Novel catalytic process for arylamine aromatic hydrocarbon alkylation

Abstract

The invention discloses a novel catalytic process for arylamine aromatic hydrocarbon alkylation, belongs to the technical field of chemical synthesis, and can realize innovative introduction of a novel catalyst. The novel catalyst comprises a molecular sieve catalyst and a heat transfer catalytic fiber rod, an acidic center formed by protonic acid and aprotic acid is attached to the surface of a molecular sieve to form the catalyst with high activity and long service life, the catalyst is applied to a fixed bed reactor, the reaction process and the catalyst are fluoride-free and chlorine-free,and repeated utilization can be realized without backwashing. The introduced heat transfer catalytic fiber rod can improve the problem of poor heat transfer performance in the fixed bed reactor, notonly can realize rapid conduction and uniform distribution of heat, but also can trigger expansion and contraction actions of the fiber rods by the heat, so that reactant gas flows in a local range, and the reaction efficiency is improved. The catalytic reaction effect is improved through contact of the extruded gas and the molecular sieve catalyst, so that efficient and continuous production of alkylbenzene is realized.

Description

technical field [0001] The invention relates to the technical field of chemical synthesis, in particular to a novel catalytic process for the alkylation of aromatic amines and aromatic hydrocarbons. Background technique [0002] High-carbon (C20-24) alkylbenzenes are obtained from C20-24α-olefins through the alkylation reaction of catalysts and benzene. Higher-carbon alkylbenzene is sulfonated with sulfur trioxide to obtain higher-carbon alkylbenzenesulfonic acid (HLABS), and then undergoes neutralization and carbonation process to obtain higher-carbon alkylbenzenesulfonate calcium (HLABS-Ca). [0003] Calcium high-carbon alkylbenzene sulfonate is a kind of lubricant detergent, mainly used in the production of detergent T106. T106 has good high temperature thermal stability, oil solubility, anti-foaming property and water resistance. High alkali value, strong acid neutralization ability, good detergency and rust resistance. It is mainly used to prepare marine oil, medium ...

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Problems solved by technology

[0008] Aiming at the problems existing in the prior art, the object of the present invention is to provide a novel catalytic process for the alkylation of aromatic amines and aromatic hydrocarbons, which can realize innovative introduction of novel catalysts on the basis of existing production processes, and the novel catalysts include molecular sieve catalysts And heat transfer catalytic fiber rods, molecular sieve catalysts use acidic centers formed by protonic acids and aprotic acids to attach to the surface of molecular sieves to form catalysts with high activity and long service life. They are used in fixed bed reactors. The reaction process and catalysts are fluorine-free and non-toxic Chlorine, and can be reused without backwashing, and the introduction of heat transfer catalytic fiber rods can improve the problem of poor heat transfer performance in fixed bed reactors, not only can achieve rapid heat conduction and uniform distribution, but also can reduce heat To trigger its own expansion and contraction action, thereby causing the flow of the reactant gas in a local area, and improving the effect of the catalytic reaction by extruding the gas in contact with the molecular sieve catalyst, so as to realize the efficient and continuous production of alkylbenzene

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