Chiral separation methods, post-synthesis,are very expensive and have low yield, starting with materials generally containing about 66% semiconducting species and 33% metallic species.
目前国内环保无毒增塑剂的生产正面临两大难题,一是副产品多,收率不高;
At present, the production of environmentally friendly non-toxic plasticizer is facing two problems,one by-product of many, the yield is not high;
将来可能改进钻井液热回收技术,降低处理费用,提高有机碱液回收率。
The future may improve the drilling fluid heat recovery drilling waste treatment technology, reduce processing costs,improve the organic lye recovery rate.
The organic phase is dried over anhydrous sodium sulfate andthe solvent evaporated under reduced pressure to yield a residue that was purified by vacuum distillation to give 3(58%).
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