4635-87-4Relevant articles and documents
A process for preparing 3 - pentenenitrile method
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Page/Page column 9-13, (2019/05/16)
The invention discloses a 2 - methyl - 2 - buten preparation 3 - pentenenitrile method, said method comprising: the 2 - methyl - 2 - buten in catalyst and double-[...] ligand under catalytic action of the isomerization reaction, in order to obtain 3 - pentenenitrile, wherein said catalyst is a transition metal with low monodentate phosphorus ligand complex. The method is simple in operation, easily available raw materials, high yield.
Process for producing pentenenitriles
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Page/Page column 26, (2018/04/20)
The invention provides methods useful in the industrial scale process for hydrocyanation of butadiene to adiponitrile for recycle of unwanted byproduct 2-methyl-3-butenenitrile (2M3BN) by conversion to process intermediate pentenenitrile. The invention provides a process for generating catalysts useful for carrying out the hydrocyanation of butadiene to adiponitrile, the process comprising contacting the 2M3BN and a solution of a nickel-ligand catalyst in cis-2-pentenenitrile (cis-2PN), trans-2-pentenenitrile (trans-2PN), or a mixture thereof. The improved methods of the invention can provide improved catalyst solubility for bidentate ligands without a requirement for a Lewis acid catalyst promoter such as zinc chloride to be present.
Synthetic hexanedinitrile pyprolylene law inhibiting phosphorus containing ligand degradation method
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Paragraph 0023-0024, (2017/04/03)
The invention discloses a method for inhibiting degradation of phosphorus containing ligand in process of synthesizing adiponitrile via a butadiene method, and the method comprises the step of adding organic alkali in isomerization reaction and secondary hydrocyanation reaction, wherein the organic alkali comprises triethylamine, diethylamine, dimethylamine, hexamethylenediamine, pyridine, phenylamine, phenylamine and N,N-dimethylaniline or N,N-diethylaniline. According to the method, organic alkali is added in the isomerization reaction and secondary hydrocyanation reaction, then the degradation of the phosphorus containing ligand in the isomerization reaction and secondary hydrocyanation reaction is effectively inhibited, and the degradation rate of the phosphorus containing ligand is controlled within 5%, so that the magnitude of recruitment of the phosphorus containing ligand is decreased, the separation recovery rate of the zero-valence nickel catalyst and the phosphorus containing ligand is improved at the same time and the raw material cost for synthesizing the adiponitrile via the butadiene method is reduced; and the method provided by the invention does not influence the conversion rate and the selectivity of the isomerization reaction and secondary hydrocyanation reaction.
