摘要
在定性分析醇解轻油组成的基础上,通过热重模拟和实沸点蒸馏研究醇解轻油分离提取高值化学品的可行性,结果表明蒸馏过程可以分为4个阶段:a)室温～141℃;b)141～207℃;c)207～280℃和d)280～400℃。近70%的馏分在207℃以前被蒸出。同时,即使在141℃以下,也会发生缩聚反应生成水,而且生成的水能够夹带出部分正辛醇。而在141～207℃馏程范围内,正辛醇、甲酸辛酯、乙酸辛酯和少量的己酸-4-辛酯及二辛醚形成共沸物。蒸馏残渣的红外光谱分析结果表明,蒸馏过程发生羟醛缩合反应以及脱水缩聚反应,生成更多的芳烃和醚类化合物。
Based on the qualitative analysis of light oil from biomass alcoholysis, the therrnogravimetry simulation and real distillation processes were performed to study the feasibility of separation of valuable chemicals from light oil. The results showed that the distillation processes could be divided into four stages： a） room temperature-141 ℃ ; b）141-207 ℃ ; c） 207-280 ℃ and d） 280-400 ℃. Near 70% fraction was distilled before 207℃. It was found that condensation reaction took place even at the first stage under the temperature of 141 ℃, which resulted in the formation of water. During this stage, 1-octanol could be entrained with the water in distillation process. At the second stage of temperature between 141-207 ℃, an azeotropic system was formed by 1-oetanol, formie-aeid-oetyl-ester, acetic-acid-oetyl-ester, and minor hexanoie-aeid-4-oetyl-ester as well as octylether. Finally, the FTIR analysis on the distillation residue showed that aldol condensation and dehydration reaction took place during the distillation processes, which resulted in the formation of aromatic compounds and ethers.
出处
《林产化学与工业》
EI
CAS
CSCD
北大核心
2012年第2期21-24,共4页
Chemistry and Industry of Forest Products
基金
国家林业局林业公益性行业科研专项(200904026)
关键词
生物质
醇解
轻油
精炼过程
biomass
aleoholysis
light oil
refining process
