Process for converting cyclic urea to corresponding diamine in a

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Carbon dioxide or hydrogen sulfide component

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

423228, 423232, 423234, B01D 5334

Patent

active

042821940

ABSTRACT:
Acidic gases such as carbon dioxide are removed from a normally gaseous mixture including the acidic component by contacting the gaseous mixture in an absorption zone with an acid absorbing scrubbing solution comprising a basic alkali metal compound and an activator for the compound, during which process at least a portion of the activator is converted to a cyclic urea. The solution is then transferred to the desorption zone to remove at least a portion of the absorbed acidic component. At least a portion of the partially desorbed scrubbing solution containing the cyclic urea is transferred from the desorption zone to a thermal conversion zone maintained at an elevated temperature wherein at least a portion of the cyclic urea is converted back to the activator. A portion of the scrubbing solution from the thermal conversion zone, relatively rich in the acidic component is vaporized and returned to the desorption zone, and another portion, relatively lean in the acidic component, is returned from the thermal conversion zone to the absorption zone.

REFERENCES:
patent: 4094957 (1978-06-01), Sartori et al.
patent: 4100257 (1978-07-01), Sartori et al.
patent: 4101633 (1978-07-01), Sartori et al.
patent: 4112050 (1978-09-01), Sartori et al.
patent: 4112051 (1978-09-01), Sartori et al.
patent: 4112052 (1978-09-01), Sartori et al.
patent: 4138468 (1979-02-01), Kettner et al.
patent: 4180548 (1979-12-01), Say et al.
Hofman, "Imidazole and Its Derivatives, Part I," Interscience Publishers, New York, 1953, p. 228.
Mulvany et al., "Synthesis of Ethylene Urea (Imidazolidone-2)", Industrial & Engineering Chemistry, vol. 40, 1948, pp. 393-397.
Smirnov et al., "Reaction of 3-Alkenyl-2,3 Dialhylpseudoureas with Hydrazoic Acid", Zhurnal Obschchei Khimii, vol. 35, 1965, pp. 178-181.
Dingman et al. "Compare DGA and MEA Sweeting Methods", Hydrocarbon Processing, vol. 17, No. 7, Jul. 1968, pp. 138-140.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Process for converting cyclic urea to corresponding diamine in a does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for converting cyclic urea to corresponding diamine in a, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for converting cyclic urea to corresponding diamine in a will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-239975

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.