摘要
传统二步化学法生产生物柴油涉及两种化学反应,一种是游离脂肪酸的酯化反应,另一种是中性油脂的酯交换反应。实际生产过程中,一般采用搪玻璃反应釜,搅拌强度低,同时游离脂肪酸酯化反应产生的水,使酯化可逆反应向反方向进行,影响酯化率。为此,通过在甲醇回流管道中增添连续吸附脱水柱脱除反应过程中生成的水,使反应向正方向进行;通过在反应釜外增加强制交联机,增加反应物的接触,从而提高酯化率。实践表明,改进后甲醇用量降低,反应时间缩短,酯化率提高,有效地降低了企业的生产成本。
There were two chemical reactions in the production of biodiesel by two - step chemical meth- od, one was the esterification of free fatty acid and the other was the transesterification of neutral oil. In the actual production process, the glass -line reactor was usually used, so the stirring intensity was low. In addition, the water produced by the esterification of free fatty acid made the esterification reaction perform to the reverse direction. The above two points affected the esterifcation rate. Therefore, the improve- ment measures were taken, such as adding continuous adsorption dehydration column in the return piping of methanol to remove the generated water, and setting up compulsory crosslinking machine outside the reactor to increase the contact of reactants to improve esterification rate. The practice showed that after improvement, methanol dosage was decreased, reaction time was reduced and esterification rate was im- proved, which effectively reduced production costs of company.
出处
《中国油脂》
CAS
CSCD
北大核心
2016年第7期82-84,共3页
China Oils and Fats
关键词
生物柴油
二步化学法
强制交联搅拌
连续吸附脱水
biodiesel
two - step chemical method
compulsory crosslinking mixing
continuous adsorption dehydration
