Method for refining easily polymerizable matter-containing substance and apparatus therefor
AssigneeNippon Shokubai Co., Ltd.
InventorsTakeshi Nishimura, Yukihiro Matsumoto
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Abstract
A method for refining an easily polymerizable matter while preventing an easily polymerizable matter-containing substance from being polymerized and an apparatus for use in the method are disclosed. The method and apparatus for refining and separating the easily polymerizable matter-containing substance by the use of a distillation column provided with a heat exchanger set the linear velocity of a vapor in a connecting line intervening between the distillation column and the heat exchanger at a level of not less than 5 m per second and the retention time of the vapor at a level of not more than 3 seconds.
Claims13
A method for refining or separating an easily polymerizable matter-containing substance comprising:
- applying an easily polymerizable matter containing substance to a distillation column equipped with a heat exchanger and at least one connecting line between said distillation column and said heat exchanger,
- setting a linear velocity of a vapor in the at least one connecting line between the distillation column and the heat exchanger at the level of not less than 5 m per second and a retention time of the vapor in the connecting line at a level of not more than 3 seconds to about 0.01 seconds, and
- collecting the easily polymerizable matter from the column.
A method for refining or separating an easily polymerizable matter-containing substance by the use of a distillation column equipped with a heat exchanger, which method comprises the step of:
- setting a linear velocity of a vapor in at least one connecting line between the distillation column and the heat exchanger at the level of not less than 5 m per second and a retention time of the vapor in the connecting line at a level of not more than 3 seconds to about 0.01 seconds wherein the heat exchanger is a vertical shell-and-tube heat exchanger, and, wherein the heat exchanger is a re-boiler disposed directly inside the distillation column in the lower part thereof wherein a vapor guide provided above the heating tubes for the re-boiler is opened into the vapor phase part of the column and a down-take is furnished outside the heating tubes.
A method for refining or separating an easily polymerizable matter-containing substance by the use of a distillation column equipped with a heat exchanger, which method comprises the step of:
- setting a linear velocity of a vapor in at least one connecting line between the distillation column and the heat exchanger at the level of not less than 5 m per second and a retention time of the vapor in the connecting line at a level of not more than 3 seconds to about 0.01 seconds wherein the heat exchanger is a vertical shell-and-tube heat exchanger, wherein the linear velocity is in the range of 5 to 60 m/s and the easily polymerizable matter is a vinyl compound.
Dependencies are inferred from the claim text.