Patent ID: 8071508

Claim:
A process for preparing a paste-extruded sulfonamide herbicide composition comprising (a) preparing a mixture comprising (i) from 2 to 90% by weight on a water-free basis of one or more active ingredients comprising at least one sulfonamide herbicide free acid; (ii) from 0 to 95% by weight on a water-free basis of one or more additives selected from the group consisting of wetting agents, dispersants, lubricants, anticaking agents, chemical stabilizers and diluents; and (iii) at least about 50 equivalent % of base selected from inorganic base equivalents having conjugate acid pK a s at least 2.1 units greater than the highest pK a of the sulfonamide herbicide free acid component; the sum of the weight percents of all the ingredients in the mixture totaling 100% on a water-free basis; and (iv) sufficient water to make the mixture an extrudable paste; (b) extruding the mixture prepared in (a) through a die or screen to form extrudate; and (c) drying the extrudate.