Glass nutsche filters

BÜCHI AG

Glass vessel volume: 10 / 30 / 50 / 100 / 140 / 300 l 
Pressure: -1.0 (FV) to +0.5 / 1.0 bar 
Temperature: -60°C to +200°C 
Filter cloth: Mesh size 8 to 115 micron 
Material: Borosilicate glass 3.3 / PTFE / PFA / ETFE 
 
Customized setups are available 
 
A clean-room design (CRD) setup and other materials are available to meet your specific process requirements. 

Büchi nutsche filters can easily be combined with Büchi reactors for solid / liquid separation after the synthesis. The inert materials allow safe processing of a wide range of solvents and acids in an inert atmosphere and in a completely sealed glass system (büchiflex) under full vacuum. 

The slurry is transferred into the filter. The solid content in the slurry is held back by the filter cloth forming a filter cake, while the filtrate runs to the outlet valve in the bottom plate. The filtering stage finishes when the filtrate is of small quantity, which can be shortened by squeezing the filter cake by turning the height adjustable stirrer.  

The cake is removed easily from the top by opening the cover and lowering the glass filter vessel, which is fixed to the lifting device. The same lifting device is used to lower the bottom for accessing the filter cloth for cleaning and exchange. 

Standard Package: 

  • Glass filter vessel 
  • ETFE coated cover plate with ports for slurry feed, nitrogen, etc. 
  • PTFE bottom plate with filter cloth 
  • Mobile stainless steel frame with lifting device 
  • Highly corrosion resistant 
  • FDA-conform 
  • CGMP 
  • Complete documentation 

Options: 

  • Manual stirrer in stainless steel, Hastelloy or with inert coating 
  • ATEX stirrer drive with adjustable stirrer speed 
  • CIP capability 
  • Heating jacket (drying) 
  • IQ / OQ / PQ 

Typical Applications: 

  • Filtration / separation 
  • Drying  
  • Purification  
  • Crystallization  
  • Ion exchange  
  • Peptide synthesis  
  • Solid phase peptide synthesis (SPPS)  
  • Chromatography  
  • Cannabis extraction (solvent extraction)  
  • Cannabinoid extraction / cannabinoid-Extraction  
  • Cannabis extract purification 
  • Cannabis winterization (cannabis extract winterization) 

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