Stabilized carbonic acid adducts

The stabilized carbonic acid adduct (SCAA2), comprising carbonic acid, at least one amine (AM) and, optionally, at least one salt (S),

• producible according to a method comprising the steps of:
• a) providing a solution (A) comprising at least one solvent and CO2 dissolved in the at least one solvent,
• optionally, b) dissolving a base (BA) other than the amine (AM) in the solution (A) to yield the solution (A1),
• c) dissolving the at least one amine (AM) in the solution (A) or (A1) to yield the solution (B),
• g2) adding polyvinylpyrrolidone to the solution (B) yielded in step c) to yield the stabilized carbonic acid adduct (SCAA2).
• wherein the content of CO2 in the solution (B) which is subjected to step c) is at least 10 g/l, preferably at least 12 g/l, more preferably at least 14 g/l, and most preferably at least 14 to 16 g/l, and the amine (AM) can also be employed in the form of a salt.

The stabilized carbonic acid adduct (SCAA3) comprising carbonic acid, at least one amine (AM) and, optionally, at least one salt (S),

• producible according to a method comprising the steps of:
• a) providing a solution (A) comprising at least one solvent and CO2 dissolved in the at least one solvent,
• optionally, b) dissolving a base (BA) other than the amine (AM) in the solution (A) to yield the solution (A1),
• c) dissolving the at least one amine (AM) in the solution (A) or (A1) to yield the solution (B),
• g3) adding polyvinylpyrrolidone to the solution (B) yielded in step c) to yield solution (C),
• h) freezing the solution yielded after completion of step g3),
• j) storing the solution frozen in step h) at −100 to 0° C. for no longer than 4 days, wherein the CO2 content in the solution subjected to step h) is at least 7 g/l, preferably at least 7.5 g/l, and the amine (AM) can also be employed in the form of a salt,
• wherein the steps are carried out in the order listed above:
• a), optionally b), c), g3), h) and j).

The stabilized carbonic acid adduct (SCAA4) comprising carbonic acid, at least one amine (AM) and, optionally, at least one salt (S),

• producible according to a method comprising the steps of:
• a) providing a solution (A) comprising at least one solvent and CO2 dissolved in the at least one solvent,
• optionally, b) dissolving a base (BA) other than the amine (AM) in the solution (A) to yield the solution (A1),
• c) dissolving the at least one amine (AM) in the solution (A) or (A1) to yield the solution (B),
• d) freezing the solution yielded after completion of step c),
• e) storing the solution frozen in step d) at −100 to 0° C. for no longer than 4 days,
• f) drying the solution stored in step e) to yield carbonic acid adduct (CAA),
• k) drying a solution saturated with CO2 comprising the carbonic acid adduct (CAA) from step f) and polyvinylpyrrolidone,
• wherein the CO2 content in the solution subjected to step d) is at least 6 g/l, preferably at least 7 g/l, more preferably at least 8 g/l, particularly preferably 8.1 g/l to 9.5 g/l and the amine (AM) can also be employed in the form of a salt.