Showing papers in "Science & Technology in Chemical Industry in 2011"
Journal Article•
TL;DR: In this paper, water-based fracturing fluid from a petrochemical company effluent treatment plant, on the basis of the analysis on the water characteristics,putting forward preoxidation-coagu-flocculation-ozone deeply oxidation composite process.
Abstract: Fracturing liquid contains lots of organic additive,complicated composition,high COD,difficult to handle.This experiment research object is water-based fracturing fluid from a petrochemical company effluent treatment plant,on the basis of the analysis on the water characteristics,putting forward preoxidation-coagu-flocculation-ozone deeply oxidation composite process.The results show that after preoxidation-coagu-flocculation treatment,the CODOH-KI removal is 82.3%,then using ozone for deeper oxidation,CODOH-KI removal is 86.5%,fracturing Liquid has a good treatment effect.
5 citations
Journal Article•
TL;DR: The production capacity, output and import/export,application and market of WCB at home and abroad were briefly reviewed and the present problems and development trend for WCB industry were also put forward in this paper.
Abstract: White carbon black(WCB) is white powder,it includes amorphous silicic acid and some silicate productsWCB is widely used in many fields because of its excellent propertiesIts production technologies including precipitation method and gas phase method were briefly introduced,The production capacity,output and import/export,application and market of WCB at home and abroad were briefly reviewed and the present problems and development trend for WCB industry were also put forward in this paper
2 citations
Journal Article•
TL;DR: In this article, numerical simulations were performed to study the flow characteristics of gas and water impinging streams through the FLUENT software by controlled volume numerical analysis, which showed that strong turbulent flow is formed during the impinging process which provides excellent conditions for mass transfer intensification.
Abstract: To study the effect of impinging stream technology on the degradation of organic pollutants in wastewater by advanced oxidation,numerical simulations were performed to study the flow characteristics of gas and water impinging streams through the FLUENT software by controlled volume numerical analysis.A two-phase-fluid mathematic model of k 1-e 1-k b-e b method was also established to further study the flow characteristics of a two-phase-fluid impinging stream.The simulating results showed that strong turbulent flow is formed during the impinging process which provides excellent conditions for mass transfer intensification.The strong mutual-permeability of gas and water also indicated that the impinging stream technology is effective and viable to intensify the mass transfer process of wastewater treatment by advanced oxidation.
1 citations
Journal Article•
TL;DR: In this paper, the preparation process of vanillin from guaiacol and glyoxylic aid was investigated, and the condersation reaction conditions including reaction temperature, pH valve of reaction solution, raw material feeding way were optimized.
Abstract: The preparation process of vanillin from guaiacol and glyoxylic aid was investigated.The condersation reaction conditions including reaction temperature,pH valve of reaction solution,raw material feeding way were optimized.The oxidation reaction conditions including catalyst,reaction time,temperature and so on were also optimized.Under these conditions the total yield of vanillin can reach 75%,purity of product is over 99%.This technology,has been close to the advanced level in the world and it has established the foundation for realizing industrialization.
1 citations
Journal Article•
TL;DR: In this article, the optimal conditions for the transesterification of high-acidity waste cooking oil catalyzed by concH2SO4 were found to be reaction time of 5h, reaction temperature of 60 ℃, dosage of concH 2SO4 11,molar ratio of methanol to oil 9∶1Sodium methoxide was used as catalyst in preparing biodiesel in the research.
Abstract: The process for the transesterification of high-acidity waste cooking oil catalyzed by concH2SO4 was studied firstlyThe optimal conditions were found to be reaction time of 5h,reaction temperature of 60 ℃,the dosage of concH2SO4 11%,molar ratio of methanol to oil 9∶1Sodium methoxide was used as catalyst in preparing biodiesel in the researchReaction time,reaction temperature,the dosage of sodium methoxide,and ratio of methanol to oil were chosen as four important factors affecting the biodiesel yieldThe optimal conditions were obtained after reaction at 65 ℃ for 2 h when 08% sodium methoxide and 7∶1 mole ratio of methanol to waste oil were usedThe biodiesel obtained may reach the ASTM standards with low cost and simpler technology
1 citations
Journal Article•
TL;DR: The results showed that the purity of total saponins of Gymnema sylvestre was raised to 51.07% from 25.33% and the recovery was 83.26% as discussed by the authors.
Abstract: Total saponins of Gymnema sylvestre were separated and enriched with macroporous resins.The adsorption capacity and adsorption ratio of five kinds of adsorption resins for total saponins in extraction of Gymnema sylvestre were investigated.The results of saturated static adsorption of different types of resins showed that D101 was suitable for the separation of total saponins.Further,the concentration and pH of total saponins of Gymnema sylvestre in solution,flow rate,the concentration of the elution reagent were optimized.The results showed that the purity of total saponins of Gymnema sylvestre was raised to 51.07% from 25.33% and the recovery was 83.26%.Total saponins of Gymnema sylvestre was enriched effectively.
1 citations
Journal Article•
TL;DR: In this article, a modified hyperbranched polyamidoamine (PAMAM) is used as a flocculant for waste water treatment, it was prepared by modification of its end groups with terminal cationic modified by using three kinds of Cationic monomer in Michael addition.
Abstract: Modified hyperbranched polyamidoamine(PAMAM) is used as a flocculant for waste water treatment,it was prepared by modification of its end groups with terminal cationic modified by using three kinds of cationic monomer in Michael addition.Impact of PAMAM modified reaction on the flocculation performance was analyzed with alkaline-surfactant-polymer(ASP)flooding fields simulated wastewater,and the modified structure of the product was characterized by IR.Experiment results showed that the preferred cationic monomer was methacryloyloxyethyl trimethyl ammonium chloride(DMC),the reaction was carried out at 60 ℃ for 36 h,m(DMC)∶ m(PAMAM)=1.2∶1,under the optimum condition,the flocculanting properties of the obtained product(PAMAM-DMC)was best.
1 citations
Journal Article•
TL;DR: SiO2 Inorganic membrane was prepared on Al2O3 wafer substrates by sol-gel method using tetra ethyl orthosilicate(TEOS) and water as raw material,ethanol as a solvent, HCl as catalyst and DMF as additive as discussed by the authors.
Abstract: SiO2 Inorganic membrane was prepared on Al2O3 wafer substrates by sol-gel method using tetra ethyl orthosilicate(TEOS) and water as raw material,ethanol as a solvent,HCl as catalyst and DMF as additiveThe effects of pulling speed,the concentrations of sol and method of coating membrane on the performance of membranes were systematically analyzedResults showed that pulling speed at 6cm per minute can get a better coating;higher ratio of EtOH to TEOS with a longer period of coating membrane can improve the combination properties of membranes;in addition,coating membranes with the alternation of concentrated sol and diluted sol can effectively improve the performance of membranes
1 citations
Journal Article•
TL;DR: In this paper, the principles of process intensification, research and application for micro-chemical technology were described, where the authors focused on the study of the microchemical systems whose characteristic length is between microns and hundreds of microns.
Abstract: Micro-chemical technology is an interdisciplinary science and technology frontier originating in the early 1990s.The high technology incorporates micro-electromechanical design idea into the basic principles of chemistry and chemical engineering,and includes integrated circuits and micro-sensor manufacturing techniques.It is related to different engineering technology and discipline including chemistry,materials,physics,chemical engineering,mechanics electronics,control science and so on.This technology focuses on the study of the micro-chemical systems whose characteristic length is between microns and hundreds of microns.In this paper,principle of process intensification,research and application for micro-chemical technology were described.
1 citations
Journal Article•
TL;DR: Yeast adsorbents in wastewater treatment will be more and more widely applied with the development of related technologies as discussed by the authors, and have a strong tolerance to heavy metals, low pH and other external conditions.
Abstract: As a biological adsorbent,yeasts are easy abtainable、 inexpensive,and have a strong tolerance to heavy metals,low pH and other external conditions.The advantages of yeasts,especially immobilized yeasts for adsorbing heavy metal ions from wastewater,are not only with low cost,high efficiency,strong adsorbent regenerating ability,but also with liable recovery to the heavy metals adsorbed.With the development of related technologies,yeast adsorbents in wastewater treatment will be more and more widely applied.
1 citations