Optimization On Synthesis Of Zinc Threoninate And The Design Of A Factory With The Output Of 500t

Zinc threoninate chelate a covalent compound synthesising by zinc and L-threonine with a molar ratio of 1:2 is a safety,efficient,stable and environmental protection zinc additives.2ZnCO3· 3 Zn(OH)2 and ZnSO4 were selected as the zinc source,using one-step hydrothermal to synthesize zinc threoninate chelate.The single-factor experiments were done considering the affect of some factor to the synthetic yield,such as threonine concentration,reaction time,reaction temperature,ratio between L-threonine and zinc and the pH of the system.And then the response surface methodology was used to draw optimal process and maximum yield based on the single-factor experiment results.Then regression model validation was also done.The results showed that:the optimization result of the pathway that selected 2ZnCO3 · 3Zn(OH)2 as the zinc source,the concentration of threonine was 29.49%,the reaction temperature was 92.1℃,the molar ratio of threonine and zinc was 3.4:1,the reaction time is 0.5 h,the zinc threoninte chelate yield was 60.54%in this condition.The optimization result of the pathway that selected ZnSO4 as the zinc source,the reaction Ph value is 6.3,the reaction temperature is 97.8℃,the molar ratio of threonine and zinc was 3.3:1,the reaction time is 3.2 h,the zinc threoninte chelate yield was 44.46%in this condition.Unit cost of production was calculated according to the reaction conditions of the optimal process and maximum yield,to discover a simple operation,green production process,low-cost production.Finally,an feed additives-zinc threoninte chelate factory of an annual output of 500t was designed according to the most suitable pathway.The main contents of plant design include making production program,designing production process,calculating material balance,selecting equipments,calculating labor balance,water,electricity and steam balance,setting enterprise management organizational structure,forecasting economic effect,rendering flow diagram,shop floor plan and whole floor plan.and plant-wide plan.