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US 4,055,617 AGranted
Process for preparing granular potassium sorbate
AssigneeNippon Gohsei Kagaku Kogyo Kabushiki Kaisha
InventorsYasuyoshi Taga, Masaharu Wakasone
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Abstract
A process for preparing granular potassium sorbate by adding water or a mixture of water and an organic solvent to powdery potassium sorbate, kneading the resulting mixture under specific conditions to give a uniformly wetted powder, supplying the wetted powder to a screw type extruding machine, extruding the wetted powder through a perforated-cylinder die under specific conditions to give a vermicelli-like extrudate, and drying the extrudate.
Claims2
A process for preparing granular potassium sorbate, which comprises the steps of
- a. adding water to powdery potassium sorbate in an amount of 2 to 8% by weight based on the weight of the potassium sorbate,
- b. kneading the resulting mixture at a temperature of 10.degree. to 45.degree. C. for 10 minutes to 4 hours to give a uniformly wetted powder,
- c. supplying the wetted powder to a hopper of a screw type extruding machine equipped with a perforated cylinder die at a vicinity of an end of a screw, and extruding it under an extruding pressure at said die of 10 to 50 kg./cm.sup.2., and an extruding rate at said die of 1 to 4 g./cm.sup.2.sec. to give a vermicelli-like extrudate, and
- d. drying the extrudate to give granules having a volatile material content of not more than 0.1% by weight.
1 more element
Dependencies are inferred from the claim text.