CN114479796A - Low-cost vegetable oil gel system and preparation method thereof - Google Patents
Low-cost vegetable oil gel system and preparation method thereof Download PDFInfo
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- 235000015112 vegetable and seed oil Nutrition 0.000 title claims abstract description 67
- 239000008158 vegetable oil Substances 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 70
- 150000001875 compounds Chemical class 0.000 claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000000654 additive Substances 0.000 claims abstract description 23
- 239000007787 solid Substances 0.000 claims abstract description 23
- 238000004945 emulsification Methods 0.000 claims abstract description 4
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 25
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 25
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 24
- 230000000996 additive effect Effects 0.000 claims description 22
- 235000012343 cottonseed oil Nutrition 0.000 claims description 18
- 239000002385 cottonseed oil Substances 0.000 claims description 18
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 8
- 238000005303 weighing Methods 0.000 claims description 8
- 239000011858 nanopowder Substances 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 235000019484 Rapeseed oil Nutrition 0.000 claims description 3
- 235000021388 linseed oil Nutrition 0.000 claims description 3
- 239000000944 linseed oil Substances 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims 1
- 235000011803 sesame oil Nutrition 0.000 claims 1
- 239000008159 sesame oil Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 13
- 239000002994 raw material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000499 gel Substances 0.000 description 65
- 230000000052 comparative effect Effects 0.000 description 22
- 239000003921 oil Substances 0.000 description 14
- 235000019198 oils Nutrition 0.000 description 14
- 230000018044 dehydration Effects 0.000 description 11
- 238000006297 dehydration reaction Methods 0.000 description 11
- HVUMOYIDDBPOLL-XGKPLOKHSA-N [2-[(2r,3r,4s)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XGKPLOKHSA-N 0.000 description 7
- 241000196324 Embryophyta Species 0.000 description 6
- 230000032683 aging Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 239000000839 emulsion Substances 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 3
- 230000001804 emulsifying effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000010382 chemical cross-linking Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229920006158 high molecular weight polymer Polymers 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/516—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls characterised by their form or by the form of their components, e.g. encapsulated material
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/5045—Compositions based on water or polar solvents containing inorganic compounds
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
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Abstract
The invention relates to a low-cost vegetable oil gel system and a preparation method thereof, belonging to the technical field of oilfield plugging agents, wherein the system comprises the following components in percentage by mass: 11.5-34 wt% of vegetable oil, 60-82 wt% of water and 6-6.5 wt% of compound emulsifier; the HLB value of the compound emulsifier is 5.0-6.0; solid additives may also be included at 1 wt%. Compared with the existing gel system prepared by adopting vegetable oil, the vegetable oil gel system has the advantages of good emulsification effect, higher viscosity which can reach more than 70000mPa & s, good stability and good water plugging performance. Compared with other plugging agents in the prior art, the plugging agent has the advantages of simple components, wide raw material sources, low cost and the like. The invention also discloses a preparation method of the gel system, the preparation process is simple and easy to operate, and the obtained gel system has stable performance.
Description
Technical Field
The invention relates to the technical field of oilfield plugging agents, in particular to a low-cost vegetable oil gel system and a preparation method thereof.
Background
Waterflooding development is still one of the means commonly used in oil recovery in oil fields at present. After water is injected into a stratum, water flows cross along a high-permeability zone due to the heterogeneity of the stratum and the damage of long-term water drive to the stratum, so that the sweep coefficient of the water is reduced, an oil reservoir cannot be driven, even the injected water forms a short circuit, and great challenges are brought to the oil field production and oil stabilization. The common method is to inject the formed water-blocking profile control agent or the chemical agent which can generate the blocking agent through chemical cross-linking reaction into the underground reservoir to block the high permeability zone and force the injected water to flow into the low permeability zone, thereby achieving the purposes of diverting the liquid flow and improving the water flooding wave and volume and the oil recovery rate.
At present, the water plugging profile control agent comprises a plurality of weak gels, particles, foams, microorganisms, oily sludge, inorganic gel coatings and the like. Among them, the weak gel type plugging agent is one of the most effective chemical methods for improving oil recovery.
The long-term water drive development of oil fields makes the oil layer characteristics and the environment become increasingly complex, and higher requirements are put forward for deep water plugging profile control technology. The problem of high water content of special oil fields such as high-temperature, high-salinity and fracture-cavity oil reservoirs is increasingly prominent. The deep flow problem of thick sandstone oil layers cannot be effectively solved by the conventional deep profile control and water shutoff operation. Meanwhile, with the enhancement of environmental awareness and cost consideration, a novel low-cost environment-friendly water shutoff profile control technology is urgently needed in oil fields. The traditional polyacrylamide high molecular weight polymer and modified derivatives thereof can not adapt to increasingly harsh formation conditions, and the development of a novel water shutoff profile control system is imminent. In addition, in the existing gel system using vegetable oil as a raw material, the emulsifying effect is poor after the emulsifier reacts with water, even if a high-viscosity substance can be formed, the high-viscosity substance can be quickly layered, the viscosity is reduced, the relatively high viscosity cannot be kept all the time, and the high-viscosity system cannot be formed; in addition, the emulsifier has no temperature resistance and salt tolerance, and the high viscosity stability of the existing gel system is also limited.
Disclosure of Invention
The invention provides a low-cost vegetable oil gel system, aiming at solving the technical problems that the existing polymer and modified derivative thereof are high in cost and not environment-friendly, and the existing vegetable oil prepared gel system is low in viscosity, poor in stability and the like. Meanwhile, the invention also provides a preparation method of the vegetable oil gel system with low cost.
The technical scheme of the invention is as follows:
a low-cost vegetable oil gel system is a vegetable oil emulsification system and comprises the following components in percentage by mass: 11.5-34 wt% of vegetable oil, 60-82 wt% of water and 6-6.5 wt% of compound emulsifier; the compound emulsifier comprises sodium dodecyl benzene sulfonate and span60 or span80, and the HLB value of the compound emulsifier is 5.0-6.0.
Preferably, the vegetable oil is one or more of rapeseed oil, linseed oil and cottonseed oil. More preferably, the vegetable oil is cottonseed oil.
Preferably, the mass ratio of the sodium dodecyl benzene sulfonate to the span60 or the span80 is 10:1-1: 1.
Preferably, the low-cost vegetable oil gel system consists of the following components: vegetable oil, water, a compound emulsifier and a solid additive; the compound emulsifier comprises sodium dodecyl benzene sulfonate and span60 or span80, and the HLB value of the compound emulsifier is 5.0-6.0; the solid additive is any one of silicon dioxide powder, hydrophilic nano powder or hydrophobic nano powder. More preferably, the ratio of each component is as follows: 13 wt% of cottonseed oil, 80 wt% of water, 6 wt% of compound emulsifier and 1 wt% of solid additive.
A method for preparing a low-cost vegetable oil gel system comprises the following steps:
s1) weighing sodium dodecyl benzene sulfonate and span80 or span60 according to the formula, and uniformly mixing to obtain a compound emulsifier for later use;
s2) weighing the vegetable oil and other components according to the formula, then sequentially adding the other components into the vegetable oil, and stirring at the stirring speed of 1000-2000 r/min for at least 30 min;
s3), and standing to obtain an emulsified gel system.
The invention has the beneficial technical effects that:
the invention provides a low-cost vegetable oil gel system, which adopts vegetable oil as a thick oil raw material, adopts a compound emulsifier mixed with water to emulsify the vegetable oil to obtain the gel system, and forms a reasonable proportion formula by adjusting the proportion of the emulsifier and the water content, so that the gel system comprises the following components: 11.5-34 wt% of vegetable oil, 60-82 wt% of water and 6-6.5 wt% of compound emulsifier; the compound emulsifier comprises sodium dodecyl benzene sulfonate and span60 or span80, and the HLB value of the compound emulsifier is 5.0-6.0. After the water reacts with the emulsifier, the emulsifying property is good, the emulsifying agent has excellent emulsifying effect on the vegetable oil, the viscosity of a gel system formed by the vegetable oil is ensured to reach 70000mPa & s under the conditions of high temperature and high salt, no obvious layering phenomenon exists after standing, the system stability is good, and the problems of low viscosity and poor stability of the gel system formed by the conventional vegetable oil are solved. Meanwhile, the low-cost vegetable oil gel system is used as an oilfield water shutoff profile control agent, is simple in components, wide in raw material source and low in cost, and solves the technical problems of high cost and environmental pollution of the existing polymer and modified derivative plugging agent thereof.
Preferably, a solid additive is further added as a propping agent, so that the propping agent has the function of propping agent, can stably exist in the vegetable oil gel and uniformly disperse, the bonding strength of the system in the high-temperature and high-salt environment of the stratum is increased, a high-strength plugging object is formed after gelling, the plugging strength of the system (rigid plugging) can be effectively improved, and the blocking of the roar or the crack is facilitated. And the vegetable oil gel system mixed with the solid additive is aged for 30 days under the conditions of high temperature and high salt (110 ℃ and 22 ten thousand of mineralization degrees), so that obvious viscosity reduction does not occur, an emulsification system is not damaged, and stable emulsion can still be formed. The blocking strength of the emulsion is also significantly increased compared to when no solid additive is added.
The invention also provides a preparation method of the two low-cost plant gel systems, the preparation methods are simple and quick, and the prepared gel system has good stability.
Preferably, the vegetable oil is one or more of rapeseed oil, linseed oil and cottonseed oil. More preferably, the vegetable oil is cotton seed oil, the mass ratio of the sodium dodecyl benzene sulfonate to the span60 or 80 is 10:1-1:1, the formed gel system is higher in viscosity, and the system is more stable.
Drawings
FIG. 1 is a graph showing the variation of the viscosity of a gel system with respect to the content of an emulsifier;
FIG. 2 is a graph showing the change of viscosity and water content of a gel system;
FIG. 3 is a graph of the viscosity change of a gel system without the addition of a solid additive and with the addition of a different solid additive before and after aging;
FIG. 4 is a graph showing the change of dehydration rate of different gel systems with time at 25 ℃;
FIG. 5 shows the change of dehydration rate of different gel systems with time at 60 ℃.
Detailed Description
For a more complete understanding of the present application, reference is now made to figures 1-5 and the detailed description of the embodiments.
Example 1
The low-cost plant gel system provided by the embodiment comprises the following components in percentage by mass: 33.5 wt% of cottonseed oil, 60 wt% of water and 6.5 wt% of compound emulsifier; the HLB value of the compound emulsifier is 6.0, and the compound emulsifier is sodium dodecyl benzene sulfonate and Span80 in a mass ratio of 10:1, or the sodium dodecyl benzene sulfonate and Span60 in a mass ratio of 10: 1.
The preparation method comprises the following steps:
s1) weighing sodium dodecyl benzene sulfonate and Span80 or Span60 according to the formula, and uniformly mixing to obtain a compound emulsifier for later use;
s2) weighing vegetable oil and water according to the formula, then sequentially adding the water and the compound emulsifier into the vegetable oil, and stirring at the stirring speed of 1000-2000 r/min for 30 min;
s3), and standing to obtain an emulsified gel system.
Example 2
The low-cost plant gel system provided by the embodiment comprises the following components in percentage by mass: 14 wt% of cottonseed oil, 80 wt% of water and 6 wt% of compound emulsifier; the HLB value of the compound emulsifier is 5.0, and the compound emulsifier is sodium dodecyl benzene sulfonate and Span80 or Span60 in a mass ratio of 1: 1.
The preparation method is basically the same as that of example 1, and therefore, detailed description is omitted.
Example 3
The low-cost plant gel system provided by the embodiment comprises the following components in parts by mass, 13 wt% of cottonseed oil, 80 wt% of water, 6 wt% of compound emulsifier and 1 wt% of solid additive; the HLB value of the compound emulsifier is 5.5; the compound emulsifier is sodium dodecyl benzene sulfonate and Span80 or Span60 in a mass ratio of 3: 1; the solid additive is nano silicon dioxide powder.
The preparation method comprises the following steps:
s1) weighing sodium dodecyl benzene sulfonate and Span80 or Span60 according to the formula, and uniformly mixing to obtain a compound emulsifier for later use;
s2) weighing vegetable oil, water and a solid additive according to a formula, then sequentially adding the water, the solid additive and a compound emulsifier into the vegetable oil, and stirring at the stirring speed of 1000-2000 r/min for at least 30 min;
s3), and standing to obtain an emulsified gel system.
Example 4
The low-cost plant gel system provided by the embodiment comprises the following components in parts by mass, 33 wt% of cottonseed oil, 60 wt% of water, 6 wt% of compound emulsifier and 1 wt% of solid additive; the HLB value of the compound emulsifier is 5.7; the compound emulsifier is sodium dodecyl benzene sulfonate and Span80 or Span60 in a mass ratio of 7: 1; the solid additive is silicon dioxide powder, hydrophilic nanometer powder or hydrophobic nanometer powder.
Example 5
The low-cost plant gel system provided by the embodiment comprises the following components in percentage by mass: 34 wt% of cottonseed oil, 60 wt% of water and 6 wt% of compound emulsifier; the compound emulsifier is sodium dodecyl benzene sulfonate and Span80 or Span60 in a mass ratio of 1:1, and the HLB value of the compound emulsifier is 5.0.
Comparative example:
comparative example 1:
comparative sample 1 consists of the following components in mass fraction: 18 wt% of vegetable oil, 80 wt% of water and 2 wt% of compound emulsifier; the HLB value of the compound emulsifier is 6.0, and the compound emulsifier is sodium dodecyl benzene sulfonate and Span80 in a mass ratio of 10: 1.
For comparative samples 2-6, 17 wt% of vegetable oil +3 wt% of a compound emulsifier, 16 wt% of vegetable oil +4 wt% of a compound emulsifier, 15 wt% of vegetable oil +5 wt% of a compound emulsifier, 15 wt% of vegetable oil +7 wt% of a compound emulsifier, 17 wt% of vegetable oil +9 wt% of a compound emulsifier, and the other components were unchanged. The vegetable oil in comparative samples 1-6 was cottonseed oil, and the composition is shown in table 1.
Comparative example 2:
the comparative sample 7 is composed of the following components in mass fraction: 74 wt% of vegetable oil, 20 wt% of water and 6 wt% of compound emulsifier; the HLB value of the compound emulsifier is 6.0, and the compound emulsifier is sodium dodecyl benzene sulfonate and Span80 in a mass ratio of 10: 1.
For comparative samples 8-12, 64 wt% vegetable oil +30 wt% water, 54 wt% vegetable oil +40 wt% water, 44 wt% vegetable oil +50 wt% water, 34 wt% vegetable oil +60 wt% water, 24 wt% vegetable oil +70 wt% water, respectively, were used, and the other components were unchanged. The vegetable oil in comparative samples 7-12 was cottonseed oil, and the composition is shown in table 1.
Comparative example 3:
comparative sample 13 was prepared using 54 wt% cottonseed oil, 40 wt% water, and 6 wt% compounded emulsifier Span80 with an HLB value of 4.3; comparative sample 14 was prepared using 34 wt% cottonseed oil, 60 wt% water, and 6 wt% compounded emulsifier 15:1 sodium dodecylbenzenesulfonate and Span80, with an HLB value of 9.5; comparative sample 15, which used 14 wt% cottonseed oil, 80 wt% water, and 6 wt% formulated emulsifier, was sodium dodecylbenzenesulfonate and Span80 in a 1:5 mass ratio with an HLB value of 4.5, and the composition is shown in table 1.
And (3) performance comparison:
by detecting the viscosities of the comparative samples 1-6 and the example 3, as shown in fig. 1, the viscosity of the gel system increases with the increase of the content of the compound emulsifier, but when the content of the compound emulsifier reaches 7%, the gel system forms an ultra-high viscosity state, loses fluidity, and loses usability as a plugging agent. Therefore, the addition amount of the compound emulsifier is best when 6 percent.
By detecting the viscosities of the comparative samples 7-12 and the example 3, as shown in fig. 2, the viscosity of the gel system increases with the increase of the water content, and particularly, the gel viscosity can reach 70000mPa · s at a water content of 80%; when the water content reaches 90%, the formed gel system is layered after standing, and a stable gel system cannot be formed, so that the performance of the gel system with the water content of 60-80% is relatively good.
The results of the measurements of the viscosity change before and after aging of the gel systems of examples 1 and 4 are shown in FIG. 3. Wherein the aging condition is aging at 110 deg.C for 30 d. As shown in fig. 3, the viscosity of the gel system without the solid additive is lower than the gel system with the solid additive; however, the viscosity of the gel system without the solid additive is not reduced but increased after aging, which shows that the gel system has good temperature resistance, and the viscosity is not reduced and increased reversely under the high-temperature condition. The viscosity of the gel system added with the solid additive is reduced to some extent, but the reduction range is not large, the stability of the gel system is not damaged, and a stable emulsion can still be formed, so that the gel system has good temperature resistance. Meanwhile, as shown in fig. 3, the gel system added with the hydrophobic nano powder solid additive has higher viscosity, less viscosity reduction after aging, more stable emulsion and better temperature resistance under high temperature.
TABLE 1 composition of different gel systems
The present document also examined the dehydration performance of the gel systems prepared according to the present invention, which were obtained by using the gel systems prepared in comparative sample 9, comparative samples 13 to 15, examples 2 and examples 5, and determining the change of the dehydration rate with time at 25 ℃ and 60 ℃ respectively. As shown in FIG. 4, under the condition of 25 ℃, the dehydration rate of the sodium dodecyl benzene sulfonate with the water content of 80 percent and the built emulsifier of 1:1 in example 2 and the gel system of Span80 after 200 hours is basically 0, and the excellent stability is shown; in example 5, the dehydration rate of a gel system of sodium dodecyl benzene sulfonate with the water content of 60% and the compound emulsifier of 1:1 and Span80 after 200 hours is about 8%, and the gel system also shows good stability; in contrast, in the sample 9, the dehydration rate of the gel system of sodium dodecyl benzene sulfonate with 40% of water content and 10:1 of compound emulsifier and Span80 is up to 20% after 200 hours, and the stability is poor; also, the gel systems of comparative samples 14 and 15, although having a suitable water content, are extremely unstable because the emulsifier is not compounded or the ratio is not in the preferred range and the dehydration rate after 200 hours is as high as 70% or more; the comparative sample 13 contains water and an emulsifier which are both not suitable, the dehydration rate after 200 hours is up to more than 80%, and the system is extremely unstable. As shown in fig. 5, although the gel systems of examples 2 and 5 have a certain dehydration rate at 60 ℃ with increasing temperature, the gel systems have a lower dehydration rate and still show good stability; the comparative sample 9 and the comparative samples 13 to 15 were poor in stability.
In summary, compared with the vegetable oil gel systems of comparative examples 1-3 and examples 1-5, the viscosity of the gel system formed by the vegetable oil is ensured to reach 70000mPa & s under the high-temperature and high-salt conditions due to the setting of the composition and the content, and the system has good stability without obvious layering phenomenon after standing.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A low-cost vegetable oil gel system is characterized by being a vegetable oil emulsification system and comprising the following components in percentage by mass: 11.5-34 wt% of vegetable oil, 60-82 wt% of water and 6-6.5 wt% of compound emulsifier; the compound emulsifier comprises sodium dodecyl benzene sulfonate and span60 or span80, and the HLB value of the compound emulsifier is 5.0-6.0.
2. A low cost vegetable oil gel system according to claim 1 wherein said vegetable oil is one or more of rapeseed oil, sesame oil, linseed oil and cottonseed oil.
3. A low cost vegetable oil gel system according to claim 2 wherein said vegetable oil is cottonseed oil.
4. The low cost vegetable oil gel system of claim 1, wherein the mass ratio of sodium dodecylbenzene sulfonate to span60 or span80 is 10:1-1: 1.
5. A low cost vegetable oil gel system according to claim 1, characterized by consisting of: vegetable oil, water, a compound emulsifier and a solid additive; the compound emulsifier comprises sodium dodecyl benzene sulfonate and span60 or span80, and the HLB value of the compound emulsifier is 5.0-6.0; the solid additive is any one of silicon dioxide powder, hydrophilic nano powder or hydrophobic nano powder.
6. A low cost vegetable oil gel system according to claim 5 wherein the proportions of ingredients are as follows: 13 wt% of cottonseed oil, 80 wt% of water, 6 wt% of compound emulsifier and 1 wt% of solid additive.
7. A method of preparing a low cost vegetable oil gel system as claimed in any one of claims 1 to 6, characterised in that it comprises the steps of:
s1) weighing sodium dodecyl benzene sulfonate and span80 or span60 according to the formula, and uniformly mixing to obtain a compound emulsifier for later use;
s2) weighing the vegetable oil and the water according to the formula, then sequentially adding the water and the compound emulsifier into the vegetable oil, and stirring at the stirring speed of 1000-2000 r/min for at least 30 min;
s3), and standing to obtain an emulsified gel system.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102295966A (en) * | 2011-07-25 | 2011-12-28 | 青岛福瑞斯生物能源科技开发有限公司 | Micro-emulsified biodiesel and preparation method thereof |
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