Columns ethanolamine solutions

A packed column is used to absorb S02 from flue gas using an ethanolamine solution. The column is 4 ft in diameter, has a packed height of 20 ft, and is... 

The reaction scheme (14.3.4.B-a)-(14.3.4.B-b) corresponds to that dealt with above in the general description of the design and simulation of plate columns. An estimate of the Ha number classifies them as very fast, but not instantaneous. In such a case the reactions take place entirely in the film, so that Xco2.fo written Xaji in what follows, is set zero in (14.3.4.A-Q and (14.3.4.A-g). The viscosity of the solution and the diffusivity of CO2 in the solution were calculated on the basis of experimental data of Thomas and Furzer [1962] and Shridar and Potter [1977]. Densities of ethanolamine solution were measured by Tseng and Thompson [1964] and Riddick and Bunger [1970]. 

A) 1-(2-Amino-5-chlorophenyll-1-(2-fluorophenyll-2-a2a-but-1-en-4-ol A mixture of 40 g of 2-methylimidazole hydrochloride and of 90 g of 2-amino-5-chloro-2 -fluoro-benzophenone in 240 ml of ethanolamine is heated at 135 for 2 hours. After cooling, the reaction mixture is poured into an aqueous sodium bicarbonate solution. The mixture is extracted with ether, the organic phase is washed repeatedly with water and is dried over sodium sulfate, and the solvent is evaporated to dryness. The residual oil is chromatographed on a silica column, elution being carried out with a 50/50 mixture of cyclohexane and ethyl acetate. 

A solution of 100 p,g IgG in 500 (jlI 0.2 M NaHCO3/0.5 M NaCl (pH 8) was added to n-hydroxysuccinimidyl (NHS)-activated 6-aminohexanoic acid-coupled sepharose (Sigma, St Louis, USA), and allowed to bind for 60 min at 20 C before transferring onto a microcapillary (MoBiTec, Gottingen, Germany). Columns were washed alternately with blocking (ethanolamine/NaCl) and washing buffer (NaAc/NaCl). 

Fig. 5-27. Separation of ethanolamines. — Separator column IonPac NS1 (10pm) eluent 0.004 mol/L hexanesulfonic acid + 0.04 mol/L H3B03 flow rate 1 mL/min detection suppressed conductivity injection volume 100 pL solute concentrations ammonium (1), 2.5 ppm monoethanol-amine (2), 5 ppm diethanolamine (3), and 10 ppm triethanolamine (4).

Ethanolamine is another alkylamine that reacts with reducing sugars to give fluorescent products. An aqueous solution containing boric acid and ethanolamine (both 2%, m/v) is used as the reagent and is mixed 1 3 (v/v) with the column effluent, at a temperature of 150°C, with fluorimetric detection of the products (excitation wavelength 357 nm,... 

Fig. 4-33. Separation of ethanolamines on PBDMA-coated silica. — Separator column LiChrosil 1C CA column temperature 40°C eluant 5 mmol/L tartaric acid + 1 mmol/L pyridine-2,6-dicarboxylic acid flow rate 1 mL/min detection direct conductivity injection volume 15 pL solute concentrations 30 mg/L monoethanolamine (1), 50 mg/L diethanolamine (2), and 100 mg/L triethanolamine (3).

The properties of fatty aldehydes have been reviewed [303,576]. In the native form, they can be analysed by GC on similar columns to those used for fatty acid analysis, and they can be identified and estimated by analogous procedures. Standard aldehyde mixtures are available from commercial sources, or they can be prepared from the corresponding fatty acids by a number of simple methods. Aldehydes have been reported to be stable for long periods, if stored at -20°C in solution in carbon disulfide or other inert solvents such as pentane or diethyl ether [990], but they should not be kept in contact with other lipids, especially those containing ethanolamine, which catalyses a condensation reaction in which 2,3-dialkylacroleins are formed [805]. 

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