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Method for regenerating waste lubricating oil through membrane separation

A waste lubricating oil and membrane separation technology, applied in the direction of semipermeable membrane separation, lubricating composition, chemical instruments and methods, etc., can solve the problems of high oil viscosity and low permeability, achieve convenient operation and solve high energy consumption , the effect of good application prospects

Inactive Publication Date: 2016-09-07
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the relatively high viscosity of the oil and the low permeability and other problems, there are still few reports on the treatment of waste lubricating oil by membrane separation technology.

Method used

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  • Method for regenerating waste lubricating oil through membrane separation
  • Method for regenerating waste lubricating oil through membrane separation
  • Method for regenerating waste lubricating oil through membrane separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Using the membrane separation method of the present invention to regenerate waste lubricating oil, the rolling oil produced by the DMS20-roll reversing cold rolling unit (Monobloc type) in the headquarter cold rolling plant of Shanghai Baosteel Stainless Steel Co., Ltd. is purified. Synthesize polyvinylidene fluoride ultrafiltration membrane first: disperse 80mg of graphene in 40g of N,N-dimethylformamide solvent, ultrasonically treat for 3 hours to obtain a dispersion; then 9g of PVDF and 1g of PVP powder are placed at 50°C Stir and dissolve in the dispersion liquid, stir for 24 hours, and then ultrasonicate for 2 hours to obtain a uniform casting solution; the casting solution is scraped by a film scraper to form a primary film, and the primary film is immersed in a coagulation bath for 10 minutes, and then transferred to a deionized water bath Soak in medium for 7 days to solidify and form a film, and then dry naturally to obtain a superhydrophobic polyvinylidene fluo...

Embodiment 2

[0021] Using the membrane separation method of the present invention to regenerate waste lubricating oil, the rolling oil produced by the DMS20-roll reversing cold rolling unit (Monobloc type) in the headquarter cold rolling plant of Shanghai Baosteel Stainless Steel Co., Ltd. is purified. Synthesize polyvinylidene fluoride ultrafiltration membrane first: disperse 40mg of graphene in 40g of N,N-dimethylformamide solvent, ultrasonic treatment for 3 hours to obtain dispersion liquid; then 8g of PVDF and 2g of PVP powder at 50℃ Stir and dissolve in the dispersion liquid, stir for 24 hours, and then ultrasonicate for 2 hours to obtain a uniform casting solution; the casting solution is scraped by a film scraper to form a primary film, and the primary film is immersed in a coagulation bath for 10 minutes, and then transferred to a deionized water bath Soak in medium for 7 days to solidify and form a film, and then dry naturally to obtain a superhydrophobic polyvinylidene fluoride ul...

Embodiment 3

[0027] Synthesize polyvinylidene fluoride ultrafiltration membrane first: disperse 10mg graphene in 70g N,N-dimethylformamide solvent, ultrasonic treatment for 12 hours to obtain a dispersion; then 10g PVDF and 3g PVP powder at 20°C Stir and dissolve in the dispersion liquid, stir for 3 hours, and then ultrasonicate for 1 hour to obtain a uniform casting solution; the casting solution is scraped by a film scraper to form a primary film, and the primary film is immersed in a coagulation bath for 45 minutes, and then transferred to a deionized water bath Soak in medium for 2 days to solidify and form a film, and then dry naturally to obtain a superhydrophobic polyvinylidene fluoride ultrafiltration membrane. The waste lubricating oil is first heated to 40°C, filtered with a slow-speed filter paper with a diameter of 11cm, and vacuumed with a water pump to speed up the filtration speed and remove large solid impurities; then dehydrate under vacuum, the vacuum dehydration temperatu...

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Abstract

The invention relates to a method for regenerating waste lubricating oil through membrane separation. The method comprises the following steps of: firstly heating the waste lubricating oil to 40 DEG C, carrying out rough filtration, then dehydrating under vacuum condition, then heating the dehydrated wasted lubricating oil to 40-90 DEG C, and finally carrying out membrane separation on the heated waste lubricating oil, so that regenerated base oil is obtained, wherein a membrane used in the membrane separation is a polyvinylidene fluoride ultrafiltration membrane subjected to blending modification by virtue of graphene, dehydrating temperature under the vacuum condition is 40-120 DEG C, and operating pressure in the membrane separation is 0.1-1MPa. Compared with the prior art, the method provided by the invention is simple in technology, easy to operate and low in energy consumption, does not pollute the environment, can well purify and regenerate the waste lubricating oil, has a good application prospect and also can be used for solving the problems of the traditional waste lubricating oil regeneration technology of high energy consumption, high temperature and high pressure, large occupying area, complex operation, high operation cost and serious environmental pollution.

Description

[technical field] [0001] The invention relates to the technical fields of petrochemical industry and membrane separation, in particular to a method for membrane separation and regeneration of waste lubricating oil. [Background technique] [0002] Based on the rapid development of the global economy, the use of lubricants continues to rise. The most important function of lubricants is to reduce friction and wear. Today, lubricants are used in a wide range of applications, such as internal combustion engines, vehicle and industrial gearboxes, turbines or hydraulic systems. A typical lubricating oil consists of 75% to 85% base oil and 15% to 25% additives. During the use of lubricating oil, some physical and chemical reactions will cause the lubricating oil to age, making it mixed with water, dust, metal shavings produced by mechanical wear, and carboxylic acids, organic acid salts, asphaltenes, and carbon residues produced by oxidation. , sludge, etc., the lubricating perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/00C10M175/06B01D71/34B01D67/00B01D61/14B01D61/22
CPCC10M175/0058B01D61/145B01D61/22B01D67/0011B01D67/0013B01D67/0016C10M175/0025C10M175/0075C10M175/0083C10M175/06
Inventor 韩生韦焕明兰国贤蔺华林付宁马鹏刘平周嘉伟钱伟刘玉萍刘金宝陈海军韩治亚
Owner SHANGHAI INST OF TECH
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