Process for the continuous polymerisation of polyamides

Claim 1

A CONTINOUS PROCESS FOR THE MANUFACTURE OF HIGH MOLECULAR WEIGHT LINEAR POLYAMIDES BY CONDENSATION POLYMERISATION COMPRISING PASSING AN AQUEOUS SOLUTION OF A POLYAMIDEFORMING MONOMER UNDER CONDITIONS OF ELEVATED TEMPERATURES AND SUPER-ATMOSPHERIC PRESSURE THROUGH ELONGATE REACTION ZONE DEFINED BY THE FOLLOWING CONDITIONS; I D DECREASES, AS V INCREASES. NEVER DECREASES, AS V INCREASES II V HAS A VALUE FROM 16000Q TO 10000Q, III LOG DMAX= 1.00 + 0.143 TAN :1((0.1V/Q)-40)+0.36 LOG Q. IV LOG DMIN =1.00 + 0.250 TAN -1(0.002 V/Q) --2)+0.36 LOG Q. Q = RATE OF OUTPUT OF POLYAMIDE (THROUGHOUT) IN KILOGRAMS PER HOUR V = TOTAL VOLUME OF THE REACTION ZONE IN CUBIC CENTIMETRES V = VOLUME OF THE REACTION ZONE FROM ITS INLET END UP TO A GIVEN POINT ALONG ITS LENGTH IN CUBIC CEMTIMETRES. D. = DIAMETER OF REACTION ZONE AT ANUY GIVEN POINT ALONG ITS LENGTH IN MILLIMETRES DMAX = MAXIMUM DIAMETER OF REACTION ZONE AT ANY GIVEN POINT ALONG ITS LENGTH IN MILLIMETRES DMIN= THE MINIMUM VALUE OF THE ABOVE DIAMTER, AT LEAST THE INNER SURFACE OF SAID SLONGATE REACTION ZONE COMPRISING METALLIC TITANIUM.