Since 1993, there have been Petroleum Research Institute in France, Texas Olefin Company-Phillips Petroleum Company in the United States, Mobil Company, UOP Company, Lyondell Petrochemical Company, BP Company in the United Kingdom, Snamprogetti Company in Italy, and Sinopec Shanghai Petrochemical Company in China. Research institutes and others announced their own development results on the molecular screening process and successfully applied for a patent, and then quickly realized industrial production.
Butene has four isomers: 1-butene, trans-2-butene, cis-2-butene, and isobutene. Interconversion between isomers occurs, forming a reversible reaction. High-difficulty isomerization reactions and low-difficulty isomerization reactions accompany each other and occur simultaneously. The ideal state is that the n-butene isomers can reach the balance of heat and concentration.
1 | 2-butene isomerization reaction
2-butene is composed of two isomers, trans-2-butene and cis-2-butene. The conversion between these two isomers is called isomerization-cis reaction. The isomerization reaction is shown in the figure below Show:
Under certain conditions, the cis-trans isomerization reaction of butene is very easy to occur. As long as the conditions are met, the isomerization reaction can also occur at ordinary room temperature. The chemical properties between trans-2-butene and cis-2-butene are similar without separation.
2 | Double bond isomerization reaction
In the case of satisfying the conversion conditions, 2-butene and 1-butene will undergo a double bond isomerization reaction, the formula is as follows:
3 | Carbon chain isomerization reaction
N-butene and isobutene are isomers of each other, and carbon chain isomerization reaction will occur when the conversion conditions are met
