Process for the inhibition of the formation of deposits in cellulose pulping and cellulose pulp treating processes

A process for inhibiting the formation of deposits in cyclic cellulose pulping or cellulose pulp treating processes in which chemicals are recovered from spent liquors and recycled, thereby reducing the need for shutdown of equipment for cleaning, which comprises carrying out the cellulose pulping or cellulose pulp treating in a liquor having dissolved therein an amount within the range from about 0.001% to about 0.15% by weight of the dry lignocellulosic material of aluminum cation capable of forming liquor-soluble complexes with deposit-forming anions and thus retaining the deposit-forming anions in solution in the cellulose pulping or cellulose pulp treating liquor and inhibiting the formation of deposits at every stage of the cyclic process in which such deposits may form, including the chemicals recovery stage by maintaining said aluminum cation in said range throughout the cyclic process.