A production device for refined dimer acid

Abstract

The invention discloses a device for producing refined dimer acid. According to a process, the device for producing refined dimer acid sequentially comprises a centrifugal separation device, a film evaporator and a molecular distillation device. The centrifugal separation device comprises a centrifuge, a separating tank and a drain pipe. The centrifuge comprises a casing, an upper cover, a drum, a light phase weir and a heavy phase weir. The device for producing refined dimer acid further comprises a high temperature waste gas treatment device. The high temperature waste gas treatment device performs condensation treatment on organic waste gas evaporated by a film evaporation device. The waste gas treatment device comprises a ventilation tank, a second pipe bundle condenser, a coil pipe and a refrigerating system. The device for producing refined dimer acid has the advantages of being simple in process and high in phosphorus removal efficiency, reducing device cost, being high in purification efficiency and having double condensation functions.

Description

Technical field [0001] The invention relates to the field of preparation of dimer acid, in particular to a production device of refined dimer acid. Background technique [0002] Dimer acid, usually refers to dimer fatty acid, is a complex mixture of ingredients, named because the main component contains two carboxylic acid groups. It is obtained by using unsaturated fatty acids such as oleic acid and linoleic acid through mutual polymerization. Dimer acid has excellent thermal stability and can maintain fluidity in a wide temperature range. Dimer acid is currently mainly used to synthesize polyamides, and about half of the synthetic neutral polyamides are used to prepare hot melt adhesives, followed by the production of inks. [0003] The domestic method for preparing dimer acid is the clay catalysis method. There are two processes in this method: one is the fatty acid methyl ester method, which uses various fatty acid methyl esters as raw materials, microcrystalline kaolin as a ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are the following shortcomings in the production of refined dimer acid: First, the centrifugal separation device usually only has a heavy phase outlet and a light phase outlet. After oil-water separation, the interface between the water phase and the oil phase is very thin, and the heavy phase A certain amount of oil will be taken out of the phase outlet, and a certain amount of water will be taken out of the light phase outlet, and the separation is insufficient, resulting in low phosphorus removal efficiency; and the production method of a dimer acid described in the patent application of the patent publication number CN103012110 Adopt two-step method for phosphorus removal, first wash with water, and then carry out secondary phosphorus removal through a centrifugal separation device

This method requires a variety of equipment to be used together, and has the disadvantages of complex process and low work efficiency

Second, the high-temperature organic waste gas evaporated by the thin-film evaporation device will pollute the environment if the treatment is not complete.

Images