Fat-soluble vitamin microcapsule continuous cross-linking method and device

A technology of fat-soluble vitamins and cross-linking method, which is applied in the field of continuous cross-linking of fat-soluble vitamin microcapsules, which can solve the problems of loss and deterioration of effective components, differences in particle cross-linking degree, and lower heat utilization rate, and achieve short cross-linking time , Uniform cross-linking degree of particles, long product shelf life

CN113758195AActive Publication Date: 2021-12-07WANHUA CHEM GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-12-07

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Abstract

The invention discloses a fat-soluble vitamin microcapsule continuous cross-linking method and device. Cross-linking is carried out in a horizontal double-shaft hollow blade dryer, an ultraviolet irradiation device is arranged at the top of an inner cavity of the dryer, and the method comprises the following steps of 1) preheating the dryer, and introducing a mixed gas of carrier gas and water vapor into the cavity of the dryer; and 2) starting the dryer and the ultraviolet irradiation device, adding the fat-soluble vitamin microcapsules to be cross-linked into the cavity of the dryer, adjusting the temperature and humidity in the cavity of the dryer, and carrying out cross-linking reaction under ultraviolet irradiation to prepare the water-repellent fat-soluble vitamin microcapsules. The cross-linking method has the advantages of continuous production, a uniform particle cross-linking degree, low energy consumption, less gas consumption, short cross-linking time, a low vitamin active ingredient loss rate, a high microcapsule yield, low surface oil, a long product shelf life and the like.
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Description

technical field

[0001] The invention relates to a method and device for continuous cross-linking of fat-soluble vitamin microcapsules, in particular to a horizontal double-shaft hollow paddle dryer and a method for continuous cross-linking of fat-soluble vitamin microcapsules. Background technique

[0002] Microcapsule technology is a technology in which trace substances are wrapped in polymer films, and is a micro-packaging technology for storing solids, liquids, and gases. Microcapsules can control the release of stored solids, liquids or gases under certain conditions to achieve specific effects. The embedded substance is called the core material, such as fat-soluble vitamins: vitamin A, D, E, K, carotenoids, etc.; the substance embedded in the core material to achieve microencapsulation is called the wall material, such as gelatin, glucose, fructose etc.

[0003] Existing microcapsules are generally prepared by dispersing the core material in an aqueous solution of the...

Examples

Embodiment 1

[0061] A horizontal twin-shaft hollow paddle dryer (structure such as figure 1 , 2 shown), the housing 1 contains double screw shafts 2, paddles 3 added on the screw shafts 2, and shell jacket layer 4, the double screw shafts 2 and paddles 3 are hollow, and the paddles 3 The shape is wedge-shaped, and the dryer with this structure (ordinary horizontal double-shaft hollow paddle dryer, excluding the following special structures such as mesh plates and screens) can be purchased from the market. In this embodiment, Changzhou Youbo KJG- 120 dryer. On the basis of the dryer structure, the following improvements are made:

[0062] An ultraviolet light irradiation device 5 is arranged on the top of the inner cavity of the dryer.

[0063] The bottom of the horizontal cavity of the above-mentioned dryer is designed as a mesh plate 6, and a layer of carrier gas passage 7 is arranged between the mesh plate 6 and the shell jacket layer 4; the hole type of the mesh plate 6 is a nail hol...

Embodiment 2

[0067] Adopt the horizontal twin-shaft hollow paddle drier of embodiment 1, vitamin A acetate microcapsules (moisture content 9wt%) carry out cross-linking reaction, and step is:

[0068] 1) Pass hot water (75-90°C) into the shaft, paddle, and shell jacket layer of the horizontal double-shaft hollow blade to preheat the horizontal double-shaft hollow blade until the double-shaft The initial temperature is 45°C, and there is no condensed water on the inner wall of the dryer; at the same time, a mixed gas of nitrogen and water vapor is introduced into the cavity of the dryer as a carrier gas (the temperature of the carrier gas is 45°C, and the humidity of the carrier gas is 65%);

[0069] 2) Turn on the drying machine and the ultraviolet light irradiation device, the ultraviolet light wavelength is 300nm, and the light intensity is 180Lux. Add vitamin A acetate microcapsules to be cross-linked into the cavity of the dryer, so that the fat-soluble vitamin microcapsules to be cros...

Embodiment 3

[0075] Using the horizontal twin-shaft hollow paddle dryer of Embodiment 1, vitamin A acetate microcapsules (moisture content 10wt%) carry out cross-linking reaction, and the steps are:

[0076] 1) Introduce steam (105-115°C) into the shaft of the horizontal twin-shaft hollow blade, the blade, and the jacket layer of the shell to preheat the horizontal twin-shaft hollow blade until the initial The temperature is 50°C, and there is no condensed water on the inner wall of the dryer; at the same time, a mixed gas of air and water vapor is introduced into the cavity of the dryer as a carrier gas (the temperature of the carrier gas is 50°C, and the humidity of the carrier gas is 70%);

[0077] 2) Turn on the drying machine and the ultraviolet light irradiation device, the ultraviolet light wavelength is 350nm, and the light intensity is 200Lux. Add vitamin A acetate microcapsules to be cross-linked into the cavity of the dryer, so that the fat-soluble vitamin microcapsules to be cr...