Industrial Design And Realization Of Menthyl Acetate

Menthol acetate is one of many cool flavor agents,which is the downstream product of menthol.It is mainly used to modulate fruits,peppermint,berries and other fruit flavors.Most of them are used in cool foods such as sweets and beverages.They are used in cosmetic products,toilet water,soap and other daily chemicals,and can also be used to modulate Oriental and citrus flavors.As menthol acetate is a small downstream product of menthol,and the production of menthol is mainly concentrated in BASF,tezhixin,Gaosha and other large enterprises,the rest of the small enterprises are mainly natural extraction.Therefore,the development of menthol downstream products is relatively concentrated,and most of the production technology is in the hands of foreign flavor enterprises.At present,there is relatively little information available in the literature.The patent information involved is mainly related to menthol lactate and menthol benzoate.Therefore,the subject of optimization and industrial design and Implementation Based on the esterification process independently developed by the company will greatly promote the improvement of domestic cool flavor flavor.Under the increasingly severe situation of safety and environmental protection,the key research direction of this project is how to make the products safe,stable and excellent from the laboratory small test to industrialization,and how to reflect the overall competitiveness of the products.This topic focuses on the industrial design and implementation of menthyl acetate products.The paper is based on the products developed by the company and carefully guided by the tutor Ma Chen.The production of menthyl acetate belongs to a typical fine chemical project.Because the product belongs to fragrance series,there are some differences between the production process and the traditional fine chemical industry.At present,there is a lack of systematic summary and standardized implementation process for the implementation of fragrance projects in China,and the control of some key control points is in the hands of a few flavor enterprises.The purpose of this paper is to combine the implementation of menthyl acetate products,refine and summarize the fine chemical production of flavor products,hoping to be able to draw lessons from the industrialization of similar industries.The innovation of this paper lies in the new control means of safety and environmental protection in the process of product industrialization,as well as the key control points to ensure the quality of fragrance in the production process of flavor products.Combining with the process software package and calculation sheet,the procurement,construction and trial production are strictly controlled after the professional design.In terms of aroma assurance,we have adopted some advanced management experience both at home and abroad,and cooperated with world-class manufacturers in equipment design.The paper is divided into five parts,the first chapter is the introduction,which mainly describes the background and significance of the implementation of the project,the main research direction and the general goal framework.The second chapter is the comparison and selection of synthesis routes.Through the comparison and selection of the advantages and disadvantages of acetic anhydride esterification,acetic acid esterification and acetyl chloride method,the route of acetic anhydride esterification is determined.In the third chapter,the process of small-scale test was studied,and the optimal conditions of esterification and distillation were determined.In the fourth chapter,the process of pilot test is studied,and the scale-up benefit of the best process conditions of pilot test is verified.The problems of mass transfer and blockage in the pilot plant were solved.The fifth chapter studies the industrial test process,and further studies the best process determined in the pilot test to verify the feasibility of the best esterification process in the pilot test.In the aspect of post-treatment of distillation,the side line extraction distillation debugging and the aroma optimization of steam steam flushing were carried out to further improve the aroma quality of the product.The sixth chapter is the conclusion,which summarizes the innovation and key points of this paper,and expounds the limitations and shortcomings of this paper.The disadvantage of this paper is that the product synthesis route is relatively simple,and there are relatively few academic innovation points in the research and development process,mainly focusing on industrialization research,such as quality,cost,safety,environmental protection and other comprehensive research topics.The domestic experience in this product field is very limited,and the literature retrieval and citation are relatively few.