| 摘要 |
PROBLEM TO BE SOLVED: To obtain a water-based detergent and to provide a cleaning method using the same, improved in adaptability to oil kind so as to be adaptable to broader range of oil kinds. SOLUTION: This water-based detergent is obtained by blending a cationic surfactant in a detergent consisting manly of a nonionic surfactant and a builder which is an inorganic salt with its valence of 1:1 type such as NaCl, NaHCO3 or KBr. The proportion of the builder to be blended is pref. 0.05-2.0 (esp. 0.2-0.8)mol per L of the final detergent. The objective cleaning method is such method that a cleaning liquid is prepared by diluting this detergent with water, and a used cleaning liquid contaminated with oil-and-fat is heated to a temperature higher than the cloud point of this detergent to allow the oil-and-fat in the used cleaning liquid to float up and separate it from the liquid. |
