Process for producing a gel-like composition of a high polymer of acetylene, and process for molding said composition

A process for producing a porous acetylene high polymer, which comprises lyophilizing a gel-like composition composed of 1 part by weight of an acetylene high homopolymer having a fibril structure and 1 to 1,000 parts by weight of an organic solvent, said gel-like composition being a member selected from the group consisting of (1) a product prepared by polymerizing acetylene in a polymerization solvent containing a catalyst system composed of (A) a transition metal compound containing at least one transition metal selected from transition metals of Groups IVa, Va, VIa and VIII of the periodic table and (B) an organometallic compound containing at least one metal selected from metals of Groups IIa, IIb, IIIb and IVb of the periodic table, the concentration of the transition metal compound being 0.0001 to 0.1 mole per liter of the polymerization solvent, and (2) a product in which all or a major portion of the polymerization solvent in the product of said (1) is replaced by an organic solvent having a freezing point of -50.degree. to 50.degree. C.