Method and reactor for producing urea ammonium sulphate
AssigneeYara International Asa
InventorsRuud Van Belzen, Howard Volke, Erika Winne
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Abstract
A method for the production of a urea ammonium sulphate (UAS) composition in a pipe reactor comprising at least a reactor section, the method comprising: combining in the reactor continuous feeds of at least one of sulphuric acid and ammonium bisulphate, at least one of ammonia and ammonium carbamate, and urea; and including a viscosity-reducing agent selected from water soluble aluminum salts in at least one of the continuous feeds, thereby forming the urea ammonium sulphate (UAS composition, wherein the UAS composition comprises 1 to 40 weight % of ammonium sulphate (AS) relative to the total weight of the UAS composition.
Claims19
A method for the production of a urea ammonium sulphate (UAS) composition in a pipe reactor comprising at least a reactor section, the method comprising:
- combining in the reactor continuous feeds of at least one of sulphuric acid and ammonium bisulphate, at least one of ammonia and ammonium carbamate, and urea;
- and
- including a viscosity-reducing agent selected from water soluble aluminum salts in at least one of the continuous feeds, thereby forming the urea ammonium sulphate (UAS) composition, wherein the UAS composition comprises 1 to 40 weight % of ammonium sulphate (AS) relative to the total weight of the UAS composition.
A method for the production of urea ammonium sulphate in a pipe reactor comprising at least a reactor section wherein continuous feeds of at least one of sulphuric acid and ammonium bisulphate, at least one of ammonia and ammonium carbamate, and urea are combined to obtain said urea ammonium sulphate (UAS) composition, wherein the pipe reactor further comprises a means for supplying an aqueous solution of a viscosity-reducing agent to the urea solution upstream of the pipe reactor section, which agent reduces the viscosity of the UAS composition, wherein the composition is in the form of a solution or slurry
- the method comprising:
- axially injecting the feed of the at least one of sulphuric acid and ammonium bisulphate into the pipe reactor;
- injecting the at least one of the ammonia and ammonium carbamate into the pipe reactor;
- supplying the urea solution to the pipe reactor;
- and
- supplying the aqueous solution of the viscosity-reducing agent to the urea solution, upstream of the pipe reactor section thereby reducing the viscosity of the UAS solution or slurry.
Dependencies are inferred from the claim text.