Synthesis Technology of Amine Surfactant Modified Brewer's Grains for the Adsorption of Cr(VI)
0
Citation
2
Reference
10
Related Paper
Abstract:
The modified adsorbent was modified by amine reaction with brewer's grains that using epichlorohydrin as etherfying agent,N,N-Dimethyl formamide as dissolvent, triethylenete tramine as cross-linking agent.The simulation of Cr (VI) wastewater as treatment object, through the optimization of synthesis conditions of Cr (VI), the optimal synthesis process was obtained.The results showed, 4 g brewer's grains, add 15 ml epichlorohydrin and 15 ml N,N-Dimethyl formamide stirring 1h at 85 °C. Then added dropwise to 4mL triethylenete tramine, mixing reaction 1h at 85 °C. The maximal absorption rate got 99.81%.The modified brewer's grains of amine surfactant modified is a promising treatment of chromium wastewater biological materials.Keywords:
Epichlorohydrin
Dimethyl formamide
Dimethylamine
Objective:To establish method for determination of residual formamide in Allopurinol by gas chromato-graphy.Methods:Detected by FID detector,Separated by SUPLCOWAX-10.Results:The formamide show a good linear relationship at range of 5～20μg/ml,the average recovery was 95.57%.(RSD=1.74%,n=6)for formamide.Conclusion:It is quite suitable to be used in analysis of the formamide in Allopurinol.
Allopurinol
Dimethyl formamide
Linear range
Cite
Citations (0)
Wheat straw was modified into anion exchanger for the removal of nitrate by using epichlorohydrin as etherifying agent and dimethylamine as aminating agent.Catalysis time is the main factor that affects the efficiency of modification,while activation time,reaction time,and the amounts of wheat straw,catalyzer,and dimethylamine are the minor factors.The best reaction parameters are wheat straw 2 g,epichlorohydrin 20 mL,dimethylformamide 25 mL,catalyzer 15 mL,dimethylamine 30 mL,activation time 1 h,catalysis time 1 h and reaction time 3 h.The nitrate removal rate was 78.13% if the product was prepared under this condition.
Dimethylamine
Epichlorohydrin
Cite
Citations (0)
Dimethylamine,epichlorohydrin,and ethylenediamine were used as inter-layer reagents to prepare epicholorohydrin-dimethylamine cationic polymer/bentonite (EPI-DMA/Bt) with the monomer-insert inter-layer polymerization method.The influence of the amounts of dimethylamine,epichlorohydrin,and ethylenediamine,reaction temperature and reaction time on the performance of EPI-DMA/Bt were investigated. This composite structure was characterized with XRD and specific surface area measurement.The results showed that when the amount of dimethylamine was 3 mmol·g-1,n(epichlorohydrin/dimethylamine)=1∶1 and m[ethylenediamine/(epichlorohydrin + dimethylamine)]=2%,reacting at 65℃ for 3 h,the adsorption efficiency of active jade blue (K-GL) on the EPI-DMA/Bt product was above 90%.
Dimethylamine
Epichlorohydrin
Cationic polymerization
Ethylene diamine
Cite
Citations (0)
Abstract The molecular ion‐minus‐ammonia [M – NHJ] fragmentation of (3‐phenylpropyl) primary amines is a major contributor to the total ion current. This fragmentation occurs to a lesser extent in the lower and higher homologs, (2‐phenethy1)‐ and (4‐phenylbuty1)amine. The loss of methylamine and dimethylamine from N‐methyl‐(3‐phenylpropyl)amine and N,N‐dimethyl‐(3‐phenylpropy1)amine respectively is essentially absent. Deuterium labeling has shown that C‐3 is the primary source of hydrogen abstracted in the [M NHJ] fragmentation of (3‐pheny1propyl)amine.
Dimethylamine
Fragmentation
Primary (astronomy)
Liquid ammonia
Cite
Citations (9)
Abstract A method for the analysis of epichlorohydrin‐dimethylamine flocculants is presented. The method is applicable to concentrations of flocculant of between 2 and 60 parts per million. These concentrations are used in coal and other mineral processing operations. An extension of the method may be used to give semiquantitative estimations of higher concentrations.
Epichlorohydrin
Dimethylamine
Cationic polymerization
Cite
Citations (2)
Abstract The reaction between dimethylamine and epichlorohydrin (in excess) was studied with the purpose of obtaining compounds with ammonium quaternary groups and reactive groups like 2,3-epoxypropyl and 2-hydroxy-3-chloropropyl. It was found that the ionic products of this reaction are mixtures of oligomers described by the following chemical formula: where, depending of the reaction conditions, the parameters n and x take values in the ranges 0–1.5 and 0–0.75, respectively. It is shown how these structure parameters are affected by the ratio of reactants, the solvent, the temperature, and the time of reaction.
Epichlorohydrin
Dimethylamine
Cationic polymerization
Reaction conditions
Cite
Citations (2)
Low frequency Raman spectra (20–400 cm−1) are presented of formamide dissolved in dimethylsulfoxide (DMSO). The concentration of formamide ranges from 2%–75% (v/v). The two formamide bands at 110 and 190 cm−1 in the neat liquid exhibit only smaller frequency shifts upon dilution. The intensities of both bands are proportional to the concentration of formamide. The conclusion is, that the linear chain structure, found in neat liquid formamide, is conserved in the DMSO solution. Raman spectra of the NH-stretching region (2950–3500 cm−1) confirm this hypothesis.
Dimethyl formamide
Dilution
Liquid state
Cite
Citations (16)
Dimethyl formamide
Cite
Citations (0)
Journal of the Chemical Society Faraday Transactions 1 Physical Chemistry in Condensed Phases (1982)
Measurements have been made of the magneto-optical rotations at 435.8 nm of binary liquid mixtures of water with dimethylsulphoxide, formamide, methyl formamide, dimethyl formamide and acetonitrile as part of a study to investigate the applicability of the magneto-optical method in detecting weak molecular interactions in liquid mixtures. The departure from ideality of the mixtures was treated in terms of an excess magnetic rotation, αE. For mixtures of water with dimethylsulphoxide, formamide, methyl formamide and dimethyl formamide the values of αE indicated interaction between the components, whereas with acetonitrile the αE values were compatible with a breakdown of the water structure in the mixtures.
Dimethyl formamide
Optical Rotation
Cite
Citations (11)
Flocculants epichlorohydrin-dimethylamine polymers (EPI-DMA) were synthesized by polycondensation of dimethylamine and epichlorohydrin with modifying agents including 1,2-Diaminoethane,diethylenetriamine and triethylenetetramine. The influences of the amount of modifying agents on the characteristics of EPI-DMA were investigated. IR and TEM were used to test the structure of EPI-DMA. EPI-DMA flocculants were also used for decoloring wastewater. The results showed that the addition of modifying agents changed the viscosity and the cationic degree of EPI-DMA. The IR spectrums of EPI-DMA were analogical, but the morphologies of the flocculants were different. When treating activated red dye wastewater, EPI-DMA flocculants showed both charge neutralization and adsorption bridging functions,while for reductive red dye wastewater EPI-DMA performed mainly as charge neutralization; The experimental results for treating raw wastewater showed that the decolorization rate and COD_ Cr removal rate could reach 80% and 60% respectively.
Epichlorohydrin
Dimethylamine
Triethylenetetramine
Cationic polymerization
Diethylenetriamine
Triethanolamine
Cite
Citations (7)