Studies On The Production Of Non-phosphate Laundry Powder Through The Use Of The Drainage Oil In The Catering Industry

Underground drainage oil involving the catering industry is previously called the natural oil, which is the mixture of animal fat and vegetable oil. The use of drainage oil for the production of non-phosphate washing detergent through the process of direct saponification is turned out to be a high quality material which is cheap and rare to come by. Evidence shows that detergent products made from the natural animal and vegetable oil are likely to be more compatible with the environment and to be more biologically degraded compared with the chemical composed detergents. Similarly, the environment hazard is less severe than the composed surfactants. As a result, research conducted in this field is of great significance to the environment protection and for the benefits of the society, meanwhile, the turning of the waste oil into industrial material itself is said to have relatively high economic benefits.By applying the orthogonal experimental methods to the compound property and result study of the soap substance from the process of hydrolysis saponification of the sewerage oil and the surface active agents as well as the builders, the author selects the non-phosphate powder detergent formula and conducts a series of tests relating to the properties of the optimal formulas with laundry powder. The results show that the property of the optimal formula equals the washing powder in the market and is up to the national standard.Researches on the anti re-deposition effects of the anti re-deposition agents applied in the optimal formulas are conducted by adopting the cycled washing contrast method. Tests show that carboxyl methyl cellulose (CMC) has noticeable anti-smear deposition effects on the cotton cloth and cotton blended cloth. Of all the optimal formulas, CMC is fairly effective to the re-deposition resistance at the content of0.8%-1.5%.By applying the tests of detergency in the varying temperatures, the writerinvestigates the relationship between the properties of the optimal formulas and the temperatures of various degrees. The results indicates that the surface tension of the optimal formulas decreases remarkably as the temperature rises and the moisture absorption is greater than that of the standard laundry powder. The increase in temperature enhances its power of detergency. Excellent detersive power is seen when 0.6% of alkali protease content is added into the optimal formulas to clean away the protein smear.Studies on the cleansing property in the laundry powder by using the derivative of glycerin from the drainage oil saponification through the application of the detergency tests are also carried out. Glycerin and the surfactants in the optimal formulas have noticeable washing performance in terms of joint enhancing effects. The appropriate ratio of glycerin content is 6%-10%. As a result, glycerin from the process of hydrolysis saponification of the waste oil can be directly used in the laundry powder without any separations.