METHOD FOR PRODUCING UREA AMMONIUM SULPHATE

• Main Authors: VAN BELZEN, Ruud, WINNE, Erika, VOLKE, Howard
• Format: Patent
• Language: English; French; German
• Published: 08.11.2023
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; AMMONIA; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; CYANOGEN; FERTILISERS; INORGANIC CHEMISTRY; MANUFACTURE THEREOF; METALLURGY; NITROGENOUS FERTILISERS; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The present invention relates to a method for the production of urea ammonium sulphate (UAS) from sulphuric acid, ammonia and/or ammonium carbamate, and urea, in a reactor wherein a feed of sulphuric acid, ammonia and/or ammonium carbamate, and urea is combined to obtain said urea ammonium sulphate (UAS), comprising the step of including a viscosity reducing agent, selected from the group of water soluble aluminium salts, into a solution or slurry of said urea ammonium sulphate (UAS), obtained using said process. Preferably, said agent is an aluminium sulphate (AluS). The present invention also relates to a pipe reactor for the production of a urea ammonium sulphate (UAS) composition from sulphuric acid, ammonia and/or ammonium carbamate, and urea, wherein the pipe reactor further comprises means for supplying a viscosity reducing agent to the urea solution upstream of a pipe reactor section where said urea solution is mixed with ammonium sulphate, to produce a UAS solution or slurry, which agent reduces the viscosity of said UAS solution or slurry. The present invention also relates to the use of aluminium sulphate as viscosity reducing agent in a liquid urea ammonium sulphate composition.