Corrosion protection by PTFE lining
Table of Contents
One of the most special features of Berghof reactors is their unique, thick-walled TFM™-PTFE lining. All parts that come into contact with liquids are either made entirely of TFM™-PTFE or coated with fluoropolymer.
Advantages of TFM™-PTFE lining:
- High annealing resistance, briefly up to +260 °C
- Pressure resistant up to 200 bar
- Universal chemical resistance, even to aggressive acids and bases
- Corrosion resistant
Tip: The PTFE inserts can also be used as practical storage vessels for reaction solutions or reserved for different catalyst types. The question of whether the observed catalysis effects are actually due to the catalyst changes, carry-over effects or catalyst poisoning is elegantly circumvented.
Berghof reactors are universally applicable - all parts that come into contact with liquid phase are protected against chemical attack by fluoropolymers. The lining is hermetically sealed and nestles against the reactor wall like a skin from the inside. It differs significantly from PTFE inserts that are placed openly in the reactor.The complete lining consists of a removable PTFE insert, the lid lining, the immersion tube or agitator jackets and the PTFE sealing rings. All these parts can be easily removed and reassembled for cleaning purposes.
A thick-walled TFM™ PTFE lining several millimeters thick efficiently protects the stainless steel reactor against corrosion, even with corrosive media such as acids and bases. PTFE is characterized by its outstanding chemical resistance to almost all chemicals and thus makes it possible to dispense with much more expensive special alloys such as Hastelloy. This significantly reduces acquisition costs. The risk of possible cross-contamination is also easily controlled with inserts made of PTFE. Metallic catalysts such as Pt, Rh, Raney nickel, etc. adhere to steel reactors and are difficult to remove. In subsequent tests, the question then always arises as to whether the observed effects are actually due to the catalyst change, carryover effects or catalyst poisoning.