涠洲XX油田清防蜡工艺研究与应用

针对涠洲XX油田AX井的结蜡情况,为了快速有效的解决该井的结蜡问题,对防污染热洗清蜡技术及化学防蜡技术进行了研究并成功应用。采取热洗清蜡及化学防蜡相结合的方式有效的解决了AX井的结蜡问题,采取化学防蜡前产油量平均20m3/d,热洗清蜡后采取化学防蜡措施,产油量一直维持在42m3/d,目前已稳产4个多月,避免了结蜡对油井产量的影响,使采油效率提高到化学防蜡前的2倍多。     

(Ni-W)-纳米Si3N4复合电镀工艺的研究

研究了(Ni-W)-纳米Si3N4复合镀层的共沉积条件,考察了电流密度、温度和时间等操作条件对镀层沉积速率和显微硬度的影响.结果表明,随着电流密度提高,复合镀层的沉积速率和硬度不断增加,但当电流密度达到16 A/dm2,镀层的硬度下降;合适的镀液温度为75℃左右,沉积时间约60 min.     

N，N＇－二安替比林－1，6－己二酰胺的合成及表征

采用一步法首次合成了Ｎ，Ｎ＇－二安替比林－１，６－己二酰胺（ＢＡＰＨＤＣＡ），通过元素分析，ＵＶ、ＩＲ光谱和１ＨＮＭＲ谱分析对其结构组成进行了确认和表征，并考察了它在几种常见溶剂中的溶解性。     

Nano-alumina coated with sodium dodecyl sulfate and modified with 4-(2-Pyridylazo) resorcinol for extraction of heavy metals in different matrixes

A green, novel and efficient solid phase extraction method based on the use of nano-alumina (nano-Al₂O₃) coated with sodium dodecyl sulfate (SDS) and modified with 4-(2-Pyridylazo) resorcinol (PAR) as a new adsorbent was developed for separation and preconcentration of trace amounts of Ni, Pb, Cu and Zn ions prior to determination by inductively coupled plasma-optical emission spectrometry (ICP-OES). Under the optimum conditions (eluent: HNO₃, 4.0 mL, 3.0 mol L⁻¹; adsorbent: 0.8 g of nano-Al₂O₃, 40 mg of SDS, 8.6 mg of PAR; and sample: pH 6, flow rate 2.0 mL min⁻¹), adsorption capacity of nano-Al₂O₃-SDS-PAR, enrichment factors and limits of detection for the analytes were 8.7–12.9 mg g⁻¹, 125–250, and 0.12–0.71 μg L⁻¹, respectively. The proposed method presented excellent repeatability with relative standard deviations less than 1.6% (n = 10), and calculated calibration curves gave good level of linearity with correlation coefficient values between 0.989 and 0.999. Finally, the feasibility of the method was evaluated by extraction and determination of Ni, Pb, Cu and Zn ions in rice seed, apple juice, coriander, lettuce and tap water samples.     

Catalytic activity of copper(II)complexes of immobilized ‘polystyrene-bound 4-(N,N-dimethylamino)pyridine’ for the oxidative coupling of 2,6-disubstituted phenols

‘Polystyrene-bound 4-(N,N-dimethylamino)pyridine’-copper (PS-DMAP-Cu(ii)) catalysts for the oxidation of 2,6-disubstituted phenols were immobilized by grafting or by partial adsorption on silica and by crosslinking with 2% divinylbenzene. The most active immobilized catalyst is the most flexible, i.e. the grafted one, which however is still six times less active than unbound linear PS-DMAP-Cu(II). The less extended conformation of the adsorbed polymeric catalyst exhibits a significantly lower activity. For the crosslinked catalyst, indications were obtained that diffusional limitations occur. Application of all three types of immobilized PS-DMAP based catalysts in a continuous stirred tank (CST) reactor was unsuccessful. The phenol conversion drastically decreased in time. This loss of activity could be explained by the destructive effect of water: interaction of reaction water with the very basic DMAP ligands may result in the production of an excess of hydroxide which, according to our earlier work, deactivates the catalyst. A catalyst based on the less basic poly(styrene-co-4-vinylpyridine) adsorbed onto silica exhibited an invariable phenol conversion in the CST reactor for at least 230 h.