High pressure reactor

Claim 1

A LARGE SIZE, REPLACEABLY LINED, PRESSURE VESSEL ADAPTABLE FOR CONDUCTING REACTIONS INVOLVING CORROSIVE FLUIDS AT ELEVATED PRESSURES AT TEMPERATURES, WHICH VESSEL COMPRISES IN COMBINATION: (1) A PRESSURE-RESISTANT OUTER SHELL HAVING A CYLINDRICAL PORTON AND HEAD PORTIONS AT EACH END OF SAID CYLINDRICAL PORTION, (A) SAID OUTER SHELL BEING CIRCUMFERENTIALLY DIVIDED INTO AT LEAST TWO SEGMENTS, (B) AT LEAST ONE OF SAID HEAD PORTIONS HAVING AN OPENING THEREIN; (2) A RELATIVELY-THIN CORROSION-RESISTANT LINER OF UNITARY CONSTRUCTION DISPOSABLE WITHIN SAID SHELL AND CONSTRUCTED OF A METAL REQUIRING HEAT TREATING AFTER EXTENSIVE WELDING, (A) SAID LINER COVERING ALL INTERNAL PORTONS OF SAID SHELL, (B) SAID LINER BEING INITIALLY LOOSE-FITTING WITH RESPECT TO SAID OUTER SHELL BUT EXPANSIBLE UNDER SERVICE CONDITIONS OF PRESSURE AND TEMPERATURE TO PROVIDE AN ABUTTING RELATIONSHIP WITH SAID SHELL, (C) SAID LINER HAVING A MASSIVE PRESSURE-RESISTING REINFORCING PORTION NEAR THE OUTER SHELL HEAD OPENING AND PROVIDING AN ATTACHMENT FOR AN EXTERNAL CONDUIT; (3) AND CONNECTING MEANS ADAPTED FOR NON-WELDED SEALING OF SAID MASSIVE REINFORCING PORTION TO AN EXTERNAL CONDUIT THROUGH SAID OUTER SHELL HEAD OPENING AFTER INSERTION OF SAID LINER INTO SAID SHELL.