A leavening agent and its preparation method and application

Abstract

The present invention relates to the field of food additives, and in particular to a leavening agent and its preparation method and application. The leavening agent includes an acidic salt and an alkaline salt, and a filler added as needed, wherein the alkaline salt is embedded into microcapsule A by a wall material as a core material, or the acidic salt is embedded into microcapsule B by a wall material as a core material, or the acidic salt and the alkaline salt are independently embedded into microcapsule A and microcapsule B by a wall material, respectively, and the wall material includes vegetable oil, and the weight ratio of the core material to the wall material is 10:0.1-1.5. The present invention reduces the contact of the acidic salt and the alkaline salt through embedding treatment, thereby improving the stability of the leavening agent and delaying the gas production rate of the leavening agent during the process of adding water and kneading dough, reducing gas loss, and improving the effect of the leavening agent; at the same time, the weight ratio of the core material to the wall material during the embedding treatment is 10:0.1-1.5, overcoming the yellow spot problem caused by the excessive thickness of the wall material and improving the quality of baked goods.

Description

Technical Field

[0001] The present invention relates to the field of food additives, and in particular to a leavening agent, a preparation method thereof and an application thereof. Background Art

[0002] A compound leavening agent is an additive that can make food quickly become soft and crispy. Its addition can form a porous structure in the product, thereby improving the taste of the product and inducing consumers' appetite.

[0003] There are two conditions for leavening agents to produce gas: water and heat. Upon contact with water, the acidic and alkaline components of the leavening agent begin to react and produce gas, and heating exacerbates this gas production. During the dough mixing stage, the leavening agent generates gas upon contact with water, but this gas is often unused, with the loss accounting for 20-40% of the total gas volume, significantly reducing its effectiveness. The addition of acidic ingredients (such as fruit juice) to the product can also intensify the reaction with baking soda, compromising the effectiveness of the leavening agent.

[0004] In industrial production, the initial processing time is long, and premature gas production by the leavening agent is undesirable, as this can affect the product's operability and ultimately its quality. Furthermore, due to the inherent properties of leavening agents, compound leavening agents are unstable and prone to reaction, affecting their stability and effectiveness. Therefore, a new solution is needed to address these issues. Summary of the Invention

[0005] The technical problems to be solved by the present invention are: the prior art leavening agents have poor stability and produce gas too quickly, and the prior art leavening agents have a single effect and cannot be compounded with liquid additives with improving effects.

[0006] In view of the shortcomings of the prior art, one of the objects of the present invention is to provide a leavening agent, a second object of the present invention is to provide a method for preparing the above-mentioned leavening agent, and a third object of the present invention is to provide an application of the above-mentioned leavening agent in baked foods.

[0007] The technical solution adopted by the present invention to solve the technical problem is:

[0008] The present invention provides a leavening agent, which comprises an acidic salt and an alkaline salt, and a filler added as needed. The alkaline salt is used as a core material and is embedded in a wall material to form a microcapsule A, or the acidic salt is used as a core material and is embedded in a wall material to form a microcapsule B, or the acidic salt and the alkaline salt are independently embedded in a wall material to form microcapsule A and microcapsule B, respectively. The wall material comprises vegetable oil, and the weight ratio of the core material to the wall material is 10:0.1-1.5.

[0009] Preferably, based on the sum of the mass of the alkaline salt, the acidic salt and the filler being 100%, the alkaline salt accounts for 20-45%, the acidic salt accounts for 15-50%, and the filler accounts for 10-45%.

[0010] Preferably, the alkaline salt includes at least one of sodium bicarbonate, potassium bicarbonate, sodium carbonate and potassium carbonate.

[0011] Preferably, the acidic salt includes at least one of disodium dihydrogen pyrophosphate, calcium dihydrogen phosphate, sodium dihydrogen phosphate, citric acid, malic acid and fumaric acid.

[0012] Preferably, the filler comprises at least one of corn starch, wheat starch, potato starch, tapioca starch and calcium carbonate.

[0013] Preferably, the vegetable oil is one or more of palm oil, rapeseed oil, peanut oil, olive oil, rapeseed oil, corn oil, sesame oil, cottonseed oil, rice oil, sunflower oil, linseed oil, safflower oil, soybean oil and coconut oil, preferably palm oil. Preferably, the palm oil is one or more of 10° palm oil, 24° palm oil, 33° palm oil, 41° palm oil and 52° palm oil.

[0014] Preferably, the wall material further comprises an emulsifier. Preferably, the emulsifier comprises at least one of mono- and diglycerol fatty acid esters, soybean lecithin and diacetyl tartaric acid mono- and diglycerol esters, preferably mono- and diglycerol fatty acid esters. Further preferably, the mass ratio of the vegetable oil to the emulsifier is 1:10-10:1, preferably 1-10:1.

[0015] Preferably, the leavening agent is prepared by the following steps:

[0016] (1) Melting the wall material;

[0017] (2) placing alkaline salt or acidic salt as the core material into the fluidized bed, turning on the cavity heating, and adjusting the air inlet volume;

[0018] (3) spraying the wall material in step (1) into a fluidized bed to obtain microcapsule A or microcapsule B;

[0019] (4) Microcapsule A and an acidic salt, or microcapsule B and an alkaline salt, or microcapsule A and microcapsule B, and a filler as needed are mixed to obtain a leavening agent.

[0020] The present invention also provides a method for preparing the above-mentioned leavening agent, comprising the following steps:

[0021] (1) Melting the wall material;

[0022] (2) placing alkaline salt or acidic salt as the core material into the fluidized bed, turning on the cavity heating, and adjusting the air inlet volume;

[0023] (3) spraying the wall material in step (1) into a fluidized bed to obtain microcapsule A or microcapsule B;

[0024] (4) Microcapsule A and an acidic salt, or microcapsule B and an alkaline salt, or microcapsule A and microcapsule B, and a filler as needed are mixed to obtain a leavening agent.

[0025] Preferably, in the above preparation method, the melting temperature in step (1) is 55-80°C.

[0026] Preferably, in the above preparation method, the air intake volume in step (2) is 50-200m 3 / h, preferably, the material temperature is 15-40°C.

[0027] Preferably, in the above preparation method, the injection speed in step (3) is 4-16 mL / min.

[0028] The present invention also provides a use of the leavening agent or the leavening agent prepared by the preparation method in baked foods.

[0029] The beneficial effects of the present invention are as follows: the leavening agent of the present invention uses vegetable oil as a wall material and a fluidized bed encapsulation process to encapsulate alkaline salts or acidic salts, thereby reducing the contact between acidic salts and alkaline salts, thereby improving the stability of the leavening agent and delaying the gas production rate of the leavening agent during the process of adding water and kneading dough, reducing gas loss, and improving the effect of the leavening agent; at the same time, the weight ratio of the core material to the wall material during the encapsulation process is 10:0.1-1.5, which overcomes the yellow spot problem caused by the excessively thick wall material and improves the quality of baked foods. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A steamed bun with yellow spots. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the embodiments.

[0032] The "microcapsule A" mentioned in the present invention refers to a microcapsule in which the alkaline salt is used as the core material and is embedded in the wall material, also called the "first microcapsule" or an embedded alkaline salt, such as embedded sodium bicarbonate, embedded potassium bicarbonate, embedded sodium carbonate, embedded potassium carbonate, and embedded potassium bicarbonate; the "microcapsule B" refers to a microcapsule in which the acidic salt is used as the core material and is embedded in the wall material, also called the "second microcapsule" or an embedded acidic salt, such as embedded calcium dihydrogen phosphate, embedded disodium dihydrogen pyrophosphate, embedded citric acid, and embedded fumaric acid.

[0033] The present invention provides a leavening agent, which comprises an acidic salt and an alkaline salt, and a filler added as needed. The alkaline salt is used as a core material and is embedded in a wall material to form a microcapsule A, or the acidic salt is used as a core material and is embedded in a wall material to form a microcapsule B, or the acidic salt and the alkaline salt are independently embedded in a wall material to form microcapsule A and microcapsule B, respectively. The wall material comprises vegetable oil, and the weight ratio of the core material to the wall material is 10:0.1-1.5. The invention uses alkaline salt and acidic salt as main raw materials, wherein the alkaline salt is used as the core material and is embedded in the wall material to obtain microcapsule A, or the acidic salt is used as the core material and is embedded in the wall material to obtain microcapsule B, or the acidic salt and the alkaline salt are independently embedded in the wall material to form microcapsule A and microcapsule B respectively. This can reduce the contact between the acidic salt and the alkaline salt, thereby improving the stability of the leavening agent and delaying the gas production rate of the leavening agent during the process of adding water and kneading dough, reducing gas loss, and improving the effect of the leavening agent. At the same time, the weight ratio of the core material to the wall material during the embedding process is 10:0.1-1.5, which can overcome the yellow spot problem caused by the excessively thick wall material and improve the quality of baked goods.

[0034] In a preferred embodiment of the present invention, based on the sum of the mass of the alkaline salt, the acidic salt and the filler being 100%, the alkaline salt accounts for 20-45%, the acidic salt accounts for 15-50% and the filler accounts for 10-45%.

[0035] In a preferred embodiment of the present invention, the alkaline salt includes at least one of sodium bicarbonate, potassium bicarbonate, sodium carbonate and potassium carbonate.

[0036] In a preferred embodiment of the present invention, the acidic salt includes at least one of disodium dihydrogen pyrophosphate, calcium dihydrogen phosphate, sodium dihydrogen phosphate, citric acid, malic acid and fumaric acid.

[0037] In a preferred embodiment of the present invention, the filler comprises at least one of corn starch, wheat starch, potato starch, tapioca starch and calcium carbonate.

[0038] In a preferred embodiment of the present invention, the vegetable oil comprises any conventional vegetable oil, which may be unhydrogenated, partially hydrogenated, or fully hydrogenated, preferably one or more of palm oil, rapeseed oil, peanut oil, olive oil, rapeseed oil, corn oil, sesame oil, cottonseed oil, rice oil, sunflower oil, linseed oil, safflower oil, soybean oil, and coconut oil. Palm oil is preferred, and further preferably, the palm oil is one or more of 10° palm oil, 24° palm oil, 33° palm oil, 41° palm oil, and 52° palm oil. Palm oil has different melting points, and the melting point can be adjusted as needed. The higher the melting point, the stronger the wall material. Conventional vegetable oil esters have lower melting points, and to obtain high-melting-point oils, they must be processed through processes such as hydrogenation. Non-hydrogenated palm oil is healthier. Under the same conditions, compared to conventional vegetable oils as wall materials, palm oil is stronger, so less wall material can be used, and the risk of yellow spots is lower. Palm oil is also more stable, less prone to oxidation and rancidity, and has a wider range of applications.

[0039] In a preferred embodiment of the present invention, the wall material further includes an emulsifier. Preferably, the emulsifier includes at least one of mono- and diglycerol fatty acid esters, soybean lecithin and diacetyl tartaric acid mono- and diglycerides, preferably mono- and diglycerol fatty acid esters. Further preferably, the mass ratio of the vegetable oil to the emulsifier is 1:10-10:1, preferably 1-10:1.

[0040] In a preferred embodiment of the present invention, the leavening agent is prepared by the following steps:

[0041] (1) Melting the wall material;

[0042] (2) placing alkaline salt or acidic salt as the core material into the fluidized bed, turning on the cavity heating, and adjusting the air inlet volume;

[0043] (3) spraying the wall material in step (1) into a fluidized bed to obtain microcapsule A or microcapsule B;

[0044] (4) Microcapsule A and an acidic salt, or microcapsule B and an alkaline salt, or microcapsule A and microcapsule B, and a filler as needed are mixed to obtain a leavening agent.

[0045] The present invention also provides a method for preparing the above-mentioned leavening agent, comprising the following steps:

[0046] (1) Melting the wall material;

[0047] (2) placing alkaline salt or acidic salt as the core material into the fluidized bed, turning on the cavity heating, and adjusting the air inlet volume;

[0048] (3) spraying the wall material in step (1) into a fluidized bed to obtain microcapsule A or microcapsule B;

[0049] (4) Microcapsule A and an acidic salt, or microcapsule B and an alkaline salt, or microcapsule A and microcapsule B, and a filler as needed are mixed to obtain a leavening agent.

[0050] In a preferred embodiment of the present invention, in the above preparation method, the melting temperature in step (1) is 55-80°C.

[0051] In a preferred embodiment of the present invention, in the above preparation method, the air inlet volume in step (2) is 50-200m 3 / h, the material temperature is 15-40°C.

[0052] In a preferred embodiment of the present invention, in the above preparation method, the injection speed in step (3) is 4-16 mL / min.

[0053] The present invention also provides a use of the leavening agent or the leavening agent prepared by the preparation method in baked foods.

[0054] The sources and manufacturers of the components of the leavening agent of the present invention are shown in Table 1.

[0055] Table 1 Sources of raw materials and equipment used in the present invention

[0056]

[0057]

[0058] Example 1

[0059] Preparation of embedded sodium bicarbonate:

[0060] Weigh 14.5g 10° palm oil, 58g 52° palm oil and 7.5g mono- and diglycerol fatty acid esters into a beaker, heat to 60°C, melt and stir evenly to obtain the wall material for standby use. Weigh 1000g sodium bicarbonate and add it into the fluidized bed, turn on the cavity heating, and adjust the air inlet volume to 100m 3 / h, the air inlet temperature is 50℃, the material temperature is controlled at 40℃, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 8mL / min to obtain embedded sodium bicarbonate.

[0061] Preparation of embedded calcium dihydrogen phosphate:

[0062] Weigh 14.5g 10° palm oil, 58g 52° palm oil and 7.5g mono- and diglycerol fatty acid esters into a beaker, heat to 60°C, melt and stir evenly to obtain the wall material for standby use. Weigh 1000g calcium dihydrogen phosphate and add it into the fluidized bed, adjust the air volume to 100m 3 / h, open the cavity to heat the material, the air inlet temperature is 50°C, the fluidization temperature is controlled at 40°C, open the spray gun, and spray the melted wall material at a spraying speed of 8mL / min to obtain embedded calcium dihydrogen phosphate.

[0063] 350 g of embedded sodium bicarbonate, 470 g of embedded calcium dihydrogen phosphate and 180 g of corn starch were weighed, and then the components were mixed to prepare the leavening agent of the present invention.

[0064] Example 2

[0065] Preparation of embedded potassium bicarbonate:

[0066] Weigh 36g of 10° palm oil, 36g of 52° palm oil and 48g of mono- and diglycerol fatty acid esters into a beaker, heat to 65°C, melt and stir evenly to obtain the wall material for later use. Weigh 1000g of potassium bicarbonate and add it into the fluidized bed, turn on the cavity heating, and adjust the air inlet volume to 120m 3 / h, the air inlet temperature is 40°C, the fluidization temperature is controlled at 30°C, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 9.6mL / min to obtain embedded potassium bicarbonate.

[0067] 320 g of embedded potassium bicarbonate, 300 g of disodium dihydrogen pyrophosphate, 90 g of calcium dihydrogen phosphate and 290 g of potato starch were weighed and mixed to prepare the leavening agent of the present invention.

[0068] Example 3

[0069] Preparation of embedded citric acid:

[0070] Weigh 15g of 10° palm oil and 135g of 52° palm oil into a beaker, heat to 70°C, melt and stir evenly to obtain the wall material for later use. Weigh 1000g of citric acid and add it to the fluidized bed, turn on the cavity heating, and adjust the air inlet volume to 120m 3 / h, the air inlet temperature is 40℃, the material temperature is controlled at 30℃, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 12mL / min to obtain embedded citric acid.

[0071] 300 g of sodium bicarbonate, 450 g of embedded citric acid and 250 g of tapioca starch were weighed and then mixed to prepare the leavening agent of the present invention.

[0072] Example 4

[0073] Preparation of embedded sodium carbonate:

[0074] Weigh 9g of 24° palm oil and 1g of 41° palm oil into a beaker, heat to 55°C, melt and stir evenly to obtain the wall material for later use. Weigh 1000g of sodium carbonate into the fluidized bed, turn on the cavity heating, and adjust the air inlet volume to 200m 3 / h, the air inlet temperature is 35°C, the material temperature is controlled at 30°C, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 4mL / min to obtain embedded sodium carbonate.

[0075] Preparation of embedded disodium dihydrogen pyrophosphate:

[0076] Weigh 9g of 24° palm oil and 1g of 41° palm oil into a beaker, heat to 55°C, melt and stir evenly to obtain the wall material for later use. Weigh 1000g of disodium dihydrogen pyrophosphate and add it into the fluidized bed, turn on the cavity heating, and adjust the air inlet volume to 200m 3 / h, the air inlet temperature is 35°C, the material temperature is controlled at 30°C, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 4mL / min to obtain embedded disodium dihydrogen pyrophosphate.

[0077] 390 g of embedded sodium carbonate, 230 g of embedded disodium dihydrogen pyrophosphate and 390 g of calcium carbonate were weighed and then mixed to prepare the leavening agent of the present invention.

[0078] Example 5

[0079] Preparation of embedded potassium carbonate:

[0080] Weigh 5g 33° palm oil, 45g 41° palm oil and 50g diacetyl tartaric acid mono- and diglycerides and add them into a beaker. Heat to 80°C, melt and stir evenly to obtain the wall material for later use. Weigh 1000g potassium carbonate and add it into the fluidized bed. Turn on the cavity heating and adjust the air inlet volume to 50m 3 / h, the air inlet temperature is 45°C, the material temperature is controlled at 35°C, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 16mL / min to obtain embedded sodium carbonate.

[0081] Preparation of embedded fumaric acid:

[0082] Weigh 25g of 10° palm oil, 25g of 52° palm oil and 50g of diacetyl tartaric acid mono- and diglycerides and add them into a beaker. Heat to 80°C, melt and stir evenly to obtain the wall material for later use. Weigh 1000g of fumaric acid and add it into the fluidized bed. Turn on the cavity heating and adjust the air inlet volume to 50m 3 / h, the air inlet temperature is 45°C, the material temperature is controlled at 35°C, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 16mL / min to obtain embedded fumaric acid.

[0083] 420 g of embedded potassium carbonate, 180 g of embedded fumaric acid and 400 g of corn starch were weighed and then mixed to prepare the leavening agent of the present invention.

[0084] Example 6

[0085] Preparation of embedded potassium bicarbonate:

[0086] Weigh 72g hydrogenated coconut oil and 48g mono- and diglycerol fatty acid esters into a beaker, heat to 65℃, melt and stir evenly to obtain wall material for standby use. Weigh 1000g potassium bicarbonate and add it into the fluidized bed, turn on the cavity heating, and adjust the air inlet volume to 120m 3 / h, the air inlet temperature is 40°C, the material temperature is controlled at 30°C, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 9.6mL / min to obtain embedded potassium bicarbonate.

[0087] 320 g of embedded potassium bicarbonate, 300 g of disodium dihydrogen pyrophosphate, 90 g of calcium dihydrogen phosphate and 290 g of corn starch were weighed and then mixed to prepare the leavening agent of the present invention.

[0088] Comparative Example 1

[0089] Preparation of embedded potassium bicarbonate:

[0090] Weigh 144g hydrogenated coconut oil and 96g mono- and diglycerol fatty acid esters into a beaker, heat to 65°C, melt and stir evenly to obtain the wall material for later use. Weigh 1000g potassium bicarbonate and add it to the fluidized bed, turn on the cavity heating, and adjust the air inlet volume to 120m 3 / h, the air inlet temperature is 40°C, the material temperature is controlled at 30°C, the spray gun is turned on, and the melted wall material is sprayed in at a spraying speed of 9.6mL / min to obtain embedded potassium bicarbonate.

[0091] 354 g of embedded potassium bicarbonate, 300 g of disodium dihydrogen pyrophosphate, 90 g of calcium dihydrogen phosphate and 290 g of potato starch were weighed and then mixed to prepare the leavening agent of Comparative Example 1.

[0092] Comparative Example 2

[0093] 286 g of potassium bicarbonate, 300 g of disodium dihydrogen pyrophosphate, 90 g of calcium dihydrogen phosphate and 290 g of potato starch were weighed and mixed to prepare a leavening agent of Comparative Example 2.

[0094] Comparative Example 3

[0095] Preparation of embedded sodium bicarbonate:

[0096] The method comprises a core material and a wall material, wherein the core material is sodium bicarbonate and the wall material is beta-cyclodextrin, and the weight ratio of the core material to the wall material is 1:8. First, cyclodextrin is dissolved in water, and the weight ratio of cyclodextrin to water is 1:5, and the mixture is stirred evenly to form an embedding solution. Sodium bicarbonate is added to the embedding solution, and the mixture is stirred evenly at 33° C. and 8000 r / min to obtain a microcapsule solution. The microcapsule solution is spray-condensed and granulated through a centrifugal spray tower to obtain the embedded sodium bicarbonate.

[0097] Preparation of embedded calcium dihydrogen phosphate:

[0098] The embedded calcium dihydrogen phosphate comprises a core material and a wall material, wherein the core material is calcium dihydrogen phosphate and the wall material is beta-cyclodextrin, and the weight ratio of the core material to the wall material is 1:6. First, cyclodextrin is dissolved in water, and the weight ratio of cyclodextrin to water is 1:5, and the mixture is stirred evenly to form an embedding solution; sodium bicarbonate is added to the embedding solution, and the mixture is stirred evenly at 33°C and 8000 rpm to obtain a microcapsule solution; the microcapsule solution is spray-condensed and granulated through a centrifugal spray tower to obtain the embedded calcium dihydrogen phosphate.

[0099] 500 g of embedded sodium bicarbonate and 500 g of embedded calcium dihydrogen phosphate were weighed to prepare the leavening agent of Comparative Example 3.

[0100] Comparative Example 4

[0101] 36 g of hydrogenated coconut oil and 4 g of mono- and diglycerol fatty acid esters were weighed and added to a beaker. The temperature was raised to 80°C, heated to melt, and stirred evenly to obtain a wall material for later use. 15 g of citric acid and 15 g of lactic acid were weighed and added to the wall material. High-speed shear emulsification was performed under heat preservation conditions to obtain an embedding mixture. The embedding mixture was spread onto a stainless steel flat plate, placed in a -40°C rapid freezing position, until the central temperature of the material dropped below zero, and then pulverized to obtain the embedded citric acid and lactic acid.

[0102] 70 g of the embedded citric acid and lactic acid and 30 g of sodium bicarbonate were weighed, and then the components were mixed to prepare the leavening agent of Comparative Example 4.

[0103] Application Experiment Example 1

[0104] The leavening agents prepared in Examples 1-6 and Comparative Examples 1-4 were used to make steamed buns according to the following method and subjected to a yellow spot evaluation test.

[0105] 1. Premix: Add 1000g pastry flour, 200g white sugar powder and 15g leavening agent into the dough bowl and mix at level 1 for 1 minute.

[0106] 2. Stirring: Add 10g Angel highly active dry yeast to 420g water, then add to the dough bowl, and stir at level 1 for 5 minutes until the dough forms a ball.

[0107] 3. Press the dough: Adjust the distance between the rollers of the pasta press to 1.5 cm and press the dough. Fold the dough in half after each pressing and then press again. Repeat this process 15 times.

[0108] 4. Shaping: Roll the pressed dough into long strips, then cut into 5cm long steamed bun pieces (about 50g) with a knife and place them in the steaming tray;

[0109] 5. Proofing: Place the tray of steamed buns in a proofing box and let them rise for 1 hour at 35°C and 75% relative humidity.

[0110] 6. Steaming: Place the proofed steamed buns into the steamer and steam at 100℃ for 15 minutes.

[0111] Place the steamed buns in a bright place and observe whether there are yellow spots on the surface of the buns. Figure 1 The yellow spots in the circle, regardless of their depth, were considered as yellow spots, and the number of yellow spots was counted to calculate the yellow spot rate. The results are shown in Table 2.

[0112] Table 2 Macula results of Examples 1-6 and Comparative Examples 1-4

[0113] Whether there are yellow spots Mantou yellow spot rate Example 1 no 0％ Example 2 no 0％ Example 3 no 0％ Example 4 no 0％ Example 5 no 0％ Example 6 no 0％ Comparative Example 1 have 6.67％ Comparative Example 2 none 0％ Comparative Example 3 have 100％ Comparative Example 4 have 40％

[0114] As shown in Table 2, steamed buns made with the leavening agents prepared in Examples 1-6 of the present invention did not produce yellow spots. Compared with Example 2, the steamed buns made with the leavening agent prepared in Comparative Example 1, which had a core material to wall material ratio of 10:2.4, had a yellow spot rate of 6.67%. Comparative Example 3, which used β-cyclodextrin as the wall material, had a yellow spot rate of 100%. Comparative Example 4, which had a core material to wall material ratio of 3:4 and employed a high-speed shearing process, had a yellow spot rate of 40%.

[0115] Application Experiment Example 2

[0116] Steamed buns were prepared using the leavening agents prepared in Examples 1-6 and Comparative Examples 1-4 according to the following method, and the specific volumes of the steamed buns were measured using a Perter BVM6600 volume meter. The results are shown in Table 3.

[0117] Weigh 1000g of wheat flour, 10g of leavening agent, 20g of sugar and 8g of Angel high-active dry yeast, add to 500g of water and stir to make dough, divide into 80g of dough each, roll into balls and shape into steamed buns, ferment at 35℃ and 80% relative humidity for 40min, take out and steam for 15min, and measure its specific volume after cooling.

[0118] Table 3 Specific volume determination results of Examples 1-6 and Comparative Examples 1-4

[0119]

[0120]

[0121] As shown in Table 3, the steamed buns made with the leavening agents prepared in Examples 1-6 of the present invention have a specific volume of 2.58-2.85 cm 3 / g, which are all higher than those of Comparative Examples 1-4; compared with Example 2, the specific volume of steamed buns made in Example 6 using hydrogenated coconut oil as the leavening agent is smaller than that of Example 2; compared with Example 2, the specific volume of steamed buns made in Comparative Example 1 is significantly smaller than that of Example 2, as the ratio of core material to wall material is 10:2.4. Comparative Example 2 does not use embedding treatment, and the specific volume of steamed buns made therefrom is even smaller.

[0122] In summary, by using vegetable oil as the wall material and the fluidized bed encapsulation process to encapsulate alkaline salts or acidic salts, the contact between acidic salts and alkaline salts is reduced, thereby improving the stability of the leavening agent and delaying the gas production rate of the leavening agent during the process of adding water and kneading dough, reducing gas loss, and improving the effect of the leavening agent; at the same time, the weight ratio of the core material to the wall material during the encapsulation treatment is 10:0.1-1.5, which overcomes the yellow spot problem caused by the excessive thickness of the wall material and improves the quality of baked goods.

[0123] The above description is merely a preferred embodiment of the present invention and does not limit the present invention in any form. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A leavening agent, characterized in that It includes an acidic salt and an alkaline salt, and a filler, wherein the alkaline salt is used as a core material and is embedded in a wall material to form microcapsule A, or the acidic salt is used as a core material and is embedded in a wall material to form microcapsule B, or the acidic salt and the alkaline salt are independently embedded in a wall material to form microcapsule A and microcapsule B, respectively. The wall material includes vegetable oil, and the weight ratio of the core material to the wall material is 10:0.1-1.

5. Wherein, the leavening agent is prepared by the following steps: (1) Melting the wall material; (2) Place the alkaline salt or acidic salt as the core material into the fluidized bed, turn on the cavity heating, and adjust the air inlet volume; (3) spraying the wall material in step (1) into the fluidized bed to obtain microcapsule A or microcapsule B; (4) Microcapsule A and acidic salt, or microcapsule B and alkaline salt, or microcapsule A and microcapsule B, and filler are mixed to obtain a leavening agent. Wherein, based on the sum of the mass of the alkaline salt, the acidic salt and the filler being 100%, the alkaline salt is 20-45%, the acidic salt is 15-50%, and the filler is 10-45%. The alkaline salt includes at least one of sodium bicarbonate, potassium bicarbonate, sodium carbonate and potassium carbonate; the acidic salt includes at least one of disodium dihydrogen pyrophosphate, calcium dihydrogen phosphate and sodium dihydrogen phosphate.

2. The leavening agent according to claim 1, characterized in that The acidic salt may be replaced by at least one of citric acid, malic acid and fumaric acid.

3. The leavening agent according to claim 1, characterized in that The filler comprises at least one of corn starch, wheat starch, potato starch, tapioca starch and calcium carbonate.

4. The leavening agent according to claim 1, characterized in that The vegetable oil is one or more of palm oil, peanut oil, olive oil, rapeseed oil, corn oil, sesame oil, cottonseed oil, rice oil, sunflower oil, linseed oil, safflower oil, soybean oil and coconut oil.

5. The leavening agent according to claim 1, characterized in that The vegetable oil is palm oil, and the palm oil is one or more of 10° palm oil, 24° palm oil, 33° palm oil, 41° palm oil and 52° palm oil.

6. The leavening agent according to claim 1, characterized in that The wall material further comprises an emulsifier.

7. The leavening agent according to claim 6, characterized in that The emulsifier includes at least one of mono- and diglycerol fatty acid esters, soybean lecithin and diacetyl tartaric acid mono- and diglycerides.

8. The leavening agent according to claim 6, characterized in that The emulsifier is mono- and di-glycerol fatty acid ester.

9. The leavening agent according to any one of claims 6 to 8, characterized in that The mass ratio of the vegetable oil to the emulsifier is 1:10-10:

1.

10. The leavening agent according to any one of claims 6 to 8, characterized in that The mass ratio of the vegetable oil to the emulsifier is 1-10:

1.

11. The method for preparing a leavening agent according to any one of claims 1 to 10, characterized in that: The process includes the following steps: (1) Melting the wall material; (2) Place the alkaline salt or acidic salt as the core material into the fluidized bed, turn on the cavity heating, and adjust the air inlet volume; (3) spraying the wall material in step (1) into the fluidized bed to obtain microcapsule A or microcapsule B; (4) Microcapsule A and an acidic salt, or microcapsule B and an alkaline salt, or microcapsule A and microcapsule B, and a filler are mixed to obtain a leavening agent.

12. The preparation method according to claim 11, characterized in that: The melting temperature in step (1) is 55-80°C.

13. The preparation method according to claim 11, characterized in that: The air intake volume in step (2) is 50-200m 3 / h.

14. The preparation method according to any one of claims 11 to 13, characterized in that: In step (2), the material temperature is maintained at 15-40°C under the condition of cavity heating.

15. The preparation method according to any one of claims 11 to 13, characterized in that: The injection rate in step (3) is 4-16 mL / min.

16. The preparation method according to claim 15, characterized in that: The injection rate in step (3) is 4-16 mL / min.

17. Use of the leavening agent according to any one of claims 1 to 10 or the leavening agent prepared by the preparation method according to any one of claims 11 to 16 in baked foods.

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