Odorless benzoic acid process
AssigneeBayer Aktiengesellschaft
InventorsWilhelm Wolf, Meinhard Puhl
Life of this patent
Estimating the term…
Abstract
Odorless benzoic acid is prepared by treating benzoic acid, after crystallization, with an inert gas at temperatures in the range of 50.degree.-100.degree. C. The process is best carried out using benzoic acid crystals or particles having a particle size of less than 1 mm in a moving or fluidized bed.
Claims10
Process for making substantially odourless benzoic acid which consists essentially of spray drying benzoic acid contaminated with diphenyl to obtain substantially spherical crystals of said benzoic acid and thereafter passing an inert gas selected from the group consisting of nitrogen, carbon dioxide, a noble gas or air having an oxygen content of less than 8% by volume or a mixture thereof at a temperature of 50.degree.-100.degree. C. through said benzoic acid spherical crystals contaminated with diphenyls.
Dependencies are inferred from the claim text.