CN113698980B - Hydraulic oil product light stabilizer and preparation process thereof - Google Patents
Hydraulic oil product light stabilizer and preparation process thereof Download PDFInfo
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- CN113698980B CN113698980B CN202111113847.7A CN202111113847A CN113698980B CN 113698980 B CN113698980 B CN 113698980B CN 202111113847 A CN202111113847 A CN 202111113847A CN 113698980 B CN113698980 B CN 113698980B
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- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M177/00—Special methods of preparation of lubricating compositions; Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes
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Abstract
The invention relates to the technical field of mechanical oil, in particular to a hydraulic oil product light stabilizer, which comprises the following components in percentage by weight: 0.2-2% of binding agent, 0.1-1% of ultraviolet absorbent, 2-10% of medium oil, 0.1-0.5% of pour point depressant, 0.2-2% of active agent, 0.5-1% of defoaming agent, 0.5-3% of antioxidant and the balance of base oil. The light stabilizer prepared by the invention is oily liquid, is convenient to add, has good solubility in hydraulic oil, does not generate precipitate, is not easy to burn, does not explode, has no corrosiveness and no pungent smell, can effectively prevent 32# antiwear hydraulic oil, 46# antiwear hydraulic oil and 68# antiwear hydraulic oil meeting the GB11118.1-2011 standard from generating photooxidation deterioration when contacting with ultraviolet light, and has the problems of precipitation and oil discoloration.
Description
Technical Field
The invention relates to the technical field of mechanical oil, in particular to a hydraulic oil product light stabilizer and a preparation process thereof.
Background
The hydraulic oil is a hydraulic medium used by a hydraulic system utilizing hydraulic pressure energy, and plays roles in energy transmission, wear resistance, system lubrication, corrosion resistance, rust resistance, cooling and the like in the hydraulic system. For hydraulic oil, the requirement of the hydraulic device on the viscosity of the liquid at the working temperature and the starting temperature is met, and the viscosity change of the lubricating oil is directly related to the hydraulic action, the transmission efficiency and the transmission precision, so that the viscosity-temperature performance and the shear stability of the oil are required to meet various requirements of different purposes.
At present, in order to maintain the stability of hydraulic oil, a light stabilizer is usually added into the hydraulic oil to ensure that the hydraulic oil has more stable property under the irradiation of ultraviolet rays and ensure the safety of equipment.
However, most of the existing oil light stabilizers are solid particles or powder, and are required to be stirred and melted during use, and are easy to generate precipitation. Meanwhile, the existing process and equipment for preparing the light stabilizer are rough, and particularly a stirring device for stirring raw materials is low in efficiency, so that not only is the resource loss high, but also the quality of the light stabilizer is affected. In view of the above, we propose a hydraulic oil product light stabilizer and a preparation process thereof.
Disclosure of Invention
The invention aims to provide a hydraulic oil product light stabilizer and a preparation process thereof, so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: the hydraulic oil product light stabilizer comprises the following components in percentage by weight: 0.2-2% of binding agent, 0.1-1% of ultraviolet absorbent, 2-10% of medium oil, 0.1-0.5% of pour point depressant, 0.2-2% of active agent, 0.5-1% of defoaming agent, 0.5-3% of antioxidant and the balance of base oil.
The preparation process of the hydraulic oil product light stabilizer comprises the following steps:
s1: mixing an antioxidant and a base oil agent according to the weight ratio of 1:10-15 to obtain a component A;
s2: mixing an ultraviolet absorbent and a base oil agent according to the weight ratio of 1:10-20 to obtain a component B;
s3: mixing an antioxidant binding agent, a vehicle oil, a pour point depressant, an active agent and a defoaming agent, and then mixing with a base oil agent according to the weight ratio of 1:10-15 to obtain a component C;
s4: the component A, the component B and the component C are mixed and stirred by a stirring device to obtain the uniform hydraulic oil light stabilizer.
Preferably, the ultraviolet absorbent is any one or a combination of at least two of ultraviolet absorbent UV-P, ultraviolet absorbent UV-O, ultraviolet absorbent UV-9, ultraviolet absorbent UV-531, ultraviolet absorbent UV-571, ultraviolet absorbent UVP-327 and ultraviolet absorbent RMB, the defoaming agent is an organosilicon defoaming agent, the pour point depressant is any one of alkyl naphthalene, polymethacrylate and poly-a-olefin, the active agent is an anionic active agent, and the antioxidant is an amine antioxidant.
Preferably, the stirring device comprises a stirring tank, a feeding plate is fixedly arranged on the stirring tank, a stirring motor is fixedly arranged at the bottom of the stirring tank, a rotating rod is fixedly connected to a motor shaft of the stirring motor, a dispersing cylinder is fixedly connected to the rotating rod, fins are fixedly arranged on the dispersing cylinder, a suction structure with a rope pulling driving function is arranged in the dispersing cylinder, a driving rope is fixedly connected to the suction structure, the driving rope is in penetrating connection with a rope sleeve, a hook is fixedly arranged on the driving rope, and a suction structure with an overload avoiding function is arranged on the inner wall of the stirring tank.
Preferably, the dispersing cylinder is vertically arranged on the rotating rod, at least three dispersing cylinders are arranged, the fins are of a flat plate structure and are arranged on the outer wall of the dispersing cylinder, and the dispersing cylinder is of a single-side opening structure.
Preferably, the suction structure comprises a piston which is slidably arranged in the dispersing cylinder, a piston rod is fixedly connected to the piston, a pull rope is fixedly connected to the piston rod and is slidably connected to the bleeding plug and the steering ring, the pull rope is fixedly connected to the sliding block, the sliding block is slidably connected to the guide rail, a connecting rod is fixedly connected to the sliding block, and the driving rope is connected with the connecting rod.
Preferably, the couple is installed in the tip of driving rope, and fag end fixed mounting is on the dispersion section of thick bamboo, inhale and hang the structure including installing the mount pad on the agitator tank inner wall, and be connected with the dog through reset hinge rotation on the mount pad, fixed mounting has the base on the mount pad, and is connected with the spring steel ball on the base, the dog bottom is provided with the hemisphere constant head tank, fixed mounting has the push rod on the mount pad.
Compared with the prior art, the invention has the beneficial effects that:
1. the light stabilizer prepared by the invention is oily liquid, is convenient to add, has good solubility in hydraulic oil, does not generate precipitate, is not easy to burn or explode, has no corrosiveness or pungent smell, and can effectively prevent the 32# antiwear hydraulic oil, 46# antiwear hydraulic oil and 68# antiwear hydraulic oil which meet the GB11118.1-2011 standard from generating photooxidation deterioration when contacting with ultraviolet light, and the problems of precipitation and oil discoloration occur;
2. when the light stabilizer is used, the light stabilizer can be added between 0.5% and 5% in proper amount according to working conditions, and is directly added into a hydraulic oil product production line according to liquid proportion and uniformly mixed. The method is applicable to the preparation, preparation or final use of hydraulic oil, and can keep the stability of the color of the oil product and the quality of the product;
3. the invention designs a high-efficiency oil intermediate product stirring device aiming at the preparation process of the light stabilizer, wherein a stirring motor drives a rotating rod to rotate in the stirring device, and a dispersing cylinder with fins is arranged on the rotating rod, so that a vortex can be formed in a stirring tank in the rotating process, various oil agents can be helped to be rapidly dispersed, meanwhile, a suction hanging structure is used as a passive driving force along with the rotation of the dispersing cylinder, and the position of oil liquid can be transferred through a suction structure, so that the dispersing efficiency is further increased.
Drawings
FIG. 1 is a schematic view of a tank structure of the present invention;
FIG. 2 is a schematic view of a dispersion structure according to the present invention;
FIG. 3 is a schematic view of a pumping structure of the present invention;
FIG. 4 is a schematic view of a suction structure according to the present invention;
fig. 5 is an enlarged schematic view of the area a in fig. 2.
In the figure: the stirring tank 1, a feeding plate 2, a stirring motor 3, a rotating rod 4, a dispersing cylinder 5, fins 6, a piston 7, a piston rod 8, a pull rope 9, a bleeding plug 10, a steering ring 11, a sliding block 12, a guide rail 13, a connecting rod 14, a driving rope 15, a rope sleeve 16, a hook 17, a mounting seat 18, a reset hinge 19, a stop 20, a base 21, a spring steel ball 22 and a push rod 23.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 to 5, the present invention provides a technical solution: the hydraulic oil product light stabilizer comprises the following components in percentage by weight: 0.2-2% of binding agent, 0.1-1% of ultraviolet absorbent, 2-10% of medium oil, 0.1-0.5% of pour point depressant, 0.2-2% of active agent, 0.5-1% of defoaming agent, 0.5-3% of antioxidant and the balance of base oil.
The preparation process of the hydraulic oil product light stabilizer comprises the following steps:
s1: mixing an antioxidant and a base oil agent according to the weight ratio of 1:10-15 to obtain a component A;
s2: mixing an ultraviolet absorbent and a base oil agent according to the weight ratio of 1:10-20 to obtain a component B;
s3: mixing an antioxidant binding agent, a vehicle oil, a pour point depressant, an active agent and a defoaming agent, and then mixing with a base oil agent according to the weight ratio of 1:10-15 to obtain a component C;
s4: the component A, the component B and the component C are mixed and stirred by a stirring device to obtain the uniform hydraulic oil light stabilizer.
The ultraviolet absorbent is any one or a combination of at least two of ultraviolet absorbent UV-P, ultraviolet absorbent UV-O, ultraviolet absorbent UV-9, ultraviolet absorbent UV-531, ultraviolet absorbent UV-571, ultraviolet absorbent UVP-327 and ultraviolet absorbent RMB;
example 1
The hydraulic oil product light stabilizer comprises the following components in percentage by weight: 0.6% of binding agent, 1% of ultraviolet absorbent, 8% of medium oil, 0.5% of pour point depressant, 0.2% of active agent, 0.5% of defoaming agent, 1% of antioxidant and the balance of base oil.
The preparation process of the hydraulic oil product light stabilizer comprises the following steps:
s1: mixing an antioxidant and a base oil agent according to a weight ratio of 1:12 to obtain a component A;
s2: mixing an ultraviolet absorbent and a base oil agent according to the weight ratio of 1:15 to obtain a component B;
s3: mixing an antioxidant binding agent, a vehicle oil, a pour point depressant, an active agent and a defoaming agent, and then mixing with a base oil agent according to the weight ratio of 1:10 to obtain a component C;
s4: the component A, the component B and the component C are mixed and stirred by a stirring device to obtain the uniform hydraulic oil light stabilizer.
Example 2
The hydraulic oil product light stabilizer comprises the following components in percentage by weight: 1% of binding agent, 0.2% of ultraviolet absorbent, 3% of medium oil, 0.3% of pour point depressant, 1.5% of active agent, 0.5% of defoaming agent, 1% of antioxidant and the balance of base oil.
The preparation process of the hydraulic oil product light stabilizer comprises the following steps:
s1: mixing an antioxidant and a base oil agent according to a weight ratio of 1:12 to obtain a component A;
s2: mixing an ultraviolet absorbent and a base oil agent according to the weight ratio of 1:20 to obtain a component B;
s3: mixing an antioxidant binding agent, a vehicle oil, a pour point depressant, an active agent and a defoaming agent, and then mixing with a base oil agent according to the weight ratio of 1:15 to obtain a component C;
s4: the component A, the component B and the component C are mixed and stirred by a stirring device to obtain the uniform hydraulic oil light stabilizer.
Example 3
The hydraulic oil product light stabilizer comprises the following components in percentage by weight: 0.2% of binding agent, 0.8% of ultraviolet absorbent, 10% of medium oil, 0.1% of pour point depressant, 1.6% of active agent, 1% of defoaming agent, 2% of antioxidant and the balance of base oil.
The preparation process of the hydraulic oil product light stabilizer comprises the following steps:
s1: mixing an antioxidant and a base oil agent according to a weight ratio of 1:10 to obtain a component A;
s2: mixing an ultraviolet absorbent and a base oil agent according to a weight ratio of 1:10 to obtain a component B;
s3: mixing an antioxidant binding agent, a vehicle oil, a pour point depressant, an active agent and a defoaming agent, and then mixing with a base oil agent according to the weight ratio of 1:10 to obtain a component C;
s4: the component A, the component B and the component C are mixed and stirred by a stirring device to obtain the uniform hydraulic oil light stabilizer.
The new product prepared according to the scheme is oily liquid, is convenient to add, has good solubility in hydraulic oil, and does not generate precipitation.
In the three embodiments, the final product is transparent oily liquid, is not easy to burn, does not explode, has no corrosiveness and has no pungent smell. The anti-wear hydraulic oil of No. 32, no. 46 and No. 68 meeting the GB11118.1-2011 standard can be effectively prevented from photo-oxidative deterioration, precipitation and oil discoloration when being contacted with ultraviolet light.
When in use, the hydraulic oil can be added between 0.5% and 5% in proper amount according to working conditions, directly added into a hydraulic oil product production line according to liquid proportion and uniformly mixed. The method is applicable to the stages of hydraulic oil blending, manufacturing or final use, and can keep the stability of the color of the oil product and the quality of the product.
The stirring device comprises a stirring tank 1, a feeding plate 2 is fixedly installed on the stirring tank 1, a stirring motor 3 is fixedly installed at the bottom of the stirring tank 1, a rotating rod 4 is fixedly connected to a motor shaft of the stirring motor 3, a dispersing cylinder 5 is fixedly connected to the rotating rod 4, fins 6 are fixedly installed on the dispersing cylinder 5, a suction structure with a rope pulling driving function is installed in the dispersing cylinder 5, a driving rope 15 is fixedly connected to the suction structure, the driving rope 15 is connected in a rope sleeve 16 in a penetrating manner, a hook 17 is fixedly installed on the driving rope 15, and a suction structure with an overload avoiding function is installed on the inner wall of the stirring tank 1;
the dispersing cylinders 5 are vertically arranged on the rotating rod 4, at least three dispersing cylinders 5 are arranged, the fins 6 are of a flat plate structure and are arranged on the outer wall of the dispersing cylinders 5, and the dispersing cylinders 5 are of a single-side opening structure;
according to the preparation process of the light stabilizer, the components A, B, C are required to be put into the stirring tank 1 together for mixing, the feeding plate 2 can bear a container, the pouring difficulty of component raw materials is reduced, after the components are added, the stirring motor 3 drives the rotating rod 4 to rotate, the dispersing cylinder 5 with the fins 6 is arranged on the rotating rod 4, vortex can be formed in the stirring tank 1 in the rotating process, various oil agents can be helped to be rapidly dispersed, and meanwhile, the position of oil liquid can be transferred through the suction structure along with the rotation of the dispersing cylinder 5, so that the dispersing efficiency is further improved;
the suction structure comprises a piston 7 which is slidably arranged in the dispersing cylinder 5, a piston rod 8 is fixedly connected to the piston 7, a pull rope 9 is fixedly connected to the piston rod 8, the pull rope 9 is slidably connected to a bleeding plug 10 and a steering ring 11, the pull rope 9 is fixedly connected to a sliding block 12, the sliding block 12 is slidably connected to a guide rail 13, a connecting rod 14 is fixedly connected to the sliding block 12, and a driving rope 15 is connected with the connecting rod 14;
in the pumping structure, the connecting rod 14 is pulled through the driving rope 14, the sliding block 12 is driven to slide in the guide rail 13, the pull rope 9 is pulled, the pull rope 9 is guided by the steering ring 11 and the bleeding plug 10 to generate a pulling force to act on the piston rod 8, the piston 7 can be driven to move, a pumping force is generated, liquid is temporarily stored in the dispersing cylinder 5, a spring structure (not shown in the figure) for resetting is further connected to the piston rod 8, when the pulling force of the driving rope 14 is eliminated, the piston 7 is reset, stored oil is extruded, and in the process, the oil is transferred to the position, so that the mixing of the oil in the stirring tank 1 is accelerated, and the production efficiency of a light stabilizer is improved;
the hook 17 is arranged at the end part of the driving rope 15, the rope sleeve 16 is fixedly arranged on the dispersing cylinder 5, the suction hanging structure comprises a mounting seat 18 arranged on the inner wall of the stirring tank 1, a stop block 20 is rotationally connected to the mounting seat 18 through a reset hinge 19, a base 21 is fixedly arranged on the mounting seat 18, a spring steel ball 22 is connected to the base 21, a hemispherical positioning groove is arranged at the bottom of the stop block 20, and a push rod 23 is fixedly arranged on the mounting seat 18;
the driving rope 15 is briefly connected with the suction hanging structure through the hook 17, a pulling force is generated in the driving rope 15, so that the suction structure is driven, the process is stopped by the stop block 20 when the hook 17 moves to the position of the mounting seat 18 during use, the stop block 20 is hung on the hook, the spring steel ball 22 is clamped at the bottom of the stop block 20 when the piston 7 has mobility, the stop block 20 is simply fixed, the hook 17 can be hung, the driving rope 15 is pulled, the suction structure is driven, when the piston 7 moves to the limit position, the driving rope 15 does not have the pulling capability any more, the hook 17 can push the stop block 20 down, the separation is realized, and the push rod 23 can also help the stop block to be separated, so that the blocking is prevented.
The working principle of the stirring device is as follows: firstly, according to the preparation process of the light stabilizer, components A, B, C are required to be put into a stirring tank 1 together for mixing, a feeding plate 2 can bear a container, the difficulty of pouring component raw materials is reduced, after the components are added, a rotating rod 4 is driven to rotate by a stirring motor 3, a dispersing cylinder 5 with fins 6 is arranged on the rotating rod 4, a vortex can be formed in the stirring tank 1 in the rotating process, various oil agents can be helped to complete rapid dispersion, and meanwhile, the position of oil liquid can be transferred through a suction structure along with the rotation of the dispersing cylinder 5, so that the dispersing efficiency is further improved; the suction structure is connected with the driving rope 15, the driving rope 15 is temporarily connected with the suction hanging structure through the hook 17, tension is generated in the driving rope 15, thereby driving the suction structure, the process is carried out by means of the rotation of the dispersing cylinder 5, when the hook 17 moves to the position of the mounting seat 18, the hanging is blocked by the stop block 20, when the piston 7 has mobility, the spring steel ball 22 is clamped at the bottom of the stop block 20, the stop block 20 is simply fixed, the hook 17 can be hung, tension is generated on the driving rope 15, driving of the suction structure is carried out, in the suction structure, the driving rope 14 pulls the connecting rod 14, and then drives the sliding block 12 to slide in the guide rail 13, the pull rope 9 pulls, the pull rope 9 generates tension by means of the steering ring 11 and the guidance of the bleeding plug 10, the piston rod 8 can drive the piston 7 to move, the suction force is generated, liquid is stored in the dispersing cylinder 5, and the piston rod 8 is also connected with a spring structure (not drawn in the figure) for resetting, the damping piston 7 can be reset at the damping rope 14, the damping device can reset, the stirring efficiency is increased, and the oil can be completely stirred in the process is completely, and the stirring tank is completely mixed.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. A preparation process of a hydraulic oil product light stabilizer is characterized by comprising the following steps: the light stabilizer comprises the following components in percentage by weight: 0.2-2% of binding agent, 0.1-1% of ultraviolet absorbent, 2-10% of medium oil, 0.1-0.5% of pour point depressant, 0.2-2% of active agent, 0.5-1% of defoaming agent, 0.5-3% of antioxidant and the balance of base oil;
the preparation process comprises the following steps:
s1: mixing an antioxidant and a base oil agent according to the weight ratio of 1:10-15 to obtain a component A;
s2: mixing an ultraviolet absorbent and a base oil agent according to the weight ratio of 1:10-20 to obtain a component B;
s3: mixing an antioxidant, a binding agent, a vehicle oil, a pour point depressant, an active agent and a defoaming agent, and then mixing with a base oil agent according to the weight ratio of 1:10-15 to obtain a component C;
s4: the component A, the component B and the component C are mixed and stirred through a stirring device to obtain a uniform hydraulic oil light stabilizer; the stirring device comprises a stirring tank (1), wherein a feeding plate (2) is fixedly arranged on the stirring tank (1), a stirring motor (3) is fixedly arranged at the bottom of the stirring tank (1), a rotating rod (4) is fixedly connected to a motor shaft of the stirring motor (3), a dispersing cylinder (5) is fixedly connected to the rotating rod (4), fins (6) are fixedly arranged on the dispersing cylinder (5), a suction structure with a rope pulling driving function is arranged in the dispersing cylinder (5), a driving rope (15) is fixedly connected to the suction structure, the driving rope (15) is connected in a rope sleeve (16) in a penetrating manner, a hook (17) is fixedly arranged on the driving rope (15), and a suction and hanging structure with an overload avoiding function is arranged on the inner wall of the stirring tank (1); the dispersing cylinders (5) are vertically arranged on the rotating rod (4), at least three dispersing cylinders (5) are arranged, the fins (6) are of a flat plate structure and are arranged on the outer wall of the dispersing cylinders (5), and the dispersing cylinders (5) are of a single-side opening structure; the suction structure comprises a piston (7) which is slidably arranged in a dispersing cylinder (5), a piston rod (8) is fixedly connected to the piston (7), a pull rope (9) is fixedly connected to the piston rod (8), the pull rope (9) is slidably connected to a bleeding plug (10) and a steering ring (11), the pull rope (9) is fixedly connected to a sliding block (12), the sliding block (12) is slidably connected to a guide rail (13), a connecting rod (14) is fixedly connected to the sliding block (12), and a driving rope (15) is connected with the connecting rod (14); the utility model discloses a stirring tank, including stirring tank, couple (17) are installed in the tip of driving rope (15), and fag end (16) fixed mounting is on dispersion section of thick bamboo (5), inhale and hang structure including installing mount pad (18) on stirring tank (1) inner wall, and be connected with dog (20) through reset hinge (19) rotation on mount pad (18), fixed mounting has base (21) on mount pad (18), and is connected with spring steel ball (22) on base (21), dog (20) bottom is provided with hemisphere constant head tank, fixed mounting has push rod (23) on mount pad (18).
2. The process for preparing the hydraulic oil product light stabilizer according to claim 1, which is characterized in that: the ultraviolet absorber is any one or a combination of at least two of ultraviolet absorber UV-P, ultraviolet absorber UV-O, ultraviolet absorber UV-9, ultraviolet absorber UV-531, ultraviolet absorber UV-571, ultraviolet absorber UVP-327 and ultraviolet absorber RMB, the defoaming agent is an organosilicon defoaming agent, the pour point depressant is any one of alkyl naphthalene, polymethacrylate and poly-a-olefin, the active agent is an anionic active agent, and the antioxidant is an amine antioxidant.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113960A (en) * | 2013-01-29 | 2013-05-22 | 安徽凯奥润滑油科技有限公司 | Light stabilizer composition of hydrogenated stock oil and application thereof |
| CN207430210U (en) * | 2017-11-06 | 2018-06-01 | 圣保路石油化工（天津）股份有限公司 | A kind of lubricating oil reconciliation kettle of integration driving |
| CN111139118A (en) * | 2019-12-26 | 2020-05-12 | 山东源根石油化工有限公司 | Environment-friendly energy-saving hydraulic oil and preparation method thereof |
| CN112625781A (en) * | 2020-12-21 | 2021-04-09 | 山东恒利热载体工程技术有限公司 | Oil product light stabilizer |
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2021
- 2021-09-23 CN CN202111113847.7A patent/CN113698980B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103113960A (en) * | 2013-01-29 | 2013-05-22 | 安徽凯奥润滑油科技有限公司 | Light stabilizer composition of hydrogenated stock oil and application thereof |
| CN207430210U (en) * | 2017-11-06 | 2018-06-01 | 圣保路石油化工（天津）股份有限公司 | A kind of lubricating oil reconciliation kettle of integration driving |
| CN111139118A (en) * | 2019-12-26 | 2020-05-12 | 山东源根石油化工有限公司 | Environment-friendly energy-saving hydraulic oil and preparation method thereof |
| CN112625781A (en) * | 2020-12-21 | 2021-04-09 | 山东恒利热载体工程技术有限公司 | Oil product light stabilizer |
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