| abstract |
A cleaning composition comprising a crude extract of rice bran enzyme, a surfactant and a preservative, wherein the crude extract of rice bran enzyme is prepared by the following steps: providing rice bran and an enzyme extraction solution; mixing the rice bran and the enzyme extraction solution in the ration of 1: 8 to 1 : 2 and then stirring and centrifuging to obtain a rice bran lipase enzyme extract; gradually adding ammonium sulfate to the rice bran lipase enzyme extract, and continue stirring to obtain a rice bran lipase enzyme solution; and adding aqueous alcohol solution to the rice bran lipase enzyme solution, after stirring and standing, centrifuging or gravity sedimenting to obtain the crude extract of rice bran enzyme. A cleaning method includes the step of contacting the above cleaning composition with clothing to be cleaned. |