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

Imeundwa na

Charlie

31. Oktoba 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.
Juu
1 day

Maagizo

1

Make the caustic wash

Make 10 % potassium hydroxide in water.

Zana zinazohitajika:

Hidroksidi ya potasiamuHidroksidi ya potasiamu
MajiMaji
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.

Vifaa kwa hatua hii:

FuraniFurani1 as required

Zana zinazohitajika:

Funeli ya KutenganishaFuneli ya Kutenganisha
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.

Vifaa kwa hatua hii:

HidrojeniHidrojeni1 as required

Zana zinazohitajika:

Kichocheo cha nikeli juu ya kiselguriKichocheo cha nikeli juu ya kiselguri
Riakta ya shinikizoRiakta ya shinikizo
Kipima ShinikizoKipima Shinikizo
KipimajotoKipimajoto
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.

Vifaa

2
  • 2
    Furani
    1 as required
    Kishikilia Nafasi
  • 3
    Hidrojeni
    1 as required
    Kishikilia Nafasi

Zana Zinazohitajika

7

Mchoro huu unatengeneza

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Kishikilia nafasi

Tetrahidrofurani

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Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

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

Kikaboni

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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)
Hatari

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

na CharlieDE

Kikaboni

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