US166090A - Improvement in the manufacture of glucose - Google Patents

Description

snares mm oration WILLIAM GAR'ION, OF SOUTHAMPTON, ENGLAND.

IMPROVEMENT IN THE MANUFACTURE OF GLUCOSE.

Specification forming part of Letters Patent No. 166,090, dated July 27, 1875; application filed June 30, 1875.

To all whom it may concern:

Be it known that I, WILLIAM GARToN, of Southampton, England, brewer, have invented or discovered certain new and useful Improvements in the Manufacture of Sugar for Brewing and other purposes; and I do hereby declare that the following is a full, clear, and exact description thereof-that is to say My invention has reference to the manufacture of sugar composed partly of dextroglucose, obtained from rice or other amylaceous like sugar-producing substances or their products.

Dextro-glucose and lavo-glucose are two separate and distinct manufactures; but for the purposes of brewing it has been found beneficial to mix some of the dextro-glucose, obtained as aforesaid from amylaoeous substances, with laevo-glucose obtained from cane or beet.

In converting amylaceous substances into dextro-glucose by means of an acid and heat in the ordinary way, such conversion ceases as soon as the solution has attained a specific gravity of from 1.070 to 1.080, any further quantity of the amylaoeous substance which is added after this limit has been reached simply remaining in the form of starch. It has, therefore, been usual to nontralize the solution with chalk or other suitable material as soon as the conversion can be no longer carried on, and in consequence of the very low specific gravity great expense in fuel has been necessary for evaporating the water in the subsequent process of conccntration. On the other hand, in treating cane, beet, or such like crystallized sugar, so as to obtain lzevo-glucose, an inversion may be effected in solutions of specific gravities of even 1.200 to 1.275.

Now, the object of my invention is to effect economy in the manufacture of this combined article, by the processes as hereinafter described, whereby the acid usually employed in converting the amylaceous substances is saved, as well as a considerable amount of the fuel required for heating the solutions to the necessary temperatures, and for their concentration; and I am also able to effect substances, and partly of lwvo glucose, obtained from cane, beet, or other 1 the solution the admixture of the dextro-glucose and the laevo-glucose in the process of conversion, and to neutralize the acid employed for both at one operation.

For this purpose I place the rice or amylaceous substance in a suitable vessel, previously charged with boiling acid-water, and keep adding more rice and more acid until the mixture has reached the point of about 1.075, and I maintain the heat so long as any traces of starch can be detected-4. 0., until the conversion of the solution is complete; then, instead of neutralizing the mixture in the usual way atthis stage, I take advantage of the fact which I have ascertained by experiment, viz., that the acid employed in converting is further capable of inverting large proportions of crystallized sugar, while the glucose obtained from the rice still remains in or beet sugar to increase the gravity of the 'solution to about 1.275, and when the inverrately. I also dispense with the chalk or lime usually required for neutralizing the dextroglucose, and further save the large quantity of fuel that would have been necessary for concentrating the solution of dextro-glucose from 1.075 to 1.275 had it been manufactured separately.

By the means hereinbefore described I obtain an article composed of about twenty per cent. of dextro and eighty per cent. of lmvosugar, (which proportions may, however, be varied according to requirement,) specially adapted for brewing, and which may also be employed for wine and vinegar making, and for other purposes.

What I claim, and desire to secure by Letters Patent, is-- I therefore add sufficient cane The process of manufacting glucose from GARTON, have hereunto set my hand this starch and cane-sugar by heating alnylaeeous eleventh day of June, one thousand eight or starchy substances with acid in the ordihundred and seventy-five.

nary manner, and adding to the mixture cane WILLIAM GARTON. or beet sugar before neutralizing the acid, Witnesses: substantially as described. F. C. HILL,

In witness whereof I, the said WILLIAM JNO. L. BARON.