25215-75-2Relevant articles and documents
Method for synthesizing hydrazine hydrate or carbodiimide at one step by using ammonia air oxidizing method
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Paragraph 0039; 0040; 0041, (2017/08/31)
The invention relates to a method for synthesizing hydrazine hydrate or carbodiimide at one step by using an ammonia air oxidizing method, and belongs to the technical field of chemical engineering processes. The method is characterized in that only ammonia and air are used as raw materials, and flow through a reactor which is filled with a solid catalyst, and gas and solid catalyzing reaction is performed, so as to synthesize the high-concentration hydrazine hydrate at one step; when methanol or formaldehyde is added into the raw materials, the carbodiimide is synthesized at one step. The method has the advantages that by fundamentally reforming the production of the two products, the production cost is greatly reduced, the production and environment-protection conditions are improved, and the product quality is improved.
Production of nanocatalyst from natural magnetite by glow discharge plasma for enhanced catalytic ozonation of an oxazine dye in aqueous solution
Taseidifar, Mojtaba,Khataee, Alireza,Vahid, Behrouz,Khorram, Sirous,Joo, Sang Woo
, p. 218 - 226 (2015/05/20)
Cheap natural magnetite (NM) was modified with oxygen plasma owing to its cleaning effect by chemical etching and with argon plasma due to its sputtering effect resulting in more surface roughness. These plasmas were utilized individually or in the order of first O2 and then Ar plasmas, respectively. The performance of the plasma treated magnetites (PTMs) was higher than NM for treatment of Basic Blue 3 (BB3) in catalytic ozonation (O3/PTM). The properties of NM and the most efficient treated magnetite (PTM4) samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer-Emmett-Teller (BET) and scanning electron microscopy (SEM) methods. The optimal values were chosen for operational parameters including ozone concentration (0.3 g/L), initial pH (6.7) and PTM4 dosage (600 mg/L). GC-Mass analysis was applied to detect intermediates. Environmentally-friendly treatment of the NM, simple separation of the catalyst, negligible leached iron concentration, successive reusability at milder pH and unaffected efficiency in the presence of inorganic salts are the main advantages of the PTM4.
Synthesis and degradation of nucleic acid components by formamide and iron sulfur minerals
Saladino, Raffaele,Neri, Veronica,Crestini, Claudia,Costanzo, Giovanna,Graciotti, Michele,Di Mauro, Ernesto
experimental part, p. 15512 - 15518 (2009/03/12)
We describe the one-pot synthesis of a large panel of nucleic bases and related compounds from formamide in the presence of iron sulfur and iron-copper sulfur minerals as catalysts. The major products observed are purine, 1H-pyrimidinone, isocytosine, adenine, 2-aminopurine, carbodiimide, urea, and oxalic acid. Isocytosine and 2-aminopurine may recognize natural nucleobases by Watson-Crick and reverse Watson-Crick interactions, thus suggesting novel scenarios for the origin of primordial nucleic acids. Since the major problem in the origin of informational polymers is the instability of their precursors, we also investigate the effects of iron sulfur and iron-copper sulfur minerals on the stability of ribooligonucleotides in formamide and in water. All of the iron sulfur and iron-copper sulfur minerals stimulated degradation of RNA. The relevance of these findings with respect to the origin of informational polymers is discussed.
