Jilin petrochemical carbon five "birth" two patents
On December 1, 2013, jilin petrochemical research institute to receive the state intellectual property office of patent authorization certificate, on the carbon five cracker "birth" of two scientific research - used to inhibit oil pyrolysis carbon five fractions in pairs of olefin polymerization inhibitor and acetonitrile to separate oil pyrolysis carbon five fractions of double olefins method obtains the national invention patent.
In the comprehensive utilization of carbon five fractions, most has the use value is between pentadiene and isoprene, cyclopentadiene (double), its content of five total carbon content of 45% ~ 55%. Existing technology widely used method of extractive distillation or separation of azeotropic distillation method, process long, process complex, short running period, larger extraction solvent usage and circulation at the same time, the energy consumption is bigger also.
The institute of science and technology personnel development of acetonitrile to separate oil pyrolysis carbon five fractions in double olefins for a patent for invention solves the above problems. The patent through process optimization, reduce the solvent ratio, greatly reduce solvent usage, reduce solvent recovery tower and solvent analytic tower load; The heat integration technology, and the second solvent extraction rectification tower and analytic tower series technology, effectively reduce the energy consumption; Using alkynes technology improve device safety first; Recycled solvent refining technique to extend the device running cycle.
In the process of separation of dual olefins, usually adopt pressure operation, high operating temperature. And double olefins at higher temperature or likely to occur when in contact with oxide polymerization reaction, the generated polymer will affect plant operation to achieve a certain amount. Aiming at this problem, the institute of science and technology researchers developed a curb double olefin polymerization inhibitor. Compared with the existing technology, the patent to provide has better effect of polymerization inhibitor, can effectively inhibit oil cracking of the five carbon fraction occur from poly or double olefin copolymerization, avoiding reboiler blocking. Inhibitor dosage and chooses less solvent is the same as the extractive distillation solvent used, reducing the production costs and avoid introducing other impurities. At the same time, the inhibitor components and five distillate oil pyrolysis carbon boiling point difference is bigger, is easy to separate.