FIELD: petroleum chemistry, chemical technology.
SUBSTANCE: crude alpha-olefin is heated, raw vinylidene olefins are isomerized in the presence of catalyst and alpha-olefin is separated from isomerized vinylidene olefin by rectification. Separation of alpha-olefin is carried out for at least two successive steps at similar temperatures on top of vat and reducing pressure of rectifying column at each following step. Condensed phase removing from top of the rectifying column at previous step is fed to feeding zone of the following step and the rectifying column at top and vat section is sprayed. For spraying the top section of column the condensed phase removing from the top of rectifying column at the same step is used and for spraying the vat section of column the vat liquid of rectifying column at the same step is used. Separated alpha-olefin is purified additionally from oxygen-containing impurities by adsorption up to polymerization degree of purity. Raw heating, isomerization, separation and adsorption are carried out in atmosphere in inert gas. The unit used for treatment of alpha-olefin includes reactor for isomerization of vinylidene olefins in raw, rectifying column wherein feeding zone is joined with reactor outlet and wherein alpha-olefin of high purity degree is removed from the column top. The unit includes also at least one rectifying column for additional treatment of alpha-olefin of high purity from isomerized vinylidene olefins and adsorption column for separation of oxygen-containing impurities in alpha-olefin of high purity wherein the column inlet is joined with the top outlet of the last rectifying column used for additional treatment of alpha-olefin of high purity and outlet is used for removing alpha-olefin of the polymerization purity degree. Invention provides enhancing quality of the end product.
EFFECT: improved method for treatment.
8 cl, 1 dwg, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
| 1-HEXENE PURIFICATION METHOD | 2001 |
|
RU2206557C1 |
| PROCESS OF PRODUCING BODY FOR LOW-FREEZING SYNTHETIC MOTOR OIL AND PLANT FOR IMPLEMENTATION THEREOF | 2003 |
|
RU2255963C1 |
| METHOD AND APPARATUS FOR ISOMERISATION OF C-C HYDROCARBONS WITH SUPPLY OF PURIFIED CIRCULATING HYDROGEN STREAM | 2013 |
|
RU2540404C1 |
| METHOD OF SEPARATION OF PETROL FRACTIONS IN THE ISOMERIZATION PROCESS | 2018 |
|
RU2680377C1 |
| HIGH-OCTANE GASOLINE ISO-COMPONENT PRODUCTION PROCESS | 2006 |
|
RU2307820C1 |
| ENERGY-SAVING DURING FRACTIONATION OF HEAVY HYDROCARBONS | 2010 |
|
RU2527284C1 |
| PAPER SIZING ADDITIVE, METHODS OF PRODUCING AND USING SAID ADDITIVES | 2009 |
|
RU2487870C2 |
| METHOD OF EXTRACTING PROPYLENE FROM A PROPANE-PROPYLENE FRACTION | 2020 |
|
RU2733380C1 |
| METHOD OF SELECTIVE HYDROGENATION OF DIOLEFINS (VERSIONS) | 1993 |
|
RU2120931C1 |
| METHOD OF ISOMERIZATION OF LUNG PETROL FILLINGS | 2017 |
|
RU2646751C1 |
