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- The vapour phase ortho-selective alkylation of phenol with methanol was investigated over spine1-type cobalt chromite catalyst with K as the supported catalyst. 摘要研究了具有尖晶石结构的铬酸钴及负载钾的铬酸钴催化剂上苯酚和甲醇气相邻位烷基化反应。
- Keywords Phenol;Methanol;Cobalt chromite;Spinel;ortho-Selective alkylation; 苯酚;甲醇;铬酸钴;尖晶石;邻位烷基化;
- Cobalt Chromite 亚铬酸钴
- Stellite 6 or cobalt free seats and discs. 钨铬钴合金6或无钴阀座和阀瓣。
- Stellite 6 or cobalt free wedge and seats. 钨铬钴合金6或无钴楔板和阀座。
- Hard Facing is weld deposited Cobalt base alloy. 硬面焊接钴基合金沉淀物。
- Fixed a crash bug within Cobalt systems. 修正了一个 cobalt 系统力的漏洞
- EXP: diamonds, copper, crude oil, coffee, cobalt. 出口:钻石,铜,重油,咖啡,钴
- Knowledge of the occurrence of chromite deposits is likewise incomplete. 对于铬铁矿矿层产状的了解同样是不完整的。
- Chromite and/or magnesite mineralization is usually related to the ophiolites. 铬铁矿及（或）菱镁矿化通常是与蛇绿岩有关。
- Trim numbers with H have cobalt alloy hardfaced seat ring facing. 带有H的阀内件型号具有钴合金硬面阀座环表面。
- Of or containing cobalt, especially with a valence of3. 钴的属于或含有钴的，尤指原子价为3的
- Did equilibration take place before or after setting of chromite and silicates? 究竟平衡作用发生在铬铁矿和硅酸盐下沉之前，还是在其后?
- There are acute shortages of diamonds, platinum, chromite and sylvite. 金刚石、铂、铬铁矿、钾盐等矿产资源供需缺口较大。
- The series of cobalt and nickel catalysts are on the same level. 钴系与镍系催化剂的效果相当 ;
- Yellow jellyfish and red octopuses jet through cobalt waters. 黄色的水母与红色的章鱼,在钴蓝的水域中喷射前进。
- We need cobalt ore. If you can offer please contact us. 我们需要钴矿，如果您能提供请联系我们。
- Decoration in colorful enamels within delicate cobalt blue outline. 彩釉围着钴蓝的外廓。
- Copper cobalt alloy Co., LTDorCopper-cobalt alloy Co. [已解决问题] 英文“ 铜钴合金有限责任公司 ”怎么说？
- Greece has been producing refractory grade chromite ore for more than a hundred years. 希腊生产耐火级铬铁矿石已有百余年历史。
