Polyarylene sulfide, and purification method and production method therefor

A purification method for a polyarylene sulfide, comprising:

• a step (1) of obtaining a mixture containing a crude polyarylene sulfide by removing a solvent from a crude reaction product containing a polyarylene sulfide obtained by reacting a polyhalo aromatic compound with a sulfidizing agent in an organic polar solvent;
• a step (2) of purifying the mixture containing the crude polyarylene sulfide to convert the crude polyarylene sulfide into porous particles having a specific surface area in a range of 30 [m2/g] or more;
• and
• a step (3) of bringing the obtained polyarylene sulfide porous particles into contact with carbonated water, wherein
• the step (2) includes a step of performing a step (2Ss) of bringing the mixture containing the crude polyarylene sulfide into contact with an oxygen atom-containing solvent having 1 to 3 carbon atoms and a step (2Sw) of bringing the mixture containing the crude polyarylene sulfide into contact with water each for at least once, and
• a ratio of a compound (1) represented by the following structural formula (1) contained in the porous particles after the step (3) is in a range of 1100 [ppm] to 3000 [ppm] or less,
• in the formula, Ar represents an aryl group having a halogen atom, R1 represents a hydrogen atom, an alkyl group having 1 to 3 carbon atoms, or a cyclohexyl group, R2 represents an alkylene group having 3 to 5 carbon atoms, and X represents a hydrogen atom or an alkali metal atom.