RU2589789C1 - Method of producing brown sugar syrup - Google Patents

Abstract

FIELD: food industry.

SUBSTANCE: invention relates to food industry. According to proposed method of producing brown sugar syrup, brown sugar is mixed with II saturation juice in ratio 1:0.20-1:0.30 to obtain fillmass. Anolyte and catholyte are prepared by dissolving in a II saturation juice of sugar production salts NaCl and Na₂SO₃, taken in an amount of 0.02-0.05 % of weight of juice, and processing obtained solution of salts in a diaphragm cell. Fillmass is then dissolved in an anolyte and catholyte is added to obtained solution until a syrup is obtained with dry substances weight fraction equal to 60-65 % and pH 8-8.5. Syrup is then is heated to 75-80 °C and filtered.

EFFECT: method ensures reduction of consumption of anolyte, solves problem of recycling catholyte and higher effect of decolouration of syrup, which improves quality of end product.

1 cl, 1 tbl, 2 ex

Description

The invention relates to the sugar industry, and in particular to methods for producing klerovka yellow sugar beet sugar production.

The closest in technical essence and the achieved effect is a method for producing yellow sugar clearing, which involves dissolving sugar in anolyte with a pH of 6.7-7.5 obtained by treating an aqueous solution of sodium chloride in the anode chamber of a diaphragm electrolyzer, heating and filtering (US Pat. RU 2267541 Method for the purification of sugar. Publish. 10.01.2006. Bull. No. 01).

The disadvantages of this method are the high consumption of anolyte for dissolving sugar; the need for waste disposal - catholyte; low bleaching effect at the clerking stage.

The technical task of the invention is to reduce the consumption of anolyte, to solve the problem of utilization of catholyte and to increase the effect of discoloration of clearing, which will improve the quality of the finished product - white sugar.

To solve the technical problem of the invention, a method for producing yellow sugar chelating is proposed, characterized in that yellow sugar is mixed with saturation juice II in a ratio of 1: 0.20-1: 0.30 to obtain a mixture (massecuite) of crystals and intercrystal liquid, anolyte is prepared by dissolving in the juice of the second saturation of the sugar plant salts of NaCl and Na ₂ SO ₃ taken in an amount of 0.02-0.05% by weight of the juice, and treating the resulting salt solution in a diaphragm electrolyzer, then the massecuite is dissolved in anolyte and then added to the resulting solution catholyte to radiation clerking with a mass fraction of solids (SV) of 60-65% and a pH of 8-8.5, then the curing is heated to 75-80 ° C and filtered.

The technical result of the invention is to reduce the consumption of anolyte, to solve the problem of utilization of catholyte and to increase the effect of discoloration of clerk.

The method is as follows.

Anolyte and catholyte are prepared. To do this, NaCl and Na ₂ SO ₃ salts, taken in an amount of 0.02-0.05% by weight of the juice, are dissolved in the juice of the II saturation of the sugar factory. The resulting solution is treated in the anode and cathode chambers of the diaphragm electrolyzer. Anolyte pH 6.2-7.0. The pH of the catholyte is 8.2-9.0.

Yellow sugar is dissolved in three stages. First, yellow sugar is mixed with saturation juice II in a ratio of 1: 0.20-1: 0.30 to obtain a mixture (massecuite) of crystals and intercrystal liquid, then this massecuite is dissolved in anolyte and then catholyte is added to the resulting solution to obtain curing with CB 60-65% and pH 8.0-8.5, at which sucrose is the most heat-resistant. Klerovka is heated to 75-80 ° C and filtered.

This approach reduces the consumption of anolyte. In a known method, sugar is immediately dissolved in the anolyte. To obtain clergy with a mass fraction of solids of 60-65%, 33-39 kg of anolyte per 100 kg of cure is necessary. In the proposed method, 10-16 kg of anolyte - per 100 kg of clearing.

In addition, the problem of utilization of catholyte is solved - they bring the mass fraction of dry solids of clearing to a predetermined value (60-65%) and adjust the pH to 8.0-8.5. The consumption of catholyte is 11-17 kg per 100 kg of clearing.

The total consumption of anolyte and catholyte is 21-33 kg per 100 kg of clearing, which is also less than the consumption of anolyte for clerking in the known method.

The anolyte thus obtained contains a complex complex of oxide products: O ₃ , HOCl, H ₂ O ₂ , Cl ^- , -ClO, ClO ₂ , Cl ₂ O, S ₂ O ₃ ^2- , S ₂ O ₆ ^2- , SO ₃ ^2- and others. Being present together in the solution, the listed components give the anolyte high bleaching properties. When sugar is dissolved with anolyte, a number of chemical reactions take place, in particular, the chromophore group of melanoid compounds is oxidized, leading to a clearer clearing. The destruction of complexes of melanoid compounds with sucrose is also observed, which helps to reduce the formation of new coloring matter. When yellow sugar is mixed with juice of II saturation, most of the coloring matter goes into solution, since it is located on the surface of the crystals. The concentration and viscosity of the intercrystal fluid at the beginning of dissolution is still low and the subsequent bleaching with anolyte is most effective.

In sugar production, yellow sugars are subjected to cloning. The purpose of clerking is to dissolve sugar crystals to obtain a solution (clearing), which is then sent to crystallization together with the syrup from the evaporator. Since most of the coloring matter gets into white sugar with klerovka, removing the coloring matter from it helps to improve the quality of the finished product.

When using anolyte as an adhesive fluid, discoloration of colored compounds occurs. The catholyte is used to adjust the set value of the mass fraction of solids and pH clearing.

A method for producing yellow sugar clearing is illustrated by the following examples.

Example 1. Anolyte and catholyte are prepared. To do this, NaCl and Na ₂ SO ₃ salts are dissolved in the juice of the II saturation of the sugar factory. The NaCl consumption is 0.03% by weight of the juice, the Na ₂ SO ₃ consumption is the same. The resulting solution is treated in the anode and cathode chambers of the diaphragm electrolyzer to obtain anolyte and catholyte. Anolyte pH is pH 7.0. The pH of the catholyte is 8.8. To carry out cloning, 200 g of yellow sugar from a sugar factory (color 1656 optical density units) are first mixed with 40 g of saturation juice II to obtain a mixture (massecuite) of sugar crystals and intercrystal liquid. Then this massecuite is dissolved in anolyte and then catholyte is added to the resulting solution to a 65% CB and a pH of 8.2. Then the solution is heated to 80 ° C and filtered. It turns out bleached clevering - color 1360 units. opt. density. The bleaching effect of 17.9%. Anolyte consumption 46.0 g (13.9 kg per 100 kg of curing). The total consumption of anolyte and catholyte is 27.7 kg per 100 kg of clearing.

Example 2 (prototype). Anolyte is prepared. For this, NaCl is dissolved in water to a mass fraction of solids in a solution of 0.08%. The resulting solution is treated in the anode chamber of the diaphragm electrolyzer to a pH of 7.0 anolyte. To carry out the cloning, 200 g of yellow sugar (color 1656 units of optical density) is dissolved in the prepared anolyte until a trick is obtained with CB = 65.0%. The clinker is heated to 80 ° C and filtered. Indicators of curing: CB = 65.0%, pH = 7.2, color 1464 units. opt. density. The bleaching effect is 11.6%. Anolyte consumption of 101.5 g (33.7 kg per 100 kg of clearing).

The analysis data are presented in the table, which gives a comparison of the effectiveness of the prototype and the proposed method for obtaining klerovka yellow sugar.

Table

As can be seen from the table, the proposed method allows to increase the effect of discoloration by 6.6-7.8 units. and reduce anolyte consumption by 2.4-3.4 times in comparison with the known method. In addition, the problem of utilization of catholyte is solved.

The output of the consumption of salts and the ratio of yellow sugar - juice of II saturation beyond the limits indicated in the claims does not lead to a significant increase in the effect of discoloration.

The proposed method allows to reduce the consumption of anolyte, solves the problem of utilization of catholyte and increases the effect of bleaching klerovka, which makes it possible to improve the quality of the finished product - white sugar.

Claims (1)

A method for obtaining yellow sugar sugar, characterized in that yellow sugar is mixed with saturation juice II in a ratio of 1: 0.20 - 1: 0.30 to obtain massecuite, anolyte and catholyte are prepared by dissolving sugar production of NaCl and Na salts in sugar saturation II ₂ SO ₃ , taken in an amount of 0.02-0.05% by weight of juice, and processing the resulting salt solution in a diaphragm electrolyzer, then the massecuite is dissolved in anolyte and then catholyte is added to the resulting solution to obtain a trickle with a mass fraction of solids 60- 65% and pH 8-8.5, then heat clearing t to 75-80 ° C and filtered.