Provided is a novel process and a novel apparatus for urea production capable of performing heat recovery from a relatively low-temperature fluid. A process for urea production includes a synthesis step, a high-pressure decomposition step and a condensation step and includes a) a step of heat-exchanging steam condensate whose temperature is higher than 90° C. with another fluid to cool this steam condensate to 90° C. or less, b) a step of, by heat-exchanging the steam condensate obtained from the step a with a further fluid having a temperature lower than a temperature of the low-pressure steam, heating the steam condensate obtained from the step a, and c) a step of supplying the steam condensate obtained from the step b to the condensation step as the steam condensate for generating the low-pressure steam. An apparatus for performing the process.

Provided is a novel process and a novel apparatus for urea production capable of performing heat recovery from a relatively low-temperature fluid. A process for urea production includes a synthesis step, a high-pressure decomposition step and a condensation step and includes a) a step of heat-exchanging steam condensate whose temperature is higher than 90° C. with another fluid to cool this steam condensate to 90° C. or less, b) a step of, by heat-exchanging the steam condensate obtained from the step a with a further fluid having a temperature lower than a temperature of the low-pressure steam, heating the steam condensate obtained from the step a, and c) a step of supplying the steam condensate obtained from the step b to the condensation step as the steam condensate for generating the low-pressure steam. An apparatus for performing the process.

A process and apparatus for producing pure hydrogen from a syngas generated by the high temperature gasification of municipal, agricultural or industrial derived wastes. The process is able to make pure hydrogen to be further reacted with nitrogen to make ammonia and urea.

Described are a high pressure carbamate condenser, urea plant, and urea production process. The high pressure carbamate condenser as described is of the 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.

Described are a high pressure carbamate condenser, urea plant, and urea production process. The high pressure carbamate condenser as described is of the 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.

A process and plant for the co-production of methanol and ammonia together with urea production from a hydrocarbon feed without venting to the atmosphere carbon dioxide captured from the methanol or ammonia synthesis gas and without using expensive air separation units and water gas shift. Carbon dioxide is removed from flue gas from reforming section and used to convert partially or fully all ammonia into urea.

A process and plant for the co-production of methanol and ammonia together with urea production from a hydrocarbon feed without venting to the atmosphere carbon dioxide captured from the methanol or ammonia synthesis gas and without using expensive air separation units and water gas shift. Carbon dioxide is removed from flue gas from reforming section and used to convert partially or fully all ammonia into urea.

Combined apparatus (1) for the synthesis of urea from ammonia and carbon dioxide, comprising an internal wall (3) which delimits two coaxial zones (4) inside the apparatus, operating respectively as reaction (4) and condensation (5) zones, and optionally also comprising a stripping zone and/or a scrubber integrated in the same apparatus.

Combined apparatus (1) for the synthesis of urea from ammonia and carbon dioxide, comprising an internal wall (3) which delimits two coaxial zones (4) inside the apparatus, operating respectively as reaction (4) and condensation (5) zones, and optionally also comprising a stripping zone and/or a scrubber integrated in the same apparatus.

A urea production process comprises a step of synthesis of urea by reaction of ammonia and carbon dioxide, where at least part of the carbon dioxide for the urea reaction synthesis is produced in an oxy-combustion process; the oxy-combustion process is specifically a flameless oxy-combustion process.