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Updated: May 19, 2025
When tallow is saponified there is formed, from the palmitin, stearin, and olein contained, with the cauticizing agent in this case, lime a soap.
The operation was extremely simple, and if it did not yield absolutely perfect results, they were at least very useful. Cyrus Harding would only have had at his disposal sulphuric acid, but by heating this acid with the neutral fatty bodies he could separate the glycerine; then from this new combination, he easily separated the olein, the margarin, and the stearin, by employing boiling water.
Pure olein, supposing none of the liberated acid to be dissolved in water, would yield 95.7 per cent. of fatty acid. The acid was evidently a mixture, and had no definite melting point.
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