1, citric acid is used in chemical industry and textile industry, and can be used as a reagent for chemical analysis in chemical process, as an experimental reagent, a chromatographic analysis reagent and a biochemical reagent; Used as complexing agent and masking agent; Used to prepare buffer solution. Using citric acid or citrate as builder can improve the performance of washing products, quickly precipitate metal ions, prevent pollutants from reattaching to fabrics, and maintain the alkalinity necessary for washing; Disperse and suspend dust and ashes; It is an excellent chelating agent to improve the performance of surfactants; It can be used as a reagent to detect the acid resistance of building tiles.

2. Environmentally friendly citric acid-sodium citrate buffer is used for flue gas desulfurization. China is rich in coal resources, which is the main source of energy. However, there has been a lack of effective flue gas desulfurization technology, which leads to serious SO2 pollution in the atmosphere. It is urgent to study effective desulfurization process. Citric acid-sodium citrate buffer solution has low vapor pressure, non-toxicity, stable chemical properties and high SO2 absorption rate, so it is a desulfurization absorbent with great development value.

3. Environmentally friendly citric acid-sodium citrate buffer is used for flue gas desulfurization. China is rich in coal resources, which is the main source of energy. However, there has been a lack of effective flue gas desulfurization technology, which leads to serious SO2 pollution in the atmosphere. It is urgent to study effective desulfurization process. Citric acid-sodium citrate buffer solution has low vapor pressure, non-toxicity, stable chemical properties and high SO2 absorption rate, so it is a desulfurization absorbent with great development value.