Method for producing solid urea by granulation, wherein the granulation is fed with liquid urea having a purity greater than 98% by weight and not containing formaldehyde.

The present disclosure provides a composition for treating urea particles under ambient atmospheric conditions, a method for treating urea particles with the composition and to a fertiliser treated with the composition. The composition functions to reduce moisture induced agglomeration of treated urea particles compared to moisture induced agglomeration of untreated urea particles. The composition includes a solvent and a mixture of a first and a second aliphatic compound, each compound respectively comprising a selected C.sub.8-C.sub.14 saturated straight chain hydrocarbon a selected C.sub.15-C.sub.19 saturated straight chain hydrocarbon.

The present disclosure provides a composition for treating urea particles under ambient atmospheric conditions, a method for treating urea particles with the composition and to a fertiliser treated with the composition. The composition functions to reduce moisture induced agglomeration of treated urea particles compared to moisture induced agglomeration of untreated urea particles. The composition includes a solvent and a mixture of a first and a second aliphatic compound, each compound respectively comprising a selected C.sub.8-C.sub.14 saturated straight chain hydrocarbon a selected C.sub.15-C.sub.19 saturated straight chain hydrocarbon.

A process of granulation of a urea melt, comprising: adding a first additive containing carboxymethyl starch to one or more first stage(s) of the granulation process, to form a carboxymethyl starch containing inner layer of urea granules, and adding a second additive containing calcium lignosulfonate to one or more second stage(s) of the granulation process, downstream said first stages, to form granules with a coating containing calcium lignosulfonate.

A process of granulation of a urea melt, comprising: adding a first additive containing carboxymethyl starch to one or more first stage(s) of the granulation process, to form a carboxymethyl starch containing inner layer of urea granules, and adding a second additive containing calcium lignosulfonate to one or more second stage(s) of the granulation process, downstream said first stages, to form granules with a coating containing calcium lignosulfonate.

The present disclosure provides a composition for treating urea particles under ambient atmospheric conditions, a method for treating urea particles with the composition and to a fertiliser treated with the composition. The composition functions to reduce moisture induced agglomeration of treated urea particles compared to moisture induced agglomeration of untreated urea particles. The composition includes a solvent and a mixture of a first and a second aliphatic compound, each compound respectively comprising a selected C.sub.8-C.sub.14 saturated straight chain hydrocarbon a selected C.sub.15-C.sub.19 saturated straight chain hydrocarbon.

The present disclosure provides a composition for treating urea particles under ambient atmospheric conditions, a method for treating urea particles with the composition and to a fertiliser treated with the composition. The composition functions to reduce moisture induced agglomeration of treated urea particles compared to moisture induced agglomeration of untreated urea particles. The composition includes a solvent and a mixture of a first and a second aliphatic compound, each compound respectively comprising a selected C.sub.8-C.sub.14 saturated straight chain hydrocarbon a selected C.sub.15-C.sub.19 saturated straight chain hydrocarbon.

Disclosed is a shell-and-tube heat exchanger type with a tube bundle and has a redistribution chamber connected to tubes of the tube bundle and to a duct. The duct extends between the redistribution chamber and the shell.

Disclosed is a shell-and-tube heat exchanger type with a tube bundle and has a redistribution chamber connected to tubes of the tube bundle and to a duct. The duct extends between the redistribution chamber and the shell.

Processes and plants for the production of purified urea solution are described. In a described urea production process, urea is produced in a synthesis section without a high pressure stripper and the urea solution is subjected to purification after the recovery section, to give purified urea solution and off-gas. The purification comprises e.g. steam stripping.