CN1962837A - Process for regeneration of waste lubricating oil - Google Patents

Abstract

The invention discloses a regenerating technique of waste lubricant in the product technical recycling domain, which comprises the following steps: depositing waste lubricant at 45-55 Deg C; centrifuging; separating; filtering; heating 60m3 waste lubricant to 50 Deg C; adding NaOH solution; stirring; heating to 55 Deg C; adding hydrogen oxide solution; heating continuously to 65 Deg C; depositing 24h; cooling to indoor temperature; discharging lower oil; adding 0.5% anhydrous AlCl3 in the upper oil; stirring to heat to 80 Deg C; stirring under constant temperature for 1h; cooling to indoor temperature; decoloring; filtering; adding 0.2% additive to obtain the standard lubricant; adopting composite dialkyl diphenylamine and polymethacrylate as additive.

Description

A kind of process for regeneration of waste lubricating oil

Technical field

The invention belongs to processing exhausted lubricant,, be specifically related to a kind of process for regeneration of waste lubricating oil to reclaim useful product technical field.

Background technology

Lubricating oil in use, because the oxygenizement of high temperature and air, meeting aged deterioration gradually, add friction means and grind the metal-powder that gets off, respiration and other reason and enter moisture in the oil, the impurity of invading from environment has not only polluted oil, and can also promote oxidation of lubricating oil.So, lubricating oil certain hour is rotten acquire a certain degree after, must change, thereby produce this reject product of waste lubricating oil.And along with country more opens up, mechanization degree is higher, the lubricating oil of usefulness also the more, waste lubricating oil is also corresponding to be increased.

Waste lubricating oil used to adopt and abandon, road oiling, burning, through removing heavy metal several method such as act as a fuel, these methods all can not effectively re-use waste lubricating oil, and are easier to cause environmental pollution.

The 45th page of king of total the 52nd phase of " heavy-duty car " 1999 the 3rd phases becomes triumphant " brief talking the simple and easy renovation process of lubricating oil " to disclose a kind of simple and easy renovation process of waste lubricating oil, main processes is: with 3～5% sodium hydroxide solution neutralization, temperature is advisable with about 70 ℃; For the bigger lubricating oil of viscosity, then adopt 1% concentration hydrogen sodium hydroxide solution, for avoiding emulsification, neutral temperature is brought up to 95～98 ℃, gentle agitation 15～20min, only otherwise produce emulsification, 1～2h just can isolate alkaline residue, washes then and dewaters.

Summary of the invention

The invention provides a kind of recovery technology of waste lubricating oil, it is simple to have technology, less investment, and the lubricating oil that is reclaimed meets relevant national standard fully.

The concrete technical scheme that the present invention adopts is as follows:

A kind of process for regeneration of waste lubricating oil is characterized in that, comprises the following steps:

1) waste lubricating oil is after 45 ℃ of-55 ℃ of following sedimentations, centrifugation, filtration;

2) get the waste lubricating oil 60m of step 1) ³Be warming up to 50 ℃, adding 120L concentration is 50% NaOH solution, stirs, and when being warming up to 55 ℃, adding 40L concentration is 30% superoxol, continues to be warming up to 65 ℃;

3) sedimentation 24h is cooled to room temperature, bleeds off the assorted oil in bottom, adds 0.5% anhydrous AlCl in the edible vegetable oil of top ₃, being heated to 80 ℃ under stirring, constant temperature is cooled to room temperature after stirring 1h, decolouring, filtration, the additive of adding 0.2% promptly gets qualified lubricating oil;

Described additive is that dialkylated diphenylamine and polymethacrylate are mixed.

To be dialkylated diphenylamine and polymethacrylate according to weight ratio 1: 1 mixed for described additive.

Invent described sedimentation and be and adopt the magnetic slurry tank, in this process of process that the part moisture in the waste lubricating oil and mechanical impurity are removed, oily temperature control is at 50 ± 5 ℃.

All raw materials that adopt among the present invention all are commercial goods.

Reaction mechanism of the present invention:

1) the present invention adopts the higher NaOH solution of concentration to be because organic acid reactions such as the naphthenic acid in NaOH solution and the oil, base acid, lipid acid phenol generate salt, Zao Heshui;

2) owing to all be added with a certain amount of detergency additive in the oil, add NaOH and H ₂O ₂, its suspension system is destroyed, the impurity coacervating large particle is and settlement separate, and its reaction mechanism is not gone definitely, is commonly considered as H ₂O ₂The class material is the survivor that sends out of free radical, can be enclosed in the peripheral extremities protective layer of impurity particle with destruction mainly being to produce transfer transport in " non-aqueous media ".

3) add AlCl ₃For at a certain temperature,, generate coarse-grained precipitation and allow its sedimentation the impurity in the waste oil and hydro carbons and its reaction.

Technology of the present invention has simply, less investment, and the finished lube that obtains meets national standard fully, thereby has reduced waste, has saved resource.

Description of drawings

Fig. 1 is a process flow sheet of the present invention

Embodiment

Embodiment

Handle waste internal-combustion engine oil according to the following step:

1) waste internal-combustion engine oil is 45 ℃ of-55 ℃ of following sedimentations, and centrifugation is filtered;

2) get the waste internal-combustion engine oil 60m of step 1) ³Be warming up to 50 ℃, adding 120L concentration is 50% NaOH solution, stirs, and when being warming up to 55 ℃, adding 40L concentration is 30% superoxol, continues to be warming up to 65 ℃; Sedimentation 24h is cooled to room temperature, bleeds off the assorted oil in bottom, adds the anhydrous AlCl of 0.5% (weight ratio) in the edible vegetable oil of top ₃, being heated to 80 ℃ under stirring, constant temperature is cooled to room temperature after stirring 1h, decolouring, filtration, the additive of adding 0.2% (weight ratio) promptly gets qualified rerefined oil; The quality index contrast situation of recovered oil sees Table 1.

To be dialkylated diphenylamine and polymethacrylate according to weight ratio 1: 1 mixed for described additive.

Table 1 fresh oil, waste oil, quality of reclaimed contrast table

Project	Fresh oil	Waste oil	Recovered oil
				Long-pending degree, mm2/s (100 ℃)	10.98	?11.8	?10.99
Acid number, mgKoH/g	0.16	?0.75	?0.17
				Carbon residue, %	0.40	?1.85	?0.41
Ash content, %	0.001	?0.65	?0.0015
				Mechanical impurity, %	0.016	?2.7	?0.017
Flash-point (opening), ℃	230	?150	?228
				Product are opened accurate strange corrosion, g/m2	725	?161.0	?74

Claims (2)

1. a process for regeneration of waste lubricating oil is characterized in that, comprises the following steps:

1) waste lubricating oil is after 45 ℃ of-55 ℃ of following sedimentations, centrifugation, filtration;

2) get the waste lubricating oil 60m of step 1) ³Be warming up to 50 ℃, adding 120L concentration is 50% NaOH solution, stirs, and when being warming up to 55 ℃, adding 40L concentration is 30% superoxol, continues to be warming up to 65 ℃;

3) sedimentation 24h is cooled to room temperature, bleeds off the assorted oil in bottom, adds 0.5% anhydrous AlCl in the edible vegetable oil of top ₃, being heated to 80 ℃ under stirring, constant temperature is cooled to room temperature after stirring 1h, decolouring, filtration, the additive of adding 0.2% promptly gets qualified lubricating oil;

Described additive is that dialkylated diphenylamine and polymethacrylate are mixed.

2. process for regeneration of waste lubricating oil according to claim 1, it is characterized in that described additive to be dialkylated diphenylamine and polymethacrylate according to weight ratio 1: 1 mixed.

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