合成甲基磺酰氯的新方法

在盐酸介质中，利用双氧水氧化Ｓ－甲基异硫脲盐，合成了甲基磺酰氯，收率７０％。     

新法合成三氟甲基苯乙酮

提出了利用三氟甲基苯胺重氮盐与乙醛肟合三氟甲基苯乙酮的新方法。     

沉淀法制备纳米氧化铝粉体的新工艺研究

以（NH4）2CO3为沉淀剂，并采用一种高分子分散剂，研制出沉淀法制备纳米氧化铝粉体的新工艺。制备出球形纳米氧化铝粉体，在800℃煅烧得到的颗粒尺寸为5－6nm，在1100℃煅烧得到的颗粒尺寸约为8nm。研究了沉淀pH、溶液浓度、煅烧温度和分散剂用量对纳米氧化铝粉体性能的影响。     

A new method for the preparation of stable carbon nanotube organogels

Single-walled carbon nanotubes (SWNTs) functionalized by ferrocene-grafted poly(p-phenyleneethynylene)s can gelate common organic solvents such as chloroform to form a freestanding carbon nanotube organogel that cannot be redispersed in any organic solvents, indicating the robustness of 3D nanotube network. The drying of SWNT gel on silicon wafer in the air gives a highly convoluted film that is composed of numerous bumps and grooves at multiple length scales. In addition, we report a method for the preparation of an insoluble, homogeneous, electroactive SWNT film from a fresh SWNT solution, which may find applications in nanotube coatings and thin films that require both uniformity and solvent-resistance.     

制备二氧化氯的新方法

本文介绍了用氯酸钾与硫酸联氨反应制备二氧化氯的新方法。实验结果表明,在一定条件下,氯酸钾与硫酸联氨反应是一种安全有效的制备二氧化氯的方法,可得到收率大于９０％ 、纯度在９１％ 以上的二氧化氯。     

A new method for the preparation of titanium-silicalite (TS-1)

Titanium-silicalite can be prepared by subsequent dealumination of ZSM-5 with hydrochloric acid and reaction with titaniumtetrachloride vapour at elevated temperatures. The titanium atoms are probably inserted into lattice vacancies which were formed upon acid leaching.     

一种合成ZnO压敏电阻陶瓷主料的新方法

以Zn(NO3)2为原料,采用NaOH为沉淀剂,制备氧化锌压敏电阻陶瓷主料ZnO。结果显示制备的ZnO均为纳米级,并通过调节控制酸碱度pH值、反应温度、反应溶液的浓度等,探索了实验的最佳条件。为今后采用共沉淀法制备氧化锌压敏电阻陶瓷复合粉体奠定了扎实的基础。     

A new method for preparation of nanoplates of Zn-Al layered double hydroxides

Methods for preparation of nanoplates of layered double hydroxides (LDHs) have been intensively investigated for the purpose of making nanocomposites. The present study provides a new simple method of nanoplate preparation for Zn-Al LDHs. Zn-Al LDHs containing lactate or combinations of lactate and simple inorganic anions were synthesized by a coprecipitation method, and water-washed and undried LDHs were dispersed in water. Among them, suspensions of Zn-Al LDHs containing both lactate and bicarbonate were unique in that they rapidly became translucent colloidal dispersions when the molar ratio of added bicarbonate to added Al was ≤ 0.5. The resulting LDH nanoplates in the dispersions were delaminated single layers or nanoplates with a thickness of several layers, depending on the amount of bicarbonate.     

A new modification method of exploded lignin for the preparation of a carbon fiber precursor

A lignin-pitch for carbon fiber was prepared in a high yield from exploded lignin on phenolysis followed by heat treatment under a vacuum. The lignin-pitch had an excellent spinnability in the melt state to form a fine filament. The green fibers were easily made infusible when heated in air at a relatively high heating rate (15-60°C/h). The lignin-based carbon fiber was produced in 43.7% of yield based on a starting material. The tensile strength was more than 400 MPa, indicating that the lignin-based carbon fiber is classified into a general purpose grade. © 1993 John Wiley & Sons, Inc.     

A simple new method for the determination of the Li/Nb ratio of LiNbO3 crystals

A simple new method based on holographic scattering is presented which allows the determination of the Li/Nb ratio of LiNbO₃ crystals. We illuminate the samples with laser light, measure the cone angle of the anisotropically scattered light and calculate from this angle the birefringence. First experimental results for the Li/Nb ratio of various LiNbO₃ crystals demonstrate the feasibilities of this method.     

一种纤维素粗酶制剂的制备方法

本文采用了无机盐与有机溶剂相结合的方法制备纤维素酶。TichodermakoningiP2固体培养基的抽提液中，加入4％氯化钙，就能达到硫酸按法的同样效果，除去酶液中的一些杂质。进一步沉淀酸时，与直接用有机溶剂沉淀比较，溶剂用量减少了30％．溶剂采用异丙醇较佳，粗酶制剂的产率以羧甲基纤维素酶活（CMCA）表示接近100％，使滤纸崩溃的能力与原酶液相似。     

A new method for the preparation of ultra-sharp V-notches to measure fracture toughness in ceramics

The preparation of an ultra-sharp V-notch on structural ceramics is a prerequisite for reliable fracture toughness assessment. Femtosecond lasers are used to cut ultra-sharp V-notch on the Si₃N₄ and Al₂O₃ ceramics for fracture toughness testing by single-edge V-notched beam method. The radius of the V-notch tip is smaller than 0.5 μm. The K_Ic of Si₃N₄ and Al₂O₃ ceramics determined by this method is much close to the actual fracture toughness. This method exhibits obvious advantage in good reproducibility, high accuracy and precision for reliable fracture toughness testing of structural ceramics.     

A new catalytic method for the preparation of bis-indolyl and tris-indolyl methanes in aqueous media

Some new metal dodecyl sulfates were prepared by the reaction of sodium dodecyl sulfate and the corresponding metal nitrates. All of the prepared salts catalyzed the condensation of indoles with aldehydes and ketones. Among of them, zirconium tetrakis(dodecyl sulfate), Zr(DS)₄, was superior to others. Bis- and tris-indolyl methanes were synthesized at room temperature in high yields by using Zr(DS)₄ under aqueous media. Zr(DS)₄ was also recovered and reused for new runs.     

超声辅助制备针状纳米活性碳酸钙的研究*

针状碳酸钙是一种质优价廉的新型无机填料,可广泛应用于塑料、橡胶、造纸等领域。以简化实验方法和节省能源为目的,采用超声辅助并选用合适的改性剂,合成和改性一体化进行了制备针状纳米活性碳酸钙的实验。综合考察了溶液浓度、改性剂用量、反应温度、加水量等反应条件,通过正交实验得到最佳反应条件：溶液浓度为0.05 mol/L、反应温度为60 ℃,改性剂用量为1.25%（质量分数）、加水量为60 mL、超声功率为250 W、搅拌速度为200 r/min。经过验证实验,最终制得平均粒径为150 nm、长径比为21.7、活化度为98.67%、吸油值为0.455 g/g的针状纳米活性碳酸钙。     

一种制备野黄芩苷的简单方法

研究灯盏花粗提物中野黄芩苷的制备工艺。通过酸沉法,从灯盏花粗提物中分离得到总黄酮沉淀物,以甲醇为溶剂进行结晶,得到野黄芩苷。结果表明,灯盏花粗提物酸沉pH为1.5,灯盏花总黄酮得率为3.27%,经高效液相色谱检测,所得一次、二次沉淀中野黄芩苷含量分别为92.0%和87.9%,甲醇结晶得到的野黄芩苷含量为94.7%。     

硝酸与金属铜反应制备硝酸铜新工艺研究

在硝酸溶解金属铜的过程中，加入过氧化氮，控制反应条件，既解决了制备硝酸铜不冒黄烟（二氧化氮）污染环境的问题，又改变了传统工艺的减压浓缩等工序，不仅节约了硝酸而且简化了工艺。     

四溴化碳的制备

向次溴酸钠溶液中滴加适量的丙酮,在四丁基溴化铵催化下,高产率得到四溴化碳。