Patent ID: 8062606

Claim:
A coated reactor comprising an inner metal wall and a fluoropolymer coating having a thickness of from about 1 to 10 mm anchored to said inner metal wall by direct physical attachment to both (a) a perforated metal sheet having a thickness of from about 1 to 10 mm and perforation openings covering from about 10 to 50% of the total surface area of said perforated metal sheet located between the inner metal wall and the fluoropolymer coating; and (b) said inner metal wall by extending through said perforations wherein a face of said perforated metal sheet is in contact with the inner metal wall of the reactor and having sufficient roughness to form a free space for gases between it said perforated metal sheet and the inner metal wall of the reactor; and means to maintain the pressure in the free space below the pressure in the reactor.