Diisopropanolamine

Concentrated monoethan olamine and monoisopropan olamine can cause severe local irritation or even bums to the mouth, throat, and digestive tract. If monoethan olamine and monoisopropan olamine are swallowed, large volumes of milk or water should be administered immediately. If diethanolamine, triethanolamine, diisopropanolamine, or triisopropanolamine are swallowed, vomiting should be induced after drinking two glasses of water. 

Diethanolamine, diisopropanolamine, and isopropan olamine mixtures are less irritating to the skin than MEA and MIPA however, any one of them may produce severe skin irritation, even mild bums, if contact is prolonged or frequently repeated. Occasional short contact should not result in more than slight irritation. Undiluted triethanolamine and triisopropan olamine are slightly to moderately irritating to the skin. A bum may result from prolonged and repeated contact. Short occasional contact and solutions of less than 10% concentration are unlikely to cause more than very slight irritation, if any. 

Diisopropanolamine Systems. Diisopropanolamine (DIPA) is a secondary amine used in the Shell ADIP process to sweeten natural gas. DIPA systems are similar to MEA systems but offer the following ad an-tages carbonyl sulfide (COS) can be removed and regenerated easily and the system is generally noncorrosive and requires less heat input. 

Licensed by Shell the Sulfinol process combines the properties of a physical and a chemical solvent. The Sulfinol solution consists of a mixture of sulfolane (tetrahydrothiophene 1-1 dioxide), which is a physical solvent, diisopropanolamine (DIPA), and water. DIPA is a chemical solvent that was discussed under the amines. 

A range of amines and alcohols has been selected for calculating 8 and Tg of fully capped EPM-g-MA as a function of the MA graft content. Examples of these amines and alcohols included ammonia, 2-aminoethanol, 2-(methylamino)ethanol, diethanolamine, diisopropanolamine, urea, glycine, 1,4-dia-minobutane, and the amide acid of ammonia-capped MA. Typical results are presented in Figure 13.7. 

The results in Table 13.2 indicate that the degree of swell decreases in the order of products capped with ammonia, 2-aminoethanol, diisopropanolamine, and diethanolamine, which is in line... 

Sulfinol-X Shell Global Solutions Diisopropanolamine/MDEA + sulfolane + accelerator... 

Absorbents based on a variety of amines are by far the most common. Amines that have been used include monoethanolamine (MEA), diethanolamine (DEA), triethanolamine (TEA), diisopropanolamine (DIPA), methyl diethanolamine (MDEA), and digly-colamine (DGA). C02 is typically absorbed at 80-140°F temperature and up to 1000 psig pressure by chemically reacting with the basic amine functional group in the absorbent, for example, primary amine, MEA, reacts with C02 by the following reaction forming a carbamate salt ... 

V,lV-Diisopropylethylamine, 2 549t Diisopropanolamine (DIPA) physical properties of, 2 1231 specifications, 2 132t... 

Commercially available hyperbranched polymer, a poly(ester-amide) is currently being marketed by DSM under the product name Hybrane [13] (Figure 8.2). It is also a hydroxyl-functionalized product, but contains both amide and ester linkages. The synthesis is accomplished in two steps cyclic anhydrides are reacted with diisopropanolamine to give an amide-intermediate, possessing two hydroxyl groups and one carboxylic acid. The subsequent polymerization takes places via an oxazolinium intermediate which results in the formation of a... 

Figure 8.2 A schematic representation of hydroxy-functional hyperbranched poly(ester-amide) Hybrane based on diisopropanolamine and an anhydride [11]...

Application to Alkanolamine Solutions Aqueous alkanolamine solutions are widely used for the removal of H2S and C02 from gaseous streams, because they can reduce the concentration of H2S and C02 to low levels, even if the gas stream is at a low total pressure. The most commonly used alkanolamines are monethanolamine (MEA) and diethanolamine. However, diisopropanolamine... 

In the SCOT process, the sulfur compounds in the Claus tail gas are converted to hydrogen sulfide by heating and passing it through a cobalt-molybdenum catalyst with the addition of a reducing gas. The gas is then cooled and contacted with a solution of diisopropanolamine (DIPA) that removes all but trace amounts of hydrogen sulfide. The sulfide-rich diisopropanolamine is sent to a stripper, where hydrogen sulfide gas is removed and sent to the Claus plant. The diisopropanolamine is returned to the absorption column. 

DIISOPROPYLAMINE DI-n-PROPYLAMINE n-HEXYLAMINE TRIETHYLAMINE 6-AMINOHEXANOL DIISOPROPANOLAMINE TRIETHANOLAMINE N-AMINOETHYL PIPERAZINE TRIETHYL PHOSPHATE HEXAMETHYLENEDIAMINE HEXAMETHYL PHOSPHORAHIDE TRIETHYLENE TETRAMINE HEXAMETHYLDISILOXANE... 

DIPA See diisopropanolamine. dip-o or de T pe a dipentene org chem A racemate of limonene. dT pen,ten dipentene glycol See terpin hydrate. dT pen.ten glT,k6l dipentene hydrochloride See terpene hydrochloride. dT pen,ten,hT-dr3 kl6r,Td ) diphacinone orgchem C23H16O3 A yellow powder with a melting point of 145-147°C used to control rats, mice, and other rodents acts as an anticoagulant. do fas-3,non ... 

In the first step of the synthesis of the hyperbranched polyesteramides, a cyclic carboxylic anhydride is reacted with diisopropanolamine, ideally forming a... 

Fig. 2. Reaction of cyclic carboxylic anhydride with diisopropanolamine...

Fig. 8). Signals from molecules with ratios of anhydride (A)/diisopropanol-amine (D) of n n and n (n-b 1) were predominantly observed. Other signals, for example composed of n (n+2), n (n+3), etc., indicative of the reaction proceeding via pathway C in Fig. 6 (observed abundantly in resins made of diethanolamine) appeared only in minor amounts. The signals with n n ratios of an-hydride/diisopropanolamine, also present in minor amounts (usually between 5% and 20%) compared to the n (n-i-1), can be ascribed to cycle formation [14]. The relative abundance of these perspective peak series varied considerably with the monomer ratios, i. e., molecular weights and the type of cyclic anhy-... 

Fig. 8. Part of an ESI mass spectrum of hyperbranched polyesteramides based on HHPA and diisopropanolamine A = DIPA, D = HHPA...

The key to a controlled molecular weight build-up, which leads to the control of product properties such as glass transition temperature and melt viscosity, is the use of a molar excess of diisopropanolamine as a chain stopper. Thus, as a first step in the synthesis process, the cyclic anhydride is dosed slowly to an excess of amine to accommodate the exothermic reaction and prevent unwanted side reactions such as double acylation of diisopropanolamine. HPLC analysis has shown that the reaction mixture after the exothermic reaction is quite complex. Although the main component is the expected acid-diol, unreacted amine and amine salts are still present and small oligomers already formed. In the absence of any catalyst, a further increase of reaction temperature to 140-180°C leads to a rapid polycondensation. The expected amount of water is distilled (under vacuum, if required) from the hot polymer melt in approximately 2-6 h depending on the anhydride used. At the end of the synthesis the concentration of carboxylic acid groups value reaches the desired low level. 

---