Energy-saving and environment-friendly continuous synthesis process and device for alkylphenylamine liquid antioxidant

Abstract

The invention discloses an energy-saving and environment-friendly continuous synthesis process and device for an alkylphenylamine liquid antioxidant and belongs to the technical field of synthesis ofalkylphenylamine liquid antioxidants. The technical scheme of the invention has the key points that materials including diphenylamine, olefin compounds and an activated clay catalyst for replenishingloss are preheated by a preheating kettle; a reaction is performed in a reaction kettle, and a reaction liquid is separated from the activated clay catalyst; and the reaction liquid is purified in a recovery kettle, the reaction liquid is filtered by a plate and frame filter, the addition amount of the activated clay catalyst is determined, and finally, the continuous synthesis of the alkylphenylamine liquid antioxidant is realized. By using the energy-saving and environment-friendly continuous synthesis process and device, the use frequency of activated clay is increased to the maximum extent, the finished product loss caused by clay adsorption is reduced to the maximum extent, the production cost is reduced, and resource waste is reduced.

Description

technical field [0001] The invention belongs to the technical field of synthesis of alkylaniline antioxidants, and in particular relates to a continuous synthesis process and synthesis device of energy-saving and environment-friendly alkylaniline liquid antioxidants. Background technique [0002] Alkylaniline antioxidant is a high-temperature antioxidant developed on the basis of phenolic antioxidants and amine antioxidants, and is one of the earliest antioxidants used in industry. Liquid alkylaniline has the advantages of non-volatility, easy compatibility and convenient addition of amine antioxidants, and can be widely used in oil products, plastics, rubber, hot-melt coatings and other industries. Especially in automotive lubricating oil, it can partially replace ZDDP metal antioxidants, and can make up for the defect that the anti-wear effect of ZDDP decreases after the phosphorus content decreases, so it is mass-produced. [0003] Alkylaniline antioxidants undergo an al...

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Problems solved by technology

[0006] This means that each production needs to consume a large amount of clay catalyst

The single production and use of clay catalyst has the following disadvantages: first, all the filtration of clay catalyst will cause a large workload of plate and frame filtration, and consume a lot of filtration time and power; The finished product, the quality of adsorption finished product in filter cake is usually 5%-10% of filter cake weight, and this just causes finished product yield to reduce; The pore structure of white clay is filled and blocked by the cooled oil, loses activity, cannot be reused, is almost non-renewable or has no regeneration value; Fourth, the combustion value of the filter cake itself is low, and the filter cake used in large quantities will be burned in the subsequent incineration treatment. It will generate toxic nitrogen oxides, pollute the environment and form large slags, which also cause environmental pollution and waste of resources to a certain extent

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