DE128791C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

The extraction of the sugar contained in the molasses is carried out in the Strontian desugaring plants by this causes the diluted molasses with strontianhydrate to be boiled in the separation; the ratio from sugar to strontian is chosen as 1: 3 to 3.5. When it is boiled, it separates entire sugar as insoluble bistrontium saccharate, which drained on suction filters and separated from the brown non-sugar liquor using a vacuum. There the saccharate is still yellowish in color after suction filtering, i.e. still brown non-sugar liquor it is covered with hot 10% Strontian solution until the saccharate is of a uniform, pure white color; this is the case after covering three to four times. You can, however, expediently replace the first cover with the last used cover liquor use.

The bistrontium saccharate, which is only stable at the boiling point, is now placed in a box, poured over with water, in the cold store decomposed by lower temperatures, the crystallized strontianhydrate formed by the sugar solution is separated by centrifuges, so that on the one hand strontianhydrate, operationally Called "centrifugal salt," which again partly for divorce, partly is used to prepare the cover liquor, on the other hand a liquid containing strontian, Called "Strontian sugar mash", is created.

The disintegration of the bisaccharate in the cold store does not follow the formula:

(C ₁₂ H ₂₂ O _n -2 Sr O) +2 H ₂ O = 2 Sr (OH) ₂ + C ₁₂ H ₂₂ O _{n in} front of you, but one and a half basic saccharate is formed as an intermediate product:

3 (C ₁₂ H ₂₂ O _n 2SR O.) + 4 H ₂ O = (3 C ₁₂ H ₂₂ O ₁₁ · 2 Sr O) + 4 Sr (OH) _2, from which again Monostrontiumsaccharat, Strontianhydrat and sugar solution arise: ( 3 C ₁₂ H ₂₂ O _n . 2 Sr Ο} + H ₂ O = (C ₁₂ H ₂₂ O _n -SrO) + Sr (OH) ₂ + 2 C ₁₂ H ₂₂ O _n .

The monostrontium saccharate shows up on the decomposed bisaccharate mass Cauliflower-like masses are clumped together or are in the area that covers the decomposed saccharate Liquid suspended. In the separation of the sugar solution from the crystallized strontianhydrate the microscopic monosaccharate crystals pass through the sieves of the centrifugal salt centrifuge so that the "Strontian sugar mash" is not a clear liquid, but appears cloudy and opaque.

The composition of such a strontian sugar mash is approximately: alkalinity (based on Sr (OH) ₂ -f 8 H ₂ O) = ispCt., Sugar = 20 pCt., Brix = 33 ⁰ , per 100 sugar 29 pCt. Sr O.

This strontian sugar mash is pumped into the saturation pans with carbonic acid saturate until all the etzstrontium is converted into carbonate strontium by filter presses so that, on the one hand, saturated sugar juice and, on the other, Strontian sludge are produced.

The sugar juice goes for further processing after the refinery, while the strontian sludge With or without the addition of binders, it is shaped into bricks and broken down into strontium oxide and carbonic acid in an annealing furnace.

The strontian sludge contains about 90 to 92 pCt. SrCO ₃ and 8 to 10 pCt. Impurities such as strontium sulfate, strontium silicate, free silica, metal oxides, calcium sulfate and silicate. These impurities go with the Strontian sludge as useless ballast through the various stations of the Strontian desugarization, e.g. B. Saturation I, filter presses, Saturation II, filter presses, brickworks and kilns.

The aim of the new process is to remove the impurities and create a cleaner one To obtain strontian sugar mash, as well as purer strontian mud. The same is done as follows executed:

The strontian sugar mash is pumped into the pans A , in which the finished thin juice or. Strontian refinery juice is in the boil. The mutual proportions are immaterial, but that of 2 parts of mash to 1 part of juice appears to be the most favorable.

When the bisaccharate decomposes, the slimy substance goes through cooking Monosaccharate in solution, while the impurities of the strontian sugar mash excretion insoluble and excreted from the farm by filtration. The filtered Strontian solution goes to saturation, as happened earlier.

While the previously preserved Strontian sludge 8 to iopCt. Contains impurities, the strontian sludge obtained by this process has between 99.0 and 99.3 pCt. Sf-CO ₃ only 0.7 to 1.0 pCt. Impurities.

The strontian sludge obtained by this process burns more easily and with less Temperatures, give rise to the formation of slag to a lesser extent, and give purer juices.

The annealing mass produced from this sludge contains only 0.5 to 0.7 pCt. Impurities, so has on the extinguisher battery Going out of the same result in smoother and faster operation.

The new technical benefits resulting from the process consist in reduction of strontian loss and fuel, lower chamotte consumption, reduction of Costs, furnace operation and extinguishing battery, as well as an increase in the purity quotient of the Juices and thus in direct connection increase the yield of sugar and Stillage charcoal.

Claims (1)

Patent claim: Process for cleaning strontian sugar mash, characterized in that dafs by boiling those conveniently obtained from the strontium bisaccharate by decomposition Sugar mash with thin juice or sugar juice from the Strontian sugar refinery from be Liebiger concentration with the solution of strontium monosaccharate contained in the same Impurities are excreted insoluble before the strontian-containing solution reaches saturation. 1 sheet of drawings.