Pyridine: Difference between revisions

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*It is a colorless, highly flammable, weakly alkaline, water-soluble liquid with a distinctive, unpleasant fish-like smell. Pyridine is colorless
*It is a colorless, highly flammable, weakly alkaline, water-soluble liquid with a distinctive, unpleasant fish-like smell. Pyridine is colorless
*Older or impure samples can appear yellow.
*Older or impure samples can appear yellow.
*It is a basicc industrial chemical feedstock
*It is a basic industrial chemical feedstock


=Synthesis=
=Synthesis=
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its composition depends on the catalyst used and can be adapted to the needs of the manufacturer via changing the catalyst accoordingly
its composition depends on the catalyst used and can be adapted to the needs of the manufacturer via changing the catalyst accoordingly


=See Also=
=Internal Links=
*[[Pyridinium Chloride]]
*[[Pyridinium Chloride]]


=Useful Links=
=External Links=
*[https://en.wikipedia.org/wiki/Pyridine The Wikipedia Page on Pyridine]
*[https://en.wikipedia.org/wiki/Pyridine The Wikipedia Page on Pyridine]
[[Category: Bio-Petrochemistry]]

Latest revision as of 01:16, 19 December 2020

Basics

  • Pyridine is a basic heterocyclic organic compound with the chemical formula C5H5N
  • It is structurally related to benzene, with one methine group (=CH−) replaced by a nitrogen atom
  • It is a colorless, highly flammable, weakly alkaline, water-soluble liquid with a distinctive, unpleasant fish-like smell. Pyridine is colorless
  • Older or impure samples can appear yellow.
  • It is a basic industrial chemical feedstock

Synthesis

Chichibabin synthesis

Basics

  • This process is carried out in a gas phase at 400–450 °C with a a transition metal salt such as cadmium(II) fluoride or manganese(II) fluoride, or cobalt and thallium compound catalyst

Inputs

Process

  • First, Acrolein is formed in a Knoevenagel condensation from the acetaldehyde and formaldehyde
  • The acrolein is then condensed with acetaldehyde and ammonia to give Dihydropyridine
  • This is then oxidized with a solid-state catalyst to pyridine.

Outputs

  • The product consists of a mixture of pyridine, simple methylated pyridines (picolines and lutidines);

its composition depends on the catalyst used and can be adapted to the needs of the manufacturer via changing the catalyst accoordingly

Internal Links

External Links