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

Química Nova

Universidade de São Paulo, São Carlos, Brasil¹  Franco, Douglas Wagner¹  Galinaro, Carlos Alexandre¹ 

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% their ethyl carbamate (EC) original content. Quantitative analysis of EC in 15 samples of sugar cane spirit (alembic and column), fresh distilled and collected in situ demonstrated that the urethane is formed mostly after distillation. The average time to achieve the complete EC formation is independent of the diffuse light presence and of the distillation apparatus used. The kobs for 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】

Unknown