Walnut juice and preparation method thereof

[0028] The present invention also relates to the preparation method of the above walnut dew, and the preparation method comprises the following steps:

[0029] A, walnut kernel is carried out lye processing, peeling, pulping, obtains walnut kernel pulp, wherein the weight percent example of walnut kernel and lye solution is 1: (2~25), preferably 1: 5, standby;

[0030] b. Prepare a mixed solution of compound emulsified thickener, white granulated sugar, sodium carbonate and deionized water according to the weight percentage, dissolve the compound emulsified thickener, white granulated sugar and sodium carbonate in deionized water, and ensure that the compound is compounded The ratio of the weight of emulsifying thickener, white granulated sugar, and sodium carbonate to the weight of deionized water is controlled at 1: (1 to 6), preferably 1:2, for use;

[0031] c. The walnut kernel pulp in step a and the mixed solution in step b are prepared, and the walnut dew is obtained through homogenization, filling and sterilization.

[0032] In the described step a, the lye solution is one or a combination of sodium hydroxide and potassium hydroxide, the concentration of the lye solution is 0.5-1.0%, the temperature of the lye solution is 90-100°C, and the treatment time is 5-15min , preferably the concentration of the lye solution is 0.75%, the temperature of the lye solution is 100 ℃, and the treatment time is 10min; the peeling is sprayed with a low-pressure or high-pressure water gun; , colloid mill is preferred, and the weight percentage of walnut kernels and deionized water should be controlled at 1:(5-15), preferably 1:10, during pulping.

[0033] In the step b, the dissolving temperature is controlled at 75-90° C., the dissolving intensity stirring is controlled at 800-30000 rpm, and the dissolving time is controlled at 10-25 min.

[0034] In the step c, the blending time is controlled at 10-30min, preferably 1min, the blending intensity and stirring are controlled at 800-30000rpm; the homogenizing temperature is controlled at 70-90°C, the homogenizing pressure is controlled at 25-40Mpa, and the number of homogenizing times is controlled 1 to 3 times, preferably 2 times; the filling temperature is controlled at 80-95°C, preferably 85°C; the sterilization is performed by air or water, rotating or static, the sterilization temperature is controlled at 120-123°C, and the sterilization time is controlled at 20 ~30min, preferably still gas killing, the sterilization temperature is 121℃, and the sterilization time is 25min

[0036] Example 1 Preparation of walnut dew with low additive content according to the present invention

[0037] a. Add 40g of Hebei walnut kernels to 1000g of sodium hydroxide solution (concentration 1%, temperature 100°C) and boil for 5 minutes, spray and peel with a high-pressure water gun, add the peeled walnut kernels into 300g of water, and use a colloid mill to grind pulp, get walnut kernel pulp for use;

[0038] b, mix 1.5g monoglyceride, sodium caseinate, xanthan gum mixture, 70g white sugar, 0.35g sodium carbonate and 100g water, the dissolving temperature is 75 ℃, the dissolving strength is 800rpm, the dissolving time is 10min, and the solution is for later use ;

[0039]c. The walnut kernel pulp obtained in step a and the mixed solution obtained in step b are prepared, the preparation time is 10min, and the preparation intensity is stirred at 800rpm; the homogenization temperature is 70°C, the homogenization pressure is 35Mpa, and the homogenization times are 2 times; the filling temperature 80° C.; static sterilization with steam is adopted, the sterilization temperature is 121° C., and the sterilization time is 30 minutes, to obtain the walnut dew with low additive content according to the present invention.

[0040] Product information is shown in Table 1:

[0041] Table 1

[0042]

[0043] Example 2 Preparation of walnut dew with low additive content of the present invention

[0044] a. Add 35g of Shanxi walnut kernels to 500g of potassium hydroxide solution (concentration 0.5%, temperature 100°C), soak for 15 minutes, spray and peel with a high-pressure water gun, add the peeled walnut kernels into 200g of water, and use a colloid mill to grind pulp, get walnut kernel pulp for use;

[0045] b, 1.5g carrageenan, monoglyceride, sucrose ester mixture, 70g white granulated sugar, 0.35g sodium carbonate and 125g water are mixed, the dissolving temperature is 90 ℃, the dissolving strength is 30000rpm, and the dissolving time is 25min, and the solution is for subsequent use;

[0046] c. The walnut kernel pulp obtained in step a and the mixed solution obtained in step b are prepared, and the preparation time is 30 minutes, and the preparation intensity is stirred at 30,000 rpm; the homogenization temperature is 85°C, the homogenization pressure is 40Mpa, and the homogenization times are 2 times; the filling temperature 95° C.; using still water for sterilization, sterilization temperature of 123° C., and sterilization time of 30 minutes, to obtain the walnut dew with low additive content according to the present invention.

[0047] Product indicators are shown in Table 2:

[0048] Table 2

[0049]