semichemical pulping

semichemical pulping

[¦sem·i′kem·ə·kəl ′pəlp·iŋ] (chemical engineering) A method of producing wood-fiber products in which the wood chips are merely softened by chemical treatment (neutral sodium sulfite solution), while the remainder of the pulping action is supplied by a disk attrition mill or by some similar mechanical device for separating the fibers.