Study of Manufacturing High Pure Chlorine Dioxide with Multi-Stage Compound Chlorine Dioxide Generator

2012 ◽  
Vol 550-553 ◽  
pp. 3125-3130
Author(s):  
Ji Ku Zhang ◽  
Lu Lu Dai ◽  
Wei Tan
Keyword(s):  
Chlorine Dioxide ◽  
Mass Fraction ◽  
Raw Materials ◽  
Bath Temperature ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Multi Stage ◽  
The Status ◽  
Pressure Concentration ◽  
Technical Basis

Based on the status that conversion rate of Single-stage compound chlorine dioxide generator is not high in the market，we designed a multi-stage compound chlorine dioxide generator and discussed the best reaction conditions. At the same time ,we also focused on the reaction temperature, reactor pressure, concentration of raw materials and raw materials ratio on the performance of generator. The results show that the best reaction conditions of water bath temperature was 70°C、gas pressure was 60 ml • min-1、mass fraction of HCl was 24%、mass fraction of NaClO3 was 26%、Molar ratio of HCl and NaClO 3was 3. Under these conditions, the Index ,such as production of ClO2、production of effective chlorine、yield and purity of ClO2、consumption rate of NaClO3 and the ratio of ClO2/Cl2,reached a higher level, providing the technical basis for the mass production of Multi-stage compound chlorine dioxide generator.

A New Technological Study on Synthesis of Bis(2-chloroethoxy)Methane

2014 ◽  
Vol 1033-1034 ◽  
pp. 7-11
Author(s):  
Yan Bai ◽  
Xuan Tang ◽  
Kui Zhou ◽  
Cun She Zhang
Keyword(s):  
Mass Fraction ◽  
Acid Catalysis ◽  
Molar Ratio ◽  
Optimum Conditions ◽  
Reaction Conditions ◽  
Ethylene Chlorohydrin ◽  
Optimum Reaction ◽  
Chromatographic Detection ◽  
Catalyst Dosage ◽  
Technological Study

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.

Synthesis of Benzaldehyde 1, 2-Propanediol Acetal by Using Ionic Liquid [Hmim]HSO4 as Catalyst

2012 ◽  
Vol 550-553 ◽  
pp. 400-403 ◽  
Author(s):  
Xue Nan Sun ◽  
Li Cui ◽  
Tong Kuan Xu ◽  
Da Zhi Wang
Keyword(s):  
Ionic Liquid ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Raw Materials ◽  
Product Yield ◽  
Experimental Results ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Good Catalyst ◽  
Optimal Reaction

Benzaldehyde 1, 2-propanediol acetal was synthesized from benzaldehyde and 1, 2-propanediol in the presence of ionic liquid [HMIM]HSO4. The effect of the amount of catalyst, reaction time, reaction temperature, and the molar ratio of raw materials agent on the product yield was investigated respectively. Experimental results demonstrate that ionic liquid [HMIM]HSO4is a good catalyst for preparation of benzaldehyde 1, 2-propanediol acetal. Results showed the optimal reaction conditions are as follows: the mole ratio of benzaldehyde to 1, 2-propanediol is 1：1.3, the amount of catalyst is 3.0g, the reaction temperature is 343K, and the reaction time is 4h. The achieved yield of acetal is 78. 7%.

Preparation of Polycarboxylate Terpolymer High Performance Water Reducer of MA-AA-F108

2012 ◽  
Vol 581-582 ◽  
pp. 246-251
Author(s):  
Jia Le Song ◽  
Hong Ping Wen ◽  
Chang Liang Lv ◽  
Zhi Mi Zhou ◽  
Wei Guang Li
Keyword(s):  
Aqueous Solution ◽  
Mass Fraction ◽  
High Performance ◽  
Raw Materials ◽  
Molar Ratio ◽  
Optimum Conditions ◽  
Oxidation Reduction ◽  
Initiator System ◽  
Dispersing Ability ◽  
Polymerization Conditions

In aqueous solution, the modified polyether (F108), maleic anhydride (MA), acrylic acid (AA) as raw materials, a novel polycarboxylate high performance water reducer of MA-AA-F108 was synthesised from free radical copolymerized through oxidation-reduction initiator system. Additionally, the polymerization conditions were optimized. The results indicate that the copolymer can be prepared under such optimum conditions, i.e., 3:3:2 molar ratio of MA, AA and F108, 0.5% of the mass fraction of oxidation initiator, 0.6% of the mass fraction of reduced initiator and 0.3% of the mass fraction of regulator, the results showed that the polyether-type polycarboxylic water reducer has excellent dispersing ability.

A Novel Process for Synthesis of Cyclohexyl Ferulate

2013 ◽  
Vol 781-784 ◽  
pp. 283-286
Author(s):  
Xiang Wen Kong ◽  
Han Wang ◽  
Zhao Jing Li ◽  
Jing Zhang
Keyword(s):  
Reaction Time ◽  
Ferulic Acid ◽  
1H Nmr ◽  
Raw Materials ◽  
Molar Ratio ◽  
Synthesis Process ◽  
Mass Ratio ◽  
Reaction Conditions ◽  
Sodium Bisulfate ◽  
Optimal Reaction

Cyclohexyl ferulate was prepared by direct sterification of ferulic acid and cyclohexanol as raw materials with sodium bisulfate supported by silica as a catalyst. The influences of some factors on the synthesis process were studied. The optimal reaction conditions based upon 0. 2 mol of ferulic acid were chosen that the molar ratio of cyclohexanol and ferulic acid was 10 : 1, the mass ratio of catalyst to reactants was 5%, refluing reaction time was 3.5 hours, et a1. The yield of the product reached 80%. The structure of the product was characterized by IR, 1H NMR and MS spectrum. The catalyst could be recycled and used for many times, which is friendly to the environment.

Synthesis and Properties of Esters of Amino Acids' Composite and Palmityl Alcohol

2014 ◽  
Vol 900 ◽  
pp. 301-305
Author(s):  
Xiao Hui Wang ◽  
Xi Hua Du ◽  
Li Min Dong
Keyword(s):  
Amino Acids ◽  
Reaction Time ◽  
Phase Transfer ◽  
Foam Stability ◽  
Raw Materials ◽  
Rapeseed Meal ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Alcohol Effects ◽  
Hydrolysis Of

Concentrates of composite of amino acids based on hydrolysis of rapeseed meal were used to prepare esters of amino acids composite and palmityl alcohol. Effects of the ratio of raw materials, reaction time, water carrying agent and catalyst on synthesis of products were investigated. Surface-activity of these products have been also characterized. The optimums of reaction conditions were obtained. The results showed that molar ratio of palmityl alcohol and amino acids composite was 1:2, and toluene was as water carrying agent, and reaction temperature was 110°C-125°C, and the reaction time was 4 h, and mass dosage of high concentrated H2SO4 as catalyst was 12% of amino acids composite, and a small amount of polyethylene glycol (PEG600) was as phase transfer catalyst. The prepared product has a good foam stability.

Synthesis of Amyl Ferulate Catalyzed by Sodium Bisulfate Supported by Silica

2014 ◽  
Vol 1033-1034 ◽  
pp. 30-33
Author(s):  
Xiang Wen Kong ◽  
Huan Wang ◽  
Han Wang ◽  
Li Li Ren ◽  
Zhao Jing Li
Keyword(s):  
Reaction Time ◽  
Ferulic Acid ◽  
Raw Materials ◽  
Molar Ratio ◽  
Mass Ratio ◽  
Reaction Conditions ◽  
Synthetic Process ◽  
Direct Esterification ◽  
Sodium Bisulfate ◽  
Optimal Reaction

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.

Preparation and Wastewater Treatment of Polymeric Aluminum Chloride from Coal Gangue

2012 ◽  
Vol 518-523 ◽  
pp. 780-783
Author(s):  
Rui Gang Wang ◽  
Yun Ling Xin
Keyword(s):  
Aluminum Chloride ◽  
Raw Materials ◽  
Acid Leaching ◽  
Coal Gangue ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Roasting Temperature ◽  
Better Than ◽  
Waste Coal ◽  
The Ideal

The preparation of polymeric aluminum chloride(PAC) uses industrial waste coal gangue as raw materials was studied. The effects of reaction conditions such as roasting temperature, acid molar ratio, concentration of hydrochloric acid and acid leaching time were studied, the ideal reaction conditions for the preparation of PAC was determined. The result of the experiment for treating wastewater shows that the performance of PAC prepared from coal gangue is much better than that of commercial PAC.

Preparation and Application of P-Mo-W Heteropoly Acid Catalyst

2013 ◽  
Vol 838-841 ◽  
pp. 2374-2378
Author(s):  
Jun Deng ◽  
Xue Jun Zhu ◽  
Shuai Xie
Keyword(s):  
Hydrogen Peroxide ◽  
Mass Fraction ◽  
Heteropoly Acid ◽  
Sodium Tungstate ◽  
Raw Materials ◽  
Glyoxylic Acid ◽  
Sodium Molybdate ◽  
Acid Catalyst ◽  
Molar Ratio ◽  
The Impact

the phosphorus-molybdenum-tungsten heteropoly acid catalyst is prepared from such raw materials as phosphoric acid, sodium molybdate, sodium tungstate and characterized by infrared spectrum. Glyoxylic acid is prepared by catalytic oxidation of glyoxal in the presence of the self-prepared heteropoly acid catalyst and oxidizing agent hydrogen peroxide. The impact of catalytic reaction temperature, added catalyst, and use level of the hydrogen peroxide on the reaction for synthesizing the glyoxylic acid is investigated. The results show under such conditions as 4°C temperature, 0.15g catalyst, and 1.2:1 molar ratio of the hydrogen peroxide to the glyoxal, the phosphorus-molybdenum-tungsten heteropoly acid catalyst has higher catalytic activity and the mass fraction of the glyoxylic acid is 30%.

Problems of ensuring metrological traceability of measurement results of indicators of quality for food products and food raw materials

2020 ◽  
pp. 64-70
Author(s):  
Mariya Y. Medvedevskikh ◽  
Anna S. Sergeeva
Keyword(s):  
Reference Materials ◽  
Mass Fraction ◽  
Nutritional Value ◽  
Animal Feed ◽  
Raw Materials ◽  
Meat Products ◽  
Metrological Traceability ◽  
Food Products ◽  
Freeze Dried ◽  
Measurement Results

The article raises the problem of ensuring metrological traceability of the measurement results of indicators of quality and nutritional value for food products and food raw materials: water (moisture), nitrogen (protein, crude protein), fat, ash and carbohydrates. The problem under consideration can be solved by applying reference materials of food composition, traceable to state primary measurement standards GET 173-2017 and GET 176-2019 and primary reference measurement procedures (PRMP), for attestation of measurement procedures and accuracy checking of measurement results. The article discusses the results of the PRMP development of mass fraction of fat, ash and carbohydrates in food products and food raw materials, as well as mass fraction of crude fat (oil content) in oil crops seeds and products based on them. The paper also presents metrological characteristics of reference materials of composition of dry dairy products, grain-milk dry porridges for nutrition of babies, grain dry porridges for nutrition of babies, egg powder, freeze-dried meat products, animal feed. The results of the work allow for building a chain of metrological traceability from GET 173-2017, GET 176-2019 and PRMP to routine measurement procedures, thereby ensuring the uniformity of measurements of nutritional value of food products.

Sol-Gel Synthesis and Characterization of Ultrafine ZrSiO4 Powder

2014 ◽  
Vol 906 ◽  
pp. 66-71
Author(s):  
Zhen Quan Li ◽  
Qiang Zhen ◽  
Ya Li Wang
Keyword(s):  
Wavelength Range ◽  
High Purity ◽  
Raw Materials ◽  
Formation Rate ◽  
Sol Gel ◽  
Molar Ratio ◽  
Sem And Tem ◽  
Homogeneous Product ◽  
Sol Gel Synthesis ◽  
Calcined Temperature

High purity ZrSiO4 powder were synthesized using Si (C2H5O)4 and ZrOCl2·8H2O as raw materials by the sol-gel method, LiCl was added as mineralizer to promote crystallization of zircon. The influences of molar ratio of Zr:Si, calcined time and calcined temperature on the synthesis of ZrSiO4 powder were investigated. XRD, SEM and TEM were used to characterize the powders. It was found that when the molar ratio of Zr:Si was 1:1.2, the calcined temperature was 1600°C and the calcined time was 4h, the high purity ZrSiO4 ultrafine powder was obtained. The ZrSiO4 formation began at 1300°C and when the gel was calcined at 1600°Cfor 4 h, the formation rate of ZrSiO4 was up to 95%. SEM and TEM studies reveal a homogeneous product with particle sizes on the order of 0.1-1μm. The IR emissivity of ultrafine ZrSiO4 is 0.892 at the whole wavelength range, and that is up to 0.951 at the wavelength range of 8-14 μm.

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