三、AromatictransformationChemical process of aromatic transformationCH3CH3酸催化剂CH3CH3CH3CH3CH酸催化剂CH3Isomerization reaction
CH3 CH3 CH3 CH3 酸 催 化 剂 CH3 CH3 CH3 CH3 酸催化剂 三、Aromatic transformation Isomerization reaction Chemical process of aromatic transformation
Disproportionation reactionCH3CH3Cat.2CH3TransalkylationreactionC2H5C2H5酸催化剂C.Hs/
Disproportionation reaction CH3 CH3 CH3 2 ＋ Transalkylation reaction C2H5 C2H5 C2H5 + 2 酸催化剂 Cat
AlkylationreactionR+ H,0+ R-OH, R-X, R-C=C-RAlkylation reagents: alcohol, olefin, halohydrocarbonCHs（气）+CH2=CH2C2H5（液）（液）+CH2CH2
Alkylation reaction （气）＋C H 2 C H 2 C2H5 （气） （液）＋C H 2 C H 2 C 2H 5（液） + R-OH ，R-X，R-C=C-R1 R + H2 O Alkylation reagents: alcohol, olefin, halohydrocarbon
Dealkylationreaction+ R-H (Thermal dealkylation)+H+ R-H (Hydrodealkylation)CH3+CH4LHCH+CH4+H2
Dealkylation reaction R + R-H + R-H + H2 (Hydrodealkylation) (Thermal dealkylation) CH3 ＋H2 ＋CH4 CH3 ＋H2 ＋CH4
4.2 Aromatic transformationDemand quantity of benzeneandp-xyleneisthebiggest,followed by o-xyleneToluene,andnotm-xylenearomaticsaresignificantly used in chemical industry so far
⚫ Demand quantity of benzene and p-xylene is the biggest, followed by o-xylene. ⚫ Toluene, m-xylene and C9 aromatics are not significantly used in chemical industry so far. 4.2 Aromatic transformation