溶剂

Acetone and methyl ethyl ketone does have a strong solubility, due to solvent inks are pigment dispersant through a combination of bond and bond formation of throwing power, and too strong solvents will destroy this balance, resulting in pigment dispersion instability precipitation, the ultimate plug nozzle.

丙酮和丁酮确实有很强的溶解性，由于溶剂墨水中的颜料是被分散剂通过键与键的结合形成分散能力的，过强的溶剂会破坏这种平衡，造成颜料分散的不稳定，产生沉淀，最终堵塞喷头。

Effects of different extraction modes, extraction time, pressure and temperature on the extraction yield of onion essential oil and sulphur concentration were investigated,and the different extraction solvents and extraction times were researched in liquid-liquid extraction procedure. The optimal conditions of extraction of onion essential oil with subcritical water were static extraction, 100~150℃sequential program temperature increasing extraction for 30min, 5MPa, petroleum ether as extraction solvent for two times.

考察了提取方式、提取时间、温度、压力对洋葱精油的提取得率及含硫化合物浓度的影响，并对液液萃取中溶剂的种类和萃取次数进行了研究，得到了洋葱精油的亚临界水提取最佳工艺：静态提取、提取时间30 min，压力5 MPa，100～150 ℃的连续程序升温，石油醚为萃取溶剂，萃取2次。

Textile: All kinds of dyestuff and pigment, disperse dye, acid dye, reactive dye, basic dye, direct dye, vat dye, Sulphur Dye, Indigo blue, sulfureted black, organic pigment, printing plasm, color dyestuff, etc; Various Dye intermediates; Textile, Dyeing and Finishing Auxiliary: dye dispersed/ water treatment/ preparative treatment/ printing treatment/ printing behind treatment/ treatment and machining auxiliary, inorganic pigments and ore stuff, organic impregnant, surface active impregnant, printing auxiliary, environmental and functional style auxiliary, etc; Other Auxiliary : Chemical fiber monomer, activator, chemical fiber oil auxiliary, supple auxiliary, bond, finishing auxiliary and other chemicals; Textile Industry environmental technology, quality authentication system and relative apparatus and equipments, etc.

纺织：染料和颜料，分散染料，酸性染料，活性染料，碱性染料，直接染料，还原染料各种硫磺染料，靛蓝，硫化氢黑色，有机颜料，印刷浆，彩色染料等；各种染料中间体；纺织，染整助剂：染料分散/水处理/制备治疗/打印处理/后处理印刷/处理和加工助剂，无机颜料和矿石材料，有机溶剂，表面活性溶剂，印花助剂，环境和功能的风格辅助等；其他助剂：化纤单体，催化剂，化纤油助剂，柔软助剂，债券，后整理助剂和其他化学物质；纺织工业的环保技术，质量认证系统及相关仪器和设备等。旅游报名热线：0871-8080111 在线预订（留下联系方式即可，我们将在最快时间联络您！

If the progress of the solvent front is monitored closely, itis also acceptable to draw start and stop lines on the plate before the chromatogram is run (A pencil should be used because ink is soluble). This prevents inaccuracies that occur when the solvent evaporates before the final solvent front can be marked. Sketch the chromatograms in your lab notebook.

如果要密切监测溶剂前沿前进过程，可在进行层析前可以先把起始线和终止线先标上，这方法是可以接受的(应该用铅笔，因为墨水是可溶解的)这样的话可以避免由于溶剂前沿在被作标记前已挥发掉所引起的不准确度。

If the progress of the solvent front is monitored closely, itis also acceptable to draw start and stop lines on the plate before the chromatogram is run (A pencil should be used because ink is soluble). This prevents inaccuracies that occur when the solvent evaporates before the final solvent front can be marked. Sketch the chromatograms in your lab notebook.

如果要密切监测溶剂前沿前进过程，可在进行层析前可以先把起始线和终止线先标上，这方法是可以接受的(应该用铅笔，因为墨水是可溶解的)这样的话可以避免由於溶剂前沿在被作标记前已挥发掉所引起的不准确度。

The experiment adopt capital: Thousand layers of tower entire grass crush , the sour water logging carries , centrifugal fliteration , concentration, neutralize , the organic solvent extracts , oppose an extraction , still organic menstruum of alkali liquor extracts , concentrates , extracts except steps such as miscellaneous , fading and highly valuing crystal from the thousand layers of a tower middle draw, pure fossil China fir alkali A.

本实验采用：千层塔全草粉碎、酸水浸提、离心过滤、浓缩、中和、有机溶剂萃取、碱液反萃取、再有机溶剂萃取、浓缩、萃取除杂、脱色和重结晶等步骤从千层塔中提取、纯化石杉碱甲。

There are about 400-500 solution in the market, where solvent naphtha (hydrocarbon solvents, benzene compounds): 50 or so.

目前约有400-500种溶剂在市场上销售，其中溶剂油占一半左右。

There are also 6 # extraction solvent washing of oil, gasoline, aviation, 310 # of color print ink solvent naphtha.

此外还有6#抽提溶剂油，航空洗涤汽油，310#彩色油墨溶剂油。

Tetraallylsilane was synthesized by one-step approach through the reaction of silicon tetrachloride with the partially solvated Grignard reagents formed in situ from allyl bromide and magnesium in the mixed solvents of toluene and ether.

采用一步合成方式，将3-溴丙烯与金属镁在以甲苯和供电子溶剂构成的混合溶剂中进行反应，继而与四氯化硅反应，成功合成了四烯丙基硅烷，其产率在乙醚与3-溴丙烯的摩尔比为4(V甲苯/V乙醚=1·1)时达到极值，超过了91%。

In the present dissertation, a surfactant-templated mesoporous silica molecular sieve with high pore volume, high porosity and narrow bimodal mesopore size distribution was synthesized for the first time in a reaction system, which was used usually in the synthesis of mesoporous MCM-41 molecular sieves, by a judiciously controlled two-phase sol-gel processing under basic conditions.

在本论文中，我们通过对一个通常用于制备介孔MCM-41分子筛的反应体系中正硅酸乙酯水解与缩合反应相对速率的精确调控，首次在弱碱性体系中合成了一种具有高孔隙率、大孔体积和双介孔孔分布特征的新型二氧化硅分子筛材料，简记为BMS，并对BMS二氧化硅分子筛中双介孔结构形成的原因及各种可能对其结构和性质产生影响的合成因素如Ammonia／silica摩尔比、组分浓度的变化、表面活性剂烷基链长度的调节、辅助有机物均三甲苯的引入、催化剂的结构和性质、溶剂和助溶剂的极性和用量、老化和干燥条件的变化及合成后水热处理等，利用不同的测试手段如XRD，SEM，TEM，〓Si MAS NMR，TG-DTA，N〓吸附测试等进行了系统的表征研究。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。