DLA A-A-59231 B-2012 ETHANOLAMINES (MONOETHANOLAMINE AND TRIETHANOLAMINE) TECHNICAL.pdf
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1、 Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data that may improve this document should be sent to DLA Aviation, VEB, 8000 Jefferson Davis Highway, Richmond, VA 23297-5616 or e-mailed to STDZNMGTdla.mil. Since contact information can change, you may want
2、to verify the currency of this address information using the ASSIST database at https:/assist.dla.mil. AMSC N/A FSC 6810 METRIC A-A-59231B 9 July 2012 SUPERSEDING A-A-59231A 17 January 2007 COMMERCIAL ITEM DESCRIPTION ETHANOLAMINES (MONOETHANOLAMINE AND TRIETHANOLAMINE), TECHNICAL The General Servic
3、es Administration has authorized the use of this commercial item description for all federal agencies. 1. SCOPE. This commercial item description (CID) covers technical grades of modified commercial monoethanolamine and triethanolamine. Monoethanolamine is intended for use as a decontaminant for rio
4、t control agent CS (ortho-chlorobenzylidene malononitrile) and for the chemical agent CS1 dispersing equipment. Monoethanolamine is also intended for the removal of carbon dioxide from air, other gases, and liquids by absorption. Triethanolamine is intended for use when an organic base is required,
5、as in maintaining alkalinity of water solutions to prevent corrosion in such equipment as boilers, pipes, and radiators. 2. CLASSIFICATION. The ethanolamines shall be of the following types as specified (see 7.3(b): 2.1 Type. Type I - Monoethanolamine (MEA) Type II - Triethanolamine (TEA) 3. SALIENT
6、 CHARACTERISTICS 3.1 Appearance. Ethanolamines shall be clear, viscous, and free of suspended matter in the liquid state when tested as specified in 3.3.1. When in solid form, ethanolamines shall have a white, crystalline appearance, without visual evidence of impurities or discoloration. 3.2 Chemic
7、al and physical characteristics. Ethanolamines shall conform to the chemical and physical characteristics of table I when tested as specified herein. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59231B 2 TABLE I. Chemical and physical characte
8、ristics. Characteristics MEA TEA Test paragraph Specific gravity at 20 C/20 C (percent min.) 1.017 to 1.021 1.124 to 1.129 3.3.2 Percent by volume distilled between 165 C and 175 C 90 minimum - ASTM D86 Color (Platinum-Cobalt scale) 15 maximum 40 maximum ASTM D1209 Water content (percent by weight)
9、0.30 maximum 0.20 maximum ASTM E203 MEA content (percent by weight) 99.0 minimum 0.50 maximum 3.3.3 TEA content (percent by weight) 0.20 maximum 99.0 minimum 3.3.3 Diethanolamine (DEA) content (percent by weight) 0.50 maximum 0.50 maximum 3.3.3 3.3 Tests. See 7.5 for sampling and testing precautions
10、. Water, in accordance with any ASTM D1193, “Standard Specification for Reagent Water“ type and grade, and reagent grade chemicals shall be used throughout the tests. Where applicable, blank determinations shall be run and corrections applied where significant. Tests shall be conducted as follows: 3
11、.3.1 Appearance. Thoroughly mix the specimen and transfer 25 milliliters (mL) into a 50 mL test tube. Stopper the test tube and allow it to stand until the bubbles have disappeared completely. Examine by transmitted light for uniformity and for freedom from particles and foreign matter. 3.3.2 Specif
12、ic gravity. Measure the specific gravity of types I and II ethanolamine specimens at 20 C/20 C. Determine with a digital density meter calibrated to give the apparent specific gravity at the specified conditions or a specific gravity balance (chainomatic) adjusted to give a 1.000 value for the speci
13、fic gravity of water at 20 C. Other approved methods per ASTM D891, “Standard Test Methods for Specific Gravity, Apparent, of Liquid Industrial Chemicals“, may be used. 3.3.3 MEA, TEA and DEA content. 3.3.3.1 Apparatus. Use a gas chromatographic method with temperature programmer, split injection sy
14、stem, capillary or packed column, flame ionization (FID) or thermal conductivity detector, and recorder, or other equivalent instrumentation and equipment for MEA, TEA and DEA content analyses. 3.3.3.2 Chromatographic conditions. Recommended conditions for a gas chromatograph (GC) using a fused sili
15、ca capillary column and a FID are shown in table II. Other equivalent instrumentation or GC column and detector may be used, but may require modification of Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-59231B 3 conditions in order to obtain go
16、od peak shapes, adequate resolutions, and appropriate retention times. TABLE II. Chromatographic conditions. Characteristic Condition Column material 5.0 micron fused silica Column dimensions 30 m (0.32 mm ID) Column temperature 60 C to 270 C at 10 C/min.* Injector temperature 250 C Detector tempera
17、ture 280 C Carrier gas Helium Carrier gas flow rate 2.0 mL/min. * 60 C held for 3 minutes, then programmed to 270 C at 10 C/min., and held for 10 minutes. 3.3.3.3 Standard solutions. Use MEA, DEA and TEA of no less than 99.0 percent by weight purity in preparing the standard solutions. At least one
18、standard solution shall be prepared with concentrations near the required levels as shown in table I. If multiple standard solutions are used, they shall bracket the requirements shown in table I. For MEA testing, the standard solution shall be prepared to be approximately 0.50 percent DEA and 0.20
19、percent TEA with the remainder being MEA. For TEA testing, the standard solution shall be prepared to be approximately 0.50 percent DEA and 0.50 percent MEA with the remainder being TEA. The three peaks shall exit in the following order: MEA, DEA and TEA. Repeated injections of the standard solution
20、 shall be passed through the GC until the main peak areas are each reproducible to within 2 percent of the average result (for each peak). Additional trace peaks shall be present, but the area of those peaks shall not be greater than 10 percent of the area of either of the two minor peaks. This proc
21、edure gives the response factor of the GC apparatus for all three ethanolamines at the appropriate concentrations. Response factors may not be constant over a large range of concentrations and should either be determined for several concentrations or at the expected concentration of the samples to b
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