Analysis and modeling of adiabatic reactor for monoethanolamine selective production

Tsuneki, Hideaki; Moriya, Atsushi

doi:10.1016/j.cej.2008.12.031

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…Selective ring openings of oxiranes I (epoxides) represent the first step of polymerizations but can also yield important molecular building blocks such as ethylene glycol , or β-functional alcohols and, hence, are of paramount industrial importance. By comparison, ring-opening reactions of oxaphosphirane complexes II (Scheme ) have not been widely explored, although they largely mimic the chemistry of oxiranes and have become readily available via the effective, yet facile synthetic protocol using Li/Cl phosphinidenoid complexes. − Only a few examples of ring-opening reactions have been reported using strong Brønsted acids such as HOTf or superacids such as protonated toluene, leading to selective C–O bond cleavage and side-on P -OH alkylidene phosphonium complexes.…”

Section: Introductionmentioning

confidence: 99%

Epoxide-like Chemistry: 1,2-Bifunctional P-Ligands via Stereo- and Regioselective Ring Opening of an Oxaphosphirane Complex

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Epoxide-like Chemistry: 1,2-Bifunctional P-Ligands via Stereo- and Regioselective Ring Opening of an Oxaphosphirane Complex

et al. 2018

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“…When ammonia vaporization is suppressed by high reaction pressure, the catalyst bed temperature will increase with generated reaction heat, proportional to EO conversion. On the other hand, if the pressure in the reactor is kept at 10 MPa, vaporization of ammonia begins when the temperature reaches the boiling point of the reaction mixture, and temperature increases very slowly [32].…”

Section: Adiabatic Reactor With Partially Vaporized Ammoniamentioning

confidence: 99%

Development of Diethanolamine Selective Production Process Using Shape-Selective Zeolite Catalyst

Tsuneki

2010

Catal Surv Asia

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Ethanolamines are conventionally produced on an industrial scale exclusively by the reaction of ethylene oxide (EO) with an aqueous solution of ammonia. The reaction is a typical consecutive reaction with three steps [NH 3 ? NH 2 (CH 2 OH) ? NH(CH 2 OH) 2 ? N(CH 2 OH) 3 ]; therefore, it is difficult to produce diethanolamine with high selectivity. We developed a catalytic process for selective diethanolamine production from EO and anhydrous ammonia using a ZSM-5 zeolite catalyst modified with rare earth elements. This highly active catalyst was able to recognize the difference at molecular level between diethanolamine and triethanolamine. We also succeeded in producing a binderless molded zeolite catalyst having a shape suitable for a fixed-bed reactor. This catalyst does not give problematic impurities due to undesirable reactions over binders. The catalyst deterioration was overcome by developing a regeneration process using high temperature and highdensity ammonia gas as a rinse medium.

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“…At chemical plants, ethanolamines are produced by oxyethylation of ammonia using water as a catalyst [1][2][3]. The product stream produced from the reactor block consists of MEA (monoethanolamine), DEA (diethanolamine), and TEA (triethanolamine), which are separated into components in the rectification columns [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Coupled Simulation of a Vacuum Creation System and a Rectification Column Block

2020

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The purpose of this study was the coupling simulation of the vacuum block of the ethanolamine mixture separation unit to determine the optimal layout of the vacuum creation system. For this, a computational model of the vacuum unit, which was identified by comparing the computational data with the data of an industrial study of vacuum rectification columns, was synthesized in the Unisim Design R461 software package. To determine the required load on the vacuum system, a numerical experiment was carried out, during which it was discovered that the load on the system would be 9600 m3/h. It was proposed to replace individual column vacuum pumps with a single vacuum-generating system (VGS) based on a liquid ring vacuum pump (LRVP). When defining the layout, two possible schemes were considered, the models of which were created in Unisim Design R461. The system layout was determined by matching the characteristics of the system elements with the characteristics of the vacuum columns. A technical and economic comparison of the proposed solutions was carried out and the payback period for capital costs was calculated, which for Scheme 1 was 4.14 years, and for Scheme 2–3.59 years.

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Analysis and modeling of adiabatic reactor for monoethanolamine selective production

Cited by 8 publications

References 2 publications

Epoxide-like Chemistry: 1,2-Bifunctional P-Ligands via Stereo- and Regioselective Ring Opening of an Oxaphosphirane Complex

Epoxide-like Chemistry: 1,2-Bifunctional P-Ligands via Stereo- and Regioselective Ring Opening of an Oxaphosphirane Complex

Development of Diethanolamine Selective Production Process Using Shape-Selective Zeolite Catalyst

Coupled Simulation of a Vacuum Creation System and a Rectification Column Block

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