US37824A - Improvement in refining sugar - Google Patents

Description

H. G. 0. PAULSEN. REPINING SUGAR.

No. 37,824. Patented Mar. 3,y 186:3.

UNITED STATES PATENT OFFICEc7 IMPROVEMENT IN RFINING SUGAR.

Specification forming part of Letters Patent No. 37,824, dated March 3 13613.

`To @ZZ whom, t may concern.-

Be it known that I, HERMAN G. C. PAUL` SEN, of New York, county and State of New York, have invented a new and Improved lNIode of Purifying Refined Crystallized Sugar of its Mother-Liquor or Sirup; and I do'hereby declare that the following is a full and eX- act description thereof.

.The nature of my invention consists in applying to the refined crystallized sugarabath of alcohol vapors of a low temperature, and effeetin g a condensation of said vapors on their entering and progressively penetrating the porous mass of sugar-crystals by having-previously cooled the .mass of sugar by injection of cold alcohol or a blast of cold air through it, thereby leaching or draining out the sirup suspended by capillary attraction between the crystals of sugar. y

To enable others skilled in the art to make and use my invention, I will proceed to describe its operation.

The vessel A., in which the sugar has to be crystallized, must be a closed vessel strong enough to sustain a vacuum. To this crystallization-vessel A must be attached a surface condenser, 13,' a receiver ot' condensed liquor, H, and an air-pump, C, for the purpose of having the sugar to be acted on in a vacuum to permit the vapors of a low temperatute to exist and to act as intended; but this attachment must be at the lowest part of the bottom of said crystallization-vessel at a, for the purpose of drawing the vapors and the liquor condensed in the sugar by the action of the air-pump C and condenser B through the mass of crystallized sugarin A. To the crystallization-vessel A is also attached or connected by means of pipes and other suitable ixtures a second vessel, I), the vapor-boiler containing the alcohol, from which the vapors are to be raised, and which vapor-boiler must be provided with all requisite fixtures of filling and feeding thercinto the alcohol, as well as to heat up to that temperature required for raising the vapors. rlChis communication ofthe vapor-boiler must be with the upper part or the top of the crystallizatioirvessel at I), for the purpose of entering therein the vapors above the surface of the sugar. The crystallization-vessel A is also connected with other vessels or set of vessels, d (Z d, so arranged as to receive the lowing-out mother-liquor or sirup and the alcohol used for washing out and cooling'the sugar. The vessel A must also be connected with another vessel, E, containing the cold alcohol, and with an ainforce pump, F. The alcohol from which the vapors are to be raised or that used for cooling the sugar is of eighty per cent., or above this, and the temperature of the vapors between 100 and 150o Fahrenheit.

The mode of operation is as follows: The crystallization of the sugar in the vessel A having been completed by cooling down to about 100O or 90o Fahrenheit,the mother-luy uor is first blown outA by a blast .0f cold air produced by the action of the air-force pump F. Said mother-liquor, flowing outat a, is received or enters the first of the vessels d. The communication of the crystallization-vessel A with all the other vessels is now opened, except with the reservoir of cold alcohol E, and that with the air-force pump Fis closed by means of the cock O. The required vacuum corresponding to the temperature of the vapers to be applied is formed by the action of the airpn1np Gand condenser B, and at the same time the alcohol in the vapor-boiler D is heated up to the temperature of the required vapors. This starts' directly the owin'g out or draining at c of the remaining mother-liquor out of the sugar, which sirup is also received by the vessel d. If the vacuum is of twenty-six inches, the temperature of the vapor-boiler will be about 110 to 115? Fahrenheit, and by raising the vacuum to twentyeight inches, but keeping the alcohol in the vapor-boiler at 1100 to 115 Fahrenheit, the vapors produce a small pressure on the surface of the draining-out mother-liquor, assisting thereby the penetration of the vapors into and through the porous mass of sugar or driving` the mother-liquor out. At thcsame time, the sugar being colder than the vapors, part ol' the vapors in penetrating downward, drawn by the action ofthe pump O and condenser B through the mass ot' sugar, condense, and in the act of condensing dissolve and extract the small quantity ofsirup which was left hang ing by capillary attraction among the small su gancrystals by cxpelli n g said motl1cr-liquor at the commencement of the operation. rlhis vapor bath having been continued till the hole crystallization-vessel A,With the sugar contains, has been heated yor warmed up by leans of the entering vapors to the same tem erature of said vapors, the ingress of vapors .-stopped by closing the cock h, and asufi-` .ent quantity of cold alcohol out of the veszl E is run into the crystallization-vessel A Kcool clown on penetrating the Whole mass of igar to a temperature suiciently 10W to ef- ;ct the condensation of said vapors, and at the une time washing out the sirup which was issolved or extracted by the condensing .vaors. All the vapors which pass through the ligar' are condensed in the condenser B, and he condensefl` alcohol is collected in the reeiver H. After this the sameoperation is to be rcpeatedfcommencing by blowing out the4 Witnesses:

H. KATTENIIORN, A. Som-LADER.

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