Phosphorus-free reverse osmosis scale inhibitor and preparation method thereof

The invention provides a phosphorus-free reverse osmosis scale inhibitor and a preparation method thereof. The scale inhibitor is mainly prepared from raw materials such as maleic anhydride, hydrogen peroxide, isooctyl 3-mercaptopropionate and citric acid. By virtue of the phosphate-free reverse osmosis scale inhibitor, the problems that organophosphorus is used as a main material of the existing reverse osmosis scale inhibitor, the content of the phosphorus is high, thallose slime is easily generated and an reverse osmosis film is polluted in the prior art are solved; meanwhile, the problems that foreign products are used as main components of the reverse osmosis scale inhibitor, the treatment capability of the reverse osmosis scale inhibitor is limited, the reverse osmosis scale inhibitor is complexly synthesized and the production cost is relatively high in the prior art can be solved.