Preparation method of antifreeze agent

Abstract

The invention belongs to the technical field of freezing, and relates to a preparation method of an antifreeze agent, which comprises the following steps: respectively weighing cane sugar, sorbitol and phosphate according to the mass ratio of (45-49): (45-49): (2-10), the phosphate being composed of sodium tripolyphosphate and sodium pyrophosphate according to the mass ratio of 1: 1; dissolving the weighed phosphate in purified water at the temperature of 50-60 DEG C according to the concentration of 10-20% to obtain a phosphate solution, and transferring the weighed sucrose and sorbitol into a skip car of a granulator; starting a granulator, enabling the cane sugar and the sorbitol to be in a fluidized state, conveying the phosphate solution into the granulator for atomization, mixing the phosphate solution with the cane sugar and the sorbitol which are in the fluidized state, and drying while spraying; and after the liquid spraying is finished, drying and screening the obtained granulated material to obtain the required antifreeze agent product. The anti-freezing agent is prepared by adopting a granulation method, so that the distribution uniformity of components in the product is effectively improved, and the use effect of the anti-freezing agent is remarkably enhanced.

Description

Technical Field

[0001] The invention belongs to the field of refrigeration technology, and particularly relates to a method for preparing an antifreeze agent. Background Art

[0002] Antifreeze is a substance that can lower the freezing point of a solution and is commonly used in the fields of food, medicine, and chemical industry. Among them, sucrose, sorbitol, and phosphate are commonly used antifreeze ingredients. Sorbitol is a polyol with good water solubility and antifreeze properties, while phosphate can form hydrogen bonds with water molecules, thereby enhancing the antifreeze effect.

[0003] In the existing antifreeze preparation technology, sucrose, sorbitol and phosphate are usually prepared by physical mixing. Specifically, sucrose, sorbitol, phosphate and other components are mixed in a certain proportion and prepared by a simple mechanical mixing method to obtain an antifreeze product. The advantages of this method are simple operation and low cost. However, due to the obvious differences in density and particle size between phosphate and sucrose and sorbitol, the mixed product is prone to stratification during storage and transportation, and it is difficult to ensure uniform distribution of the antifreeze product during use, thereby affecting the performance of the antifreeze. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a method for preparing an antifreeze agent, which adopts a granulation method to prepare the antifreeze agent, effectively improves the uniformity of component distribution in the product and significantly enhances the use effect of the antifreeze agent.

[0005] The present invention is achieved by providing a method for preparing an antifreeze agent, comprising the following steps: Step 1, weigh sucrose, sorbitol and phosphate respectively according to a mass ratio of 45-49:45-49:2-10, wherein the phosphate is composed of sodium tripolyphosphate and sodium pyrophosphate in a mass ratio of 1:1; dissolve the weighed phosphate in 50-60° C. purified water at a concentration of 10-20% to obtain a phosphate solution as a granulation wall material; transfer the weighed sucrose and sorbitol to a granulator trolley as a granulation core material; Step 2: Turn on the air supply system of the granulator to make the granulation core material in a fluidized state, and at the same time turn on the peristaltic pump to transport the phosphate solution into the granulator for atomization, and mix the phosphate solution with the fluidized sucrose and sorbitol, and dry while spraying; Step 3: After the spraying is completed, the obtained granulated material is dried and screened to obtain the desired antifreeze product.

[0006] Furthermore, in the step 2, the temperature of the granulator is controlled at 50-60° C., the liquid feeding rate of the phosphate solution is adjusted according to the amount of material in the material truck, and the total liquid feeding time is controlled at 2-3 hours.

[0007] Furthermore, in the step three, the granulated material is dried by first using 65°C hot air for 1-2 hours, and then using 25°C cold air for 0.5-1 hour; the dried granulated material is then screened with 10 mesh to remove lumps, thereby obtaining an antifreeze product.

[0008] Compared with the prior art, the preparation method of the antifreeze agent of the present invention has the following characteristics: 1) Improve product uniformity: The present invention adopts a granulation process to coat phosphate on the surface of sucrose and sorbitol, and closely combines the three components through physical and chemical effects, effectively avoiding the stratification phenomenon caused by density and particle size differences; 2) Enhanced antifreeze effect: Since the antifreeze product prepared by the present invention has better uniformity, it can better exert the antifreeze effect during use; 3) Improving product cost performance: Although the granulation process of the present invention may increase production costs to a certain extent, it can improve the cost performance of the product as a whole because it improves the use effect of the antifreeze agent and product quality. DETAILED DESCRIPTION

[0009] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0010] A preferred embodiment of the method for preparing the antifreeze agent of the present invention comprises the following steps: Step 1. Weigh sucrose, sorbitol and phosphate in a mass ratio of 45-49:45-49:2-10, wherein the phosphate is composed of sodium tripolyphosphate and sodium pyrophosphate in a mass ratio of 1:1; dissolve the weighed phosphate in 50-60°C purified water in a concentration of 10-20% to obtain a phosphate solution as a granulation wall material; transfer the weighed sucrose and sorbitol to a granulator cart as a granulation core material.

[0011] Step 2: Turn on the air supply system of the granulator to put the granulation core material in a fluidized state, and at the same time turn on the peristaltic pump to transport the phosphate solution to the granulator for atomization. The phosphate solution is mixed with the fluidized sucrose and sorbitol, and the spraying is performed while drying to achieve phosphate coating on the surface of the sucrose and sorbitol.

[0012] Step 3: After the spraying is completed, the obtained granulated material is dried and screened to obtain the desired antifreeze product.

[0013] Specifically, in the step 2, the temperature of the granulator is controlled at 50-60° C., the feeding rate of the phosphate solution is adjusted according to the amount of material in the material truck, and the total feeding time is controlled at 2-3 hours.

[0014] Specifically, in the step three, the granulated material is dried by first using 65° C. hot air for 1-2 hours, and then using 25° C. cold air for 0.5-1 hour; the dried granulated material is then screened through 10 meshes to remove lumps, thereby obtaining an antifreeze product.

[0015] The preparation method of the antifreeze agent of the present invention is described below by means of specific examples and comparative examples. Example 1

[0016] The first embodiment of the method for preparing the antifreeze agent of the present invention comprises the following steps: Step 11. According to the mass ratio of sucrose: sorbitol: phosphate = 47:47:6, weigh 1880g of sucrose, 1880g of sorbitol, and 240g of phosphate, where the phosphate consists of 120g of sodium tripolyphosphate and 120g of sodium pyrophosphate, and dissolve the weighed sodium pyrophosphate and sodium tripolyphosphate in 50°C purified water in a mass concentration of 20% to obtain a phosphate solution. The sucrose and sorbitol are directly transferred to the feed cart of the granulator.

[0017] Step 12, turn on the air supply system of the granulator to make the granulation core material in a fluidized state, control the material temperature in the granulator to 60°C, and at the same time turn on the peristaltic pump to transport the phosphate solution to the granulator. The phosphate solution is atomized by the nozzle and mixed with the fluidized material, spraying and drying at the same time, and adjust the liquid inlet rate of the phosphate solution to ensure that the spraying is completed in 2 hours.

[0018] Step 13: After the spraying is completed, the obtained granulated material is first dried with hot air at 65°C for 1 hour, and then dried with cold air at 25°C for 0.5 hour, and then sieved through 10 mesh to remove lumps to obtain the desired antifreeze product. Example 2

[0019] The second embodiment of the method for preparing the antifreeze agent of the present invention comprises the following steps: Step 21. According to the mass ratio of sucrose: sorbitol: phosphate = 45:45:10, weigh 1800g sucrose, 1800g sorbitol, and 400g phosphate, where the phosphate consists of 200g sodium tripolyphosphate and 200g sodium pyrophosphate, and dissolve the weighed sodium pyrophosphate and sodium tripolyphosphate in 55°C purified water in a mass concentration of 15% to obtain a phosphate solution. The sucrose and sorbitol are directly transferred to the feed cart of the granulator.

[0020] Step 22, turn on the air supply system of the granulator to put the granulation core material in a fluidized state, control the material temperature in the granulator to 50°C, and at the same time turn on the peristaltic pump to transport the phosphate solution to the granulator. The phosphate solution is atomized by the nozzle and mixed with the fluidized material. The phosphate solution is sprayed and dried at the same time. The liquid inlet rate of the phosphate solution is adjusted to ensure that the spraying is completed within 3 hours.

[0021] Step 23, after the spraying is completed, the obtained granulated material is first dried with hot air at 65°C for 1 hour, and then dried with cold air at 25°C for 0.5 hour, and then sieved through 10 mesh to remove lumps to obtain the desired antifreeze product. Example 3

[0022] The first embodiment of the method for preparing the antifreeze agent of the present invention comprises the following steps: Step 31. According to the mass ratio of sucrose: sorbitol: phosphate = 49:49:2, weigh 1960g of sucrose, 1960g of sorbitol, and 80g of phosphate, wherein the phosphate consists of 40g of sodium tripolyphosphate and 40g of sodium pyrophosphate, and dissolve the weighed sodium pyrophosphate and sodium tripolyphosphate in 60°C purified water in a mass concentration of 10% to obtain a phosphate solution. The sucrose and sorbitol are directly transferred to the feed cart of the granulator.

[0023] Step 32, turn on the air supply system of the granulator to put the granulation core material in a fluidized state, control the material temperature in the granulator to 60°C, and at the same time turn on the peristaltic pump to transport the phosphate solution to the granulator. The phosphate solution is atomized by the nozzle and mixed with the fluidized material, spraying and drying at the same time, and adjust the liquid inlet rate of the phosphate solution to ensure that the spraying is completed in 2 hours.

[0024] Step 33, after the spraying is completed, the obtained granulated material is first dried with hot air at 65°C for 2 hours, and then dried with cold air at 25°C for 1 hour, and then sieved through 10 mesh to remove lumps to obtain the desired antifreeze product.

[0025] Comparative Example 1 The method for preparing an antifreeze agent in this comparative example comprises the following steps: weighing 1880 g of sucrose, 1880 g of sorbitol, and 240 g of phosphate according to a mass ratio of sucrose: sorbitol: phosphate = 47:47:6, wherein the phosphate consists of 120 g of sodium tripolyphosphate and 120 g of sodium pyrophosphate, and all the weighed materials are transferred into a mixer for mixing to obtain an antifreeze agent product prepared by a physical mixing method.

[0026] Comparative Example 2 The method for preparing an antifreeze agent in this comparative example comprises the following steps: weighing 1800g of sucrose, 1800g of sorbitol, and 400g of phosphate according to a mass ratio of sucrose: sorbitol: phosphate = 45:45:10, wherein the phosphate consists of 200g of sodium tripolyphosphate and 200g of sodium pyrophosphate, and all the weighed materials are transferred into a mixer for mixing to obtain an antifreeze agent product prepared by a physical mixing method.

[0027] The effect of the antifreeze product prepared in this example was evaluated using the following method.

[0028] 1. Evaluation method 1: Surimi storage test The test method of the surimi storage test is as follows: weigh 500g of surimi, add 40g of antifreeze product according to 8% of its weight, stir evenly to obtain surimi treated with antifreeze; put the treated surimi in a sterilized ziplock bag, freeze it at -40℃ for 48h, and then store it in a -18℃ cold storage, and track the protein thiol content and Ca content in the surimi after two weeks. 2+ -ATPase activity, record the measured values.

[0029] The antifreeze agents prepared in Example 1, Example 2, Example 3, Comparative Example 1 and Comparative Example 2 were selected to perform surimi storage tests according to Evaluation Method 1, and the surimi storage test results shown in Table 1 were obtained.

[0030] Table 1 Protein thiol content and Ca in surimi after two weeks of antifreeze in each embodiment and comparative example 2+ -ATPase activity results

[0031] 2. Evaluation method 2 - storage aging test The test method of the storage aging test is: the prepared antifreeze sample is packaged and stored in the sample retention room for three months, and then samples are taken from the upper part ①, middle part ② and lower part ③ of the packaging bag respectively, the proportion of each component in the samples at different positions is analyzed, and the measured values ​​are recorded.

[0032] The antifreeze agents prepared in Example 1, Example 2, Example 3, Comparative Example 1 and Comparative Example 2 were selected and subjected to storage aging tests according to Evaluation Method 2, and the storage aging test results shown in Table 2 below were obtained.

[0033] Table 2 Comparison of sampling results of antifreeze products at different locations in various embodiments and comparative examples

[0034] From the results in Table 1, it can be concluded that the antifreeze samples prepared in each embodiment have better uniformity and play a more excellent effect in the antifreeze performance of fish paste. From the results in Table 2, it can be concluded that the proportion of each component in the antifreeze products prepared in each embodiment is close to the expected proportion, and the difference in sample components at different positions is very small; while the proportion of each component in the antifreeze products prepared in each comparative example fluctuates greatly, and the difference in sample components at different positions is also large. Therefore, from the above results, it can be seen that the antifreeze products prepared by the method of the present invention have better component uniformity and stronger antifreeze effect.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preparing an antifreeze agent, characterized in that: The following steps are involved: Step 1, weigh sucrose, sorbitol and phosphate respectively according to a mass ratio of 45-49:45-49:2-10, wherein the phosphate is composed of sodium tripolyphosphate and sodium pyrophosphate in a mass ratio of 1:1; dissolve the weighed phosphate in 50-60° C. purified water at a concentration of 10-20% to obtain a phosphate solution as a granulation wall material; transfer the weighed sucrose and sorbitol to a granulator trolley as a granulation core material; Step 2: Turn on the air supply system of the granulator to make the granulation core material in a fluidized state, and at the same time turn on the peristaltic pump to transport the phosphate solution into the granulator for atomization, and mix the phosphate solution with the fluidized sucrose and sorbitol, and dry while spraying; Step 3: After the spraying is completed, the obtained granulated material is dried and screened to obtain the desired antifreeze product.

2. The method for preparing an antifreeze agent according to claim 1, characterized in that: In the step 2, the temperature of the granulator is controlled at 50-60° C., the feeding rate of the phosphate solution is adjusted according to the amount of material in the material truck, and the total feeding time is controlled at 2-3 hours.

3. The method for preparing an antifreeze agent according to claim 1, characterized in that: In the step 3, the granulated material is dried by first using 65° C. hot air for 1-2 hours and then using 25° C. cold air for 0.5-1 hour; the dried granulated material is then screened with 10 meshes to remove lumps, thereby obtaining an antifreeze product.

4. The method for preparing an antifreeze agent according to claim 1, characterized in that: The following steps are involved: Step 11, according to the mass ratio of sucrose: sorbitol: phosphate = 47:47:6, weigh 1880g sucrose, 1880g sorbitol, and 240g phosphate, the phosphate consists of 120g sodium tripolyphosphate and 120g sodium pyrophosphate, and dissolve the weighed sodium pyrophosphate and sodium tripolyphosphate in 50°C purified water in a mass concentration of 20% to obtain a phosphate solution, and directly transfer the sucrose and sorbitol to the feed car of the granulator; Step 12, start the air supply system of the granulator to make the granulation core material in a fluidized state, control the material temperature in the granulator to 60° C., and start the peristaltic pump to transport the phosphate solution into the granulator. The phosphate solution is atomized by the nozzle and mixed with the fluidized material. The phosphate solution is sprayed and dried at the same time. The liquid inlet rate of the phosphate solution is adjusted to ensure that the spraying is completed within 2 hours; Step 13: After the spraying is completed, the obtained granulated material is first dried with hot air at 65°C for 1 hour, and then dried with cold air at 25°C for 0.5 hour, and then sieved through 10 mesh to remove lumps to obtain the desired antifreeze product.

5. The method for preparing an antifreeze agent according to claim 1, characterized in that: The following steps are involved: Step 21, according to the mass ratio of sucrose: sorbitol: phosphate = 45:45:10, weigh 1800g sucrose, 1800g sorbitol, 400g phosphate, the phosphate consists of 200g sodium tripolyphosphate and 200g sodium pyrophosphate, and dissolve the weighed sodium pyrophosphate and sodium tripolyphosphate in 55°C purified water in a mass concentration of 15% to obtain a phosphate solution, and directly transfer the sucrose and sorbitol to the feed car of the granulator; Step 22, start the air supply system of the granulator to make the granulation core material in a fluidized state, control the material temperature in the granulator to 50° C., and start the peristaltic pump to transport the phosphate solution into the granulator. The phosphate solution is atomized by the nozzle and mixed with the fluidized material. The phosphate solution is sprayed and dried at the same time. The liquid inlet rate of the phosphate solution is adjusted to ensure that the spraying is completed within 3 hours; Step 23, after the spraying is completed, the obtained granulated material is first dried with hot air at 65°C for 1 hour, and then dried with cold air at 25°C for 0.5 hour, and then sieved through 10 mesh to remove lumps to obtain the desired antifreeze product.

6. The method for preparing an antifreeze agent according to claim 1, characterized in that: The following steps are involved: Step 31, according to the mass ratio of sucrose: sorbitol: phosphate = 49:49:2, weigh 1960g sucrose, 1960g sorbitol, and 80g phosphate, the phosphate is composed of 40g sodium tripolyphosphate and 40g sodium pyrophosphate, and the weighed sodium pyrophosphate and sodium tripolyphosphate are dissolved in 60°C purified water in a mass concentration of 10% to obtain a phosphate solution, and the sucrose and sorbitol are directly transferred to the feed car of the granulator; Step 32, start the air supply system of the granulator to make the granulation core material in a fluidized state, control the material temperature in the granulator to 60° C., and start the peristaltic pump to transport the phosphate solution into the granulator. The phosphate solution is atomized by the nozzle and mixed with the fluidized material. The phosphate solution is sprayed and dried at the same time. The liquid feeding rate of the phosphate solution is adjusted to ensure that the spraying is completed within 2 hours. Step 33, after the spraying is completed, the obtained granulated material is first dried with hot air at 65°C for 2 hours, and then dried with cold air at 25°C for 1 hour, and then sieved through 10 mesh to remove lumps to obtain the desired antifreeze product.

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