CN1382780A - Lubricating grease for valve of gas pipeline - Google Patents
Lubricating grease for valve of gas pipeline Download PDFInfo
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- CN1382780A CN1382780A CN 01115610 CN01115610A CN1382780A CN 1382780 A CN1382780 A CN 1382780A CN 01115610 CN01115610 CN 01115610 CN 01115610 A CN01115610 A CN 01115610A CN 1382780 A CN1382780 A CN 1382780A
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- lubricating grease
- oil
- acid
- valve
- described lubricating
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Abstract
A lubricating grease for the valve of gas pipeline contains basic oil (50-80 wt.%), thickening agent (20-50 wt.%), filler and antioxidizing agent. The said basic oil is oxidized castor oil. The said thickening agent is a composite barium soap prepared from C16-C20 fatty acid, decanadioic acid and barium hydroxide in weight ratio of 1:0.1-2 through reaction. Its advantages are high drop point, and better adhesion and resistance to water and oil.
Description
The invention belongs to lubricant.
On Sweet natural gas and liquefied petroleum gas (LPG) transport pipe, need to install special valve usually.These valves need use supporting lubricating grease, make it that good stopping property be arranged, and play the effect of leaking of preventing.Though more multiple valve fat is arranged on the domestic market, does not satisfy above requirement mostly.On the market a kind of valve fat be with the metal lithium soap as viscosifying agent,, and add other additive and form as base oil with vegetables oil.This fat dropping point is lower, and adhesivity is relatively poor.The alternative valve grease thickener is an inorganic bentonite, and base oil is a synthetic ester lubricant, and adds binder components such as oxidation inhibitor, sanitas.Though this lubricating grease physicochemical property is better, the cost height, price is expensive, and in use caking phenomenon is arranged, not large-scale popularization.Japan has delivered in 1986 about the patent JP 6147799 of gas cock with lubricating grease, the lubricating grease that this patent proposes is that the multipolymer with poly ﹠ Alpha ,-olefin oil and iso-butylene/n-butene is a base oil, viscosifying agent is a lithium soap, and adds alkyl phenolic resin and molybdenumdisulphide composition.
The purpose of this invention is to provide a kind of lubricating grease with good water resisting property, adhesivity, oil-proofness and exclusion seal that can satisfy the valve of gas pipeline use.
The composition of valve fat provided by the invention comprises (is benchmark with lubricating grease weight): base oil 50～80%, preferred 55～70%; Viscosifying agent 20～50%, preferred 30～45%.Described base oil is a blown castor oil, and 100 ℃ of viscosity can be 30～70mm
2/ s, preferred 45～55mm
2/ s.Described viscosifying agent is by C
16～C
20The compound barium soap that lipid acid and sebacic acid and hydrated barta reaction form, the weight ratio of lipid acid and sebacic acid is 1: 0.1～2, preferred 1: 0.3～0.8.Hydrated barta is preferably suitably excessive, is acid to avoid lubricating grease.Lipid acid 12-oxystearic acid preferably wherein.
Can also contain filler in the lubricating grease provided by the invention, its content is 0～30%, preferred 10～20%.Described filler is mica powder, lime carbonate or calcium phosphate, preferably mica powder.Packing material size is generally 10～60 μ m, preferred 25～40 μ m.
Can also contain oxidation inhibitor in the lubricating grease provided by the invention, its content is 0～1%, and described oxidation inhibitor can be di-iso-octyldiphenylamine or pentanoic, preferably pentanoic.
Can also add other additive in the lubricating grease provided by the invention, as polyolefine, ceresine etc.
Lubricating grease of the present invention can be prepared as follows:
With C
16～C
20Lipid acid and sebacic acid join in the base oil in required ratio and mix, and are warmed up to 85～95 ℃, slowly add solid hydrogen barium oxide and carry out compound saponification reaction, and the reaction times is 1.5～4.0 hours.Continue to dewater when being warming up to 160～170 ℃, stop heating, add filler, be cooled to 110～130 ℃ then, add other additives such as oxidation inhibitor, carry out circulation shear, homogenizing obtains desired product.
Valve fat provided by the invention selects for use compound barium soap as viscosifying agent, and it has the fusing point height, water resisting property is strong and the characteristics of good operating stability.Base oil adopts blown castor oil, and Viscotrol C has high hydroxyl value and high functionality, can have good oil-proofness after oxide treatment.Filler is selected ultra-fine natural ore powder for use, and this filler has good sticking power, can improve the stopping property and the adhesivity of valve fat.Show that by physicochemical property evaluation lubricating grease of the present invention has high dropping point, good adhesivity, water resisting property and oil-proofness, can satisfy the service requirements of valve of gas pipeline lubricating grease.
Further specify characteristics of the present invention below by example.
Example 1
39g 12-oxystearic acid and 22g sebacic acid are added to the 182g blown castor oil, and (Beijing oil chemistry factory produces, and 100 ℃ of viscosity are 47.75mm
2/ s) in, mix, heat temperature raising to 92 ℃ adds the Ba (OH) of 57g
28H
2O carries out saponification reaction, is warming up to 165 ℃, stops heating, is cooled to room temperature, grinds three times, obtains required lubricating grease.
Example 2
27g 12-oxystearic acid and 13g sebacic acid are added to the 158g blown castor oil, and (Beijing oil chemistry factory produces, and 100 ℃ of viscosity are 59.17mm
2/ s) in, mix, heat temperature raising to 90 ℃ adds the Ba (OH) of 40g
28H
2O carries out saponification reaction, is warming up to 170 ℃, stops heating, adds the 60g filler, is cooled to 120 ℃, adds the 2g pentanoic, grinds three times, obtains required lubricating grease.
Example 3
Method by example 2 prepares 271g lubricating grease, and is raw materials used as follows: 12-oxystearic acid 40g, sebacic acid 25g, base oil 149g, Ba (OH)
28H
2O 63g, pentanoic 2g, filler 21g.
Example 4
Method by example 2 prepares 278g lubricating grease, and is raw materials used as follows: 12-oxystearic acid 33g, sebacic acid 19g, base oil 156g, Ba (OH)
28H
2O 49g, pentanoic 1g, filler 42g.
Example 5
This example is the PERFORMANCE OF GREASES test.The lubricating grease physicochemical property that example 1～4 makes sees Table 1.
Table 1
| Test subject | Example 1 | Example 2 | Example 3 | Example 4 | Test method | |
| The Drawing cone in-degree, 0.1mm | ????238 | ????256 | ????189 | ????234 | ????GB/T?269 | |
| Dropping point, ℃ | ????271 | ????268 | ????270 | ????266 | ????GB/T?3498 | |
| Corrosion (100 ℃, 24h, T 2Copper sheet) | Qualified | Qualified | Qualified | Qualified | ????GB/T?7326 | |
| Stencil oil-dividing (100 ℃, 24h), % | ????0.17 | ????0 | ????0 | ????0 | ????SH/T?0324 | |
| Water pouring number of dropouts (38 ℃, 1h), % | ????0.79 | ????1.11 | ????0.79 | ????0.11 | ????SH/T?0109 | |
| Oil-proofness | Insoluble | Insoluble | Insoluble | Insoluble | Fix tentatively 1. | |
| Chemical stability (99 ℃, 100h), KPa | ????- | ????- | ????- | ????0.029 | ????SH/T?0335 | |
| Extreme pressure property (four balls, normal temperature, 1450r/min) | ??P B，N | ????- | ????- | ????- | ????981 | ????SH/T?0202 |
| ??ZMZ，N | ????- | ????- | ????- | ????755 | ||
| Adhesivity (anti-water spray, 38 ℃, 5min), % | ????1.94 | ????1.46 | ????1.31 | ????1.13 | ????SH/T?0643 | |
1. get the finished product fat of about 1g, join in the 25mL sherwood oil, continuous stir about 2min, the dissolution degree of observation sample in sherwood oil.
Claims (9)
1. a lubricating grease that is used for valve of gas pipeline is benchmark with lubricating grease weight, and its composition comprises: base oil 50～80%, and viscosifying agent 20～50%, said base oil are blown castor oil, said viscosifying agent is C
16～C
20The compound barium soap of lipid acid and sebacic acid.
2. according to the described lubricating grease of claim 1, it is characterized in that, comprise base oil 55～70%, viscosifying agent 30～45%.
3. according to the described lubricating grease of claim 1, it is characterized in that 100 ℃ of viscosity of said blown castor oil are 30～70mm
2/ s.
4. according to the described lubricating grease of claim 3, it is characterized in that 100 ℃ of viscosity of said blown castor oil are 45～55mm
2/ s.
5. according to the described lubricating grease of claim 1, it is characterized in that the weight ratio of lipid acid and sebacic acid is 1: 0.1～2 in the said viscosifying agent.
6. according to the described lubricating grease of claim 5, it is characterized in that the weight ratio of lipid acid and sebacic acid is 1: 0.3～0.8.
7. according to the described lubricating grease of claim 1, it is characterized in that said lipid acid is the 12-oxystearic acid.
8. according to the described lubricating grease of claim 1, it is characterized in that also contain the filler that is selected from mica powder, lime carbonate and calcium phosphate in the lubricating grease of the present invention, its content is 0～30%.
9. according to the described lubricating grease of claim 1, it is characterized in that also contain the oxidation inhibitor that is selected from di-iso-octyldiphenylamine and pentanoic in the lubricating grease of the present invention, its content is 0～1%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011156104A CN1137252C (en) | 2001-04-28 | 2001-04-28 | Lubricating grease for valve of gas pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011156104A CN1137252C (en) | 2001-04-28 | 2001-04-28 | Lubricating grease for valve of gas pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1382780A true CN1382780A (en) | 2002-12-04 |
| CN1137252C CN1137252C (en) | 2004-02-04 |
Family
ID=4662099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011156104A Expired - Lifetime CN1137252C (en) | 2001-04-28 | 2001-04-28 | Lubricating grease for valve of gas pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1137252C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408941A (en) * | 2010-09-21 | 2012-04-11 | 中国石油化工股份有限公司 | Lubricating grease as well as preparation method and application thereof |
| CN102787003A (en) * | 2012-09-03 | 2012-11-21 | 通化七星润滑油制造有限责任公司 | Compound lubricating grease and preparation method of compound lubricating grease |
| CN107129857A (en) * | 2017-05-31 | 2017-09-05 | 江苏海川卓越密封材料有限公司 | Wear-resisting environment-friendly type stop-leak compound of antirust and preparation method thereof |
-
2001
- 2001-04-28 CN CNB011156104A patent/CN1137252C/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102408941A (en) * | 2010-09-21 | 2012-04-11 | 中国石油化工股份有限公司 | Lubricating grease as well as preparation method and application thereof |
| CN102787003A (en) * | 2012-09-03 | 2012-11-21 | 通化七星润滑油制造有限责任公司 | Compound lubricating grease and preparation method of compound lubricating grease |
| CN107129857A (en) * | 2017-05-31 | 2017-09-05 | 江苏海川卓越密封材料有限公司 | Wear-resisting environment-friendly type stop-leak compound of antirust and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1137252C (en) | 2004-02-04 |
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Granted publication date: 20040204 |
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