JPS5945398A - Purification of lubricating oil - Google Patents

Abstract

PURPOSE:To purify crude lubricating oil in high purity industrially advantageously and to enable the repeated use of lubricating oil, by blowing an inert gas into a crude lubricating oil containing a low-boiling organic solvent while heating it at a specific temperature. CONSTITUTION:As a crude lubricating oil containing a low-boiling organic solvent preferably consisting of methylene chloride is heated at a temperature >=the boiling point of the solvent, >= the boiling point or decomposition temperature of the lubricating oil, to make the viscosity of the crude lubricating oil >=30cst (preferably >=20cst), an inert gas is blown into the crude lubricating oil in a rate of 2-5 times as much the inert gas as the crude lubricating oil by volume/minute, and the treatment is carried out usually for >=20min (preferably 1-3hr), to purify the crude lubricating oil.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on the present invention and contains a bath agent with a boiling point of 1.
4"ii MV oil industry 11 times a year ago, and moreover, there are 14 W-j that are industrially compatible with public interest.

Cutting, plastic processing, or atomization of gold 4.
In the production of gold powder, etc., lubricant oil is often used as C5 working oil or cooling oil. This 'si 1 go, got 7
11"・-5111 for metal processed products, metal powder, etc.
7 Since the oil is stained, it is generally washed with a low boiling point organic solvent such as /, /, /-) lichloric acid, methylene chloride, etc. to produce a product. The waste liquid discharged from the above-mentioned washing process is a mixed liquid of lubricant oil and a low-boiling point organic solvent, and the mixed liquid is usually subjected to partial partial distillation to separate and recover the low-boiling point organic solvent.

However, the removal rate of low-boiling organic solvents from the mixed liquid is low, and rj 4,
Contains a few percent of low #liA; 8 bath additives.

Therefore, if this is processed again once a month, problems will arise due to the low boiling point organic solvents contained therein. Se II
In the production of gold powder using the atomizer method, if the lubricating oil contains fak9 methylene chloride, the methylene chloride will decompose and corrode when it comes into contact with the molten metal. The power of sex naturally arises.

Problems will arise if Kinmen 14 powder is eaten up by the gas.廿、The above phenomenon also occurs due to Pf: frictional heat during cutting of gold A4, etc., resulting in a similar problem? cause.

On the other hand, l:'AI/l? Low boiling point in oil 'fi 44'
As a method for removing with one side production 14 Takasuke)), there is a method of using a stirring type thin light 1) installation (1゛1), but this)
Also by the i method;
l(i (Ill, / 5° stone around) low + 9 + i point'
r4434 hW #'l is 'tM rrnee iruko, and there is the said problem poppy 6 all 1c) γ [cancellation-IZ, Koto-ke' national precept'C. In addition, −) − symbol method ke”, equipment [I1
1. Driving 161 r) also costs fiY-, +
Application of l'1'-1 lubricant oil to the division of endogenous fit bunch 11 (which is disadvantageous).

Therefore, low boiling point i1i most solvent'@: *C+111
PJ ft'j? ill? Development of an old and economical method for refining a low-boiling point organic bath agent, for example, to reduce the concentration of 111τ1 to less than 9αppm with r +W accuracy (
・, ■2, +) 1 (note +tYjl ?i”i oil +I3
Toshikawa Riyo's disputed plane - In order to do so, this is a big topic from IIC.

The present invention disease, etc. ``1,'' 2nd report; title ketatta)) shi, 4th purpose of the study.

'F(jltneico result, tax+lQl m oil 9y
! 1':(:rj;Na++W+ 1. While heating to IJ-, the desired purpose is achieved by heating the inert gas (H) (5). 1. - ``It has come to be /ζ.

Thurs) 11-morning, low-boiling point organic solvent name/mouth ■) 7
1 to 1 When performing oil decontamination and refining, within the range of decoy 7'11 oil 1 degree point, ff, the boiling point of the lubricating oil or more, and the boiling point or decomposition concentration of the lubricating oil (IJ) - or less. Seven, the viscosity of crude oil! Will the ears be less than 30 centistokes? i'Heating to 11 degrees and blowing in gas./i
- This is a method for refining II-Kanwei oil.

In the present invention, the target lubricating oil is IF! relatively high boiling point (decomposition temperature for those without boiling point),
For example, oils having boiling points or decomposition temperatures of 300"C or higher are generally included. Specifically, machining oil such as cutting oil and rolling oil, machine oil such as gear oil and engine oil, cooling oil, etc. are contaminated. Organic solvents with a relatively low boiling point, e.g. 10
IL generally includes those that have a boiling point below 0°C. In particular, the effects of the present invention are expected to be applied to halogen-based printing machine solvents, especially chlorine-based organic bath agents. Specifically, C, methylene chloride, /.

/, /-) dichloroethane, trichlorethylene, chloroform, Freon R-//3, etc.

Among these, this obvious effect is most noticeable when methylene chloride is used.

Also, in Kizu 11 Akira, Fff1+1'Gaswo・1
, under the conditions of use, ay+l lubricating oil and low boiling point solvents are practically used]-7.
'll. -QI, ? ? Air, nitrogen, argon, oxygen, etc. are used for I++4. It is easy to obtain, economical, and suitable.

17 However, it is easy to contain floating substances such as dust and sludge, and it is likely to contain smudged oil when blowing gas, which will be described later. Since there is a stand for dyeing, please pre-heat the 11ζi-
It is preferable to remove the suspended matter by using a gas separator.
1'l, yes.

In the present invention, only a few solvents with low boiling points can be used. Including 1-. th
fil Jun? ff? 'all is the boiling point of the low boiling point organic solvent j≧J, soil, +Pl? iMioQ) Boiling point or 1.1 For those without boiling point, 1. +, -F target j,
Within the range, 1 sip of 1 ml of viscous oil is 0.20 sendest tox 1, preferably 0.20 sendest tox 1.
So, to and 2 grass, Ruding AM I9: tffL Karo%1,
1. -J is 54 (λ in %).l',: jj
! , :Force II iQ jrrA general is lower than the fil), both mentioned "A/,) No matter how low 11 is under the optimal conditions, the removal rate of low boiling point f1-like bath cutting It is possible to increase the number by jIj/, which is 1.Also, % ψ
1) If it is higher than 5 circles, it will invite 111 arrows of lubricant,
Depending on the meshing, f13'l lubricating oil may change in quality, resulting in p[usage rate h)chi. Furthermore, even if the temperature of the heated water falls within the above range, the viscosity of the f'11 lubricating oil will be 11[1] or more.
Even if the inert gas injection is carried out at the optimal Φ conditions as described above, a sufficient removal rate can be achieved. That is, heating that satisfies the above requirements can be achieved. By doing these things, the effect of inert gas blowing and the effect of heating work in tandem, and the removal rate of low-boiling organic solvents is significantly improved.

The method of heating roughening oil is not particularly limited. Examples of typical methods include an indirect heating method using a jacket, heating bath melting method, a direct heating method using a steam pipe, and a 7[l] air heater. A method of heating with an inert gas blowing into the J lubricant is also possible. Among these, a direct heating method is preferred from the viewpoint of ease of blowing the inert gas.

The most important requirement in the present invention is that the heated
A)2) In blowing inert scum into %1 lubricating oil.

By blowing in the inert gas, the removal rate of the low-boiling point 44-ton bathing agent is significantly increased, and the purpose of the present invention is to achieve the objective of the present invention.
I can do that. For the purpose of the blowing of the non-conductive gas (including its effects),
, Shizufu 1111 inertia blowing #Ak rough ribs γfV oil C, 2-, 5 times the amount, 1τ;/min, preferably i,
, L no 1. ,! 1'～Gui1su chopsticks Ht 7'Kato・notoga lit [2i. In other words, if the gas blowing -71h1 is too small, will it be low? ilf point if R', if agent sieving ai, upper JII self is small, conversely, if there is much, it will be effective: it1 tj'5)l It is not just a plow, but a small'l
(II oil splashing also invites the surname of υ・f - non-NIJ and 2.

Blowing the inert gas 9, method ii, /l'4+
&::-No restriction, any known method may be used. Generally &;1. , 1 hole naka pear 1, analogy Q; 1 porous moon 1q , 1: Rinarumo, ``1i-like body/raccoon kashibiki?''
・) Bamboo, Shirinaru 11:1.21j-shaped body blue hole 4-
・Open mother-in-law-111i1'+jrVj l'll
Open hole in l-1 inside? 'tB is I') Inactive 1'I
Hh 2'G? The method of supplying the light is 1>1°. The size of the hole 11・Qc42414=qi? To,
Shiri-(I!'1.VL limited edition 1 but θ, 3~
k Oram%Rj wise 1,/~yu θ111111
is -f1 (target, 1-.

Book 'R:', 1. The IIJ method can be carried out under any of the following conditions: depletion, normal pressure, and addition.
1': Target: f, no), in the case of L aM pressure, there are 4 layers. In addition, at ii% lj/j, the total passage in the crude oil is I-, which is a small active gas (, IILl: boiling point;
1) Since it contains Iso Y1), all of the organic solvent must be recovered using activated carbon and a condenser and then purged or used for private investigation.
4-I prefer (7).

In addition, the method of the present invention can be applied without particular control to any mixed solution consisting of a low-boiling point organic solvent and a sintered oil, but in particular, low-boiling point organic solvents can be completely distilled or distilled under reduced pressure. It is preferable to remove most of the inorganic solvent by eg, etc., and then apply it to the liquid, as it does not require a large-scale device to recover the inorganic solvent from the exhaust gas. Also, when blowing inert gas, i
Stirring is preferable since it can shorten the processing time.

The processing time according to the method of the present invention is not particularly limited, but
Generally, a time difference of 20 minutes or more, preferably 3 hours is sufficient.

As can be understood from the above explanation, the method of the present invention can advantageously refine crude lubricating oil at a commercial refining rate, making it possible to reuse lubricating oil. .

Hereinafter, the entire history of the present invention will be specifically explained with reference to Examples, but the present invention is limited to just one of these embodiments.
Li.

Incidentally, in the example, the -j gear 41i:1'' shown in FIG. 7 was used.

The device shown in FIG. 1 has air inside 8fζ and 11. Supply m winter hole pipe 2
And desorption town 6F3 wrestling JFa 8 k (#if it was transferable? I exist in the pool i1.11 nJ capable bathing hand middle 1
r (: 431.4'# There is also (1) -7z, the size of the Buddha 1b, the shaft of the hole of the porous tube is +), ≠゛, λ.

In addition, the temperature was measured by setting up one vortex bar within the circle of the ti-capacity container. f11th q- is a rotating cylindrical barrel IR1
・Measurement was made using

Example/ As a source of tears, cornichoke 37-. 2
0 (it?ir name: Futatsuki Oil Co., Ltd. iA), A] My 9 - method, know the iron powder Iq1 This is gemedylene chloride γ51゜汀1 Methylene chloride 73 j! I11 i1'n including 1jr496? 11
I took out the aburake. Jin no O It +1' Umami 11 Oil, +1
1 morning stay-G.

Most of the methylene clothoid 1c l・met times + 1'y,
12. RT of methylene chloride in the 2+1-hydrated γIJ oil
r+ r do', U! i fit, 1 shoulder. Add the method 1 (j) to the above coarse and small oil + Mii I
-, /c-0 shown in Figure 1 - No inside key: i result - e's i
Vessel 1 f/i,, ir# $111・1 seaweed oil i, s
. . Furthermore, If
A g and 9tj stirrer were attached and the hair was removed once.

result? Shown in Table 1. In addition, the viscosity of the liquid at that time and the pore diameter of the porous iE (for sudden air supply) are also shown.
・Category 5, low boiling point organic bath agents, temperature and viscosity during heating
The entire purification process was carried out in the same manner as described in Steps 1 to 1, except that the method was changed as shown in Table 2. The results are shown in the 1 flood lambda table.

REFERENCE EXAMPLE The Kozue 5'4fi'J oil obtained in Example 1 was used in the atomizer method and the iron powder tossing method. As a result, 22 pieces of iron powder were obtained, which were completely intact.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of making bean paste for embodying the method of Kimi 1. 1 is a container, 21d is a winter hole for introducing air, 8 is a stirring blade, and 4 is a water bath. Bamboo old-Dessin person Tokuyama Soda Co., Ltd.

Claims (3)

[Claims] (1) ITt ffu1 containing all low boiling point organic solvents
The Vr to be refined is within the range of -1 crude lubricating oil, low boiling point A1, above the boiling point of the solvent and below the boiling point or decomposition temperature of the lubricating oil, and the viscosity IW of the crude lubricating oil is 30 centes. A method for refining +FJ fN oil, which involves heating it to a temperature below 0.000 C and blowing an inert gas into it. (2) The low boiling point organic solvent is methylene chloride!
fMT The method according to claim 11. (3) The inert gas blowing M is 2 to 3 times the volume per minute of the Japanese IrrJt Majesty Oil W.