The function of surfactant in green detergent

2020-03-16 14:16:48

Green detergent is the development direction and the general trend. It is the historical mission of daily chemical industry and the lofty responsibility of engineers and entrepreneurs to develop and promote green detergent for the benefit of the country and the people. The development of green detergents may not be in harmony with the immediate economic benefits, but it should be focused on sustainable development and future generations. On the other hand, the government should encourage the development of green detergents, and give preference to tax policies and scientific and technological funds. In addition, the daily chemical industry should vigorously promote the advantages of green detergent through various channels, and actively guide green consumption.

In synthetic detergents, detergents usually soften the hardness of water and improve the acidity and alkalinity of washing solution, and the amount of them is generally large; the amount of additives is small, a is used to call it "small material". Most of the detergents are used in washing powder, and the amount of additives in liquid washing is very limited, except for structural liquid washing. STPP (sodium tripolyphosphate) is an incomparable detergent aid because of its comprehensive properties. However, STPP can not be used as the surface active agent of green detergent because it is a phosphorus containing additive, which will aggravate the eutrophication of closed water to a certain extent.

Polycarboxylate can effectively improve the ability of anti redeposition and anti ash of washing powder. The contribution of polycarboxylate to detergency is better than that of CMC. However, polycarboxylate is not easy to be biodegraded, so its pollution to soil can not be ignored. NTA and EDTA have excellent soft water ability, but NTA has potential carcinogenicity, while EDTA has poor biodegradability. Therefore, polycarboxylate, NTA and EDTA should be avoided in green detergents.

Layered sodium disilicate, 4A zeolite, sodium gluconate and sodium citrate can be used as detergent aids. The new green chelating agents IDS (Iminodisuccinic acid), EDDS (Ethylenediaminedisuccinic acid) and glda (sodium glutamate diacetate) are also good choices for green detergents. Enzyme is an important additive of detergent. The detergent added with enzyme agent can not only effectively wash out special stains (such as milk stains, sweat stains, blood stains, oil stains, vegetable juice stains, etc.), but also save surfactant, reduce washing temperature and water consumption, reduce waste discharge, which is of great significance for energy conservation and environmental protection. It is a real green assistant. Although the unit price of enzyme preparation is expensive, the dosage is low, the effect is good, and the cost performance is high.

The stability of enzyme preparation in liquid washing is not ideal, but it is quite good in washing powder. It is a good thing for the country and the people to use enzyme preparation in detergent. The daily chemical industry should vigorously advocate and actively promote the application of enzyme preparation in detergent, especially in washing powder.