摘要:
A reactor system operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The reactor system includes a heat exchanger for heating the reaction medium and a disengagement vessel for disengaging vapor from the heated reaction medium.
摘要:
This invention relates to a vertically disposed polymerization reactor (2) having a series of essentially circular tray assemblies (10); each tray assembly (10) having a central open vapor chimney (18) and a single flow path (26) composed of at least two loops (30, 32) wherein the liquid polymer flow is reversed by means of a substantially semi-circular turnaround wall (24); said trays having a liquid polymer tray inlet (14) and a liquid polymer tray outlet (16) for conducting a flow of the liquid polymer by means of a hydraulic gradient; each tray assembly (10) being open at the top for escape of vapor from the liquid polymer flow to the central open vapor chimney (18); and said trays (10) arranged in vertical disposition one above the other.
摘要:
A process to produce polyester product from alkylene oxide and carboxylic acid. More specifically this process relates to a process to produce polyethylene terephthalate where terephthalic acid and ethylene oxide are reacted to form a partially esterified terephthalic acid product and then the partially esterified product is further reacted with ethylene glycol to produce polyethylene terephthalate.
摘要:
The application is directed to a method for making copolyesters of terephthalic acid and a diol component including ethylene glycol and includes the steps of adding teraphthalic acid and diol to a first esterification reactor and then late addition of supplemental ethylene glycol subsequent to the first esterification reactor but prior to a point where the ethylene glycol partial pressure is reduced below about 300 torr.
摘要:
A multi-level tubular reactor operable to facilitate a chemical reaction in a reaction medium flowing therethrough. The tubular reactor can include a plurality of horizontally elongated and vertically spaced reactor segments coupled to and extending outwardly from a common header. One or more of the reactor segments can contain a tray that divides the internal volume of the reactor segment into upper and lower chambers. The reaction medium can flow away from the header in the upper chambers and back to the header in the lower chambers.
摘要:
This invention relates to a vertically disposed polymerization reactor (2) having a series of essentially circular tray assemblies (10); each tray assembly (10) having a central open vapor chimney (18) and two split-flow paths (26) each split-flow path (26) containing one reverse flow path wherein the liquid polymer flow is reversed by means of a substantially semi-circular turnaround region (24); said trays (10) having a liquid polymer tray inlet (14) and a liquid polymer tray outlet (16) for conducting a flow of the liquid polymer by means of a hyraulic gradient; each tray assembly (10) being open at the top for escape of vapor from the liquid polymer flow to the central open vapor chimney (18); and said trays (10) arranged in vertical disposition one above the other.
摘要:
This invention relates to a vertically disposed polymerization reactor (2) having a series of essentially circular tray assemblies (10); each tray assembly (10) having a central open vapor chimney (18) and a single flow path (26) composed of at least two loops (30, 32) wherein the liquid polymer flow is reversed by means of a substantially semi-circular turnaround wall (24); said trays having a liquid polymer tray inlet (14) and a liquid polymer tray outlet (16) for conducting a flow of the liquid polymer by means of a hydraulic gradient; each tray assembly (10) being open at the top for escape of vapor from the liquid polymer flow to the central open vapor chimney (18); and said trays (10) arranged in vertical disposition one above the other.
摘要:
A process for thermally crystallizing a polyester polymer by introducing pellets into a liquid medium having a temperature of at least 140°C within a liquid medium zone and crystallizing the submerged pellets at or above the vapor pressure of the liquid medium without increasing the molecular weight of the pellets, and while the pressure on at least a portion of the pellets is equal to or greater than the vapor pressure of the liquid medium, separating at least a portion of said pellets and at least a portion of the liquid medium from each other. The crystallization is desirably conducted in the liquid medium zone without mechanically induced agitation. Optionally, the pellets are formed by an underfluid pelletizer. There is also provided a process for thermally crystallizing solid pellets in a pipe by directing a flow of solid pellets in a liquid medium through a pipe having an aspect ratio L/D of at least 50:1, wherein the solid pellets are crystallized in the pipe at a liquid medium temperature greater than the Tg of the polyester polymer.
摘要:
The application is directed to a method for making copolyesters of terephthalic acid and a diol component including ethylene glycol and includes the steps of adding teraphthalic acid and diol to a first esterification reactor and then late addition of supplemental ethylene glycol subsequent to the first esterification reactor but prior to a point where the ethylene glycol partial pressure is reduced below about 300 torr.