reaction product vapor through methyl formate separating area, condenser and tail condenser, methyl formate crude product mixed liquor is got from gas phase condensation separating.
the invention relates to a method for removing residual palladium in crude product of faropenem sodium prepared by a palladium catalysis method, belonging to the field of organic medicinal chemistry.
本发明属于有机药物化学领域,涉及一种从钯催化法制备的法罗 培南钠粗品中去除残留钯的方法。
the results showed that the major component of the crude product was the desired tridecapeptide and the main by-products were derived from the oxidation or deformity of the desired peptide.
结果证明,粗产物中的主成分即为目标十三肽,另外几个主要副产物为十三肽的残缺肤或氧化肽。
the troublesome separation of column chromatography would be avoided as crude product recrystallized inn-butanol.
粗产物采用正丁醇重结晶,避免使用较繁琐的柱层析分离。
the recovery rate of styrene in the tar is nearly 92%; the mass fraction of crude product styrene is 98%.
苯乙烯回收率可达92%以上,粗品苯乙烯的含量在98%(质量分数)以上。
the p-methylaniline and other impurity in the crude product are adsorbed by active carbon and the purified 4b acid is precipitated out by acidic solution from middle compartment.
after centrifugation, the purity of the crude product was 23%.
离心分离后,血红素粗品的纯度为23%。
the blumea balsamifera powder is a crude product of borneol.
艾粉是艾纳香制取冰片的粗级产品。
under the optimized reaction conditions the yield can reach 85% and the content of product can reach 95% by rectification of the crude product under vacuum.
在优化的反应条件下,亚磷酸三异丙酯的产率达到85 %。对粗品进行减压精馏,产品含量达到95 %。
crude product by simple distillation, styrene recovery was 89.41% of total styrene monomer purity of 99.9%, and catalyst recycling, the effect is better.