制取碳化钒试验研究

研究了用多聚钒酸铵加炭粉混合压制成型，在一定的温度下进行烧结，通氩气保护制取碳化钒的新工艺。考察了多聚钒酸铵及炭粉质量，炭粉粒度，配碳化，烧结温度，氩气流量，恒温时间等对碳化钒质量的影响。在实验室获得了合格的的碳化钒产品。     

用金属硅粉制备硅溶胶的新工艺

本文根据硅粉在碱做催化剂的条件下能反应生成硅溶胶的原理，采用水玻璃和氨水做催化剂，对工艺中的反应温度，反应时间和硅粉用量进行了研究和讨论，得出了制备硅溶胶较好的工艺条件。     

文摘

用聚合物选择性预浓集Th:BüyüktiryakjS·,et al.,Talanta,2005,67(3),640~645制备了一聚合物,用来从含UO22 、Ce3 和La3 溶液中选择性预富集Th(Ⅳ)离子。选用CN-异丁烯酰-(L)-谷氨酸(MAGA)作为配合母体。首先Th(Ⅳ)与MAGA配合,并借助悬浮聚合作用,合成带有Th(Ⅳ)的聚合珠;随后用8·0 mol/L HNO3溶液回收Th(Ⅳ)。每g珠的Th(Ⅳ)穿透容量为40·44 mg。珠体对UO22 、La3 、Ce3 的相对选择系数分别为68、97和116。带有Th(Ⅳ)的珠体能重复使用若干次,而其穿透容量不会明显减小。用APDC-AC从水溶液中预富集Cd(Ⅱ)等多种金属离子…     

原料酸卸车系统技术改进分析

分析了酸卸车系统存在的泵与管路的匹配、鹤管真空损失、酸腐蚀等技术问题，提出了鹤管的改进、卸车泵更新、真空系统水封、管路系统改进等保证真空能力的具体措施，实现了全自动、密闭卸车作业，最大限度地满足安全、快卸、底料少的要求。     

Co^3＋—modified Surface of LiMn2O4 Spinel for its Improvementof Electrochemical Properties

Cobalt was used to modify the surface of spinel LiMn2O4 by a solution technique to produce Co^3 -modified surface material (COMSM). Cobalt was only doped into the surface of LiMn2O4 spinel. XPS(X-ray photoelectron spectroscopy) analysis confirms the valence state of Co^3 . COMSM has stable spinel structure and can prevent active materials from the corrosion of electrolyte. The ICP(inductively coupled plasma) determination of the spinel dissolution in electrolyte showed the content of Mn dissolved from COMSM was smaller than that from the pure spinel. AC impedance patterns show that the charge-transfer resistance (Rct) for COMSM is smaller than that for pure spinel. The particles of COMSM are bigger in size than those of pure spinel according to the micrographs of SEM(scanning electron microscopy). The determinations of the electrochemical characterization show that COMSM has both good cycling performance and high initial capacity of 124.1 mA/h at an average capacity loss of 0.19 mAh/g per cycle.     

由废酸生产饲料级磷酸氢钙

本文报道了从工业抛光所弃废的混酸(硫酸、磷酸、硝酸的混酸)中回收磷酸制取饲料级磷酸氢钙的实验研究过程及工业生产情况。由于废混酸中硝酸含量很低,因而将废酸视为硫酸与磷酸的混合物。采用分步沉淀法,先用石灰乳除去废酸中的硫酸,再将脱硫酸后的酸液与石灰乳反应制取磷酸氢钙。实验中发现,脱硫酸时,石灰乳的加入量对后续产品磷酸氢钙的质量有较大影响。产品磷酸氢钙要达到部颁标准的要求,脱硫酸时石灰乳的加入量应超过理论量的10％以上。在小试的基础上,进行了工业生产试验,效果良好。废酸中磷酸的回收率达到95.3％以上,产品质量达到部颁HG 1-792-75标准。进行了生产过程的经济效益分析,由废酸生产一吨磷酸氢钙产品,总成本约为1010元,利润为490元,对于年产500吨磷酸氢钙的企业,年利润可达24.5万元。回收废酸,不仅带来较好的效益,而且节省三废治理费用,变废为宝。     

有机试剂2—（5—溴—2—噻唑偶氮）变色酸的合成及其性能的研究

以α－氨基噻唑为原料，经溴化得５－溴－２－氨基噻唑，然后重氮化，最后与变色酸偶联合成２－（５－溴－２－噻唑偶氮）变色酸。用水重结晶精制。经元素分析，红外光谱等鉴定了其结构，测定了其六级离解常数并研究了其性质。     

Enantioselective extraction of mandelic acid enantiomers based on chiral ligand exchange

Based on the chiral ligand exchange, the distribution behavior of mandelic acid enantiomers, and the partition of Cu^2 at different pH values were studied in a water/alcohol two-phase system containing Cu^2 and N-ndodecyl-L-proline(A). The influences of the solvent sort, the pH value, the concentrations of Cu^2 and chiral ligand on the partition coefficient(K) and separation factor(α) were discussed. The experimental results show that the A formed has more stable ternary complex with D-mandelic acid enantiomer than with L-mandelic acid enantiomer. There is an important influence of the pH value on K and a. When the pH values are less than 3.5, the formation of binary complexes is thermodynamically unfavourable. K and a become maximum when pH values are above 3.5 and the molar ratio of the chiral ligand to Cu^2 is 2:1.