Catalytic Behavior of Alkali Treated H-MOR in Selective Synthesis of Ethylenediamine via Condensation Amination of Monoethanolamine

Round 1

Reviewer 1 Report

The manuscript titeled "Catalytic behavior of alkali treated H-MOR in  selective synthesis of ethylenediamine via  condensation amination of monoethanolamine" written by Fengwei Zhao, Qian Zhang, Feng Hui, Jun Yuan, Suning Mei, Qinwei Yu, Jianming Yang, Wei Mao, Zhongwen Liu, Zhaotie Liu and Jian Lu is very interesting scientific paper. Ethylenediamine is important composition, substrate for the preparation of chelating reagents, surfactants, fabric softeners, lubricating oil additives, fungicides, insecticides and resinous polymers. The authors proposed the new method of EDA obtaining during the condensation amination of MEA with ammonia at a lower pressure (0.1-4.0 MPa) over solid acidic zeolites catalysts. The samples were very well charcaterized. The authors considers the impact of H-MOR modiffied by NaOH additive on structural and acidic properties of this material and then the effect of the these structural and acidic properties on the activity of H-MOR catalysts.

I propose to accept this paper for the publication, but I have one question:

Do the authors posses any knewledge about the activity of HZSM-5 modiffied by NaOH additive in described reaction? Does the NaOH additive is the only one the key factor in the improvment of activity and the yield of zeolites catalysts in the condensation of MEA with ammonia?

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

The authors reported the catalytic investigation of mesoporous H-MOR as a efficient catalyst for synthesis of ethylenediamine via condensation amination of monoethanolamine. For this investigation, the mesoporous H-MOR catalysts were prepared by desilication method using different concentration of NaOH solutions. The desilicated H-MOR catalyst exhibited high catalytic activity and product selectivity in the target reaction due to improved mesoporosity and acidity. Considering the interest in the catalytic investigation of H-MOR-based catalysts for the condensation amination reaction, publication in Catalysts is recommended after minor revision.

1. The authors should check the product selectivity data in Table 3. (Sum of product selectivity must be 100 %) If not, the authors should add the selectivity to other by-products in the catalytic reaction.
2. The authors should add the Solid-state 27Al NMR data to better show the stability and acidity of the treated zeolite samples.
3. The authors should comment on the measurement detail about FT-IR analysis using pyridine (e.g., extinction coefficient) in the experimental section.

 

Author Response

Please see the attachment.

Author Response File: Author Response.pdf