Study On New Comprehensive Utilization Process Of Catalyst During Methanol Synthesis

Currently low-pressure process is commonly used in methyl alcohol production , in which copper-based catalysts are used. Copper-based catalsts are sensitive to sulphur, CuS or Cu₂S formed by the combination of the H₂S in synthesis gas and the apper in the catalyst would decnease the reativity and decelarate thd aging of cafalysts.Now there ane many ulilgation of the waste methyl alcohot catalysts reproduction , such as the preparation of Cu, CuO , CuCl,CuSO₄ trace-element fertilzers and the methyl aloohot catalysfs reproduction.The next chart â–¡first crushes after this research waste methyl alcohol synthetic catalyst effective component comprehensive utilization technical process the waste methyl alcohol catalyst the certain degree the fever, gas water used absorption and so on production sulphur dioxide, nitrogen dioxide, except impurity, burns after the spent catalyst to dissolve the certain time with the certain density ammonium chloride solution, the zinc oxide is big because of the solubility and majority of enters the filtrate by the zinc ammino ion form, obtains the zinc hydroxide after the hydrolisis to precipitate, after filters, burns obtains the zinc oxide; The copper oxide small and majority of enters the filter residue because of the solubility, after washes produces the cupric sulfate with the sulfuric acid dissolution, the cupric sulfate and the sodium carbonate has the replacement reaction production basic copper carbonate, then joins the thick hydrochloric acid and the copper powder in turn, the return to original state obtains the cuprous chloride, after pulls out filters out the filtrate, then drying namely protochloride clang this topic has following characteristic 1 ) not to have two times of dirty persimmons2) this research to use the complexing the method, is small to the equipment corrosiveness3) soaks takes the fluid to be possible to recycle the advantage â–¡!Since 2002,there ane more alcohol plants , have been built up and the capacity of 5000,000t/a are increased. Then 10,000¹2,500t/a waste catalysts are produced, If they ane all produced to CuCl and ZnO, then new benefits would be 6500¹000 yuan/a , There is a wide prospect of market.