Pekk manufacturing process

Process for manufacturing a polyether ketone ketone, involving:

• placing in contact an aromatic ether which is diphenyl ether, 1,3-bis(4-phenoxybenzoyl)benzene, 1,4-bis(4-phenoxybenzoyl)benzene or a mixture thereof, an acyl chloride which is isophthaloyl chloride, terephthaloyl chloride, or a mixture thereof, a Lewis acid, and a first fraction s1 of a reaction solvent, so as to form a premix at a temperature T0 less than or equal to 25° C.;
• optionally, maintenance of the formed premix at T0;
• placing in contact the formed premix at T0 with a fraction s2 of the reaction solvent, the fraction s2 of reaction solvent being preheated, so as to form a reaction mixture brought to a temperature T1 ranging from 40° C. to 80° C.;
• and
• optionally maintaining the formed reaction mixture at T1.