查询词典 cobalt

Selective reduction roasting ; ammonia leaching ; nickeliferous laterite ore ; nickeliferous iron ore ; nickel and cobalt extraction

选择性还原焙烧；氨浸；低品位红土镍矿；镍铁矿；镍钴提取

The process of selective reduction roasting-ammonia leaching-solvent extraction-electrowinning is adopted to extract nickel,cobalt and recover iron from low grade nickeliferous laterite ore.

本研究采用选择性还原焙烧-氨浸-溶剂萃取-电积工艺从低品位红土镍矿中综合提取镍、钴、铁，重点介绍了采用煤作还原剂，选择性还原焙烧的试验研究。

The catalyst recycle system in the Chemical Plant of Sinopec Yizheng Chemical Fibre Ltd., as ever Dupont's advanced technology, uses recycle agent to precipitate most part of cobalt and part of manganese, and then separate them by the papilionaceous centrifuge.

仪征化纤股份有限公司化工厂催化剂回收系统引进了美国杜邦公司的先进技术，采用回收试剂使母液中的大部分钴和部分锰沉淀，然后通过蝶片式离心机加以分离回用。

New hyperbranched polymers containing triphenylamine were synthesized by polycyclotrimerization of bis(4-ethynylphenyl)phenylamine and 1-octyne with dicarbonyl- cyclopentadienyl-cobalt CpCo(CO2 as catalyst under ultraviolet irradiation.

在以CpCo2为催化剂和紫外光照射的条件下，以二-(4-乙炔苯基)-苯胺和1-辛炔为单体合成了新型的含三苯胺超支化聚合物。

Keywords hyperbranched polymer;triphenylamine;bis（4-ethynylphenyl）phenylamine;1-octyne;[2+2+2] cyclotrimerization;dicarbonyl-cyclopentadienyl-cobalt catalyst;fluorescence quantum yields

超支化聚合物；三苯胺；二-（4-乙炔苯基）-苯胺； 1-辛炔； [2+2+2]环三聚；二羰基茂钴催化剂；荧光量子效率

The sheet-like α-Co2 composed of the uniform nanoparticles was successfully prepared using cobalt chloride as the raw material and polyvinyl pyrrolidone as the dispersant by chemical precipitation method.

以氯化钴为原料，聚乙烯吡咯烷酮为分散剂，采用化学沉淀的方法制备出由纳米粒子组成的片状α-Co2。

A general method for preparing multi-cyclic indolizine compounds(1a—1c, 2a—2b and 3) in moderate yields(45%—71%) by a 1,3-dipolar cycloaddition reaction of pyridinium N-ylides, isoquinolinium N-ylides or quinolinium N-ylides to 1,4,4a ,8a-tetrahydro-1,4-methanonaphthalene-5,8-dione, followed by an aromatization, in the presence of tetrakispyridine cobalt dichromate is described.

在 [ 4Co( HCr O4 ) 2 ]存在下，吡啶叶立德、喹啉叶立德或异喹啉叶立德分别和 1 ，4，4a，8a-四氢-1 ，4-桥亚甲基萘-5 ，8-二酮反应，一步法合成了中氮茚类多环化合物( 1 a～ 1 c，2 a～ 2 b，3 )。该方法原料易得，反应条件容易控制，为合成这类化合物提供了新方

Objective:To investigate the effect of recasting on physical properties of a cobalt-chromium alloy in air environment.

目的：探讨空气环境对多次铸造的钴铬合金机械性能的影响。

Objective:To investigate the effect of recasting on physical properties of a cobalt chromium alloy in air environment.

钴铬合金在口腔修复领域应用广泛，为节省材料，降低修复体的成本，有些学者研究铸造剩余合金的回收再利用[1，2 ] 。

According to studying the factors of using a series of rhodanine ramifications to determine metal ions by catalytic fluorescence method and by utilizing the strong catalysis of metal ions to potassium periodate oxygenating rhodanine, a catalytic fluorescence method of using the new type rhodanine ramifications to determine trace tin, antimony and cobalt was established.

首次研究了系列若丹宁衍生物在催化荧光法测定金属离子中的各影响因素，利用痕量金属离子对高碘酸钾氧化若丹宁具有强烈催化作用的性质，建立了新型若丹宁物质催化荧光法测定痕量锡、锑、钴的新方法。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。