Method for the manufacture of a urea-based composition comprising the addition of a liquid-free solid additive

A method for the manufacture of a homogeneous, solid, particulate, urea-based composition comprising urea and an additive, in a urea production plant comprising at least an evaporator section, a particulation section, and an effluent gas treatment section, further comprising at least one of:

• a mixing section, a scrubber solution storage section, or any combination thereof, wherein the method comprises at least the steps of:
• (i) concentrating in the evaporator section, a urea melt to 95 to 99 weight % of urea;
• (ii) particulating in the particulation section, the urea or the urea melt into a homogeneous, solid, particulate, urea-based composition, thereby producing an effluent gas comprising urea-based dust particles and ammonia gas;
• (iii) treating in the effluent gas treatment section, the effluent gas from the particulation section comprising urea-based dust particles and ammonia gas with an aqueous solution to produce a scrubber solution;
• wherein the additive is introduced into the urea or the homogeneous, solid, particulate, urea-based composition as a particulate liquid-free solid, by adding the additive to at least one of:
• (a) said effluent gas treatment section;
• (b) said scrubber solution storage section containing the scrubber solution;
• or
• (c) any combination thereof.