Safe transport of cyanamide

Wehrstedt, Klaus‐Dieter; Wildner, Werner; Güthner, Thomas; Holzrichter, Klaus; Mertschenk, Bernd; Ulrich, A

doi:10.1016/j.jhazmat.2009.05.043

Cited by 24 publications

(16 citation statements)

References 4 publications

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“…Prior to the investigations, the sample of the cyanamide was heated over several hours at the temperature of 303 K. During our experiments the oven temperature was hold at constant temperature of 308 K. At this sample temperature the pressure in the main vacuum chamber of the mass spectrometer was about 10 -6 mbar to ensure collision-free conditions. The sample temperature was below the melting temperature of cyanamide of 319 K 23 and significantly below its decomposition temperature of 493 K. 27 Nevertheless, before the electron capture measurements, the composition of the molecular beam of NH 2 CN was checked for possible traces of its thermal decomposition. For that purpose the positive ion mass spectrum measured by electron ionization at the electron energy of 80 eV was recorded at different temperatures of the sample.…”

Section: Methodsmentioning

confidence: 99%

Low energy electron attachment to cyanamide (NH2CN)

Tanzer

Pełc

Huber

et al. 2015

The Journal of Chemical Physics

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Cyanamide (NH2CN) is a molecule relevant for interstellar chemistry and the chemical evolution of life. In the present investigation, dissociative electron attachment to NH2CN has been studied in a crossed electron–molecular beams experiment in the electron energy range from about 0 eV to 14 eV. The following anionic species were detected: NHCN−, NCN−, CN−, NH2−, NH−, and CH2−. The anion formation proceeds within two broad electron energy regions, one between about 0.5 and 4.5 eV and a second between 4.5 and 12 eV. A discussion of possible reaction channels for all measured negative ions is provided. The experimental results are compared with calculations of the thermochemical thresholds of the anions observed. For the dehydrogenated parent anion, we explain the deviation between the experimental appearance energy of the anion with the calculated corresponding reaction threshold by electron attachment to the isomeric form of NH2CN—carbodiimide.

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Section: Methodsmentioning

confidence: 99%

Low energy electron attachment to cyanamide (NH2CN)

Tanzer

Pełc

Huber

et al. 2015

The Journal of Chemical Physics

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“…By contrast, adopting cyanamide as a precursor and colloid nanosized silica particles as endotemplates, Antonietti and co‐workers1a prepared a series of 12 nm‐sized mesoporous CN materials with high N content (C/N=0.71:1, close to the theoretical molar ratio of C 3 N 4 ). However, the cyanamide precursor is highly explosive and toxic,5a, 11 thereby restricting the larger‐scale production of mesoporous CN materials.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Environmentally Benign Dicyandiamide as a Precursor for the Synthesis of Ordered Mesoporous Carbon Nitride and its Application in Base‐Catalyzed Reactions

Chen

Jiang

et al. 2014

Chemistry An Asian Journal

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Assisted by a new dissolution procedure, dicyandiamide (DCDA), an environmentally benign and cheap precursor, has been employed for the synthesis of mesoporous carbon nitride (CN) materials through a nanocasting approach. The synthesized mesoporous materials possessed high specific surface areas (269-715 m(2) g(-1)) with narrow pore-size distributions (about 5 nm) and faithfully replicated the mesostructures of the SBA-15 and FDU-12 templates. Several characterization techniques, including XRD, SAXS, TEM, Raman and FTIR spectroscopy, XPS, and CO2-TPD, were used to analyze the physicochemical properties of these materials and the results showed that the mesoporous CND materials had graphitic-like structures and consisted of CN heterocycles, as well as amino groups. In a series of Knoevenagel condensation reactions, as exemplified by the reaction of various aldehydes and nitriles, these mesoporous CND materials demonstrated high and stable catalytic activities, owing to an abundance of basic sites.

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“…] was first obtained by Bineau 1 from cyanogen chloride and ammonia in 1838. It is a very important organic chemical intermediate in the production of fertilizers, plant protection agents, pharmaceuticals, biocides, dyestuffs and a number of other valuable fine chemicals 2,3 .…”

Section: N N H Hmentioning

confidence: 99%

Conversion of Urea to Cyanamide Over Phosphorus-Modified H-ZSM-5

Lu¹,

Wang²,

Zhang³

et al. 2014

Asian J. Chem.

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A novel high active catalyst for the decomposition of urea into cyanamide was developed by treating H-ZSM-5 zeolite with phosphoric acid solution. The catalytic activity of the phosphorous modified H-ZSM-5 was tested in a continuous flow fixed bed reactor at 823 K and atmospheric pressure. The acidity of catalysts, especially Brønsted acid sites, is decreased by phosphorous modification. The selectivity for cyanamide of the catalysts is enhanced by the addition of phosphorus component. These results indicate that the Brønsted acid sites strength is a crucial factor for the selective production of cyanamide.

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Safe transport of cyanamide

Cited by 24 publications

References 4 publications

Low energy electron attachment to cyanamide (NH2CN)

Low energy electron attachment to cyanamide (NH2CN)

Utilization of Environmentally Benign Dicyandiamide as a Precursor for the Synthesis of Ordered Mesoporous Carbon Nitride and its Application in Base‐Catalyzed Reactions

Conversion of Urea to Cyanamide Over Phosphorus-Modified H-ZSM-5

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