Advanced Materials Research Vols. 1033-1034

Abstract: Iron phthalocyanine was prepared by the reaction of phthalic anhydride, urea and ferrous chloride by means of the solvent method with dioctyl phthalate as solvent, ammonium molybdenate as a catalyst and ammonium chloride as promoter. The reaction was carried out in the conditions that 2 hours was required for the first stage at the temperature of ca. 403 K and 6 hours was required for the second stage at the temperature of ca. 453 K. The yield of the product reached of 77%. Along with the use of dioctyl phthalate as solvent for the reaction for producing iron phthalocyanine, the whole production process could become more friendly to the environment compared with the traditional methods with trichlorobenzene, nitrobenzene or other substances as the solvent.

Abstract: bis(2-chloroethoxy)methane was synthesized by the reaction of ethylene chlorohydrin and Oligopolyformaldehyde under sulfuric acid catalysis. optimum reaction conditions obtained were as follows: the molar ratio of Oligopolyformaldehyde and ethylene chlorohydrin of 1.2:2, catalyst dosage was 5‰mass fraction of ethylene chlorohydrin, toluene were chose as water-carrying agent, All reactant were refluxed on temperature of 110°C until no water generated. Under the optimum conditions the yield of bis(2-chloroethoxy)methane was 97.7%. The structure of bis(2-chloroethoxy)methane were conformed by ATR IR. The purity of bis(2-chloroethoxy)methane were 99% by gas chromatographic detection.

Abstract: Calculating methods of inhibitor concentration leading to yield 50% inhibition (IC50) of competitive inhibitor, noncompetitive inhibitor and mixed inhibitor were proposed on the basis of kinetics of enzyme inhibition, and were applied to calculate IC50 value of concerned compounds, such as cinnamic acid, cinnamaldehyde, benzoic acid and et al. The calculating results of competitive inhibitor, noncompetitive inhibitor and mixed inhibitor are similar to experimental data, and the average errors are only 3.7%, 2.4%, 4.6%, respectively. The calculating method is confirmed to be reliable by the results.

Abstract: The reduction of aromatic nitro compounds to corresponding azoxy compounds with sodium borohydride was catalyzed by BiO(OH)/actived carbon (AC), which was prepared by equivalent-volume impregnation. The influences of catalyst, sodium borohydride and sodium hydroxide amount were investigated with 10 mmol of nitrobenzene as substrate in methanol at room temperature. The suitable reaction conditions are as follows: 0.2 g of catalyst, 10 mmol of sodium borohydride and 0.1 g of sodium hydroxide. Under the conditions, the seven aromatic nitro compounds were reduced to corresponding azoxy compounds with 27%-90% yields. Moreover, slight deactivation was observed after nine cycles of the catalyst.

Abstract: Main reasons, of which viscous crude emulsion and chemical flooding emulsion are difficult to demulsify, is that their compositions and structures have tremendous differences to water flooding emulsion. To resolve main difficulties encountered in demulsifier research today, such as demulsification of viscous crude oil emulsion, demulsification of chemical flooding emulsion, some research value routes, such as increasing aromaticity, molecular weight and branch degree of demulsifier molecule, and leading double-function groups meeting W/O type and O/W type emulsion and groups with alkyl carbon number matching equivalent alkyl carbon number of the crude oil into demulsifier molecule, were suggested according to demulsification mechanisms and their emulsion characteristics, and action mechanisms of the above-mentioned research routes were elaborated at the same time.

Abstract: Four anionic maleic monoester carboxylate polymeric surfactants were synthesized by the reaction of maleic anhydride with linear alcohols of different chain length in the ratio of 1:1.1 under 80 °C. Then the intermediate products were neutralized by sodium hydroxide at 60 °C to produce the final monomers. The structures of products were confirmed by FTIR. The surface tension was measured at 45 °C and the thermodynamic parameters were calculated. The results show that the polymeric surfactants possess low critical micelle concentration (CMC), high adsorption affinities and good surface and interfacial activity.

Abstract: Amyl ferulate was synthesized by direct esterification with using sodium bisulfate supported by silica as a catalyst, ferulic acid and n-pentanol as raw materials. The influences of some factors on the synthetic process were studied. The optimal reaction conditions based upon 0.2 mol of ferulic acid were chosen that the molar ratio of n-pentanol and ferulic acid was 2 : 1, the mass ratio of catalyst to reactants was 6%, refluxing reaction time was 3 hours. The yield of the product reached 97% under the above conditions. The structure of the product was characterized by IR, 1H NMR and MS spectrum. The catalyst could be recycled and used for many times.

Abstract: The synthesis, blocking and unblocking technologic conditions of hydrogel polyurethane were researched. The results showed that it would improve the bonding strength of hydrogel polyurethane when the hydrophilic polyether polyol was mixed with lipophilic polyether polyol of 10%. And the prepolymer of water-soluble polyurethane was achieved with hydrophilic polyether polyol and lipophilic polyether polyol as the materials at a prepolymerization reaction temperature of 85°C with TDI and reaction time of 180min. Then the preferable result could be got at a choice of phenol as sealant which was used to seal the water-soluble polyurethane active group, n (-NCO):n (-OH)=1:1.2, dosage of dibutyltin dilaurate as catalyst of 0.3%, unblocking in hot water.

Abstract: 3-O-caffeoyl-quinide, a dehydration compound of 3-O-caffeoylquinic acid, was obtained using p-toluenesulfonic acid as a catalyst via esterification in traditional organic solvent and transesterification in ionic liquid, respectively. The quinide, identified by ¹H-NMR spectrum, was prepared as an intermediate product for the synthesis of 3-O-caffeoyl-quinide, and the products was identified by LC-MS. Results indicated that the developed purification method of quinide was much simple than before with a higher yield, and [Bmim][Tf₂N] was selected as the suitable reaction medium.