vacuum-pan

After the concentration has proceeded far enough, the action of the heat is suspended, and the reddish-brown, oily-looking liquid is drawn into the vacuum-pan till it is about a third full; the concentration is completed by boiling the juice in vacuo at a temperature of 150 degrees, and even lower.

The Hawaiian Archipelago Isabella Lucy 2004

Also in 1885 the Government acquired a sugar-machinery plant with vacuum-pan for their model estate at San Ramon in the Province of Zamboanga; the sugar turned out at the trial of the plant in my presence was equal to 21 D.S. of that year.

The Philippine Islands John Foreman

Should sugar of a whiter quality than the ordinary muscovado of commerce be desired, this advantage may be readily obtained, as Mr. Fownes judiciously observes, by filtering the thin syrup, ready for the vacuum-pan, through a bed of fine charcoal, as is done by the sugar refiners, and afterwards washing the crystals of sugar with white syrup, when the molasses has thoroughly drained from them.

The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. P. L. Simmonds

After the concentration has proceeded far enough, the action of the heat is suspended, and the reddish-brown, oily-looking liquid is drawn into the vacuum-pan till it is about a third full; the concentration is completed by boiling the juice in vacuo at a temperature of 150 degrees, and even lower.

The Hawaiian Archipelago 1867

It is not improbable that, by re-boiling the molasses in the vacuum-pan, and employing tannin in the manner adopted in the process for making sugar from beet-root, from one to five per cent. of crystallisable sugar could be recovered from it, and this per centage might possibly even be found to admit of increase by the further treatment with lime-water and the gun-stock tree s already suggested, for the first clarification of the liquor received from the mill.

The Commercial Products of the Vegetable Kingdom Considered in Their Various Uses to Man and in Their Relation to the Arts and Manufactures; Forming a Practical Treatise & Handbook of Reference for the Colonist, Manufacturer, Merchant, and Consumer, on the Cultivation, Preparation for Shipment, and Commercial Value, &c. of the Various Substances Obtained From Trees and Plants, Entering into the Husbandry of Tropical and Sub-tropical Regions, &c. P. L. Simmonds

There is also a peculiarly fascinating apparatus known as a vacuum-pan, peeping into which, through a little tale window, a species of brown porridge transforms itself into crystallised sugar of the sort known to housekeepers as "Demerara" under your very eyes; and another equally attractive, rapidly revolving machine in which the molasses, by centrifugal force, detaches itself from the sugar, and runs of its own accord down its appointed channels to the rum distillery, where

Here, There and Everywhere Frederick Spencer Hamilton 1892