Method for producing tetrahydrofuran
AssigneeMitsubishi Chemical Corporation
InventorsYusuke IZAWA, Masaru UTSUNOMIYA, Norikazu KONISHI, Kouta TANAKA
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Abstract
The present invention is concerned with a method for producing tetrahydrofuran including carrying out a dehydration cyclization reaction of 1,4-butanediol in the presence of an acid catalyst having a pKa value of not more than 4 within a reactor, wherein a raw material liquid containing 1,4-butanediol to be provided for the reaction contains from 0.01 to 0.35% by weight of 2-(4-hydroxybutoxy)-tetrahydrofuran and 1 ppm by weight or more and not more than 1,000 ppm by weight of at least one of an amine and an amide in terms of a concentration as converted into a nitrogen atom.
Claims11
A method for producing tetrahydrofuran, comprising:
- carrying out a dehydration cyclization reaction of 1,4-butanediol in a presence of an acid catalyst having a pKa value of not more than 4 within a reactor,
- wherein a raw material liquid containing 1,4-butanediol to be provided for the reaction contains from 0.01 to 0.35% by weight of 2-(4-hydroxybutoxy)-tetrahydrofuran and 1 ppm by weight or more and not more than 1,000 ppm by weight of at least one of an amine and an amide in terms of a concentration as converted into a nitrogen atom.
A method for producing tetrahydrofuran, comprising:
- carrying out a dehydration cyclization reaction of 1,4-butanediol in a presence of an acid catalyst having a pKa value of not more than 4 within a reactor,
- wherein a reaction liquid within the reactor contains 1 ppm by weight or more and not more than 10,000 ppm by weight of at least one of an amine and an amide in terms of a concentration as converted into a nitrogen atom.
Dependencies are inferred from the claim text.