B 290 laboratory spray dryer

Manufactured by Büchi

The B-290 laboratory spray dryer is a versatile piece of equipment designed for the drying of liquids and suspensions. It utilizes a spray drying process to transform liquid samples into dry powder or granular products. The B-290 is capable of handling a variety of feed materials and can be used in a range of applications within the laboratory setting.

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Lab products found in correlation

Ultraturrax t18, by IKA Group (1 mentions)

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B-290 (120 citations) B-290 spray dryer (17 citations) Büchi 290 spray dryer (7 citations)

6 protocols using b 290 laboratory spray dryer

Spray-Dried Amorphous Propellant Formulation

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Example 4

An amorphous propellant consisting of 60 wt % CL-20, 20 wt % HMX, and 20 wt % cellulose acetate (CA) 30,000 MW, was prepared by spray drying an acetone solution containing 6 wt % CL-20, 2 wt % HMX, and 2 wt % CA. The solution was spray dried with a Buchi, model B-290 laboratory spray dryer. The solution was atomized using a two-fluid pneumatic nozzle (Model 044698, Buchi) with nitrogen as the atomizing gas. The inlet drying gas temperature was set to 95° C., with a flow rate of 35 m m³/hr. The solution feed rate was set to 5 ml/min. The product was separated from the gas stream with a cyclone separator. The collected material was analyzed by powder X-ray diffraction. The powder pattern showed a broad halo-like pattern with no sharp peaks, suggesting the material is completely amorphous.

While the present invention was described using certain exemplary, specific embodiments, those skilled in the art will recognize that the teachings presented herein are not limited to these specific embodiments. The preferred embodiments of the invention are provided for the purpose of explaining the principles of the present invention and its practical applications, thereby enabling others skilled in the art to understand the invention. Various embodiments and modifications are contemplated within the scope of the present invention.

US10703687B1. Amorphous energetics (2020-07-07). U.S. Government as Represented by the Secretary of the Army [US]. Inventors: Victor Stepanov [US], Rajen Patel [US], Chris Pizzo [US], Alexander Paraskos [US], Ruslan Mudryy [US], Hongwei Qiu [US].

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Production of High-Performance Carbon Powder

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Example 1

30 g of ammonium lignosulfonate were dissolved in 600 mL of deionized water while stirring vigorously with a dissolver disc. 200 g of coke precursor 1 (properties listed in Table 1 below) were slowly added, followed by further mixing for 2 h. This dispersion was spray-dried using a Büchi B-290 laboratory spray dryer, using a 2-fluid nozzle in co-current mode with an inlet temperature of 170° C. and an air gas flow rate of 700 L/h, resulting in a carbonaceous powder that was collected in the product collection vessel attached to the cyclone. In a glass tube carbonization oven, this powder was heated to 450° C. under a nitrogen atmosphere over the course of 1 h, followed by further treatment at 450° C. for 1 h. Heat treatment in an argon atmosphere (ramp up to 2,000° C.: 10° C./min, ramp from 2,000-3,000° C.: 5° C./min, followed by 4 h at 3,000° C.) resulted in carbon powder 4 (see Table 2).

US10637058B2. Carbonaceous composite materials with snowball-like morphology (2020-04-28). ImerTech SAS [FR]. Inventors: Michael Spahr [CH], Pirmin Ulmann [CH], Simone Zürcher [CH], Sergio Pacheco Benito [CH], Hiroyuki Taki [JP].

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Limonene-Loaded Microcapsules: Formulation and Spray Drying

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Limonene loaded microcapsules were prepared as described previously (14 (link)). An emulsion of 1.2:1 (w/w) gelatin:limonene with a small amount of anti-foam reagent was prepared by first using an Ultra-Turrax T-18 (IKA Works, Inc., Wilmington, DE, United States) at 12,000 rpm for 2 min then three passes through a high-pressure homogenizer (BEEi Nano DeBEE 30-4 High Pressure Homogenizer) at 20 kpsi. A CoCo solution containing gelatin, alginate and succinic acid was prepared, where ammonium hydroxide was used to adjust the solution pH to 8.5. Tributyl citrate was added to the Aquacoat^® ECD 30 dispersion (referred to as EC dispersion) at 25% of the mass of ethylcellulose, and rotated at 20 rpm overnight before adding to the CoCo’ solution. The emulsion and the CoCo solution with or without EC dispersion were mixed to form the spray drying feed. Table 1 shows the composition of each formulation. The feed was spray dried by a Buchi B290 laboratory spray dryer using the following conditions: 150°C inlet air temperature, 35 m³/h aspirator airflow rate, 6 ml/min feed peristaltic pump (20% of maximum), and 40 mm nozzle pressure.

Tang Y., Park H., Scher H.B, & Jeoh T. (2022). The role of a moisture-barrier latex in controlling retention, stability and release of D-limonene from complex coacervated matrix microparticles formed during spray drying. Frontiers in Nutrition, 9, 979656.

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Synthesis of Carbon Powders via Spray Drying

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Example 2

30 g of ammonium lignosulfonate were dissolved in 600 mL of deionized water while stirring vigorously with a dissolver disc. 200 g of coke precursor 2 (properties listed in Table 1 below) were slowly added, followed by further mixing for 2 h. This dispersion was spray-dried using a Büchi B-290 laboratory spray dryer, using a 2-fluid nozzle in co-current mode with an inlet temperature of 170° C. and an air gas flow rate of 700 L/h, resulting in a carbonaceous powder that was collected in the product collection vessel attached to the cyclone. In a glass tube carbonization oven, this powder was heated to 450° C. under a nitrogen atmosphere over the course of 1 h, followed by further treatment at 450° C. for 1 h. Heat treatment in an argon atmosphere (ramp up to 2,000° C.: 10° C./min, ramp from 2,000-3,000° C.: 5° C./min, followed by 4 h at 3,000° C.) resulted in carbon powder 6 (see Table 2). Alternatively, heat treatment after carbonization at 450° C. in an argon atmosphere (ramp up to 1,800° C.: 10° C./min, followed by 4 h at 1,800° C.) resulted in carbon intermediate 5 (see Table 2).

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Preparation of Dry Cross-linked Alginate Microcapsules

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Dry cross-linked alginate microcapsules (CLAMs) were prepared by spray-drying a well-mixed suspension of 2.0% (w/w) sodium alginate, 1.0% (w/w) succinic acid (adjusted to pH 5.6 with ammonium hydroxide), and insoluble calcium phosphate dibasic dihydrate. To achieve different extents of calcium alginate cross-linking, the concentration of calcium phosphate dibasic dihydrate in the spray-dryer inlet suspension was either 0.5% or 0.1% (w/w). The microorganism pellet was dispersed in this inlet suspension, which was subsequently pumped into a Buchi B290 laboratory spray-dryer (New Castle, DE) to produce dry, bacteria-loaded microcapsules. All formulations were prepared under identical operating conditions: inlet air temperature was set to 130°C, aspirator airflow rate was set to maximum (35 m³/h), peristaltic pump was set to 45% of maximum, and nozzle air flow was set to 50 mm on the Q-flow indicator. Under these conditions, the outlet temperatures ranged from 49–53°C. Triplicate lots of each powder (0.1% and 0.5% CaHPO₄) were prepared and analyzed in triplicate. Spray dried powders were stored at room temperature in clear glass vials, with exposure to ambient light.

Strobel S.A., Allen K., Roberts C., Jimenez D., Scher H.B, & Jeoh T. (2018). Industrially-Scalable Microencapsulation of Plant Beneficial Bacteria in Dry Cross-Linked Alginate Matrix. Industrial Biotechnology, 14(3), 138-147.

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Carbonization of Ammonium Lignosulfonate-Based Coke Precursor

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Example 3

30 g of ammonium lignosulfonate were dissolved in 600 mL of deionized water while stirring vigorously with a dissolver disc. 200 g of coke precursor 3 (properties listed in Table 1 below) were slowly added, followed by further mixing for 2 h. This dispersion was spray-dried using a Büchi B-290 laboratory spray dryer, using a 2-fluid nozzle in co-current mode with an inlet temperature of 170° C. and an air gas flow rate of 700 L/h, resulting in a carbonaceous powder that was collected in the product collection vessel attached to the cyclone. In a glass tube carbonization oven, this powder was heated to 450° C. under a nitrogen atmosphere over the course of 1 h, followed by further treatment at 450° C. for 1 h. Heat treatment in an argon atmosphere (ramp up to 2,000° C.: 10° C./min, ramp from 2,000-3,000° C.: 5° C./min, followed by 4 h at 3,000° C.) resulted in carbon powder 7 (see Table 2).

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