Aakash Chemicals & Dye-Stuffs, Inc. announced that Peter W. Stewart has been named vice president – specialty chemicals. Mr. Stewart most recently directed the amide and stearate businesses of Crompton Corporation. He also served as business manager – fatty acid derivatives at Witco Corporation.      Mr. Stewart’s 27 years of experience in plastic additives also include serving the thermoplastic additives for Ampacet Corporation and 14 years in various technical positions at Ciba Specialt...