Base oil prepared based on double metal cyanide complex catalyst and method thereof

By using a bimetallic cyanide complex catalyst preparation method, the problems of wide molecular weight distribution and high unsaturation in traditional polyether lubricating oils have been solved, resulting in polyether lubricating oil base oils with high viscosity index and narrow molecular weight distribution, which are suitable for high-end manufacturing industries.

CN122404693APending Publication Date: 2026-07-17NANTONG TENGLONG CHEM TECH CO LTD +1
4 Cites 0 Cited by

Patent Information

Application Number
CN202610465382.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-09
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional alkaline catalytic processes produce ethylene oxide or propylene oxide polyether lubricants, which suffer from problems such as wide molecular weight distribution and high terminal unsaturation, making it difficult to meet the needs of high-end applications.

Method used

A bimetallic cyanide complex catalyst was prepared by adding, filtering, and vacuum drying. The catalyst was then polymerized with an epoxide monomer and an initiator in a high-pressure reactor. Subsequent centrifugation and vacuum distillation were performed to obtain a polyether lubricating oil base oil with a narrow molecular weight distribution and a high viscosity index.

Benefits of technology

The prepared polyether lubricating oil base oil has a kinematic viscosity of 28-46 cSt at 100℃ and a kinematic viscosity of 169-253 cSt at 40℃, with a high viscosity index (205-243) and a narrow molecular weight distribution (1.08-1.65), meeting the needs of high-end applications.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention relates to the field of lubricating oil, in particular to base oil prepared based on a double-metal cyanide complex catalyst and a method thereof. The method comprises the following steps: respectively dissolving a metal zinc salt and a metal cyanide in a solvent, dropwise adding a metal cyanide solution into the metal zinc salt solvent, adding a ligand solution to react after dropwise adding, repeating the steps of filtering and slurrying for three times, and finally filtering and drying in vacuum to obtain the white amorphous double-metal cyanide complex catalyst. The method comprises the following steps: adding a double-metal cyanide complex catalyst, an alkylene oxide monomer and an initiator into a high-pressure reaction kettle, carrying out nitrogen replacement for multiple times, carrying out vacuum dehydration for 20 minutes, carrying out polymerization reaction for 3-12 hours, and finally, carrying out reduced pressure removal on residual monomers to obtain a polyether crude product; dissolving the polyether crude product in a good solvent, centrifuging, taking an upper polymer layer, and carrying out reduced pressure distillation to obtain the polyether lubricant base oil, the kinematic viscosity of the prepared polyether lubricant base oil at 100 DEG C is 28-46 cSt, the kinematic viscosity at 40 DEG C is 169-253 cSt, the viscosity index is high (205-243), and the molecular weight distribution is narrow (1.08-1.65).
Need to check novelty before this filing date? Find Prior Art