Process for continuously producing calcium naphthenate

Abstract

The invention discloses a process for continuously producing calcium naphthenate. The process comprises the following steps: (1) mixing naphthenic acid, methanol, dimethylbenzene and base oil to form a mixed oil raw material; (2) feeding the mixed oil raw material and a calcium hydroxide saturated solution in a first micro-tube type reactor, and carrying out neutralization reaction to obtain an intermediate product; (3) feeding the intermediate product and CO2 in a second micro-tube type reactor, and carrying out carbonation reaction to obtain a coarse product; and (4) directly feeding the coarse product into a coarse product tank from an outlet of the second micro-tube type reactor, distilling the coarse product and carrying out settling filtration on the coarse product to obtain the final product. The process has the beneficial effects that three-phase synthesis of high-base-number nano petroleum calcium naphthenate is carried out in a micro-reaction system, reaction materials can be micro-mixed uniformly instantaneously, the form and the particle size distribution of nanoparticles are controlled effectively, the production efficiency and the quality of products are improved, and stable continuous operation is realized.

Description

technical field [0001] The invention relates to a process for producing calcium naphthenate, in particular to a process for continuously producing calcium naphthenate, and belongs to the technical field of chemical industry. Background technique [0002] Naphthenate additives are the first class of detergent and dispersants for lubricating oils. In the early days, people used the method of metathesis to prepare the neutral salt of naphthenic acid. The neutral salt of naphthenic acid not only has a certain cleaning and dispersing performance, but also has good stability, which can greatly improve the performance of lubricating oil. With the advancement of overalkalinization technology, it has been found that overbased naphthenate products, especially those synthesized from heavy petroleum acid, have better performance. [0003] The synthesis process of high alkali value naphthenate includes two reaction processes of synthesis of normal salt (neutral salt) and carbonation (ov...

AI Technical Summary

Problems solved by technology

[0008] 1. The process is complex and the technical requirements for process equipment are high;

[0009] 2. Long reaction time, low production efficiency, high material consumption and energy consumption;

[0010] 3. The system contains three phases of oil, water, and gas. It is difficult for traditional stirring devices to ensure uniform mixing and efficient mass transfer of the three phases, resulting in uneven distribution of inner carbonate particle size and insufficient particle size. The product has high turbidity, poor fluidity and stability;

[0011] 4. The technical control of the process is difficult, the product quality repeatability between different batches is poor, and the product is difficult to scale up step by step, etc.