Ammonia → Sulfuric acid diammonium salt, compd. with urea
Reaction equation
[NH3:1].C(=O)([O-])[NH2:3].[NH4+].[NH2:7][C:8]([NH2:10])=[O:9].[S:11](=[O:15])(=[O:14])([OH:13])[OH:12]>>[NH2:7][C:8]([NH2:10])=[O:9].[S:11]([O-:15])([O-:14])(=[O:13])=[O:12].[NH4+:3].[NH4+:1]Participants
Procedure
WO 01/51429 relates to a method for producing a fertilizer containing ammonium sulphate and urea. An aqueous urea solution is provided which, with regard to the total weight of the solution, contains 0.1 to 50 wt. % of free ammonia and/or of ammonia that is bound in the form of ammonium carbamate. Said aqueous urea solution is reacted with sulphuric acid and, optionally, with ammonia at a temperature ranging from 25 to 250° C. and at a pressure ranging from 0.1 to 250 bar. A urea-ammonium sulphate solution or suspension is formed in quantities that result in a weight ratio of ammonium sulphate to urea in this urea-ammonium sulphate solution or suspension that ranges from 10:90 up to 65:35. Carbon dioxide and ammonia expelled under these conditions are returned to the urea synthesis. Afterwards, this urea-ammonium sulphate solution or suspension is subjected to a subsequent processing in order to produce solid or liquid fertilizers.
Workup
- customranging from 25 to 250° C. and at a pressure
Sources & evidence
- ORD record
- ord-326ff9993bcf4fe9821c65807cbef692
- Source dataset
- uspto-grants-2010_11
- Patent number
- US07837758B2
Reaction notes
Loading…