Calcium ammine catalyst was prepared with metal calcium, dehydrated liquid ammonia as raw materials, nano-silica as a carrier and acetonitrile and propylene epoxide as modifiers.

采用金属钙、脱水液氨、载体纳米二氧化硅及改性剂乙腈与环氧丙烷制备出氨钙体系催化剂。

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Purpose - To synthesise calcium titanate with a perovskite structure as an anticorrosion pigment for metal protecting paints.

目的-采用具钙钛矿结构的钛酸钙合成用于金属保护漆的防腐颜料。

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The metal elements such as sodium and calcium in catalytic cracking feed were poisonous to the catalyst.

催化裂化原料中钠、钙等金属元素的含量较高时会导致催化剂结块、中毒。

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It involves taking oxygen to the fuel not as a gas, but bound to a metal such as iron or calcium, and should in principle make combustion more efficient.

BBC: Whatever happened to carbon capture?