Ethyl carbamate formation in recently distilled sugar cane spirits: proposal for its control

Quimica nova

Galinaro, Carlos Alexandre¹  Franco, Douglas Wagner¹ 

[1] Universidade de São Paulo, São Carlos, Brasil

关键词: ethyl carbamate;    formation;    sugar cane spirit.;   

DOI  :  10.1590/S0100-40422011000600016

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The commercial sugar cane spits redistillation decreased up to 92,5% theirethyl carbamate (EC) original content. Quantitative analysis of EC in 15 samplesof sugar cane spirit (alembic and column), fresh distilled and collected insitu demonstrated that the urethane is formed mostly after distillation. Theaverage time to achieve the complete EC formation is independent of the diffuselight presence and of the distillation apparatus used. The kobsfor urethane formation at 25 ºC was calculate as (3,3 ±0,5) x 10-5/s and the activation parameters are: ΔH‡34 kcal/mol; ΔS‡ - 69 cal/mol K;and ΔG‡ 54 kcal/mol.

【 授权许可】

CC BY