Two-stage reactor for the production of melamine

Details Two-stage reactor for the production of melamine Two-stage reactor for the production of melamine

2007-08-07

2007-08-07

Balasubramanian, Venkataraman (Department: 1624)

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C544S203000

Reexamination Certificate

active

10542306

ABSTRACT:
The present invention relates to a process for the catalytic preparation of melamine by decomposition of urea over particular solid catalysts using a main reactor and an after-reactor. A catalyst having a low Lewis acidity is used in the main reactor and a catalyst having an equal or preferably higher Lewis acidity is used in the after-reactor.

REFERENCES:
patent: 3300493 (1967-01-01), Hamprecht et al.
patent: 5350849 (1994-09-01), van de Moesdijk et al.
patent: 1209570 (1964-03-01), None
patent: 08-027126 (1996-01-01), None
Thianrangi Huagong, 2001, vol. 26, pp. 23-25.

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