The fatty acid methyl ester ethoxylate sulfonate FMES product contains a large amount of phosphorus, with a total phosphorus content of up to 5500ppm. The extensive use of FMES results in wastewater phosphorus content exceeding the national discharge standards. In the "Emission Standards for Water Pollutants in Textile Dyeing and Finishing Industry" formulated by the Hangzhou Environmental Protection Bureau, the emission concentration of total phosphorus is limited to 0.5 ppm, and the phosphorus content of FMES exceeds 11000 times.
With the increasing demand for environmental protection in various regions, the use of FMES not only brings great trouble to wastewater discharge. On the other hand, FMES is not very cost-effective. FMES is generally used as a refining agent, but its gross efficiency is low, raw material prices are expensive, and cost-effectiveness is poor. Using FMES as a pre-treatment raw material will significantly increase costs.
Cost performance analysis of FMES:
The solid content of FMES after drying is only 65%, and the price of FMES when converted to 99% content is as high as 17 yuan/kg. It is also sky high to sell anionic products at this price, after all, AES, dodecylbenzenesulfonic acid, etc. are only 700-801 tons.
The alkali resistance of FMES is not as good as advertised, with an alkali resistance of only 30g/L flake alkali at room temperature and about 20g/L flake alkali under boiling conditions at 100 degrees Celsius.
3. FMES has poor resistance to hard water and significantly reduces its cleaning performance under hard water conditions.
4. The permeability of FMES is far inferior to that of sodium dodecylbenzenesulfonate and sodium secondary alkyl sulfonate.
5. The FMES foam is very high and defoaming phenomenon exists. The silicone defoamer component is detected in the component, and silicon spot may occur under high temperature conditions.
FMES contains a large amount of benzene rings, resulting in high COD and BOD values in wastewater.