Lubricating oil composite filter aid and preparation method thereof

Abstract

The invention discloses a lubricating oil composite filter aid and a preparation method thereof. The composite filter aid is prepared through the steps of preparing materials, acidizing, washing, drying, roasting, sieving and mixing. The composite filter aid is prepared from materials of inorganic mineral substances and organic cellulose, wherein the mass percent of the mineral substances is 50 to 90%, and the mineral substances are chosen from at least two of activated clay, kieselguhr, bentonite, activated carbon, perlite, zeolite, attapulgite, sepiolite, vermiculite, activated aluminum oxide, coal ash, steel slag micropowder and superfine slag powder; the proportion of the organic cellulose is 10 to 50%, and the organic cellulose is chosen from one or more of saw powder, wood bit, bagasse, bran, paper pulp, rice hull, bamboo residue, straw shred residue and lignocellulose. The lubricating oil composite filter aid has the advantages of convenience in use, quick filtering speed and good cleaned oil quality, capability of serving as a filtering agent in a lubricating oil clay refining period and suitablity for adsorbing and filtering technologies of other petroleum products, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of purification of waste lubricating oil, and in particular relates to a lubricating oil composite filter aid and a preparation method thereof. Background technique [0002] Lubricating oil mainly plays the role of lubrication, heat dissipation, speed regulation, flushing, shock absorption, insulation arc extinguishing, rust prevention, dust prevention, protection and sealing in equipment, and is used in rolling steel, machinery, electric power, transportation, chemical industry, petroleum and other fields widely. During the use of lubricating oil, it is affected by air, temperature, metal, friction, etc. After a certain period of time, it will deteriorate and become waste oil. [0003] In view of the serious situation of energy depletion and the pollution of waste lubricating oil to the environment, the regeneration of waste lubricating oil has attracted the attention of various countries. The regeneratio...

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Problems solved by technology

[0005] In order to increase the filtration speed and improve the quality of the purified liquid, after the inorganic minerals are often activated, they are used in a single or composite form for filter aids in liquid purification, but there are still some deficiencies in actual use, such as: disclosed in Chinese patent CN102167993A A method for purifying waste engine oil containing phosphating film, the proportion of activated clay is 3% of the waste oil, the oil quality after filtration is poor, and there is also a phenomenon that the oil product is oxidized due to high oil temperature; a kind of waste oil aid published by Chinese patent CN 102580680A Filter composition, due to the poor permeability of the filter medium and the short service life of the filter aid, the cost of filtration is greatly increased; the filter aid disclosed in Chinese patent CN 1108149A is composed of diatomite, bentonite and sodium silicate solution It is specially developed for beer filtration, and it is difficult to apply to oil purification because it has not been specially roasted; Chinese patent CN 102580398 discloses a rolling oil filtration method for aluminum foil rolling mills, and the addition ratio of diatomite and clay is 4 : 1. It is mainly developed to avoid the static electricity generated by the rolling oil tank due to local high temperature, thereby causing potential safety hazards. It is especially suitable for the filtering mode of stirring while shaking; Chinese patents CN 1440829A and CN1442225A disclose a full-flow deep adsorption fiber Purifier filter element and its preparation method, the filter element is made of sawdust, cotton fiber, hemp fiber, and coconut shell, but the rigidity and permeability of the filter layer are poor, and the filtration resistance is large, resulting in a short service life; China Patent CN 102000554A mixes diatomite filter aid waste residue with paper pulp used to make cardboard to form a solid, and then roasts it at 1100°C. In fact, the pulp has been ashed, and the regenerated filter aid has no paper cellulose. Synergy; Chinese patent CN 1244443A discloses a composite mineral-type filter aid, which is made by mixing minerals through processes such as crushing, winnowing, calcination, puffing, fluxing and calcination, and the preparation process is relatively complicated

[0006] Analyzing the reported filter aids related to lubricating oil filtration, it is found that in the actual use process, there are unsatisfactory permeability, short service life, and poor processability (such as high energy consumption for roasting above 1000 °C) ), the filtering effect needs to be further improved, etc.

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