菸酸与二乙胺、三氯氧磷作用,再经氢氧化钠中和,加入纯碱使反应液中的产品与水分层,取代有机溶剂萃取工艺,简化了操作,降低了消。
Instead of extracted by organic solvents, sodium carbonate was used to separate the product and water, thus the following press was simpler and the cost was lower.
聚合物和颜料在前面已经讨论过,混合溶剂是水溶性的乙二醇醚类, 它有助树脂在水中的水分散和提高涂膜的均一性。
The polymers and pigments have been discussed previously. Coalescing solvents are water-miscible glycol ethers which aid in the water-dispersibility of the resin and enhance coating uniformity.
样品前处理采用了先去除样品中水分,再用有机溶剂提取残留农药的方法。
The samples were treated by wiping off water. The pesticides residues were extracted with aceton.
用乳化溶剂蒸发法制备了羟丙甲纤维素酞酸酯水分散体。
Hydroxypropyl methyl cellulose phthalate aqueous dispersion was prepared by emulsion-solvent evaporation.
论文还对液化反应过程中初始水分作用机理、水热处理作用机理和有机溶剂溶胀处理作用机理进行了分析探讨。
The mechanism of initial water content, hydrothermal pretreatment and organic solvent swelling pretreatment in the liquefaction processes was also analyzed and discussed.
特殊设计的溶剂箱结构,防止水分进入干洗系统。
Special designed solvent box structure prevents water entering dry-cleaning system.
认为在混合溶剂的富水区大块的似冰山结构的水分子簇的寿命大大延长。
It is considered that the life of the bulky iceberg - like water clusters is lengthened greatly in the region rich in water.
本发明还提供了通过该无溶剂组合物在水中的分散获得的水不溶性生物杀伤剂和水溶性载体的水分散体。
The invention also provides an aqueous dispersion of a wat er insoluble biocide and a water-soluble carrier obtained by the dispersion of the composition of the solvent free composition in water.
本发明还提供了通过该无溶剂组合物在水中的分散获得的水不溶性生物杀伤剂和水溶性载体的水分散体。
The invention also provides an aqueous dispersion of a wat er insoluble biocide and a water-soluble carrier obtained by the dispersion of the composition of the solvent free composition in water.
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