| 摘要 |
Reactor in the form of simplified continuous tube, comprises an upper reactor region and a lower reactor region. The upper reactor region comprises an inlet region for the addition of prepolymer melt, a heating unit (12), a first flow tube, a heated discharge cone, and a wall heater. The lower reactor region comprises an inlet region for the addition of the melt from the upper reactor region and for the separation of process steam, a static refrigeration unit (13), a second flow tube, a heated discharge cone, and a wall heater. Reactor in the form of simplified continuous tube, comprises an upper reactor region and a lower reactor region. The upper reactor region comprises an inlet region for the addition of prepolymer melt, a heating unit (12), a first flow tube, a heated discharge cone, and a wall heater that is arranged over the entire height of the upper reactor region. The lower reactor region comprises an inlet region for the addition of the melt from the upper reactor region and for the separation of process steam, a static refrigeration unit (13), a second flow tube, a heated discharge cone having a discharge conduit, and a wall heater that is arranged over the entire height of the lower reactor region. The upper and lower regions are connected by a line. Independent claims are included for: (1) the polymerization of polyamides in the reactor, comprising (a) providing the prepolymer in the inlet region of the upper reactor region, (b) heating the prepolymer melt in the heating unit at a temperature of 240-280[deg] C, preferably 250-265[deg] C, (c) passing the heated prepolymer melt through a cooling unit and then passing through the first flow pipe, which is coupled with a separate heating unit, in which the polymer melt temperature is 225-260[deg] C, preferably 230-240[deg] C, and (d) passing the prepolymer melt through the second flow pipe which is coupled with a separate heating unit to avoid a heat loss and then transporting through an outlet pipe; and (2) the polyamide obtained by the above method, having a relative viscosity of 2.4-4.5, preferably 3-3.6, measured in a solution of 1 g of polyamide in 96% sulfuric acid. |
