Showing papers in "Science & Technology in Chemical Industry in 2008"

Production and market prospects of chloroparaffin-70

Abstract: Production status,preparating technology,uses and market prospects of the chloroparaffins-70 at home and abroad were introduced in this paper.In view of the problems presanted in chloroparaffins-70 trades,some development proposals were put forward.

Hazard analysis of petroleum pollutants in soil

Abstract: Petroleums are widely used in many sections of our life,most of them are inevitably discharged into the soil in use and production process,which can pollute environment.In this paper,the origin and the existence state of petroleums in soil are briefly introduced,the enormous pollution to soil are completely summarized,the effects of petroleum pollutants to animal,plant and human are also analyzed at length.So whatever from the point of environmental pollution or economical development, it is very important to know about environmental safety of petroleum in soil.

Study on technology for the synthesis of n-butyl lactate

Abstract: Lactic acid and n-butanol were used to prepare n-butyl lactate,the reaction waseatalyzed by sodium bisulfate,vitamin C,ferric chloride and ammonium ferrous sulfate.The effects of the kinds and amounts of catalyst,reaction time and the amounts of n-butanol on esterification reaction were dis- cussed.The products were characterized by IR and index of refraction.The results showed that the es- ter yield is higher than 85.2% under the optimum preparation conditions:0.25 g sodium bisulfate is used as catalyst,the mole ratio of lactic acid and n-butanol is 1:3.5 with refluxing for 2 h.

Present situation and prospect on bioenergy of solid-state and liquid-state

Abstract: This article elaborated that how bioenergy to solve the problem of energy crisis and environmental pollution.It introduced the application and existed problems of biodiesel,fuel ethanol and biomass pellet fuel at home and aboard.It also looked forward to the development of bioenergy in the future.

Study on maleic anhydride grafted low molecular weight polyethylene

Abstract: A byproduct of high-molecular polyethyene from polyethylene unit of Jilin Petrochemical Company was modified by graft copolymerization with maleic anhydride(MAH).The effects of monomer,the amount of initiator,grafting time and temperature on the qrafting ratio were investigated.The low M_W PE grafted could be used in the filling system of PE/ CaCO_3 to enhance the affinity between polyethene and calcium carbonate,resulting in the improved properties of the system.

The application of low-temperature-inhibitor in corrosion control for CDU overhead

Abstract: Along with processing much Russian crude oil in Jilin Petrochemical Co.Refinery,the corrosion control in CDU overhead has become more complexity rencent years.The article described the mechanism of corrosion inhibition and the corrosive position of CDU overhead,and proposed the countermeasures for solving the problems.Using the effective neutralizer and inhibitor program,We have gotten good effects.

Optimal control of the tubular furnace

Abstract: In recent years,the tubular furnace technology has been more and more aroused people's attention with the rapid development of chemical industry.The tubular furnace consumes a large amount of energy.The author introduced the solution of some practical problems by On-line Optimization in xylene devices as follows.some fire nozzles smoking,high excess air number.The computer-controlled of furnace oxygen content and furnace subpressure were to be achieved and the burning efficiency of the furnace was increased.

Improvement in condition filter experiment for determination of the iron by phenanthroline spectrophotometry

Abstract: Condition filter experiments for determination of the iron by phenanthroline spectrophotometry in the genral textbook are single factor experiments,and there are some problems in the experimental designMultivariate condition filter experiments can develop thoughts commendably,on the condition of pH,developer dosage and developering time changing at the same time,there are some phenomenons in the improved experiment,such as:the color reaction velocity is slow and the reaction can not proceed completely when pH value was under 3;the colors of solutions fade gradually when pH value was over 9;etcFirstly giving the reasonable explanation to the experimental phenomena, then designing verification experiment and verifing,by this way,the efficiency of experimental teaching increased

The technology of preparation of fuel oil from polypropylene and its waste by catalytic cracking

Abstract: The effects of various reaction factors of fuel oil from polypropylene waste by various catalysts are studied,such as temperature,pressure and so onOn the laboratory condition,using self-making ZSM-5 zeolite as catalyst,we have produced liquid product from material contains 70%～80% fuel oil,and the yield of gasoline is 40%～50% of fuel oil

Production situation and market analysis of MIBK at home

Abstract: The methyl isobutyl ketone(MIBK) is mainly used for solvents and rubber agents.China is an important country for consumption of MIBK.This paper introduced the production situation, process technology consumption,import and export and price trend.Domestic market supply and demand of MIBK were significantly analyzed.Finally,some proposals were put forward on production and development of MIBK in China.

The preparation of chitosan and its application in waste water treatment

Abstract: Micron narrow distributing porous chitosan microspheres were prepared with paraffin liquid as dispersed phase and gitaraldehyde as crosslinking agentTheir adsorption properties for acidity metal ions of waste wate were also investigatedThe adsorption kinetic curve and isotherms were measuredThe preparation methods of porous chitosan and its applications in waste water treatment are reviewedThe result showed that adsorption of acidity metal ions of waste wate the Langmuir equation and is nearly 100 % when pH in acidity waste wate solution was 2～5

Research advance on the chemical reaction of HDI

Abstract: HDI's molecular structure is a special saturated straight chain and it has highly unsaturated double bonds(isocyanate group).It has such very lively and chemical properties that can be used to form polyurea with water.And it also reacts with polyurethane to form polyol,reacts with amine to bi- uret.Ontology reactions occur under the catalyst.HDI and its HDI-derivatives own the characteristic of stability,being widely used in coating,adhesive,leather,and other fields.This article reviews the ex- perimental and theoretical studies relating to the chemical reaction of HDI.

Application of organosilicon high-boiling components

Abstract: Organosilicon high-boiling components was by-product from direct synthesis of methylchlorosilanes,The routes for production of monosilane,silicone oil,organosilicon water-proof agent,defoaming reagent,ceramics,organosilicon resin from the high-boiling components and their technical features were outlined,and some suggestions on development direction of catalysis cracking were put forward.