Abstract In the polymerization under pressure of liquid olefin to polyolefin using a Ziegler type catalyst in which the reaction mass, comprising a mixture of catalyst and polyolefin dissolved in liquid monomer, is mixed in a mixer with water to kill the catalyst and reaction after which the highly corrosive aqueous solution of Ziegler catalyst is separated from the monomer and dissolved polymer in a settling tank; lining the inner wall of the mixer and/or settling tank and/or any other part of the equipment coming into contact with the aqueous Ziegler catalyst solution with an acid resistant brick lining having an intermediate membrane lining between it and such inner wall and in which the mortar of the brick lining is a carbon-filled furan polymer, in which the membrane is a fiber glass reinforced furan polymer and in which the brick lining is cemented to the membrane and the membrane is cemented to the inner wall by a carbon-filled furan polymer adhesive.
A method of polymerizing olefins from liquid olefin monomer with a Ziegler type catalyst under positive pressure, in which the reaction mass comprises catalyst and polyolefin dissolved in liquid monomer and is mixed with water in a mixer to halt the reaction and in which the water with catalyst dissolved therein is separated from the reaction mass in a settling tank, and in which at least one of the mixer and settling tank comprises an outer shell the inner wall of which has a lining resistant to said aqueous solution of Ziegler catalyst and to said polyolefin-in-monomer solution, said lining comprising a layer of acid resistant bricks and an intermediate membrane between said layer of bricks and said inner wall, said bricks being mortared together and to said membrane and said membrane being cemented to said inner wall of said shell by a furan polymer cement and said membrane comprising a furan polymer.
Claim 2
Independent Claim
153 words
A method of polymerizing olefins from liquid olefin monomer with a Ziegler type catalyst under positive pressure, in which the reaction mass comprises catalyst and polyolefin dissolved in liquid monomer and is mixed with water in a mixer to halt the reaction and in which the water with catalyst dissolved therein is separated from the reaction mass in a settling tank, and in which at least one of the mixer and settling tank comprises an outer shell the inner wall of which has a lining resistant to said aqueous solution of Ziegler catalyst and to said polyolefin-in-monomer solution, said lining comprising a layer of acid resistant bricks and an intermediate membrane between said layer of bricks and said inner wall, said bricks being mortared together and to said membrane and said membrane being cemented to said inner wall of said shell by a furan polymer cement and said membrane comprising a furan polymer.
Claim 3
Dependent Claim
24 words
A method according to claim 1, said furan polymer cement containing a particulate inert filler and said membrane being reinforced by acid inert fibers.
Claim 4
Dependent Claim
22 words
A method according to claim 1, said furan polymer being filled with carbon black and said membrane being reinforced with glass fibers.