Abstract: A process for producing a conductive polyaniline is disclosed. The process includes mixing an aniline monomer, a water-immiscible organic solvent, at least one protonic acid doping agent and water together to form an emulsion via agitation, stopping agitation to allow the emulsion to separate into an aqueous phase and a non-aqueous phase, separating the non-aqueous phase from the aqueous phase, and adding an oxidation agent into the non-aqueous phase to carry out polymerization. A non-aqueous in-situ formed transparent polyaniline solution prepared by the process is also disclosed.

Abstract: A process for doping polyaniline powder includes: mixing a drying agent with a dopant selected from the group consisting of alkyl sulfuric acid, alkyl sulfonic acid and alkyl benzene sulfonic acid so as to remove water contained in the dopant; and blending the dried dopant and the polyaniline powder in the presence of an additive which is selected from the group consisting of phosphoric acid, hydrochloric acid, nitric acid and acetic acid in order to form a doped product.

Abstract: A wastewater-recyclable polymerization process for producing a polyaniline-based resin includes: feeding into a reactor an aniline monomer, an acid solution and an oxidizing agent to undergo polymerization so as to produce polyaniline resin particles; filtering the polyaniline resin particles from an acidic aqueous solution formed during the polymerization; neutralizing and drying the polyaniline resin particles to form a powder; recycling the acidic aqueous solution by mixing the acidic aqueous solution in the reactor with a fresh reactant feed which contains the aniline monomer, the acid solution and the oxidizing agent; and permitting the reactant feed to undergo polymerization in the presence of the recycled acidic aqueous solution at room temperature without cooling the reactor.