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Tetrahydrofuran from Caustic-Washed Furan Hydrogenated over Nickel on Kieselguhr (Banford and Manes, du Pont, US 2,846,449)
Charlie

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Charlie

31. uMfumfu 2026DE
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Tetrahydrofuran from Caustic-Washed Furan Hydrogenated over Nickel on Kieselguhr (Banford and Manes, du Pont, US 2,846,449)

Furan from furfural carries a little carbon dioxide and water that distilling does not remove, and they hold back the hydrogenation. Banford and Manes washed the furan with dilute potash first; then nickel on kieselguhr turned nearly all of it into tetrahydrofuran. Result: tetrahydrofuran, conversion raised from 85-90 % to 97 %. Source: Banford and Manes, US 2,846,449 (du Pont, 1958), Example 1. Not given: how the THF is drawn off. Picture drawn by Youblob.
Osezingeni eliphezulu
1 day

Imiyalelo

1

Make the caustic wash

Make 10 % potassium hydroxide in water.

Amathuluzi adingekayo:

I-potassium hydroxideI-potassium hydroxide
AmanziAmanzi
2

Wash the furan

Pass distilled furan up through the caustic in a column packed with porcelain saddles, then let suspended caustic settle out. Ours at small scale: shake in a separatory funnel and draw off the caustic.

Izinto zokwakha zalesi sinyathelo:

I-furanI-furan1 as required

Amathuluzi adingekayo:

Ifasitela lokwehlukanisaIfasitela lokwehlukanisa
3

Hydrogenate

Heat the washed furan and feed it with hydrogen to a hydrogenator holding active nickel on kieselguhr at 85-100 C and about 500 psi gauge.

Izinto zokwakha zalesi sinyathelo:

I-hydrogenI-hydrogen1 as required

Amathuluzi adingekayo:

Isivusamandla se-nickel ku-kieselguhrIsivusamandla se-nickel ku-kieselguhr
I-reactor yengcindeziI-reactor yengcindezi
Isilinganiso SengcindeziIsilinganiso Sengcindezi
IthemomithaIthemomitha
4

Check the conversion

Washed furan gives about 97 % tetrahydrofuran; unwashed only 85-90 %. Raising the feed to 105 C does not help unwashed furan.

Izinto

2
  • 2
    I-furan
    1 as required
    Isibambeli
  • 3
    I-hydrogen
    1 as required
    Isibambeli

Amathuluzi Adingekayo

7

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I-tetrahydrofuran

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Furan from Furfural Vapour and Steam over Zinc-Iron Chromite (Whitman, du Pont, US 2,374,149)

Furan from Furfural Vapour and Steam over Zinc-Iron Chromite (Whitman, du Pont, US 2,374,149)

ngu-CharlieDE

Organic

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Furfural from Oat Hulls Steamed with Sulfuric Acid in a Rotary Digester (Miner and Brownlee, Quaker Oats, US 1,735,084)
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Furfural from Oat Hulls Steamed with Sulfuric Acid in a Rotary Digester (Miner and Brownlee, Quaker Oats, US 1,735,084)

ngu-CharlieDE

Organic

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