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Nitratomethyl-3-ethyloxetane was synthesized by the process of cyclization, nitation from trimethlolpropane and diethyl carbonate, and the homopolymer of 3-nitratomethyl-3-ethyloxetane was synthesized with 1,4-butanediol as initator and boron trifluoride etherate as an catalyst by cationic ring-opening polymerization.

以三羟-甲基丙烷和碳酸二乙酯为原料经环化、硝化两步反应合成了化合物3-硝酸酯甲基-3-乙基氧丁环;采用1,4-丁二醇为引发剂,三氟化硼乙醚(BF3Et2O)为催化剂,NIMEO发生阳离子开环聚合得到一种端羟硝酸酯均聚醚PNIMEO。

Therefore we believe this phase diagram can apply to phase diagram analysis of trona carbonation and phase diagram calculation.

最终认为该相图同样可用于天然碱碳酸化相图分析与相图计算。

The mineral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mined or recovered from dry lake bed s.

世界上有少数地方有矿物天然碱,这种矿石为二碳酸三钠,即碳酸钠石,通常蕴藏在干湖底。

The mineral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mined or recovered from dry lake beds.

世界上有少数地方有矿物天然碱,这种矿石为二碳酸三钠,即碳酸钠石,通常蕴藏在干湖底。

The mineral trona, a compound of sodium carbonate and bi carbonate , is one naturally occurring alkali. It may be mined or recovered from dry lake beds.

世界上有少数地方有矿物天然碱,这种矿石为二碳酸三钠,即碳酸钠石,通常蕴藏在干湖底。

The mineral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mined or recover ed from dry lake beds.

世界上有少数地方有矿物天然碱,这种矿石为二碳酸三钠,即碳酸钠石,通常蕴藏在干湖底。

The mine ral trona, a compound of sodium carbonate and bicarbonate, is one naturally occurring alkali. It may be mine d or recovered from dry lake beds.

世界上有少数地方有矿物天然碱,这种矿石为二碳酸三钠,即碳酸钠石,通常蕴藏在干湖底。

The determination of chloride in industrial strontium carbonate by turbidimetry with spectrophotometer is described.

采用目视比浊法测定工业碳酸锶中的氯化物,若溶液有色,准确定量非常困难。

The effects of dimethyl carbonate as an oxygenate additive in diesel f uel on fuel characteristics,engine performances and emissions are studied.

研究了用碳酸二甲酯作为含氧燃料添加剂对燃料性质及柴油机性能和排放的影响。

Uncorroborated mineral water, please.

请给我不含碳酸的矿泉水。

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