SU45286A1 - The method of obtaining tartaric acid - Google Patents

Description

The present invention relates to a method for producing tartaric acid from the green parts of a vine.

Production of tartaric acid on a factory scale is currently mainly based on waste from the wine industry, with tartar, wine yeast and tartaric acid being commonly used as such. However, the utilization of the above-mentioned wastes of wine-making industry cannot satisfy the increased demand for tartaric acid, which is currently finding wider application in the industry of the USSR.

A second present invention has developed a method for producing tartaric acid from the green parts of a vine, in which, according to Mach and Kurman, the content of tartaric acid varies between 2.4 and 19.4%.

The method consists in the fact that the green parts of the vine, without the addition of mineral acids, are extracted with hot water, which completely dissolves the tartaric compounds and partially tannins. The extract obtained is neutralized with lime milk, after which the precipitated calcium molten calcium is washed with water i jwicyTffirtiffa} i5T;

Already 150. It should be noted that the collection and processing of raw materials (green waste) should be carried out in the summer period, i.e. from about half of July until the end of August of the month.

Example. Fresh shoots with leaves are left on the plot for one day for the purpose of drying, after which the dried green mass is crushed into as small pieces as possible and the crushed mass is placed in bags of coarse canvas with a capacity of 8-10 kg each. Upon filling, the bags are tied up with a twine, after which they are placed in bass and seins on a false bottom of the boards, 30 cm above the present bottom. The bags are placed in 4-5 rows and filled with water before immersion. during the process of boiling submerged in water, a board with stones or heavy bars is laid above the bags.

When the pool is loaded, steam is opened and the mass is boiled for about 1 hour.

After boiling the whole mass, the water containing tartaric acid salt in a solution is drained into the pool below, after which the bags are hot pressed and the fluid flowing from the press is also drained into the collection basin intended

for precipitating the calcium salt of the acid.

For the precipitation of calcium tartrate, milk of lime is used, which is slowly, in small portions, poured into the liquid to be neutralized with careful stirring. Control of the reaction is carried out with litmus paper, the reaction being brought to a strictly neutral or slightly acidic, but by no means alkaline.

At the end of the neutralization process, the liquid in the pool is left alone for 6 hours, then slowly drained from the sediment. The precipitate is washed 2-3 times and

col alSf B M ffrRU-rdfbifiEr pS is wound onto specially installed goYG or one day stand boards for self-pressing. Next, the bags are transferred to a press and, after pressing, the wet weight of calcium tartrate is dried at 150 ° with thorough mixing.

The subject matter of the invention.

The method of producing tartaric acid from the green parts of the vine, wherein the green parts of the vine are extracted with hot water without the addition of mineral acids, and the resulting extract is processed in the usual way.