| abstract |
There is disclosed a process for preparation of improved zeolites such as zeolite A having increased ion exchange capacities, and improved usefulness in detergent and water purification applications, which comprises reaction of a calcined clay under conditions of high shear in contact with a portion of an alkali metal hydroxide solution, thereafter gradually increasing the temperature of the resulting mixture while adding the additional amount of alkali metal hydroxide solution under conditions of high shear, and recovering the zeolite product. Also disclosed is a process for addition of an iron complexing agent to the mixture to improve color of the final product. |