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Dibutyl Phthalate: Phthalic Anhydride and Butyl Alcohol, Water Drawn Off under Vacuum
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Charlie

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Charlie

19. Ukwakira 2026DE
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Dibutyl Phthalate: Phthalic Anhydride and Butyl Alcohol, Water Drawn Off under Vacuum

Dibutyl phthalate is an ester used to make PVC and other plastics soft. Crowell and Ebe's process (US 1,864,893, 1932) warms phthalic anhydride and butyl alcohol with a little sulphuric acid at 82–87 °C, then draws the water off under a gentle vacuum as it forms, carried over with butyl alcohol. What stays behind is nearly pure ester, about 97 % yield, with no need to distil the ester itself (it boils at 340 °C). The picture: our diagram.
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Dibutili Fatalate

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Phthalic Anhydride by Air Oxidation of Naphthalene: Gibbs and Conover, 1918

Phthalic Anhydride by Air Oxidation of Naphthalene: Gibbs and Conover, 1918

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n-Butanol and Acetone: Maize Mash Fermented by Weizmann's Bacteria

n-Butanol and Acetone: Maize Mash Fermented by Weizmann's Bacteria

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