Potassium sorbate granule and preparation process thereof


Application Number: 00108924
Application Date: 2000.05.17
Publication Number: 1275560
Publication Date: 2000.12.06
Priority Information: 1999/5/18 JP 137749/99
International: C07C57/10;C07C51/43
Applicant(s) Name: Daicel Chemical Industries, Ltd.
Address:
Inventor(s) Name: Kono Matsuhiro;Okada Seishi;Matsuoka Ichiyuki
Patent Agency Code: 11105
Patent Agent: wu xiaonan
Abstract A granulated product of potassium sorbate has an overall pore volume of 0.3 ml/g or less, has an Na content of 450 ppm or less, or has an overall pore volume of 0.4 ml/g or less, or a granule hardness of 15% or less, and an Na content of 1000 ppm or less. The granulated product is obtained, for example, by granulating a potassium sorbate aqueous solution through fluidized bed granulation drying, by neutralizing sorbic acid with a potassium sorbate having a molar ratio of Na to K (Na/K) of 0.0024 or less to yield potassium sorbate, and granulating the potassium sorbate, or by neutralizing sorbic acid with a potassium sorbate having a molar ratio of Na to K (Na/K) of 0.006 or less to yield potassium sorbate, and moisture-conditioning 100 parts by weight of the potassium sorbate with 1 to 8.5 parts by weight of water and 1 to 8 parts by weight of a water-soluble organic solvent and subjecting the resulting mixture to extrusion granulation. The granulated product of potassium sorbate has a highly stable hue over time.