METHOD OF PRODUCING TEREPHTHALIC ACID DIAMIDE Russian patent published in 2012 - IPC C07C231/02 C07C231/10 C07C233/65 

FIELD: chemistry.

SUBSTANCE: invention relates to a novel method of producing terephthalic acid diamide which can be used in production of polymers, involving reaction of terephthalic acid with ammonia, wherein the reaction takes place in a fluidised bed at atmospheric pressure, first at temperature (75-80)°C and ratio acid: gaseous ammonia equal to 1:2-5, while feeding ammonia in amount of 22.05-410.3 l/h and carrying out the reaction for 1.0-2.5 hours until formation of a diammonium salt of terephthalic acid, and then at temperature 240-260°C and ammonia flowrate of 2-5 l/h, while feeding nitrogen in an amount which is sufficient to maintain the fluidised bed and carrying out the reaction for 2-4 hours until release of water ceases.

EFFECT: creating an environmentally safe method by avoiding the need to use volatile reactants, which ensures high output (95-98%) and high quality of the end product.

1 cl, 7 ex