IP Library › Granted Patent US 10,472,311
Granted Patent B2
US 10,472,311 · App. 15/157,639 · Granted Nov 12, 2019

1,4-butanediol-containing composition

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Quick Facts
Patent No.
US 10,472,311
App. No.
15/157,639
Granted
Nov 12, 2019
Kind
B2
Abstract

A 1,4-butanediol-containing composition having a concentration of 1,4-butanediol of 99.00% by weight or more and not more than 99.99% by weight and containing 2-pyrrolidone or N-methylpyrrolidone in a concentration, as converted into a nitrogen atom, of from 1.0 to 25 ppm by weight and methods of use thereof.

Claims (3)

1. A 1,4-butanediol-containing composition having a concentration of 1,4-butanediol of 99.00% by weight or more and not more than 99.99% by weight and containing 2 pyrrolidone or N-methylpyrrolidone in a concentration, as converted into a nitrogen atom, of from 1.0 to 25 ppm by weight.

2. The 1,4-butanediol-containing composition according to claim 1 , which has a pH is 5.0 or more and not more than 7.9.

3. The 1,4-butanediol-containing composition according to claim 1 , which has a thermal stability as measured by the formation of tetrahydrofuran of not greater than about 2998 ppm by weight.

Assignments (2)
CHANGE OF NAME Recorded Sep 5, 2017
From: MITSUBISHI RAYON CO., LTD.
To: MITSUBISHI CHEMICAL CORPORATION
Reel/Frame 043750/0834 →
MERGER Recorded Sep 4, 2017
From: MITSUBISHI CHEMICAL CORPORATION
To: MITSUBISHI RAYON CO., LTD.
Reel/Frame 043750/0207 →