水基植物胶压裂液用交联剂类型及性能

介绍了水基植物胶压裂液所用各种交联剂的交联机理,评价了交联剂的耐温性、抗剪切性、延迟交联特性、滤失性、破胶化水性能及岩心渗透率伤害性。不同类型的交联剂适用于不同温度、不同条件的油藏。有机硼和有机硼锆交联剂在高温地层中应用性能优于硼砂和有机过渡金属交联剂。     

脱硫醇活化剂的制备及其研究

以氯化十八烷基二甲基苄基胺、吗啉、N-甲基二乙醇胺为主要原料制备原油脱硫醇活化剂,并对该活化剂应用于原油的脱硫醇效果进行了研究。实验结果表明,该活化剂有效浓度高,对原料油适应性强,可将原油中硫醇的含量从95μ/g降低到2～12μg／g,效果明显,且该活化剂既适合预制型催化剂,也适合浸渍型催化剂,能保证催化剂活性高,寿命长,处理后的汽油质量明显提高。     

铣削内半球加工的宏程序

通过对华中数控系统宏程序充分发掘，顺利实现了内半球的铣削加工。该方法通过在G17平面内用G02指令，G18平面内用G03指令，在G17和G18平面内交替铣削，直到完成加工。     

SC－1型植物胶压裂液研究及应用

压裂改造是低渗透油藏油井增产和提高原油采收率的重要措施。压裂效果的好坏与压裂液的性能息息相关，目前国内常用的田菁胶与改性田菁胶压裂液残渣含量较高，对地层伤害较大。本文提出一种优于田菁胶类的新型压裂液——ＳＣ－１型植物胶压裂液，它具有耐温性能好、携砂能力强、滤失低、破胶化水彻底、残渣含量低、对地层伤害小等特点，适合于地层温度为８０℃～１４０℃的油层进行压裂改造，该压裂液已在现场应用一百余井次，取得了较好的经济效益。     

壳聚糖对百香果醋澄清作用的影响研究

以壳聚糖为澄清剂对百香果醋进行澄清处理,研究了壳聚糖用量、澄清温度和澄清时间对澄清效果的影响。确定了适宜澄清条件为:壳聚糖用量0.1 g/L、澄清温度40℃、澄清时间90 min。利用壳聚糖澄清百香果醋能较好地避免二次混浊现象。     

G02/G03在数控编程中的快速判定

在数控手工编程学习中,对圆弧编程中顺时针G02插补与逆时针G03插补,常常理解错误,导致所编程序与实际加工路线相反.根据数控编程标准,圆弧插补指令描述如下:     

Preparation of ITO nano-powders by hydrothermal-calcining process

1 INTRODUCTIONSn-doped In2O3(ITO) is one kind of n-typesemiconductor material[1].It has excellent electro-optical properties , such as electrical conductivityand high transparency under visible light[2],andiswidely used in electronic , transparent electrode ,solar cells and electro-irradiance , especially inscreen display[3 ,4].Recently nearly half of the met-al indium has been used to prepare ITO materialsin the developed countries[5], such as Japan, A-merica ,France and so on.So the…     

Synthesis of mesoporous cerium-zirconium mixed oxides by hydrothermal templating method

Mesoporous cerium-zirconium mixed oxides were prepared by hydrothermal method using cetyl trimethyl ammonium bromide （CTAB） as template. The effects of amount of template, pH value of solution and hydrothermal temperature on mesostructure of samples were systematically investigated. The final products were characterized by XRD, TEM, FT-IR, and BET. The results indicate that all the cerium-zirconium mixed oxides present a meso-structure. At molar ratio of n（CTAB）/n（（Ce）＋（Zr））= 0.15, pH value of 9, and hydrothermal temperature of 120 ℃, the samples obtained possess a specific surface area of 207.9 m^2/g with pore diameter of 3.70 nm and pore volume of 0.19 cm^3/g.     

Solvothermal preparation and characteristics of Sn-doped In2O3

Sn-doped In2O3 （ITO） nanopowders were prepared in ethanol solvent by solvothermal process. The effects of the solvothermal temperature, coprecipitation pH value and SnO2 content on the products phase and microwave absorption were investigated by X-ray diffractometry and microwave reflectance. ITO nanopowders with cubic structure can be respectively prepared at 250 and 270 ℃ for 6 h. The prepared product is InOOH or the mixture of InOOH and In3Sn4O12 when the solvothermal temperature is below 250℃. With rising solvothermal temperature and prolonging time, the absorption of the ITO powders gradually decreases. The products are ITO nanopowders by coprecipitating at pH=9 or 11, but ITO powders with Sn3O4 at pH=6. The absorption of powders prepared at pH=6 is better than that at any other pH value. The products are all ITO nanopowders and crystal size reduces with increasing SnO2 content. The microwave absorption of ITO nanopowders with SnO2 content of 8% （mass fraction） is the best among samples with different SnO2 contents.