PROBLEM TO BE SOLVED: To provide a desiccant raw material which can be completely restrained from reacting with water and has enhanced safety and to provide a method for manufacturing the desiccant raw material.SOLUTION: A method for manufacturing the desiccant raw material comprises the steps of: mixing a calcined lime particle 11 with a higher fatty acid 12 to form such a primary particle 10 that the whole surface of the calcined lime particle 11 is covered with the higher fatty acid 12 granulating the primary particle to form such a secondary particle 20 that the primary particles 10 are coagulated while using the higher fatty acid 12 as a binder and coating the whole surface of the secondary particle 20 completely with the higher fatty acid 12 to improve the water repellency. The possibility that the calcined lime particle 11 is in contact with water is made extremely low and is restrained from reacting with water. The amount of the higher fatty acid 12 to be added to the calcine lime particle 11 is preferably adjusted to 6-17 mass%, for example.COPYRIGHT: (C)2009,JPO&INPIT【課題】水との反応を完全に抑えることができ、安全性を高めることができる乾燥剤原料およびその製造方法を提供する。【解決手段】生石灰粒子11と高級脂肪酸12とを混合することにより、生石灰粒子11の表面全部を高級脂肪酸12により被覆した一次粒子10を形成したのち、造粒により、一次粒子10が高級脂肪酸12を結着剤として凝集した二次粒子20を形成する。二次粒子20の表面全体を高級脂肪酸12で完全にコーティングし、撥水性を向上させる。生石灰粒子11に水分が接触する可能性を極めて小さくし、水との反応を抑える。高級脂肪酸12の生石灰粒子11に対する添加量は例えば6質量%以上17質量%以下とすることが好ましい。【選択図】図3
