查询词典 xanthate

Commercially available 2 nitro 4 methoxyaniline was used as starting material and converted via reduction with zinc dust and cyclization with potassium ethyl xanthate into the title compound,suggesting that this procedure is suitable for industrial production.

以4 甲氧基 2 硝基苯胺为原料，经锌粉还原后，再与乙基黄原酸钾环缩合制得2 巯基 5 甲氧基 1H 苯并咪唑。结果收率80%。结论该方法简单易行，适合工业化生产。

The mixed collectors studied were as following: benzyl arsonic acid-sodium butyl xanthate for walframite flotation, salicylohydroxamic acid-F〓, salicylohydroxamic acid-cupferron, salicylohydroxamic acid-TBP , F〓-TBP, cupferron-benzohydroxamic acid etc. for cassiterite flotation and mixed aliphatic acid or aliphatic amine for beryl or spodumene flotation.

研究过程中，本文选用了如下具体实例：苄基胂酸与丁基黄药浮选黑钨矿，水杨羟肟酸与F〓、水杨羟肟酸与铜铁灵、水杨羟肟酸与磷酸三丁酯、F〓与磷酸三丁酯、铜铁灵与苯异羟肟酸两两结合浮选锡石，混合脂肪胺与混合脂肪酸浮选锂辉石与绿柱石。

Copolymerize methacrylic acid 3(4′-N,N-dimethylamino) ketone xanthate and acrylamide were copolymerized with N,N-methylene bisacrylamide,and then combined with silane ethylene group in the form of covalent bond on the quartz glass shee t to be made into a sensor,to determine ethanol.

将甲基丙烯酸3-(4′-N，N-二甲氨基)黄酮酯和丙烯酰胺、N，N′-亚甲基双丙烯酰胺共聚并共价键合在硅烷化的含乙烯基团的石英玻片上，制成了可测定乙醇的传感器。

The research results obtained showed that, sulphonating extent of synthetic starch xanthate was high, under room temperature, time 120 minutes, mol ratio of starch, sodium hydroxide and disulphide being 10 : 4 : 3, It was to say that sulphur content and supplent extent were high.

研究结果表明，原料配比为：淀粉：NaOH：CS_2为10：4：3，反应温度为室温，黄化反应时间为120min，合成DX的黄原酸化程度高，即产品含硫量和取代度高。

With butyl xanthate as a collecter, the flotation behavior of jamesonite, pyrrhotite and marmatite, the depressing effects of small mercapto organic depressant (mercaptoacetic acid, mercaptoethanol ) and the effect of Cu2+ ion on depressing ability of mercapto compound were studied through flotation test and infrared spectrum.

摘 要：通过浮选实验、红外光谱测定，考察了脆硫锑铅矿、磁黄铁矿和铁闪锌矿在丁黄药作用下的浮选行为和巯基类小分子有机抑制剂对三种矿物的抑制效果以及Cu2+离子对巯基化合物抑制效果的影响。

When this hydroxamate-xanthate collectorsystem used to float another highly siliceous pelitic copper oxide ore,a copperconcentrate of 25% Cu can be obtained with recovery of 85% for free copper oxide.

自由氧化铜回收率≥85%，选择合适的调整剂及相应的流程结构更有利于羟肟酸-黄药&混合剂&在Cu-Fe共生难选养化矿浮选中发挥最佳效用，不仅可以得到品位达36%的优质铜精矿。

The thesis deliberated synthetization of starch xanthate.

本文对淀粉黄原酸酯的合成进行了研究。

The optimal conditions determineded by experiments were as follow: chloracetic acid : sodium carbonate : isopropyl xanthate : ethylamine=l : 0.58 : 1 : 1.05, water usage is 30 ml/O.lmol chloracetic acid, esterification temperature was 80癈, esterification time was 2h, ammonolysis temperature was 70 C, ammonolysis time was Ih.

实验得出最佳工艺条件为：一氯乙酸：碳酸钠：异丙基黄药：乙胺=1：0.58：1：1.05，水用量为30 ml／0.1mol一氯乙酸，酯化温度80℃，酯化时间2小时，氨解温度70℃，氨解时间1小时。

The alkali cellulose is then treated with carbon disulfide to form cellulose xanthate.

碱纤维素再经二硫化碳处理制成纤维素磺酸酯。

In a domestic zinc smelter,the "burning board" phenomenon in zinc electrodeposition resulted from the cobalt recycling to zinc system with poor cadmium solution frequently occurs,the processes and the effects for cobalt removal from poverty cadmium solution both with antimony salt and with sodium ethyl xanthate are investigated for solving the "burning board" problem.

国内某湿法锌冶炼厂由于贫镉液中的钴随贫镉液返回锌系统形成钴的闭路循环而频繁出现锌电解的钴&烧板&现象，为此研究贫镉液锑盐除钴和黄药除钴过程和效果。

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％。