Kaiser Aluminum & Chemical, Oakland, said it completed the sale of most of its domestic agricultural chemicals business to S&P; Investments of Chicago . . . Menlo Park, Calif.-based Raychem Corp. said it plans to lay off 300 workers, representing about 3% of the firm's worldwide work force . . . Bethlehem Steel said it is asking shareholders to approve an increase in authorized common shares to 150 million from the current 80 million and to approve a new class of preference stock . . . Macmillan Inc. said it has agreed to acquire ITT Corp.'s publishing unit for undisclosed terms . . . Long Beach-based Southern California Pipeline System said it has acquired all permit rights and technical data relating to the Getty Oil Co. pipeline project that is designed to carry crude oil from Gaviota in Santa Barbara County to Emidio in Kern County.