Process for ammonia recovery
First Claim
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1. An improved ammonia recovery system comprising:
- (a) an ASD system and (b) a purification column, operably connected to the ASD system wherein at least a portion of the ASD system is comprised of a material of construction having less than 20% nickel by weight.
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Abstract
An improved process for ammonia recovery is provided for the recovery of substantially pure ammonia for use in industrial processes. In this improved method, specific raw materials and/or specific materials of construction are used. Overall efficiency and operational cost savings are increased as a result of the process of the present invention.
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Citations
55 Claims
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1. An improved ammonia recovery system comprising:
(a) an ASD system and (b) a purification column, operably connected to the ASD system wherein at least a portion of the ASD system is comprised of a material of construction having less than 20% nickel by weight. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 20, 21, 22, 23, 24, 25, 26, 27, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
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15. An improved ammonia recovery system comprising:
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(a) an ASD system, containing a capture solution and (b) a purification column, operably connected to the ASD system, wherein a fresh capture solution is fed to the ASD system and the fresh capture solution has a nickel concentration of less than 250 ppm.
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18. An improved ammonia recovery system comprising:
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(a) an absorber, operably connected to (b) a stripper, which, in turn, is operably connected to (c) a dissociation-purification column, wherein at least a portion of the stripper and/or at least a portion of the dissociation-purification column is comprised of a material of construction having not more than 20% nickel by weight.
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28. An improved ammonia recovery system comprising:
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(a) an absorber, operably connected to (b) a stripper, which, in turn, is operably connected to (c) a dissociation-purification column, wherein the absorber contains a capture solution and wherein a fresh capture solution having a nickel concentration of less than 250 ppm is fed to the absorber.
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29. An improved process for the recovery of ammonia from an industrial process stream comprising the steps of:
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(a) providing an apparatus for the recovery of ammonia comprising;
(i) an ASD system, and (ii) a purification column, operably connected thereto wherein a portion of the ASD system is comprised of a material of construction having not more than 20% nickel by weight;
(b) conveying an industrial process stream containing ammonia to the apparatus; and
(c) refining the industrial process stream containing ammonia in the apparatus provided to produce a concentrated ammonia process stream.
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43. An improved process for the recovery of ammonia from industrial process streams comprising the steps of:
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(a) providing an apparatus for recovering ammonia comprising;
(i) an absorber, operably connected to (ii) a stripper, which, in turn, is operably connected to (iii) a dissociation-purification column, wherein at least a portion of one or more of the absorber, the stripper, or the dissociation-purification column is comprised of a material of construction having less than 20% nickel by weight;
(b) conveying an industrial process stream comprising ammonia to the apparatus; and
(c) refining the industrial process stream comprising ammonia in the apparatus provided to produce a concentrated ammonia product stream. - View Dependent Claims (44, 45, 46, 47, 49, 50, 51, 52)
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48. An improved process for the recovery of ammonia from industrial process streams comprising the steps of:
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(a) providing an apparatus containing a capture solution for recovering ammonia comprising;
(i) an absorber, operably connected to (ii) a stripper, which, in turn, is operably connected to (iii) a dissociation-purification column, (b) adding a fresh capture solution having a nickel concentration of less than 250 ppm to the apparatus;
(c) conveying an industrial process stream comprising ammonia to the apparatus; and
(d) refining the industrial process stream comprising ammonia in the apparatus provided to produce a concentrated ammonia product stream.
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53. An improved process for the recovery of ammonia from an industrial process stream comprising the steps of:
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(a) providing an apparatus for the recovery of ammonia comprising;
(i) an ASD system containing a capture solution and (ii) a purification column, operably connected thereto (b) adding a fresh capture solution having a nickel concentration of less than about 250 ppm to the ASD system;
(c) conveying an industrial process stream containing ammonia to the apparatus; and
(d) refining the industrial process stream containing ammonia in the apparatus provided to produce a concentrated ammonia process stream. - View Dependent Claims (54, 55)
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Specification