WO2022199678A1 - 一种新型丁酸钠颗粒及其制备方法 - Google Patents

一种新型丁酸钠颗粒及其制备方法 Download PDF

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WO2022199678A1
WO2022199678A1 PCT/CN2022/082916 CN2022082916W WO2022199678A1 WO 2022199678 A1 WO2022199678 A1 WO 2022199678A1 CN 2022082916 W CN2022082916 W CN 2022082916W WO 2022199678 A1 WO2022199678 A1 WO 2022199678A1
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Prior art keywords
butyrate
preparation
additive
sodium butyrate
hot air
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PCT/CN2022/082916
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English (en)
French (fr)
Inventor
章亮
杨育淦
赖州文
黄艺珠
Original Assignee
新奥(厦门)农牧发展有限公司
龙岩新奥生物科技有限公司
徐州新奥生物科技有限公司
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Application filed by 新奥(厦门)农牧发展有限公司, 龙岩新奥生物科技有限公司, 徐州新奥生物科技有限公司 filed Critical 新奥(厦门)农牧发展有限公司
Priority to EP22774332.5A priority Critical patent/EP4316264A1/en
Priority to US18/552,287 priority patent/US20240057640A1/en
Publication of WO2022199678A1 publication Critical patent/WO2022199678A1/zh

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    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/10Organic substances
    • A23K20/158Fatty acids; Fats; Products containing oils or fats
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K20/00Accessory food factors for animal feeding-stuffs
    • A23K20/10Organic substances
    • A23K20/105Aliphatic or alicyclic compounds
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K40/00Shaping or working-up of animal feeding-stuffs
    • A23K40/10Shaping or working-up of animal feeding-stuffs by agglomeration; by granulation, e.g. making powders
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23KFODDER
    • A23K40/00Shaping or working-up of animal feeding-stuffs
    • A23K40/30Shaping or working-up of animal feeding-stuffs by encapsulating; by coating

Definitions

  • the disclosure belongs to the field of additives, and in particular relates to a novel sodium butyrate particle and a preparation method thereof.
  • sodium butyrate is mainly composed of butyrate ion, which has multiple functions such as strong food attractant, gastrointestinal physiological regulator, acidifier and electrolyte balance regulator, which can improve The role of immunity and production performance can also replace some antibiotics.
  • sodium butyrate takes the synthesis of n-butyric acid and sodium hydroxide as the main route.
  • Early sodium butyrate chemical products before 2004 After acid-base reaction, the reaction liquid is directly dried or concentrated, crystallized, centrifuged, filter-pressed, dehydrated and wet cake crushed by various drying methods, and then dried Or filter cake is crushed and pulverized to obtain products.
  • Sodium butyrate powder maintains the inherent shape of needle-like crystals of different sizes, which is easy to intertwine and entangle, and is easy to absorb moisture and agglomerate, and the fluidity is extremely poor. Products with poor fluidity and easy agglomeration will inevitably cause uneven mixing and slow dissolution during use.
  • the product is in the form of fluff needles or cotton wool on the surface ( Figure 1), and it is easy to recrystallize and grow into fluffy agglomerates after long-term storage.
  • FIG. 3 Another kind of preparation process of sodium butyrate is conventional granulation ( Figure 3).
  • Figure 3 Such as: 1. Wet granulation, add 98% sodium butyrate original powder with water or an appropriate amount of binder, stirring method, rocking granulation, rotating method, various forms of extrusion granulation, mixed granulation, granulation, throwing Pills, etc. are all available for granulation, pelletizing, etc., and then formed by many drying and drying methods. 2. Dry granulation, because it is difficult to achieve practically applicable particle size and fluidity due to tableting and granulation, and it is easy to disintegrate and disintegrate under pressure and force. Conventional granular sodium butyrate appears to be granular in various forms, and the particle shapes include irregular particles, bar-shaped particles extruded horizontally and vertically, or granular after granulation and shot blasting.
  • the present disclosure provides a method for preparing a butyrate additive, comprising the following steps: providing a crystal nucleus and a butyrate feed liquid to a fluidized bed; and using a circulating fluidized crystallization method to form butyrate particles.
  • nucleus refers to the embryo of a new phase that can be stably formed initially from the parent phase during crystallization. is the core of new crystal growth.
  • the nuclei can be formed spontaneously or provided externally.
  • the nuclei and the butyrate are of the same or different species; in some embodiments, the nuclei can be non-butyrate nuclei; in some embodiments, The crystal nucleus is a butyrate crystal nucleus; in some embodiments, the butyrate is selected from at least any one of sodium butyrate, potassium butyrate, calcium butyrate or magnesium butyrate; In some embodiments, the fluidization is performed in a continuous fluidized bed.
  • the preparation method comprises the steps of:
  • step S4 Dry the granules prepared in step S3.
  • the total inlet air pressure is 1000-2000pa, and the total inlet air temperature is 100-200°C.
  • the total inlet air pressure may be, for example, 1100pa, 1200pa, 1300pa, 1400pa, 1450pa, 1460pa, 1470pa, 1480pa, 1490pa, 1491pa, 1492pa, 1493pa, 1494pa, 1495pa, 1496pa, 1497pa, 1498pa, 1499pa ⁇ 1500pa ⁇ 1510pa ⁇ 1520pa ⁇ 1530pa ⁇ 1531pa ⁇ 1532pa ⁇ 1533pa ⁇ 1534pa ⁇ 1535pa ⁇ 1536pa ⁇ 1537pa ⁇ 1538pa ⁇ 1539pa ⁇ 1540pa ⁇ 1550pa ⁇ 1560pa ⁇ 1570pa ⁇ 1580pa ⁇ 1590pa ⁇ 1600pa ⁇ 1650pa ⁇ 1651pa ⁇ 1652pa ⁇ 1653pa ⁇ 1654pa, 1655pa, 1656pa, 1657pa, 1658pa, 1659p
  • the total inlet air temperature can be, for example, 100°C, 110°C, 120°C, 130°C, 131°C, 132°C, 133°C, 134°C, 135°C, 136°C, 137°C, 138°C, 139°C, 140°C, 141°C, 142°C, 143°C, 144°C, 145°C, 146°C, 147°C, 148°C, 149°C, 150°C, 160°C, 161°C, 162°C, 163°C, 164°C , 165°C, 166°C, 167°C, 168°C, 169°C, 170°C, 180°C, 181°C, 182°C, 183°C, 184°C, 185°C, 186°C, 187°C, 188°C, 189°C, 190 °C or 200 °C, or a range consisting of any two values
  • the hot air is graded hot air.
  • the hot air is sequentially blown in longitudinally from the bottom, and the inlet air temperature is 100-280°C; preferably 120-230°C; more preferably 140-200°C.
  • the inlet air temperature can be, for example, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, 180°C, 190°C, 200°C, 210°C, 220°C, 230°C, 240°C , 250°C, 260°C, or 270°C; or can be, for example, 185°C, 195°C, 205°C, or 215°C; or a range of any two of the above values.
  • the material layer wind pressure difference is 1000-3000pa, and the material layer temperature is 40-180°C; in some embodiments, the material layer wind pressure difference is 1500-2500pa, and the material layer temperature is 40-150°C.
  • the wind pressure difference of the material layer can be, for example, 1600pa, 1700pa, 1800pa, 1900pa, 2100pa, 2200pa, 2300pa or 2400pa; Or it can be, for example, 2041pa, 2042pa, 2043pa, 2044pa, 2045pa, 2046pa, 2047pa, 2048pa or 2049pa; or a range composed of any two values above.
  • the graded hot air is 140-180°C for stage 1, 120-160°C for stage 2, and 100-140°C for stage 3.
  • the graded hot air stage 1 may be, for example, 150°C, 160°C, 161°C, 162°C, 163°C, 164°C, 165°C, 166°C, 167°C, 168°C, 169°C or 170°C, or any of the above A range consisting of two values;
  • the graded hot air level 2 may be, for example, 130°C, 140°C, 141°C, 142°C, 143°C, 144°C, 145°C, 146°C, 147°C, 148°C, 149°C or 150°C, or a range composed of any two values above;
  • the third stage of the classified hot air can be, for example, 110°C, 120°C, 121°C, 122°C, 123°C, 124°C, 125°C, 126°C,
  • the butyrate feed liquid is sprayed in stages.
  • the concentration of the butyrate feed is 5-80%.
  • the butyrate concentration of the butyrate feed solution can be, for example, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65% , 70%, or 75%; or can be 46%, 47%, 48%, 49%, 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, or 59% %; or can be 49.1%, 49.2%, 49.3%, 49.4%, 49.5%, 49.6%, 49.7%, 49.8%, 49.9%, 50%, 50.1%, 50.2%, 50.3%, 50.4%, 50.5%, 50.6%, 50.7%, 50.8% or 50.9%, or a range of any two values above.
  • the vehicle for the butyrate feed is selected from soluble vehicles.
  • the solvent of the butyrate feed solution is selected from at least one of water, ethanol, and isopropanol.
  • the total injection rate of the butyrate feed is 100kg-10T per hour.
  • the injection volume can be, for example, 200kg, 300kg, 400kg, 500kg, 600kg, 700kg, 800kg, 900kg, 1000kg, 2000kg, 3000kg, 4000kg, 5000kg, 6000kg, 7000kg, 8000kg, or 9000kg per hour, or any two values above. range of composition.
  • the first-stage injection volume of the graded butyrate feed solution is 280-400kg/hour
  • the second-stage injection volume is 280-380kg/hour
  • the third-stage injection volume is 250-370kg/hour.
  • the dehydration method is hot air drying; in some embodiments, the hot air drying is graded hot air drying; 2nd grade 120-160°C, 3rd grade 100-140°C.
  • the graded hot air stage 1 may be, for example, 150°C, 160°C, 161°C, 162°C, 163°C, 164°C, 165°C, 166°C, 167°C, 168°C, 169°C or 170°C, or any of the above A range consisting of two values;
  • the graded hot air level 2 may be, for example, 130°C, 140°C, 141°C, 142°C, 143°C, 144°C, 145°C, 146°C, 147°C, 148°C, 149°C or 150°C, or a range composed of any two values above;
  • the third stage of the classified hot air can be, for example, 110°C, 120°C, 121°C, 122°C, 123°
  • the fluidized bed in the step S4, is dried to a liquid content of 0.1%-6%, for example, it can be dried to a liquid content of 0.5%, 1%, 1.5%, 1.6%, 1.7%, 1.8 %, 1.9%, 2%, 2.1%, 2.2%, 2.3%, 2.4%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5% or 5.5%, or a range of any two of the above , out of the fluidized bed.
  • drying to a liquid content of 0.5%-3% exits the fluidized bed; in some embodiments, drying to a liquid content of 1%-2.5% exits the fluidized bed; in some embodiments, drying to When the liquid content is 2%, it flows out of the fluidized bed.
  • the preparation method further includes step S5. Screening the particles prepared in step S4 according to particle size.
  • the particle size of step S5 is steplessly adjusted. In some embodiments, the particle size of the step S5 can be set to any particle size according to manufacturing needs. In some embodiments, the infinitely adjustable particle size can be adjusted continuously and/or at intervals with arbitrary precision.
  • the particle size of the step S5 is 10-120 mesh.
  • the particle size of the step S5 is 10-80 mesh.
  • the particle size of the step S5 can be, for example, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115 or 120 mesh, or the range of any two values above.
  • the steps S1-S5 are performed cyclically.
  • the present disclosure provides a butyrate additive, which is prepared by the preparation method.
  • the present disclosure provides a butyrate-based additive, wherein the butyrate-based additive is granular and has a structure formed by agglomeration of more than one spheroids with needle-like crystals between the more than one spheroids interweaving structure.
  • the particle size of the butyrate additive is 10-120 mesh. In some embodiments, the particle size of the butyrate additive is 10-80 mesh. In some embodiments, the particle size of the butyrate additive may be, for example, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26 , 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95 , 100, 105, 110, 115 or 120 mesh, or the range of any two values above.
  • the spheroids have a particle size of 0.05-1.0 mm.
  • the particle size of the spheroid may be 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm or 0.95mm, or a range of any two values above.
  • a value can be ⁇ 0.1% of the value (or range of values), ⁇ 1% of the value (or range of values), ⁇ 2% of the value (or range of values), the value (or range of values) range), ⁇ 10% of the value (or range of values), ⁇ 15% of the value (or range of values), ⁇ 20% of the value (or range of values), etc. Any numerical range recited in this disclosure is intended to include all subranges or intervening values subsumed therein.
  • two or more numerical ranges for a disclosed parameter encompass all possibilities of the numerical ranges that might be claimed using the endpoints of the disclosed ranges combination.
  • parameter X is exemplified in this disclosure as having a value in the range of 1-10, it also describes sub-ranges of parameter X, including by way of example only: 1-9, 1-8, 1-7 , 2-9, 2-8, 2-7, 3-9, 3-8, 3-7, 2-8, 3-7, 4-6 or 7-10, 8-10 or 9-10.
  • a range includes its endpoints and values within the endpoints, eg, the range 0-5 includes 0, >0, 1, 2, 3, 4, ⁇ 5, and 5.
  • the additive is for addition to a mixture (eg, feed) as part of the mixture; in some embodiments, the additive is a feed additive.
  • the present disclosure provides a feed comprising the butyrate additive; in some embodiments, the feed further comprises a basal diet; in some embodiments, the basal diet comprises rice bran , at least one of corn, soybean meal and bran.
  • the sodium butyrate granules prepared by the specific preparation method of the present disclosure overcome the problem that the existing sodium butyrate is not easily mixed evenly in the solid feed, and at the same time, even after transportation, the sodium butyrate particles of the present disclosure Sodium butyrate granules are also not easy to settle in the feed. It is speculated that the special structure and surface morphology of the sodium butyrate granules prepared in the present disclosure are related to the "hook and bite" effect of the particle surface structure and other raw materials in the feed, even after transportation. Bumps are also less prone to subsidence. Effectively improve the utilization rate of feed additives.
  • the sodium butyrate particles prepared in the present disclosure have a self-contained structure that is similar to onion skin and extremely denser than the onion skin layer without peeling off the layer in the process of particle growth; A structure similar to a grape bunch formed by bonding, wherein the grain size of the agglomerated small and medium particles (spheroids) of the grape-like bunch is 0.05-1.0 mm. It is different from conventional granulation, which is simple and multi-step process of bonding or extruding the original 98% sodium butyrate powder into agglomerates, forming granules and then drying them.
  • the novel granules of the present disclosure are spherical granules, have excellent fluidity, are easy to mix and use, dissolve quickly, and have light odor.
  • the particle size range can be adjusted steplessly, one-time granulation and continuous production, and the amount is large and controllable.
  • Fig. 1 is the micrograph of early sodium butyrate chemical product
  • Fig. 2 is the photomicrograph of the sodium butyrate that is spray-dried into powder
  • Fig. 3 is the photomicrograph of the sodium butyrate prepared by conventional granulation
  • Example 4 is a photo of the sodium butyrate particles prepared in Example 1 under a 4x microscope;
  • Example 5 is a photo of the sodium butyrate particles prepared in Example 1 under a 10-fold microscope
  • Figure 6 is a photo of the sodium butyrate particles prepared in Example 1.
  • Figure 7 is a photograph of commercially available bar-shaped sodium butyrate particles
  • Figure 8 is a photograph of commercially available smooth spherical sodium butyrate particles
  • Fig. 9 is the photo of 3 kinds of different particles under the electron microscope of 30 times and 50 times among the embodiment 2;
  • the lower row is the electron microscope photograph taken after manually cutting the particle with a stainless steel blade;
  • Figure 10 is the cross-sectional photos of 3 different particles under 50 times, 100 times, and 200 times electron microscopes in Example 2;
  • Fig. 11 is the photograph under the electron microscope of 400 times and 500 times of 3 kinds of different particles in embodiment 2;
  • Fig. 12 is the photo of 3 kinds of different particles in embodiment 2 under 1000 times electron microscope;
  • Fig. 13 is the photograph of 3 kinds of different particles in embodiment 2 under the electron microscope of 2000 times;
  • Fig. 14 is the photograph of 3 kinds of different particles in embodiment 2 under the electron microscope of 3000 times;
  • Figure 15 is a comparison of the mixing uniformity test results of different particles of sodium butyrate.
  • compositions eg, media
  • methods include the recited elements, but do not exclude other elements.
  • Consisting essentially of is meant to exclude other elements of any significance to the combination for the stated purpose.
  • a composition consisting essentially of the elements defined in this disclosure does not exclude other materials or steps that would not materially affect the basic and novel characteristics of the claimed disclosure.
  • Consisting of means excluding other constituent trace elements and substantial method steps. Embodiments defined by each of these transition terms are within the scope of this disclosure.
  • the term “and/or” is meant to include any and all possible combinations of one or more of the associated listed items. When used in a list of two or more items, the term “and/or” means that any one of the listed items can be used alone or any combination of two or more of the listed items can be used . For example, if a composition, combination, construction, etc.
  • composition may comprise A alone; B alone; C alone; D alone ; Combinations containing A and B; Combinations containing A and C; Combinations containing A and D; Combinations containing B and C; Combinations containing B and D; Combinations containing C and D; Combinations containing A, B and C Combination; A, B, and D combination; A, C, and D combination; B, C, and D combination; or A, B, C, and D combination used.
  • Embodiment 1 A kind of preparation method of novel sodium butyrate granules
  • the preparation method of novel sodium butyrate granules comprises the following steps:
  • Multi-channel classification hot air parameters the first stage is 162 °C, the second stage is 143 °C, and the third stage is 126 °C; the air pressure difference of the material layer is 2041pa, and the material layer temperature is 61 °C; the masterbatch is in fluidized boiling or fluidization in the bed. rollover state.
  • step S1 the coarse particles are selectively moved toward the discharge end of the fluidized bed in fluidization, while the fine particles, powder particles and fine powder are moved toward the front end of the fluidized bed, especially the fine powder is selectively at the top of the fluidized bed.
  • Sodium butyrate feed liquid is sprayed into the front end of the fluidized bed in stages.
  • concentration of the sodium butyrate aqueous solution is 50.2%.
  • the parameters of classification and spraying are: 352kg/hour for the first level, 335kg/hour for the second level, and 319kg/hour for the third level. Hour.
  • step S2 the fine powder and small particles at the front end receive the feed liquid, which is not only sticky to each other but also receives the liquid independently, and the gradually growing particles gradually fluidize and sink from the front end to the rear end.
  • Hot air drying and dehydration, parameters of hot air drying and dehydration (same as S1): total inlet air pressure 1532pa, temperature 164°C, time 1.2 hours.
  • step S5 The particles prepared in step S4 are sieved. Since the particles are steplessly regulated, particles of 18-40 mesh (ie, particle size of 0.425-1.0 mm) are selected for packaging in this embodiment; the coarse particles with excessive particle size are crushed After that, the fine powder with too small particle size is returned to the fluidized bed, and the granulation process of steps S1-S4 is cycled.
  • particles of 18-40 mesh ie, particle size of 0.425-1.0 mm
  • the particles are formed on the basis of sodium butyrate powder or existing sodium butyrate particles
  • step S2 continues to spray the sodium butyrate feed liquid and smears
  • step S4 continues to dry and gradually grow up, as required Screening equipment with different apertures can be set in step S5, so that the final product can be steplessly controlled in the particle size range of 10-80 mesh (0.180-2.00 mm).
  • the coating process it has a self-contained structure that is similar to onion skin and extremely denser than onion skin without peeling off the layer; it also has a structure similar to grape bunches formed by agglomeration, agglomeration and bonding of small and medium particles.
  • Particle 2 and Particle 3 correspond to Particle 1 by changing parameters such as hot air temperature, corresponding air pressure, and material solution solubility to make sodium butyrate particles. Table 1 below.
  • Each sample was freeze-dried at minus 50 °C before scanning electron microscopy to meet the operating conditions of the scanning electron microscope.
  • Figure 9-14 shows the comparison pictures of three different particles of the sample to be tested under different electron microscope magnifications.
  • the sodium butyrate particles of Example 1 have a spherical shape in the shape of grape clusters.
  • the cross section of the sodium butyrate of Example 1 had layered peeling, and the surface showed a bumpy ball-like agglomeration.
  • the sodium butyrate of Example 1 and its spheroids present needle-like crystals and are intertwined and connected. It is significantly different from the commercially available bar-shaped sodium butyrate and smooth spherical sodium butyrate in terms of surface morphology, cross-section, and crystal interweaving state.
  • Test method 40g each of 3 kinds of granular sodium butyrate was mixed with 20kg of rice bran in a mixer for 20 minutes, and each sample was repeated 3 times.
  • the sedimentation of granular sodium butyrate in the feed was tested before and after transportation. The tests are performed simultaneously on the same batch.

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Abstract

一种新型丁酸钠颗粒及其制备方法,所述的丁酸钠颗粒具有类似洋葱状的层状结构,层状结构紧密又不剥离,且具有类球形的外观;兼具有中小颗粒附聚、团聚粘结一体成型的类似葡萄串结构。丁酸钠颗粒在饲料中可以更有效的均匀分散,且在储存和运输过程中不易发生沉降,有效提高了使用效率。

Description

一种新型丁酸钠颗粒及其制备方法 技术领域
本公开属于添加剂领域,具体涉及一种新型丁酸钠颗粒及其制备方法。
背景技术
丁酸钠作为一种非抗生素促生长饲料添加剂,其主要作用成分是丁酸根离子,具有强诱食剂、胃肠道生理调节剂、酸化剂和电解质平衡调节剂等多重功效,起到提高机体免疫力及生产性能的作用,还可以替代部分抗生素,在2006年已被农业部列入《饲料添加剂品种目录》中的新型饲料添加剂。
丁酸钠的生产制备,以正丁酸和氢氧化钠合成为主要路径。2004年前的早期丁酸钠化工产品:经酸碱反应,直接将反应料液烘干或浓缩、长晶、离心、压滤、脱水湿饼破碎后各种烘干方式,然再将干块或滤饼进行破碎、粉碎得产品。丁酸钠粉粒保持固有的大小不一的针状结晶体形态,容易交织缠绕一起,极易吸潮结块,流动性极差。流动性差且极容易结块的产品,在使用过程中不可避免会造成混合不均匀,溶解缓慢的现象。产品表观上为毛絮针状或棉絮状(图1),长期存放容易重结晶、长晶成绒毛状成坨结块物。
2004年5月面世了喷雾干燥成粉的丁酸钠产品(图2):经酸碱反应,直接将反应料液通过离心、压力喷雾干燥塔将丁酸钠喷雾干燥成粉。该种制备方法制备的丁酸钠粉末颗粒微观形状为微球囊状,相对于早期的丁酸钠,喷雾干燥的丁酸钠流散性好,在密封保存得当情况下,不吸潮且不易结块,在水中速溶,极大地方便于混合使用及溶解使用,但混合在饲料中,仍然存在不易混匀,且易沉降在底部的问题。
还有一类丁酸钠的制备工艺是常规造粒(图3)。如:1、湿法制粒,将丁酸钠98%原粉加水或适量粘合剂,搅拌法、摇摆颗粒、旋转法、各种形式挤压造粒法、混合造粒法、整粒、抛丸等一应俱全的造粒、造丸等,再经诸多烘干干燥方等成形。2、干法制粒,由于压片、压粒成形难以达到实际适用的粒度及流动性,且容易受压受力崩解散开不适用。常规粒型丁酸钠,表观上为各种形态的颗粒状,颗粒形状有不规则的颗粒、横侧竖挤压的条柱状颗粒、或经过整粒、抛丸的粒状等。
现有的丁酸钠颗粒由于其形状多为纯圆或条柱状,混合在饲料中时,容易出现无法均匀分散和易沉降至饲料底部的问题,这将导致添加效率不高,丁酸钠的浪费等一系列问题。
发明内容
一方面,本公开提供了一种丁酸盐类添加剂的制备方法,包含以下步骤:向流化床提供晶核和丁酸盐料液;采用循环流化结晶方式,形成丁酸盐颗粒。
本公开所用的术语“晶核”是指在结晶过程中从母相中最初形成的可以稳定存在的新相的胚胎。是新晶体生长的核心。晶核可以是自发形成的,也可以是外界提供的。
在一些实施方案中,所述晶核和所述丁酸盐为同种或不同种物质;在一些实施方案中,所述晶核可以为非丁酸盐类晶核;在一些实施方案中,所述的晶核为丁酸盐类的晶核;在一些实施方案中,所述丁酸盐类选自丁酸钠、丁酸钾、丁酸钙或丁酸镁中的至少任意一种;在一些实施方案中,所述流化在连续流化床中进行。
在一些实施方案中,所述制备方法包括以下步骤:
S1.提供晶核后向流化床内吹入热风;
S2.喷入丁酸盐料液,颗粒长大;
S3.持续对步骤S2制备的颗粒干燥;
S4.将步骤S3制备的颗粒干燥。
在一些实施方案中,所述步骤S1中,总进风风压为1000-2000pa,总进风温度为100-200℃。
在一些实施方案中,所述总进风风压可以是例如1100pa、1200pa、1300pa、1400pa、1450pa、1460pa、1470pa、1480pa、1490pa、1491pa、1492pa、1493pa、1494pa、1495pa、1496pa、1497pa、1498pa、1499pa、1500pa、1510pa、1520pa、1530pa、1531pa、1532pa、1533pa、1534pa、1535pa、1536pa、1537pa、1538pa、1539pa、1540pa、1550pa、1560pa、1570pa、1580pa、1590pa、1600pa、1650pa、1651pa、1652pa、1653pa、1654pa、1655pa、1656pa、1657pa、1658pa、1659pa、1660pa、1700pa、1800pa或1900pa,或以上任意两个数值组成的范围。在一些实施方案中所述总进风温度可以是例如100℃、110℃、120℃、130℃、131℃、132℃、133℃、134℃、135℃、136℃、137℃、138℃、139℃、140℃、141℃、142℃、143℃、144℃、145℃、146℃、147℃、148℃、149℃、150℃、160℃、161℃、162℃、163℃、164℃、165℃、166℃、167℃、168℃、169℃、170℃、180℃、181℃、182℃、183℃、184℃、185℃、186℃、187℃、188℃、189℃、190℃或200℃,或以上任意两个数值组成的范围。
在一些实施方案中,所述热风为分级的热风。
在一些实施方案中,所述热风从底部纵向依次吹入,进风温度100-280℃;优选为120-230℃;更优选140-200℃。所述进风温度可以是例如,110℃、120℃、130℃、140℃、 150℃、160℃、170℃、180℃、190℃、200℃、210℃、220℃、230℃、240℃、250℃、260℃或270℃;或者可以是例如,185℃、195℃、205℃或215℃;或以上任意两个数值组成的范围。
在一些实施方案中,料层风压差1000-3000pa,料层温度40-180℃;在一些实施方案中,料层风压差1500-2500pa,料层温度40-150℃。所述料层风压差可以是例如,1600pa、1700pa、1800pa、1900pa、2100pa、2200pa、2300pa或2400pa;或者可以是例如,2010pa、2020pa、2030pa、2040pa、2050pa、2060pa、2070pa、2080pa或2090pa;或者可以是例如,2041pa、2042pa、2043pa、2044pa、2045pa、2046pa、2047pa、2048pa或2049pa;或以上任意两个数值组成的范围。
在一些实施方案中,分级热风第1级140-180℃,第2级120-160℃,第3级100-140℃。所述分级热风第1级可以是例如,150℃、160℃、161℃、162℃、163℃、164℃、165℃、166℃、167℃、168℃、169℃或170℃,或以上任意两个数值组成的范围;所述分级热风第2级可以是例如130℃、140℃、141℃、142℃、143℃、144℃、145℃、146℃、147℃、148℃、149℃或150℃,或以上任意两个数值组成的范围;所述分级热风第3级可以是例如110℃、120℃、121℃、122℃、123℃、124℃、125℃、126℃、127℃、128℃、129℃、130℃或135℃,或以上任意两个数值组成的范围。
在一些实施方案中,所述步骤S2中,分级喷入丁酸盐料液。
在一些实施方案中,所述丁酸盐料液的浓度为5-80%。所述丁酸盐料液的丁酸盐浓度可以是例如10%、15%、20%、25%、30%、35%、40%、45%、50%、55%、60%、65%、70%或75%;或者可以是46%、47%、48%、49%、50%、51%、52%、53%、54%、55%、56%、57%、58%或59%;或者可以是49.1%、49.2%、49.3%、49.4%、49.5%、49.6%、49.7%、49.8%、49.9%、50%、50.1%、50.2%、50.3%、50.4%、50.5%、50.6%、50.7%、50.8%或50.9%,或以上任意两个数值组成的范围。
在一些实施方案中,所述丁酸盐料液的溶媒选自可溶的溶媒。
在一些实施方案中,所述丁酸盐料液的溶媒选自水、乙醇、异丙醇中的至少一种。
在一些实施方案中,所述丁酸盐料液的总喷入量为每小时100kg-10T。所述喷入量可以是例如每小时200kg、300kg、400kg、500kg、600kg、700kg、800kg、900kg、1000kg、2000kg、3000kg、4000kg、5000kg、6000kg、7000kg、8000kg或9000kg,或以上任意两个数值组成的范围。
在一些实施方案中,所述分级喷入丁酸盐料液的第1级喷入量为280-400kg/小时,第2级喷入量为280-380kg/小时,第3级喷入量为250-370kg/小时。
在一些实施方案中,所述步骤S3中,脱水方式为热风干燥;在一些实施方案中,所述热风干燥为分级热风干燥;在一些实施方案中,分级热风干燥第1级140-180℃,第2级120-160℃,第3级100-140℃。所述分级热风第1级可以是例如,150℃、160℃、161℃、162℃、163℃、164℃、165℃、166℃、167℃、168℃、169℃或170℃,或以上任意两个数值组成的范围;所述分级热风第2级可以是例如130℃、140℃、141℃、142℃、143℃、144℃、145℃、146℃、147℃、148℃、149℃或150℃,或以上任意两个数值组成的范围;所述分级热风第3级可以是例如110℃、120℃、121℃、122℃、123℃、124℃、125℃、126℃、127℃、128℃、129℃、130℃或135℃,或以上任意两个数值组成的范围。
在一些实施方案中,所述步骤S4中,干燥至液体含量0.1%-6%时流出流化床,例如可以是干燥至液体含量0.5%、1%、1.5%、1.6%、1.7%、1.8%、1.9%、2%、2.1%、2.2%、2.3%、2.4%、2.5%、3%、3.5%、4%、4.5%、5%或5.5%,或以上任意两个数值组成的范围,时流出流化床。在一些实施方案中,干燥至液体含量0.5%-3%时流出流化床;在一些实施方案中,干燥至液体含量1%-2.5%时流出流化床;在一些实施方案中,干燥至液体含量2%时流出流化床。
在一些实施方案中,所述制备方法还包括步骤S5.将步骤S4制备的颗粒按粒径分筛。
在一些实施方案中,所述步骤S5的粒径是无级调节的。在一些实施方案中,所述步骤S5的粒径可以根据制造的需要,设置任意的粒径大小。在一些实施方案中,无级调节的粒径是可以以任意精度连续和/或间隔进行调整的。
在一些实施方案中,所述步骤S5的粒径为10-120目。
在一些实施方案中,所述步骤S5的粒径为10-80目。所述步骤S5的粒径可以是例如11、12、13、14、15、16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36、37、38、39、40、45、50、55、60、65、70、75、80、85、90、95、100、105、110、115或120目,或以上任意两个数值组成的范围。
在一些实施方案中,所述步骤S1-S5是循环进行的。
一方面,本公开提供了一种丁酸盐类添加剂,是由所述的制备方法制备的。
一方面,本公开提供了一种丁酸盐类添加剂,所述丁酸盐类添加剂呈颗粒状,具有由不止一个类球体附聚形成的结构,所述不止一个类球体之间具有针状晶体交织结构。
在一些实施方案中,所述丁酸盐类添加剂的粒径为10-120目。在一些实施方案中,所述丁酸盐类添加剂的粒径为10-80目。在一些实施方案中,所述丁酸盐类添加剂的粒径可以是例如11、12、13、14、15、16、17、18、19、20、21、22、23、24、25、26、27、28、29、30、31、32、33、34、35、36、37、38、39、40、45、50、55、60、65、70、 75、80、85、90、95、100、105、110、115或120目,或以上任意两个数值组成的范围。
在一些实施方案中,所述类球体的粒径为0.05-1.0mm。例如,所述类球体的粒径可以为0.1mm、0.15mm、0.2mm、0.25mm、0.3mm、0.35mm、0.4mm、0.45mm、0.5mm、0.55mm、0.6mm、0.65mm、0.7mm、0.75mm、0.8mm、0.85mm、0.9mm或0.95mm,或以上任意两个数值组成的范围。
如本公开中所使用的,包括如实施例中所使用的且除非另有明确规定,所有数字都可以看成如同以“基本上”、“大约”或“约”措辞开头一样,即使该术语并未明确出现。当描述幅度和/或位置以表明所描述的数值和/或位置在合理的预期值和/或位置范围内时,可以使用短语“大约”或“约”。例如,数值可以是所述数值(或数值范围)的±0.1%、所述数值(或数值范围)的±1%、所述数值(或数值范围)的±2%、所述数值(或数值范围)的±5%、所述数值(或数值范围)的±10%、所述数值(或数值范围)的±15%、所述数值(或数值范围)的±20%等。本公开所述的任何数值范围旨在包括其中所含的所有子范围或中间值。
对具体参数(例如温度、分子量、重量百分比等)的数值和数值范围的公开不排除对本公开有用的其他数值和数值范围。可以预想的是,给定参数的两个或更多个具体示例数值可以确定参数可要求的数值范围的端点。例如,如果参数X在本公开中举例为具有数值A且还举例为具有数值Z,则可以预期参数X可以具有从大约A到大约Z的数值范围。类似地,可以预期公开参数的两个或者更多个数值范围(无论这些范围是嵌套的、有重叠的还是截然不同的)就包括了使用所公开范围的端点可以要求的数值范围的所有可能组合。例如,如果参数X在本公开中示例为具有1-10范围内的值,则它还描述了参数X的子范围,包括仅作为例子的,如:1-9、1-8、1-7、2-9、2-8、2-7、3-9、3-8、3-7、2-8、3-7、4-6或7-10、8-10或9-10。范围包括其端点以及端点内的值,例如范围0-5包括0、>0、1、2、3、4、<5和5。
在一些实施方案中,所述添加剂用于添加至混合物(例如,饲料)中,成为混合物的一部分;在一些实施方案中,所述添加剂为饲料添加剂。
一方面,本公开提供了一种饲料,包含所述的丁酸盐类添加剂;在一些实施方案中,所述的饲料还包括基础日粮;在一些实施方案中,所述基础日粮包含米糠、玉米、豆粕、麸皮中的至少一种。
在一些实施方案中,意外发现本公开特定的制备方法所制备的丁酸钠颗粒克服了现有的丁酸钠在固体饲料中不易混合均匀的问题,同时即使在经历了运输之后,本公开的丁酸钠颗粒也不易在饲料中发生降沉,推测与本公开制备的丁酸钠颗粒特殊的结构与表面形态 有关,颗粒表面结构与饲料中的其它原料发生“挂钩咬合”效应,即使经历运输颠簸也不易发生沉降。有效提升了饲料添加剂的利用率。
本公开制备的丁酸钠颗粒,在颗粒长大过程中,使得颗粒既有类似洋葱皮样又较洋葱皮层极致密而又不剥离层的自成一体结构;兼具有中小颗粒附聚、团聚粘结一体成型的类似葡萄串结构,其中类葡萄串附团聚的小中颗粒(类球体)的粒径0.05-1.0mm。与常规制粒简单多道工序将丁酸钠98%原粉粒相互粘结或挤压成团,整粒成型再烘干不同。
本公开的新型颗粒既成类球状颗粒,又流动性极好,便于混合使用又速溶,且气味轻。粒度范围可无级调控,一次成粒成型连续生产且量大可控。
附图说明
图1为早期丁酸钠化工产品的显微照片;
图2为喷雾干燥成粉的丁酸钠的显微照片;
图3为常规造粒制备的丁酸钠的显微照片;
图4为实施例1制备的丁酸钠颗粒在4倍显微镜下的照片;
图5为实施例1制备的丁酸钠颗粒在10倍显微镜下的照片;
图6为实施例1制备的丁酸钠颗粒的照片;
图7为市售条形丁酸钠颗粒的照片;
图8为市售光滑球形丁酸钠颗粒的照片;
图9为实施例2中3种不同颗粒在30倍和50倍电镜下的照片;下排为人工用不锈钢刀片切开颗粒后拍摄的电镜照片;
图10为实施例2中3种不同颗粒在50倍、100倍、200倍电镜下的剖面照片;
图11为实施例2中3种不同颗粒在400倍和500倍电镜下的照片;
图12为实施例2中3种不同颗粒在1000倍电镜下的照片;
图13为实施例2中3种不同颗粒在2000倍电镜下的照片;
图14为实施例2中3种不同颗粒在3000倍电镜下的照片;
图15为不同颗粒丁酸钠的混合均匀度测试结果对比。
具体实施方式
以下通过具体的实施例进一步说明本公开的技术方案,具体实施例不代表对本公开保护范围的限制。其他人根据本公开理念所做出的一些非本质的修改和调整仍属于本公开的保护范围。
“包含”或“包括”旨在表示组合物(例如介质)和方法包括所列举的要素,但不排除其他要素。当用于定义组合物和方法时,“基本上由……组成”意味着排除对于所述目的 的组合具有任何重要意义的其他要素。因此,基本上由本公开定义的元素组成的组合物不排除不会实质上影响要求保护的本公开的基本和新颖特征的其他材料或步骤。“由……组成”是指排除其他组成部分的微量元素和实质性的方法步骤。由这些过渡术语中的每一个定义的实施方案都在本公开的范围内。
本公开中使用的术语“和/或”是指包含一个或多个相关联的列出项目的任何或所有可能组合。当在两个或多个项目的列表中使用时,术语“和/或”表示所列出的项目中的任何一个可以单独使用,或者可以使用两个或多个所列出的项目的任何组合。例如,如果组合物,组合,构造等被描述为包括(或包含)组分A,B,C和/或D,则该组合物可以单独包含A;单独包含B;单独包含C;单独包含D;包含A和B的组合;包含A和C的组合;包含A和D的组合;包含B和C的组合;包含B和D的组合;包含C和D的组合;包含A,B和C的组合;包含A,B和D组合;包含A,C和D的组合;包含B,C和D组合;或A,B,C和D组合使用。
实施例1 一种新型丁酸钠颗粒的制备方法
1、颗粒1
新型丁酸钠颗粒的制备方法,包括以下步骤:
S1.在流化床内,一次性加入丁酸钠母料550公斤,多道分级的热风由流化床底部纵向排列依次吹入,热风参数如下:总进风风压1532pa,温度164℃;多道分级热风参数:第1级162℃,第2级143℃,第3级126℃;料层风压差2041pa,料层温度61℃;使母粒在床内处于流化沸腾或流化翻滚状态。
步骤S1选择性地使粗颗粒往流化床出料端流化移动,而细颗粒、粉粒及细粉则往流化床前端移动,尤其细粉选择地处于流化的顶端。
S2.在流化床前端分级喷入丁酸钠料液,丁酸钠水溶液的浓度为50.2%,分级喷入参数:第1级352kg/小时,第2级335kg/小时,第3级319kg/小时。
步骤S2使前端细粉及小颗粒接受到料液,既相互黏粘又单独受液,渐长大的颗粒由前端逐渐流化下沉往后端移动。
S3.热风干燥脱水,热风干燥脱水的参数(同S1):总进风风压1532pa,温度164℃,时间1.2小时。
S4.热风干燥脱水后,当颗粒到达末端时已脱水至2%之内并流动排出流化床体。
S5.步骤S4制备的颗粒经分筛,由于颗粒是无级调节的,本实施例选择18-40目(即粒径0.425-1.0mm)的颗粒进行包装;粒径过大的粗颗粒经破碎后与粒径过小的细粉返回至流化床内,循环步骤S1-S4的造粒过程。
本次实验制备丁酸钠颗粒651kg,经测试,含水量为1.6%,丁酸钠的含量为99.58%。
制备的丁酸钠颗粒在4倍显微镜下的照片如图4所示,在10显微镜下的照片如图5所示。可见丁酸钠颗粒外观呈类球状,且颗粒致密,不中空。
在本实施例中,颗粒成型为在丁酸钠粉末或既有丁酸钠颗粒基础上,步骤S2持续喷入丁酸钠料液并涂抹,步骤S4持续干燥并逐渐长大的过程,根据需要可以在步骤S5设置不同孔径的分筛设备,从而终产品可无级控制在10-80目(0.180-2.00mm)的粒度范围。在涂层过程中既有类似洋葱皮样又较洋葱皮层极致密而又不剥离层的自成一体结构;兼具有中小颗粒附聚、团聚粘结一体成型的类似葡萄串结构。
2、颗粒2-3
颗粒2、颗粒3对应颗粒1改变了热风温度、对应风压、料液溶度等参数制成丁酸钠颗粒。如下表1。
表1
Figure PCTCN2022082916-appb-000001
Figure PCTCN2022082916-appb-000002
实施例2 颗粒丁酸钠性能测试
待测样品:实施例1制备的丁酸钠颗粒(图6)、市售条形丁酸钠颗粒(图7)、市售光滑球形丁酸钠颗粒(图8)。
颗粒外观、粒度、气味
3种不同颗粒的基本性质如表2所示。
表2 不同颗粒丁酸钠的各项性质
Figure PCTCN2022082916-appb-000003
颗粒电镜图片对比
各样品做扫描电镜前,先在零下50℃进行冷冻干燥,以适应扫描电镜的操作条件要求。
如图9-14示出了待测样品3种不同的颗粒在不同电镜放大倍数下对比图片。如图9所示,实施例1的丁酸钠颗粒其表观呈现葡萄串状的类球型。如图10所示,实施例1的丁酸钠其剖面有层状剥离,表面呈现崎岖类球附聚。进一步放大,如图11-14,实施例1的丁酸钠其类球之间,呈现针状晶体并且交织相连。与市售的条形丁酸钠及光滑球形丁酸钠在表面形态、剖面、晶型交织状态等方面都存在显著不同。
混合均匀度及沉降测试
测试方法:将3种颗粒丁酸钠每种40g分别与20公斤米糠在混合机混合20分钟,每种样品做3个重复。
混合均匀度
在每一个重复中,在混合了颗粒丁酸钠的米糠的10个随机位点取样,每次取样20g,将10个位点的取样混合作为一个重复的样品,测混合均匀度(变异系数CV),检测依据为GB/T 5918-2008。
3种颗粒丁酸钠的CV结果如表3所示:
表3 不同颗粒丁酸钠的混合均匀度测试(%)
Figure PCTCN2022082916-appb-000004
Figure PCTCN2022082916-appb-000005
结合图9可见,实施例1制备的颗粒丁酸钠的CV值最低,仅为1.45%,且与其它2种颗粒丁酸钠具有显著性差异(p<0.01),说明本公开制备的颗粒丁酸钠具有更好的混合均匀度。
沉降测试
测试运输前后颗粒丁酸钠在饲料中的沉降情况。该测试同一批次同时进行。
3种颗粒丁酸钠与米糠混合后,立即在每个样品的上、中、下3个位点分别取样检测丁酸钠的含量。之后将样品直立经长途运输后(连城运至龙岩经山地国道来回一趟约200公里运输、该运输是同批次在一次测试中完成的),再分别从上、中、下3个位点分别取样丁酸钠的含量。检测结果如表2所示:
表2 沉降测试结果
Figure PCTCN2022082916-appb-000006
Figure PCTCN2022082916-appb-000007
如表2结果所示,实施例1制备的丁酸钠颗粒,经过运输之后,上、中、下各层中的丁酸钠颗粒几乎不发生沉降;而条形丁酸钠上、中、下各层均发生明显沉降,光滑球形丁酸钠也发生明显沉降,尤其在中层和下层更加明显。
鉴于可以应用所公开的发明的原理的许多可能的实施例,应当认识到,所示的实施例仅是本公开的优选示例,而不应视为限制本公开的范围。相反,本公开的范围由所附权利要求书限定。因此,我们要求保护所有落入这些权利要求的范围和精神内的发明。

Claims (14)

  1. 一种丁酸盐类添加剂的制备方法,其特征在于包含以下步骤:
    向流化床提供晶核和丁酸盐料液;采用循环流化结晶方式,形成丁酸盐颗粒。
  2. 如权利要求1所述的制备方法,其特征在于,所述晶核和所述丁酸盐为同种或不同种物质;
    优选地,所述的晶核为丁酸盐类的晶核;
    优选地,所述丁酸盐类选自丁酸钠、丁酸钾、丁酸钙或丁酸镁中的至少任意一种;
    优选地,所述流化在连续流化床中进行。
  3. 如权利要求1或2所述的制备方法,其特征在于,包括以下步骤:
    S1.提供晶核后向流化床内吹入热风;
    S2.喷入丁酸盐料液,颗粒长大;
    S3.持续对步骤S2制备的颗粒干燥;
    S4.将步骤S3制备的颗粒干燥。
  4. 如权利要求3所述的制备方法,其特征在于,所述步骤S1中,总进风风压为1000-2000pa,温度100-200℃;
    优选地,所述热风为分级的热风;
    优选地,所述热风从底部纵向依次吹入,进风温度100-280℃;优选为120-230℃;更优选140-200℃;
    优选地,料层风压差1000-3000pa,料层温度40-180℃;优选为料层风压差1500-2500pa,料层温度40-150℃;
    优选地,所述分级热风第1级140-180℃,第2级120-160℃,第3级100-140℃。
  5. 如权利要求3或4所述的制备方法,其特征在于,所述步骤S2中,分级喷入丁酸盐料液;
    优选地,所述丁酸盐料液的丁酸盐浓度为5-80%;
    优选地,所述丁酸盐料液的溶媒选自可溶的溶媒;
    优选地,所述丁酸盐料液的溶媒选自水、乙醇、异丙醇中的至少一种;
    优选地,所述丁酸盐料液的总喷入量为每小时100kg-10T;
    优选地,所述分级喷入丁酸盐料液的第1级喷入量为280-400kg/小时,第2级喷入量为280-380kg/小时,第3级喷入量为250-370kg/小时。
  6. 如权利要求3-5任一所述的制备方法,其特征在于,所述步骤S3中,脱水方式为热风干燥;
    优选地,所述热风干燥为分级热风干燥;
    优选地,分级热风干燥第1级140-180℃,第2级120-160℃,第3级100-140℃。
  7. 如权利要求3-6任一所述的制备方法,其特征在于,所述步骤S4中,干燥至液体含量0.1%-6%时流出流化床;
    优选地,干燥至液体含量0.5%-3%时流出流化床;
    优选地,干燥至液体含量1%-2.5%时流出流化床;
    优选地,干燥至液体含量2%时流出流化床。
  8. 如权利要求3-7任一所述的制备方法,其特征在于,所述制备方法还包括步骤S5.将步骤S4制备的颗粒按粒径分筛;
    优选地,所述步骤S5的粒径是无级调节的;
    优选地,所述步骤S5的粒径为10-120目;
    优选地,所述步骤S5的粒径为10-80目;
    优选地,所述步骤S1-S5是循环进行的。
  9. 一种丁酸盐类添加剂,其特征在于,是由权利要求1-8任一所述的制备方法制备的。
  10. 一种丁酸盐类添加剂,其特征在于,所述丁酸盐类添加剂呈颗粒状,具有由不止一个类球体附聚形成的结构,所述不止一个类球体之间具有针状晶体交织结构。
  11. 如权利要求10所述的丁酸盐类添加剂,其特征在于,所述丁酸盐类添加剂的粒径为10-120目;
    优选地,所述丁酸盐类添加剂的粒径为10-80目;
    优选地,所述类球体的粒径为0.05-1.0mm。
  12. 如权利要求1-8任一所述的制备方法,或权利要求9-10任一所述的丁酸盐类添加剂,其特征在于,所述添加剂为饲料添加剂。
  13. 一种饲料,其特征在于,包含如权利要求10-11任一所述的丁酸盐类添加剂;
    优选地,所述的饲料还包括基础日粮;
    优选地,所述基础日粮包含米糠、玉米、豆粕、麸皮中的至少一种。
  14. 如权利要求10-11任一所述的丁酸盐类添加剂,或权利要求13所述的饲料,其特征在于,所述丁酸盐类选自丁酸钠、丁酸钾、丁酸钙或丁酸镁中的至少任意一种。
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