Raw material dropping device capable of improving the yield of peach aldehyde

Abstract

The present invention provides a raw material dropping device capable of improving the yield of peach aldehyde, belonging to the technical field of peach aldehyde production. A reverse conical liquid separation guiding cone is arranged at the outlet of the raw material dropping pipe, and a plurality of liquid guiding grooves are opened on the liquid separation guiding cone. The lower end of the raw material dropping pipe extends into the interior of the peach aldehyde reactor. During the process of dropping the reaction raw materials into the peach aldehyde reactor through the raw material dropping pipe, the reaction raw materials are first split by the liquid separation guiding cone, and then the reaction raw materials flow along the outer wall of the liquid separation guiding cone and into the peach aldehyde reactor from the lower edge of the liquid separation guiding cone along the liquid guiding grooves. The reaction raw materials can enter the peach aldehyde reactor with smaller liquid droplets and a wider distribution range, thereby improving the heat and mass transfer efficiency, reducing the polymerization risk of the reaction raw materials, and further increasing the yield of peach aldehyde. Experiments show that by using the above raw material dropping device capable of improving the yield of peach aldehyde to drop the reaction raw materials into the peach aldehyde reactor, compared with the traditional straight pipe dropping, the yield of peach aldehyde is increased by 3% - 5%.

Description

Technical Field

[0001] The present invention belongs to the technical field of peach aldehyde production, and particularly relates to a raw material dropping device capable of improving the yield of peach aldehyde. Background Art

[0002] Peach aldehyde, also known as γ-undecalactone, is a butyrolactone with a heptyl side chain. It is a colorless to light yellow viscous liquid with a strong peach aroma. Its density is 0.941 - 0.944 g / mL, boiling point is 173 - 174 °C (1.06 kPa, 8 mmHg), refractive index is 1.4490 - 1.4540, specific gravity is 0.924 - 0.945, and acid value is less than 0.2. Peach aldehyde is soluble in ethanol and benzyl alcohol and insoluble in water. It naturally exists in cream, osmanthus, peach, apricot, passion fruit, and hydrolyzed soy protein. As one of the most commonly used lactone fragrances, peach aldehyde is recognized as GRAS (Generally Recognized as Safe) by FEMA (Flavor and Extract Manufacturers Association of the United States), with FEMA number 3091, and is approved for consumption by the FDA (Food and Drug Administration of the United States). The European Council has included peach aldehyde in the list of artificial edible fragrances that can be used in food without harming human health. Peach aldehyde is commonly used in daily fragrances such as osmanthus, jasmine, gardenia, lily of the valley, neroli, white rose, lilac, and acacia, and is also an excellent raw material for formulating food flavors such as peach, melon, plum, apricot, cherry, and osmanthus. It can be widely applied to daily chemical fragrances and food flavors.

[0003] The production process of peach aldehyde mainly includes direct synthesis by intramolecular reaction, isomerization and lactonization of unsaturated acids, and synthesis of γ-lactone by free radical addition reaction of alcohols and unsaturated acids. Among them, the synthesis of γ-lactone by free radical addition reaction of alcohols and unsaturated acids has become a relatively ideal industrial production method due to its easily available raw materials, high product yield, mild process conditions, and low cost. For example, the Chinese invention patent with the patent number 201110299195.0 discloses an extraction method for synthesizing peach aldehyde, which includes the following steps: putting octanol, acrylic acid, and peroxide into a container, stirring to fully mix; adding octanol and a co-catalyst into a reactor; dropping octanol, acrylic acid, and peroxide into the reactor at a predetermined temperature, stirring and reacting; distilling and separating octanol; vacuum fractionating to extract peach aldehyde. However, according to the description in its specification, the peach aldehyde yield of the above extraction method for synthesizing peach aldehyde is 72.7% - 73.5%, and the peach aldehyde yield is relatively low. The possible reason is that the reaction raw materials polymerize, resulting in an increase in by-products. Summary of the Invention

[0004] In view of this, the present invention provides a raw material dropping device capable of improving the yield of peach aldehyde to solve the technical problem in the prior art that the yield of peach aldehyde is relatively low due to the polymerization of reaction raw materials.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A raw material dropping device capable of increasing the yield of peach aldehyde, comprising a raw material dropping pipe and a liquid separation guiding cone arranged at the outlet of the raw material dropping pipe. The liquid separation guiding cone is in an inverted conical shape, and the vertex is arranged at the lower end of the outlet of the raw material dropping pipe; a plurality of liquid guiding grooves are formed on the liquid separation guiding cone.

[0007] Preferably, the cone angle of the liquid separation guiding cone is 60°-120°.

[0008] Preferably, the diameter of the raw material dropping pipe is 5 mm-40 mm.

[0009] Preferably, the length of the raw material dropping pipe is 1 m-10 m.

[0010] Preferably, a cooling protection plate is sleeved outside the liquid separation guiding cone, and a liquid guiding cavity is formed between the cooling protection plate and the outer wall of the liquid separation guiding cone.

[0011] Preferably, the raw material dropping device capable of increasing the yield of peach aldehyde further comprises a raw material cooling pipe. The raw material cooling pipe is sleeved outside the raw material dropping pipe, a protective gas flow cavity is formed between the inner wall of the raw material cooling pipe and the outer wall of the raw material dropping pipe, and a protective gas inlet pipe is connected to the raw material cooling pipe.

[0012] Preferably, a liquid blocking plate is arranged at the lower edge of the liquid separation guiding cone, and a plurality of raw material dropping holes are formed on the liquid blocking plate.

[0013] Preferably, the liquid separation guiding cone is hollow to form a cooling cavity, and a cooling medium inlet pipe and a cooling medium outlet pipe are connected to the cooling cavity.

[0014] As can be seen from the above technical solutions, the present invention provides a raw material dropping device capable of increasing the yield of peach aldehyde, and its beneficial effects are as follows: An inverted conical liquid separation guiding cone is arranged at the outlet of the raw material dropping pipe, and a plurality of liquid guiding grooves are formed on the liquid separation guiding cone. During the process of dropping a mixture of octanol, acrylic acid and peroxide (hereinafter referred to as "reaction raw materials") into the peach aldehyde reactor, the lower end of the raw material dropping pipe extends into the interior of the peach aldehyde reactor. During the process of dropping the reaction raw materials into the peach aldehyde reactor through the raw material dropping pipe, the reaction raw materials are first split by the liquid separation guiding cone, and then the reaction raw materials flow along the outer wall of the liquid separation guiding cone and along the liquid guiding grooves from the lower edge of the liquid separation guiding cone into the peach aldehyde reactor. The reaction raw materials can enter the peach aldehyde reactor with smaller liquid droplets and a wider distribution range, thereby improving the heat and mass transfer efficiency, reducing the polymerization risk of the reaction raw materials, and further increasing the yield of peach aldehyde. Experiments show that by using the above raw material dropping device capable of increasing the yield of peach aldehyde to drop the reaction raw materials into the peach aldehyde reactor, compared with the traditional straight pipe dropping, the yield of peach aldehyde is increased by 3%-5%. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic structural diagram of a raw material dropping device capable of increasing the yield of peach aldehyde in an embodiment.

[0016] Figure 2 FIG. 2 is a schematic structural diagram of a raw material dropping device capable of increasing the yield of peach aldehyde in another embodiment.

[0017] Figure 3 FIG. 3 is Figure 2 a schematic sectional view taken along line A-A shown in FIG. 4.

[0018] Figure 4 FIG. 4 is Figure 3 a partially enlarged view of part A shown in FIG. 5.

[0019] Figure 5 FIG. 5 is a schematic sectional view of a raw material dropping device capable of increasing the yield of peach aldehyde in another embodiment.

[0020] In the figures: a raw material dropping device 10 capable of increasing the yield of peach aldehyde, a raw material dropping pipe 100, a liquid separation guiding cone 200, a liquid guiding groove 210, a liquid blocking plate 220, a raw material dropping hole 221, a cooling protection plate 300, a liquid guiding cavity 400, a raw material cooling pipe 500, a protective gas feeding pipe 510, a protective gas circulation cavity 600, a cooling cavity 700, a cooling medium feeding pipe 710, and a cooling medium discharging pipe 720. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions and technical effects of the present invention will be further elaborated in detail below in conjunction with the drawings of the present invention.

[0022] Please refer to Figure 1 , in a specific embodiment, a raw material dropping device 10 capable of increasing the yield of peach aldehyde is used to drop a mixture of octanol, acrylic acid and peroxide (hereinafter referred to as "reaction raw materials") into a peach aldehyde reactor during the production of peach aldehyde. The raw material dropping device 10 capable of increasing the yield of peach aldehyde includes a raw material dropping pipe 100 and a liquid separation guiding cone 200 provided at the outlet of the raw material dropping pipe 100. The liquid separation guiding cone 200 is in an inverted conical shape, and the vertex is provided at the lower end of the outlet of the raw material dropping pipe 100; a plurality of liquid guiding grooves 210 are formed on the liquid separation guiding cone 200.

[0023] For example, the cone angle of the liquid separation guiding cone 200 is 60° - 120°, the diameter of the raw material dropping pipe 100 is 5 mm - 40 mm, and the length is 1 m - 10 m.

[0024] During the process of dripping reaction raw materials into the peach aldehyde reactor, the lower end of the raw material dripping pipe 100 extends into the interior of the peach aldehyde reactor. During the process of dripping the reaction raw materials into the peach aldehyde reactor through the raw material dripping pipe 100, the reaction raw materials are first shunted by the liquid separation guiding cone 200, and then the reaction raw materials flow along the outer wall of the liquid separation guiding cone 200 and along the liquid guiding groove 210 from the lower edge of the liquid separation guiding cone 200 into the peach aldehyde reactor. During this process, the reaction raw materials can enter the peach aldehyde reactor with smaller liquid droplets and a wider distribution range, thereby improving the efficiency of heat and mass transfer, reducing the polymerization risk of the reaction raw materials, and further increasing the yield of peach aldehyde. Experiments show that by using the above-mentioned raw material dripping device 10 capable of increasing the yield of peach aldehyde to drip the reaction raw materials into the peach aldehyde reactor, compared with the traditional straight pipe dripping, the yield of peach aldehyde is increased by 3%-5%.

[0025] Please refer to Figures 2 to 4 In a preferred embodiment, to further reduce the polymerization risk of the reaction raw materials and increase the yield of peach aldehyde, a cooling guard plate 300 is provided outside the liquid separation guiding cone 200, and a liquid guiding cavity 400 is formed between the cooling guard plate 300 and the outer wall of the liquid separation guiding cone 200. For example, if the cooling guard plate 300 and the liquid separation guiding cone 200 are made of heat-insulating materials, a relatively low-temperature environment is formed in the liquid guiding cavity 400, thereby preventing the polymerization of acrylic acid and octanol in the reaction raw materials at high temperatures.

[0026] Furthermore, the raw material dripping device 10 capable of increasing the yield of peach aldehyde further includes a raw material cooling pipe 500. The raw material cooling pipe 500 is sleeved outside the raw material dripping pipe 100, and a protective gas flow cavity 600 is formed between the inner wall of the raw material cooling pipe 500 and the outer wall of the raw material dripping pipe 100. A protective gas inlet pipe 510 is connected to the raw material cooling pipe 500. During the process of dripping the reaction raw materials into the peach aldehyde reactor, the lower end of the raw material dripping pipe 100 extends into the interior of the peach aldehyde reactor, and the reaction raw materials are dripped into the peach aldehyde reactor through the raw material dripping pipe 100. At the same time, a protective gas, such as nitrogen, is introduced into the raw material cooling pipe 500 to cool the raw material dripping pipe 100. The protective gas diffuses around along the outer surface of the cooling guard plate 300, avoiding the direct action of the protective gas on the reaction liquid surface. On the one hand, introducing protective nitrogen into the peach aldehyde reactor improves the safety performance of the reaction system. On the other hand, using the protective gas to cool the raw material dripping pipe 100 prevents the temperature of the raw material dripping pipe 100 from being too high, resulting in the polymerization of the reaction raw materials, thereby increasing the yield of peach aldehyde.

[0027] Further, a liquid baffle 220 is provided at the lower edge of the liquid separation guiding cone 200. A plurality of raw material dropping holes 221 are formed in the liquid baffle 220, and the raw material dropping holes 221 are aligned with the liquid guiding groove 210, so that the reaction raw materials flow out from the side surface of the liquid separation guiding cone 200. At this time, under the disturbance of the protective gas, the reaction raw materials form small droplets at the edge of the liquid separation guiding cone 200 and drop into the peach aldehyde reactor in the state of smaller droplets, so that the raw material feeding is fully dispersed, the uniformity of reaction mass transfer and heat transfer is improved, the polymerization tendency of the reaction raw materials is reduced, and the yield of peach aldehyde is further effectively increased. Experiments show that, compared with the traditional straight pipe dropping, by using the above raw material dropping device 10 capable of increasing the yield of peach aldehyde to drop the reaction raw materials into the peach aldehyde reactor, the yield of peach aldehyde is increased by 5%-7%.

[0028] Please refer to Figure 5 In another preferred embodiment, the liquid separation guiding cone 100 is hollow to form a cooling cavity 700. The cooling cavity 700 is connected with a cooling medium inlet pipe 710 and a cooling medium outlet pipe 720. A refrigerating medium, such as cooling water, is introduced into the cooling cavity 700 to reduce the surface temperature of the liquid separation guiding cone 100, so that the reaction raw materials always maintain a lower temperature in the raw material dropping device 10 capable of increasing the yield of peach aldehyde. For example, the temperature of the reaction raw materials in the raw material dropping device 10 capable of increasing the yield of peach aldehyde is maintained below 100 °C, so as to effectively slow down the polymerization tendency of the reaction raw materials and increase the yield of peach aldehyde. Experiments show that, compared with the traditional straight pipe dropping, by using the above raw material dropping device 10 capable of increasing the yield of peach aldehyde to drop the reaction raw materials into the peach aldehyde reactor, the yield of peach aldehyde is increased by 10%-13%.

[0029] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Those of ordinary skill in the art can understand the whole or part of the processes of the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A raw material dropping device capable of increasing the yield of peach aldehyde, characterized in that, It includes a raw material dropping pipe and a liquid separation guiding cone arranged at the outlet of the raw material dropping pipe. The liquid separation guiding cone is in an inverted conical shape, and its vertex is arranged at the lower end of the outlet of the raw material dropping pipe. A number of liquid guiding grooves are formed on the liquid separation guiding cone. The raw material dropping device capable of improving the yield of peach aldehyde further includes a raw material cooling pipe sleeved outside the raw material dropping pipe. A protective gas flow cavity is formed between the inner wall of the raw material cooling pipe and the outer wall of the raw material dropping pipe. A cooling protection plate is arranged outside the liquid separation guiding cone, and a liquid guiding cavity is formed between the cooling protection plate and the outer wall of the liquid separation guiding cone. A protective gas inlet pipe is connected to the raw material cooling pipe to introduce protective gas into the raw material cooling pipe to cool down the raw material dropping pipe. The protective gas diffuses around along the outer surface of the cooling protection plate. A liquid baffle is arranged at the lower edge of the liquid separation guiding cone, and a number of raw material dropping holes are formed on the liquid baffle. The raw material dropping holes are aligned with the liquid guiding grooves, so that the reaction raw materials flow out from the side surface of the liquid separation guiding cone.

2. The raw material dropping device capable of increasing the yield of peach aldehyde according to claim 1, characterized in that, The cone angle of the liquid separation guiding cone is 60° to 120°.

3. The raw material dropping device capable of increasing the yield of peach aldehyde according to claim 1, characterized in that, The pipe diameter of the raw material dropping pipe is 5 mm to 40 mm.

4. The raw material dropping device capable of increasing the yield of peach aldehyde according to claim 3, characterized in that, The length of the raw material dropping pipe is 1 m to 10 m.

5. The raw material dropping device capable of increasing the yield of peach aldehyde according to claim 1, characterized in that, The liquid separation guiding cone is hollow to form a cooling cavity, and the cooling cavity is connected with a cooling medium inlet pipe and a cooling medium outlet pipe.

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