JP2004261683A5 - - Google Patents

Claims (7)

  The cylinder includes a cylinder that forms part of a path through which a gas phase containing an easily polymerizable substance passes, and the cylinder includes a jacket that surrounds an outer periphery of the cylinder. An easily polymerizable material passage device.   2. The easily polymerizable substance passage device according to claim 1, wherein the cylindrical body is a cylindrical body installed in a portion of the path in which a gas phase temperature distribution is within 2 ° C. 3.   The easily polymerizable substance passage device according to claim 1 or 2, wherein the temperature of the reduced-pressure steam is set to be higher by 0.1 to 15 ° C than the temperature of the gas phase passing through the cylindrical body.   It has a discharge pipe for the steam drain generated in the jacket, this discharge pipe extends vertically downward from the bottom of the jacket, rises in a U-shape, and is connected to a discharge port that is always open. The easily polymerizable substance passage device according to any one of claims 1 to 3.   A method of distilling an easily polymerizable substance using a distillation column, a steam delivery line, and a condenser, comprising: a cylindrical body constituting at least a part of a portion of the distillation tower that extends from an empty portion to the steam delivery line A method for distilling an easily polymerizable substance, comprising: the easily polymerizable substance passing device cylinder according to any one of claims 1 to 4.   In the method for producing hydroxyalkyl (meth) acrylate, comprising a step of producing a hydroxyalkyl (meth) acrylate and a step of distillation, wherein the step of distillation is performed with a distillation column, a vapor feed line and a condenser. The method for distilling an easily polymerizable substance according to claim 5, which is the step of distilling. A method of distilling an easily polymerizable substance using a distillation column, a steam delivery line, and a condenser, comprising at least part of a portion of the distillation tower that extends from an empty portion to the steam delivery line, The easily polymerizable substance is obtained by uniformly heating and maintaining the cylinder through which a gas phase of less than 100 ° C. containing the vapor of the polymerizable substance passes at a temperature 0.1 to 15 ° C. higher than the temperature of the gas phase. A method for distilling an easily polymerizable substance, wherein the gas phase is allowed to pass through the cylinder without causing condensation or polymerization of the polymer.