Leaf Acetate Production Echnology Research And Pilot Test Design

Cis-3-hexenyl acetate (Leaf acetate) is a senior spice with bananas smell. It is widelyused in food and daily chemical products such as cosmetics and detergent due to its pureand thick fragrance. Therefore, it has a very good market prospects. The general method ofpreparing cis-3-hexenyl acetate is the direct esterification, which use the acetic acid andleaf alcohol as the reactants, and use a kind of acid as catalyt. Choosing a suitable catalystplays an important role in the process of the reaction. It can not only improve theproduction rate of cis-3-hexenyl acetate but also reduce the costs. In this experiment, wechose a cation exchange resin as catalyst to prepare cis-3-hexenyl acetate, which canimprove the production rate and simplify the follow-up process. Furthermore, the variousprocess conditions were determined through orthogonal test, which can provide guidanceto carry on the pilot design.This paper described the properties of the cis-3-hexenyl acetate, the progress of theresearch of cis-3-hexenyl acetate and production status, introduced the application ofcis-3-hexenyl acetate and its supply and demand situation. Thus we can draw theconclusion that leaf acetate has great market potential. It is thoutht that designing aproduction line has the very vital significance. Then, we studied the synthesis conditionsof cis-3-hexenyl acetate with the orthogonal experiment method, and determined theprocess parameters of the pilot design. The process parameters are: the molar ratio ofalcohol and acid is1:1.2; the reaction time is5h and the dosage of the catalyst is30%ofthe quality of the leaf alcohol. We can get the products after filtering, washing and vacuumdistillation. The diopter is1.4261and the yield is88.36%.According to the experimental data, we designed the annual output of10tons ofcis-3-hexenyl acetate process. Through the material balance and heat balance calculation,we selected the type of all sorts of required equipment in this process. The process is anintermittent operation process, so the operation of the process is simple, and the cost of theequipment is low.In summary, we make use of cation exchange resin as catalyst to prepare cis-3-hexenyl acetate and then completed the pilot design according to experimentalresults, which can provide research approach for future industrialized production.