Preparation device for 100LL aero-engine fuel and saturated branched paraffin

The invention is suitable for the technical field of aviation fuels, and provides a 100LL aero-engine fuel, which comprises a base fuel and an additive, the base fuel comprises 90-98 parts of saturated branched paraffin and 8-15 parts of aromatic hydrocarbon; the saturated branched paraffin is prepared from 2 to 7 parts of C5 paraffin, 8 to 12 parts of C6 paraffin, 7 to 15 parts of C7 paraffin, 91 to 96 parts of C8 paraffin and 0.7 to 1 part of n-butane; the aromatic hydrocarbon comprises toluene and xylene; the additive comprises the following components in parts by weight: 1.4-1.75 parts of an antiknock agent, and the antiknock agent is tetraethyl lead ethyl liquid. The preparation method of the saturated branched-chain alkane comprises alkylation, primary rectification and secondary rectification. The invention also provides a preparation device of the saturated branched-chain alkane. Therefore, the invention has the advantages of simple components, few types and low cost; the catalyst has higher octane nu