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191 spray dryer

Manufactured by Büchi
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The Büchi 191 spray dryer is a laboratory-scale equipment designed for the drying of liquid samples. It features a drying chamber, an air heater, and a cyclone separator to collect the dried product. The 191 spray dryer can be used to process various types of liquid samples, such as solutions, suspensions, or emulsions, into dry powders or granules.

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Mini Spray Dryer B-191 (22 citations) Mini Spray Dryer 191 (3 citations)

3 protocols using 191 spray dryer

1

Spray Drying of UC-CPN Suspension

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In total, 4 mg of UC-CPNs were suspended in 0.2 mL of Milli-Q water.
The resulting suspension was then mixed with 2 mL of a 10 wt % PVA
4–88 solution while stirring to improve the dispersion. The
mixture was sprayed through an adapted spray dryer (Buchi 191 spray
dryer) onto a glass slide kept at a distance of 16 cm from the nozzle
and using a prepatterned mask.
Zhang J., Ruiz-Molina D., Novio F, & Roscini C. (2023). Water-Stable Upconverting Coordination Polymer Nanoparticles for Transparent Films and Anticounterfeiting Patterns with Air-Stable Upconversion. ACS Applied Materials & Interfaces, 15(6), 8377-8386.
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2

Mechano-Fusion Composite Active Particles

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Example 5

Micronised glycopyrrolate and homogenised magnesium stearate (as described in Example 4) were combined in a weight ratio of 75:25. This blend (−20 g) was then milled in the Mechano-Fusion AMS-Mini system as follows. The powder was pre-mixed for 5 minutes at −900 rpm. The machine speed was then increased to −4,800 rpm for 30 minutes. During the milling treatment the Mechano-Fusion machine was run with a 3 mm clearance between element and vessel wall, and with cooling water applied. The powder of composite active particles was then recovered from the drum vessel.

The experiment was repeated using the same procedure but the active particle and homogenised magnesium stearate were 15 combined in the ratio 95:5, and milled for 60 minutes at 4,800 rpm.

This above process was repeated using the same procedure with a sample of sodium salicilate as a model drug and homogenised magnesium stearate in the ratio 90:10, where the sodium salicilate had been produced as approximately micron sized spheres by spray drying from a Buchi 191 spray dryer. It was believed that the spherical shape of these particles may be advantageous in the coating process. Milling was for 30 minutes at 4,800 rpm

US10973771B2. Method of making particles for use in a pharmaceutical composition (2021-04-13). VECTURA LIMITED [GB]. Inventors: John Nicholas Staniforth [GB], Matthew Michael Green [GB], David Alexander Vodden Morton [GB].
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3

Micronized Glycopyrrolate and Magnesium Stearate Composites

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EXAMPLE 5

Micronised glycopyrrolate and homogenised magnesium stearate (as described in Example 4) were combined in a weight ratio of 75:25. This blend (−20 g) was then milled in the Mechano-Fusion AMS-Mini system as follows. The powder was pre-mixed for 5 minutes at −900 rpm. The machine speed was then increased to −4,800 rpm for 30 minutes. During the milling treatment the Mechano-Fusion machine was run with a 3 mm clearance between element and vessel wall, and with cooling water applied. The powder of composite active particles was then recovered from the drum vessel.

The experiment was repeated using the same procedure but the active particle and homogenised magnesium stearate were combined in the ratio 95:5, and milled for 60 minutes at 4,800 rpm.

This above process was repeated using the same procedure with a sample of sodium salicilate as a model drug and homogenised magnesium stearate in the ratio 90:10, where the sodium salicilate had been produced as approximately micron sized spheres by spray drying from a Buchi 191 spray dryer. It was believed that the spherical shape of these particles may be advantageous in the coating process. Milling was for 30 minutes at 4,800 rpm.

US09931304B2. Method of making particles for use in a pharmaceutical composition (2018-04-03). VECTURA LIMITED [GB]. Inventors: John Nicholas Staniforth [GB], Matthew Michael Green [GB], David Alexander Vodden Morton [GB].
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