合成几种磷钼酸盐催化剂,并对其进行XRD和TG表征.考察磷钼酸盐催化剂的种类、催化剂焙烧温度、催化剂的用量、酸醇摩尔比、反应温度、反应时间对油酸与甲醇酯化反应转化率的影响.结果表明:以磷钼酸锡为催化剂,在n(油酸):n(甲醇)=1:8、催化剂用量为油酸质量的4％、回流温度(68±1)℃下反应6h,油酸与甲醇酯化反应的转化率达到95.4％.磷钼酸锡催化剂易回收,最少可重复使用5次.在上述条件下考察磷钼酸锡催化不同脂肪酸和不同醇的酯化反应的活性,结果表明:当醇的碳链增加时,其酯化反应的转化率减小;当脂肪酸的碳链增加时,其酯化反应的转化率仅略有减小.%Several metal salts of phosphomolybdic acid catalysts were synthesized and characterized by XRD and TGA. The catalytic performance of these prepared catalysts was studied by esterification of oleic acid and methanol reaction, and the effect of catalyst types, calcination temperature, acid/alcohol molar ratio, catalyst dosage, reaction temperature and reaction time on the conversion of oleic acid and methanol esterification was investigated. Test results showed that using SnPMo as catalyst with a dosage of 4% (based on the mass of oleic acid) , under acid/alcohol molar ratio of 1:8 and refluxing at (68 ± 1)℃ for 6 h, the conversion of esterification reached 95. 4%. Moreover, this catalyst could be easily recovered and reused at least five times. The influence of various alcohols and fatty acids on the esterification was also investigated using SnPMo catalyst under the above reaction conditions. Results showed that the conversion of esterification decreased with the increase of alcohol carbon number, yet the carbon number of fatty acid had less influence on conversion.
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