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

Yaremwe na

Charlie

31. Ukwakira 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.
Hejuru
1 day

Amabwiriza

1

Make the caustic wash

Make 10 % potassium hydroxide in water.

Ibikoresho bikenewe:

Idorokiside ya potasiyumuIdorokiside ya potasiyumu
AmaziAmazi
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.

Ibikoresho by'iyi ntambwe:

FuraneFurane1 as required

Ibikoresho bikenewe:

Igifuniko gitandukanyaIgifuniko gitandukanya
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.

Ibikoresho by'iyi ntambwe:

HidorojeniHidorojeni1 as required

Ibikoresho bikenewe:

Umusemburo wa nikeli kuri kiselugureUmusemburo wa nikeli kuri kiselugure
Reyakitori y'igitutuReyakitori y'igitutu
Igipima UmuvudukoIgipima Umuvuduko
Igipima UbushyuheIgipima Ubushyuhe
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.

Ibikoresho

2
  • 2
    Furane
    1 as required
    Umwanya
  • 3
    Hidorojeni
    1 as required
    Umwanya

Ibikoresho bikenewe

7

Iki gishushanyo gikora

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Agateganyo

Tetrahidorofurane

Free

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Blueprint zijyanye

Izi blueprint zisangira ubumenyi — uburyo, ibikoresho cyangwa amahame

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)

na CharlieDE

Kamere

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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)
Akaga

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

na CharlieDE

Kamere

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CC0 Umurenge rusange

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