Ethylene Oxide → Triethanolamine

Temperature

150 °C

The reaction was carried out by use of the apparatus shown in FIG. 5. A stainless steel tube having an inner diameter of 15 mm, a length of 400 mm, a heater wound thereon for compensating the heat radiation, and a heat-insulation was used as a reactor 501. Within the reactor 501, a protection tube where a thermocouple could be inserted to measure the temperature profile of a fixed catalytic layer, was installed. Into the reactor 501 was packed 50 cm3 of catalyst A, and the raw material (the molar ratio of ammonia/ethylene oxide: 8/1) heated to 60° C. through a pre-heater 502 was fed at 5 hr−1 (LHSV), to carry out the reaction. The reaction pressure was 10 MPa, and the reaction was in a gas-liquid mixing phase. Though the temperature increased up to 150° C. by the heat of reaction over the length of about 100 mm from the inlet at the initial stage, the temperature came to have a profile barely rising to nearly 150° C. after 200 hrs near the outlet of the catalytic layer. As a result, a reduction in catalytic activity was observed. The results obtained are as follows: the conversion of ethylene oxide was 100%; and the ratio of each component in the produced ethanolamines was: monoethanolamine/diethanolamine/triethanolamine=51/46/3. Diethanolamine was produced at a high selectivity while a small amount of triethanolamine was produced.

1. customA stainless steel tube having
2. customa heat-insulation was used as a reactor
3. customthe reaction
4. customThe reaction pressure
5. additionmixing phase
6. temperatureheat of reaction over the length of about 100 mm from the inlet at the initial stage
7. waitbarely rising to nearly 150° C. after 200 hrs near the outlet of the catalytic layer
8. customThe results obtained

ORD record

ord-fba3b2a4933e4f01950ea81e631c8130

Source dataset

uspto-grants-2003_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06559342B1