SU1220611A1 - Method of producing decolourized blood of slaughtered animals - Google Patents

Description

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The invention relates to the meat industry, more specifically to bleaching of blood.

The purpose of the invention is the acceleration of the process and its improvement.

The method is carried out as follows.

The collected blood of slaughter animals is stabilized by adding 25 ml of a 10% sodium tripolyphosphate solution to each liter of blood. The stabilized blood is heated before and for each liter of blood 60 ml of concentrated hydrogen peroxide solution (perhydrol) is injected, heated to 70 ° C and kept under stirring at this temperature for 30 minutes, then cooled or cooled to 48-25 C, carbon fiber catalyst is introduced in an amount of 2-10 g / l containing 1.6-2.8 wt.% Iron. The catalyst is maintained at 25–70 ° C in a mixture for 6–40 minutes until complete removal of peroxide, which is monitored every 2–5 minutes, a 1 ml sample is taken and the amount of peroxide in it is determined using a known method with KJ.

An iron carbon fiber catalyst is prepared by a known method. To do this, activated carbon cloth with a burnup of 40 wt.% Is boiled for 2-6 hours in concentrated nitric acid, after washing it is washed with water until neutral reaction of industrial water and ion exchange from 0.1 N is performed. FeCEj solution for 6 hours. After thorough washing with water and drying, the catalyst sample contains 1.6-258 wt.% of iron.

At lower temperatures, the duration of the process of removing unreacted hydrogen peroxide becomes more than 60 minutes (i.e., duration 13 does not decrease as compared to the prototype) due to the increase in blood viscosity and the low rate of the catalytic decomposition reaction of hydrogen peroxide. At the temperature of the blood coagulation occurs, in connection with which such blood becomes unsuitable for further processing (Example 12).

With the introduction of less than 2 g / l of iron-containing carbon fiber catalyst, the concentration of iron ions in it, on which

initiation of catalytic decomposition of peroxide is low, therefore the duration of the process of removal of unreacted peroxide exceeds 60 minutes (example 10). With the introduction of more than 10 g / l of iron-containing carbon fiber fiber, the duration of the process of removal of unreacted calcium acid decreases somewhat (example 11), however, the cost of the catalyst required for the treatment of 1 liter of blood is close to the cost of catalase used for this purpose in the Prototype 5.

With the introduction of a catalyst containing less than 1.6 wt.% Iron, the concentration of iron ions, on which catalytic decomposition is initiated.

2Q peroxide is insufficient to provide a satisfactory decomposition rate, and the processing time to remove unreacted peroxide exceeds 60 minutes

25 (example 9). With an increase in the iron content in the iron-containing carbon fiber catalyst more than 2.8 May,% the duration of the process of removal of unreacted peroxide

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does not change, which is explained by a slight increase in the activity of the catalyst in the heterogeneous catalytic process of decomposition of hydrogen peroxide with an increase in the iron content in it because the increase in the iron content in the catalyst is conjugated with a simultaneous decrease in its specific surface.

With a shorter duration than 6 minutes, the treatment of the provided blood with an iron-containing carbon fiber catalyst does not completely remove the peroxide.

The removal of unreacted hydrogen peroxide at the proposed processing temperatures, the amounts of catalyst introduced and the iron content in it takes no more than 40 minutes,

When bleeding the blood, no extraneous additives are added to it, since the catalyst does not release any compounds into the liquid in contact with it and, after the end of the process, is removed from the bleached blood.

Example 1 I OO ml of blood is stabilized by adding 2.5 ml of 10% sodium tripolyphosphate solution

and heated to 68 ° C. 6 ml of a concentrated solution of hydrogen peroxide are introduced into the heated blood and the mixture is kept under stirring

SRI 30 min at 70 C. Then, not cooled, 0.6 g (6 g / l) of iron-containing carbon fiber catalyst is introduced in the form of a piece of fabric with an iron content of 2.2 wt.% And at this temperature it neighbors for 6 minutes to complete removal of the peroxide, as evidenced by the reaction with KJ, after which the catalyst is removed from the mixture.

Example2. 100 ml of blood is stabilized and treated with peroxide as in example 1. After keeping at 70 ° C for 30 minutes, the mixture is cooled to 48 ° C and 0.6 g (bg / l) of iron-containing carbon fiber catalyst with an iron content of 2.2% by weight is added. and kept at this temperature for I2 minutes until the peroxide is completely removed, as evidenced by the reaction with KJ. After this, the catalyst is removed from the mixture.

And p m i me r 3. 100 ml of blood is stabilized and treated with peroxide as in example 1. After keeping at 70 ° C for 30 min, the mixture is cooled to 0.6 g (6 g / l) of iron-containing carbon fiber catalyst containing iron 2.2 wt.% In the form of a piece of fabric and hold at this temperature for 20 minutes until complete decomposition of the residual peroxide, as evidenced by the reaction with KJ, then the catalyst is removed from the mixture.

Example4. iOO ml of blood discolor as in example 3. The difference is that the iron-containing carbon fiber catalyst contains 1.6 wt.% of iron, which is kept in a mixture for 40 minutes.

Example 5. 100 ml of blood discolor as in example 3. The difference is that the iron-containing carbon fiber catalyst contains 2.8 wt.% Iron, which is contained in the mixture for 15 minutes.

Example 100 ml of blood is decolorized as in Example 3. The difference is that the iron-containing carbon fiber catalyst contains 2.8% by weight of iron, is injected in an amount of 0.2 g (2 g / l) and kept in the mixture for 30 minutes.

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Example. 100 ml of blood is discolored as in Example 3. The difference is that the iron-containing carbon fiber catalyst contains 2.8 wt.% Iron, it is introduced in an amount of 1.0 g (10 g / l) and kept in the mixture for 15 minutes.

Example 8. 100 ml of blood discolor as in example 3. Difference

jQ is that the iron-containing carbon fiber catalyst contains 3.0 wt.% iron, which is kept in a mixture for 15 minutes. Example 9. 100 ml of blood vol., Glow as in example 3. The difference is that the iron-containing carbon fiber catalyst contains 1.4 wt.% Iron, which is kept in a mixture for 60 minutes.

Example 10. 100 ml of blood discolor as in example 3. The difference is that iron-containing. The carbon fiber catalyst is added in an amount of 0.1 g (1 g / l).

25 and kept in the mixture for 70 minutes.

Example 11. 100 ml of blood are bleached as in Example 3. The difference is that the iron-containing carbon fiber catalyst is introduced in an amount of 1.1 g (P g / l) and held in the mixture for 13 minutes.

Example 2. 100 ml of blood is stabilized and treated with peroxide as in example I. After aging at 70 C for 30 minutes, the mixture is heated

.5 to 75 C. The blood coagulates and cannot be further processed.

Example 13. 100 ml of blood are stained and treated with peroxide as in the example. After drying at 70 ° C for 30 minutes, the mixture is cooled to 20 ° C, 0.2 g (2 g / l) of iron-containing carbon fiber catalyst with an iron content of 2.2 wt.% Is introduced and kept in the mixture

 70 minutes before complete removal of unreacted peroxide, as evidenced by the reaction with KJ, after which the catalyst is removed from the mixture. The characteristics of the blood bleaching method according to examples 1-13 are shown in the table.

The proposed invention will simplify the technology, since it does not require the creation of an environment with

5f strictly defined pH values; cooling the mixture from 70 to 40 after peroxide treatment is not required before reacting with the reagent.

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to remove excess peroxide, it is not necessary to maintain the temperature at a level (or a different level) during the operation to remove excess peroxide.

The invention will also accelerate the process, since after treatment with peroxide before removing its excess does not need to

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VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

1220611

cooling from 70 to, and the duration of the removal of excess peroxide is reduced to 6-40 minutes, the process is also cheaper due to the lower cost of the carbon fiber catalyst and the reduction of energy consumption to maintain the temperature while removing excess hydrogen peroxide.

Claims (2)

METHOD FOR PRODUCING BLOODED BLOOD OF SLAUGHTER ANIMALS, providing for its stabilization, blood treatment with hydrogen peroxide. when heated, followed by exposure and removal of unreacted hydrogen peroxide, characterized in that, in order to accelerate the process and reduce its cost, the removal of unreacted hydrogen peroxide is carried out by contacting the treated blood in the presence of carbon fiber of the catalyst with a content of 1.6-2.8 May. 7 iron for 6-40 min at 25-7 ° C, and the catalyst is taken 2-10 g / l. 1 122