claim 2 , further comprising using the condensate for dissolving the filtered-off amino acid and/or amino acid salt.

4. The method as claimed in claim 1 , wherein the introduced carbon dioxide is taken from a desorption process for carbon dioxide.

5. The method as claimed in claim 1 , further comprising delivering the treated amino acid salt solution to a desorption process for carbon dioxide, wherein carbon dioxide contained in the treated amino acid salt solution is desorbed in the desorption process.

6. The method as claimed in claim 4 , wherein the desorption process is integrated into a fossil-fired power station process.

Assignees

• Giling Erwin Johannes Martinus
• Goetheer Earl Lawrence Vincent
• Joh Ralph
• Schneider Rüdiger
• Van Der Meer Johannes
• Verdoes Dirk
• Siemens Ag

Inventors

• Giling Erwin Johannes Martinus
• Goetheer Earl Lawrence Vincent
• Joh Ralph
• Schneider Rüdiger
• Van Der Meer Johannes
• Verdoes Dirk

Classifications

• B01D53/62 Primary

  Carbon oxides · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B01D53/96 Primary

  Regeneration, reactivation or recycling of reactants · CPC title

• B01D2252/20494

  Amino acids, their salts or derivatives · CPC title

• B01D53/14

  by absorption · CPC title