SU41514A1 - The method of obtaining a mixture of calcium salts of butyric, acetic and lactic acids from acidic pulp water - Google Patents

Description

The author's certificate E 32492 describes the production of alcohols and acids from / lumpy waters. In the development of this method, the authors of the pastoral invention have found that it is possible to obtain a mixture of calcium salt of butyric acid, acetic acid and lactic acid from pulp water by treating it with lime milk until a pH of 9.5 is reached; after separating the precipitate formed from the filtrate, calcium salts are obtained by conventional treatment.

The acidic water is treated with lime milk until a mass of flocculent, easily filtering sediment is released (this corresponds to an isoelectric point of about 9.5 pH), and then the heated sediment is heated and filtered.

(the filtrate is pumped through the diggers to the vial and evaporated to saturation. After evaporation, the concentrated solution is fed to flat pans heated by a steam jacket and equipped with stirring tools. Ordinary (166) can be used instead.

vacuum apparatus. Passo: Grooves (or vacuum apparatus) a further significant amount of water is evaporated, and a mass of calcium salts of organic acids falls out of the mother liquor. A thick mixture of crystals and mother liquor (consistency of the sugar refinery plant) is released into the agitators, which further crystallize; at the same time, one would have expected the transition of part of the oily acid and acetic acid calcium to the mother liquor due to the greater solubility of these salts at lower temperatures. However, since the amount of water in the mother liquor must continuously decrease due to its transfer to calcium lactate crystals (water of crystallization), the concentration of mother syrup in relation to acetate and calcium butyrate will increase, and thus these salts should further crystallize. Upon oxidation, the thick mass is centrifugal, and here the crystallized mass

mixtures known; New salts are separated from the mother liquor.

The separated liquid can be additionally concentrated in pans until complete removal of the water and give a mixture of lower grade salts with a composition and with a greater amount of impurities.

A mixture of calcium salts (organic acids are converted in one way or another to a mixture of ethyl esters and then the latter is distilled off with or without vacuum.

The mixture of the esters is neutralized with anhydrous alkali of the subsection (:: if {rumble, it is purified by additional distillation and can be used for an inioro process application.

To obtain from this mixture, 1; -s: j: i F lactic acid mixture E |)) is treated with water in mln.) (Quantity, before distribution. / Sec.: Ostp into two layers. Ethyl lactate; 1 transition; 1t -.jjn this in the lower aqueous layer, giving; 1; :) lactic acid n ethyl (() ;. In the upper layer Ost: l) ts aifniijij; / :: oyunoy and oil acid. After the further refining and, if necessary, the fractional and P10th distillation is carried out for one purpose or another.

Lower SLL}, containing a dairy lac cpc: gota, undergoes evaporation into a vacuum:, e for ether11 ethers and iHiipTa are used. .In the case of (need, 1 ье lude ол lactic acid) ga1ot dopol 1pel; lomu rafnnprovyp that or HHiJM NU sUEpestuyutschtskh methods.

T REMEDIATED.

(allowance for obtaining a mixture of calcium 1o.:, {th oil, acetic acid m.lochyoy KCV L from sour HvOMOBuii water by (by the God of her limes with M milk, from tea and milk); ; ii (TK (; Boe milk D; 1, isti; K (g; 1PL J) Ii, 5 p, ate OTDS. NICHEL: Type: sludge, I,1,1; h) D :: iit usually obi-lb, a)