Production equipment for dewater and desolvent of lubricating oil additive and its technological method

Abstract

The invention discloses a method for improving the dehydrating process and equipment for lubricant additive production, where for the equipment, flow baffle plate is welded inside solvent receiving tank and a return flow pump and return flow regulating valve is arranged between the solvent receiving tank and vacuum distilling kettle; the outlet pipeline of the condenser is equipped with exhaust valve and wedge-shaped; and for the process, the original method for dehydrating and desolventizing by direct vacuum distillation turns into a method that firstly makes return flow dehydration on solvent and then desolventizing by vacuum distillation. And it can shorten the dehydrating and desolventizing time from original 90 hours about to less than 10 hours, and largely reduce energy consumption and equipment utilization ratio.

Description

Technical field [0001] The invention relates to the technical field of lubricating oil additive production. In particular, it relates to the process and equipment improvement of water removal and solvent removal in the production process of lubricating oil additives. Background technique [0002] In the production process of the lubricating oil additive, the crude product of the lubricating oil additive is obtained after completing the reaction and filtering stages. At this time, the lubricating oil additive crude product contains not only the lubricating oil additive, but also nearly 40% of the total weight of gasoline solvent (the distillation range is 145-155° C.) and 1.8% of the total weight of water. In order to obtain qualified lubricating oil additive products, the production process of dehydration and desolventization must be carried out. The existing dehydration and desolventization production process is to remove this part of gasoline solvent and moisture by adop...

AI Technical Summary

Problems solved by technology

However, if the moisture content is to be reduced to less than 0.06% required by the product standard for lubricating oil additives, if only the vacuum distillation time is extended, the dehydration efficiency will become very low, the dehydration trend will become gentle, and the dehydration curve will form a platform. Had to spend another 90 hours or so to continue high temperature and reduced pressure distillation

This not only greatly prolongs the production cycle of additives, but also reduces other performance indicators of lubricating oil additives if the additives are heated at high temperature for a long time.

[0003] The main reason for the difficulty in dehydration in the production of lubricating oil additives is that after the gasoline solvent evaporates quickly, the remaining 0.2% of the water in the additive exists in the product in the form of bound water. According to the previous dehydration process, it is difficult to remove this part Water is freed from the product and removed efficiently

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