Trioxane composition and method for storing same

Patent metadata

Field	Value
Publication number	US-10227448-B2
Application number	US-201715858399-A
Country	US
Kind code	B2
Filing date	Dec 29, 2017
Priority date	Jul 9, 2013
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

The present invention provides a trioxane composition which comprises trioxane as a main component, an antioxidant, and at least one alkaline organic compound selected from the group consisting of an amine compound having an alcoholic hydroxy group in the molecule thereof, a thiocarbamate compound, and an organophosphorus compound, wherein the amount of the alkaline organic compound contained is 0.01 to 10 ppm, based on the trioxane, and wherein the trioxane composition is a liquid.

First claim

What is claimed is:

1. A method for storing a polymerizable trioxane composition, the method comprising:
providing a polymerizable trioxane composition comprising trioxane as a main component, an antioxidant, and an amine compound having an alcoholic hydroxy group in the molecule thereof, wherein the amount of the amine compound contained is 0.01 to 10 ppm, based on the trioxane;
maintaining the polymerizable trioxane composition in a molten state for a period of time between 0.1 hour and 30 days; and,
at the expiration of the period of time, subjecting the polymerizable trioxane composition to purification treatment for removing impurities.

2. The method according to claim 1 , wherein the amine compound is a tertiary amine compound having an alcoholic hydroxy group in the molecule thereof.

3. The method according to claim 1 , wherein the amine compound is triethanolamine.

4. The method according to claim 1 , wherein the antioxidant is at least one compound selected from the group consisting of a phenolic compound and a hindered phenol compound; and wherein the amount of the antioxidant contained is 10 to 500 ppm, based on the trioxane.

5. The method according to claim 1 , wherein the content of the trioxane in the trioxane composition is 95% or more.

Assignees

• Mitsubishi Gas Chemical Co

Inventors

• Okui Yumi
• Kobayashi Daisuke
• Ito Akira

Classifications

• C07D323/06 Primary

  Trioxane · CPC title

• C08L59/04

  Copolyoxymethylenes · CPC title

• C08G2/10

  Polymerisation of cyclic oligomers of formaldehyde · CPC title

• C08G65/16 Primary

  Cyclic ethers having four or more ring atoms · CPC title

• C08G2/24

  with acetals · CPC title