| 摘要 |
FIELD: petroleum chemistry, chemical technology. ^ SUBSTANCE: method involves at least two stages and each stage involves reaction zone(s) with strong acid solid catalyst and zone(s) of distillation off of unreacted C4-hydrocarbons and with feeding distilled off hydrocarbons after the first stage to the second stage. At the first stage chemical conversion is carried out in the presence of C1- or C2-alcohol and after distillation off of unreacted C4-hydrocarbons flow(s) containing mainly C1- or C2-alkyl-tert.-butyl ester and/or mixture of indicated ester with isobutene dimmers are removed. At the second stage hydrocarbon flow containing 3.5% of isobutene, not less, and impurities of C1- or C2-alcohol and other oxygen-containing compounds formed at the first stage is fed, and a polar component is fed also possibly wherein water is used in the molar ratio to isobutene = from 0.005:1 to 0.1:1, and/or (C1-C4)-alcohols(s). In reaction zone at the second stage is additional contact of C4-hydrocarbons with catalyst is carried out wherein conversion of isobutene is 50%, not less. After distillation off of unreacted C4-hydrocarbons vat flow is removed that comprises mainly dimmers of isobutene and/or co-dimers of isobutene with n.-butenes and/or C1- or C2-alkyl-tert.-butyl ester, and also possibly tert.-butanol and/or dimmers of n.-butenes. ^ EFFECT: improved processing method, enhanced effectiveness of process. ^ 10 cl, 4 dwg, 10 ex |
