CN111378466A - Method for preparing asphalt slurry from high-softening-point petroleum asphalt particles - Google Patents
Method for preparing asphalt slurry from high-softening-point petroleum asphalt particles Download PDFInfo
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- CN111378466A CN111378466A CN202010329581.9A CN202010329581A CN111378466A CN 111378466 A CN111378466 A CN 111378466A CN 202010329581 A CN202010329581 A CN 202010329581A CN 111378466 A CN111378466 A CN 111378466A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C3/00—Working-up pitch, asphalt, bitumen
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/188—Carboxylic acids; metal salts thereof
- C10L1/1881—Carboxylic acids; metal salts thereof carboxylic group attached to an aliphatic carbon atom
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/188—Carboxylic acids; metal salts thereof
- C10L1/1886—Carboxylic acids; metal salts thereof naphthenic acid
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/30—Organic compounds compounds not mentioned before (complexes)
- C10L1/305—Organic compounds compounds not mentioned before (complexes) organo-metallic compounds (containing a metal to carbon bond)
Abstract
The invention discloses a method for preparing asphalt water slurry from high-softening-point petroleum asphalt particles in the field of energy and environmental protection, wherein an EVA emulsion, 1, 3-dioxane, polyacrylate and light oil phase are matched to form a dewaxing agent, and the dewaxing agent is fully combined with crushed high-softening-point petroleum asphalt particles to react, so that wax in the high-softening-point petroleum asphalt particles is removed, the viscosity of the asphalt water slurry is improved, the viscosity of 400-plus-material mPa 500 s is ensured, the mixing state of the asphalt water slurry is stable, the asphalt water slurry is convenient to store for a long time, no precipitate is generated after the asphalt water slurry is stored for 10 days, the treatment is not needed when the asphalt water slurry is continuously used subsequently, and the use cost is reduced.
Description
Technical Field
The invention relates to the field of energy and environmental protection, in particular to a method for preparing asphalt slurry from petroleum asphalt particles with high softening points.
Background
Petroleum asphalt is a product of crude oil processing, and is a black or dark brown viscous liquid, semisolid or solid at normal temperature, mainly containing hydrocarbon and non-hydrocarbon derivatives soluble in trichloroethylene, and its properties and composition vary with crude oil source and production method.
Asphalt is generally not chemically analyzed because the chemical composition of asphalt is complex, the composition is difficult to analyze, and the chemical composition does not reflect the difference in the properties of asphalt. Generally, from the viewpoint of use, the components of asphalt with similar chemical components and physical and mechanical properties are divided into several groups, and these groups are called "components". The components and the main physical properties of the petroleum asphalt are as follows: oil, gum, asphaltene.
By means of solvent (propane, butane and pentane) deasphalting, it is possible to produce, from vacuum residues, deasphalted oils of improved quality for use as residual lube base oils or as catalytic cracking, hydrocracking feedstocks, while obtaining high softening point deasphalted pitches, the latter processing utilization being made very difficult by their high softening point. If the high softening point asphalt is made into slurry fuel such as water emulsion or water slurry, the slurry fuel can be used as boiler fuel, raw material for gasification to produce synthetic gas and hydrogen or fuel of a water-steam combined power generation system. However, the petroleum asphalt also contains wax, which can reduce the caking property and plasticity of the petroleum asphalt, reduce the binding power of various substances in the asphalt water slurry, and is easy to precipitate after being stored for a period of time, thus being not beneficial to subsequent continuous use.
Based on the above, the invention designs a method for preparing asphalt water slurry from high-softening-point petroleum asphalt particles, which solves the problems.
Disclosure of Invention
The present invention is directed to a method for preparing an aqueous asphalt slurry from high softening point petroleum asphalt particles to solve the problems set forth in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a method for preparing asphalt slurry from high-softening-point petroleum asphalt particles comprises the following steps:
s1, placing the dried petroleum asphalt with high softening point into a crusher to be crushed, then sieving the crushed petroleum asphalt with a 400-mesh sieve to obtain petroleum asphalt particles with high softening point for later use,
s2, adding the EVA emulsion, 1, 3-dioxane, polyacrylate and light oil into a stirring tank, stirring for 35-45min, and controlling the stirring temperature at 45-55 ℃ to obtain a dewaxing agent;
s3, adding the high-softening-point petroleum asphalt particles obtained in the step S1 and the dewaxing agent of S2 into a stirring tank according to the mass ratio of 100:2.5-3.5, heating the stirring tank to 85-90 ℃, stirring for 12-15min to obtain a mixture, sending the mixture into a two-phase horizontal screw centrifuge for centrifugal separation, and separating wax to obtain a wax-free mixed solution;
s4, adding water, a dispersing agent, polyvinyl alcohol and a combustion improver into the wax-free mixed solution obtained in the step S3, and mechanically shearing and stirring at the rotation speed of 500-2000rpm for 22-28min at normal temperature to prepare asphalt water slurry;
preferably, the number of carbon atoms of the light oil is 5 or 6.
Preferably, the weight part ratio of the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil is 1-3: 2-8: 0.5-3: 86-96.5.
Preferably, the asphalt softening point of the high-softening-point petroleum asphalt is at 225 ℃ and 250 ℃.
Preferably, the dispersant is selected from one or more of petroleum sulfonate ethylhexyl phosphoric acid, sodium dodecyl sulfate, polyacrylamide, Guel gum and fatty acid polyglycol ester.
Preferably, the combustion improver is one or more of naphthenic acid, metal sulfonate and fatty acid.
Preferably, the weight part ratio of the wax-free mixed solution, water, the dispersing agent, the polyvinyl alcohol and the combustion improver is 45-60: 35-48: 0.3-0.9: 1.1-1.5: 1.5-1.9.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the dewaxing agent is formed by mutually matching the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil, the dewaxing agent is fully combined and reacted with the crushed high-softening-point petroleum asphalt particles, so that the wax in the high-softening-point petroleum asphalt particles is favorably removed, the viscosity of the asphalt water slurry is favorably improved, the viscosity of the asphalt water slurry is ensured to be 400-plus-500 mPa.s, the mixing state of the asphalt water slurry is stable, the asphalt water slurry is convenient to store for a long time, no precipitate is generated after the asphalt water slurry is stored for 10 days, the treatment is not needed when the asphalt water slurry is continuously used subsequently, and the use cost is reduced; the combustion improver is added, so that the combustion improver is beneficial to improving the combustion performance of the asphalt slurry, and meanwhile, the combustion improver selects a slurry dispersion type and a reverse auxiliary dispersant, so that the dispersion performance among various substances is improved, and the stability of the asphalt slurry is further improved; the method has the advantages of simple process, low energy consumption, easy control and suitability for large-area popularization.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a method for preparing asphalt slurry from high-softening-point petroleum asphalt particles comprises the following steps:
s1, placing the dried petroleum asphalt with high softening point into a crusher to be crushed, enabling the asphalt softening point of the petroleum asphalt with high softening point to be 225 ℃, then sieving the crushed petroleum asphalt with a 400-mesh sieve to obtain petroleum asphalt particles with high softening point for later use,
s2, adding the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil into a stirring tank, wherein the carbon atom number of the light oil is 5, and the weight part ratio of the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil is 1: 8: 3: 86, stirring for 35min, and controlling the stirring temperature at 45 ℃ to obtain a dewaxing agent;
s3, adding the high-softening-point petroleum asphalt particles obtained in the step S1 and the dewaxing agent of S2 into a stirring tank according to the mass ratio of 100:2.5, heating the stirring tank to 90 ℃, stirring for 15min to obtain a mixture, conveying the mixture into a two-phase horizontal screw centrifuge for centrifugal separation, and separating wax to obtain a wax-free mixed solution;
s4, adding water, a dispersing agent, polyvinyl alcohol and a combustion improver into the wax-free mixed solution obtained in the step S3, wherein the weight ratio of the wax-free mixed solution to the water to the dispersing agent to the polyvinyl alcohol to the combustion improver is 45: 35: 0.9: 1.1: 1.9, mechanically shearing and stirring at the rotating speed of 500rpm for 28min at normal temperature to prepare asphalt slurry;
the dispersant is selected from petroleum sulfonate ethylhexyl phosphoric acid.
The combustion improver adopts naphthenic acid.
The viscosity of the asphalt water slurry at 30 ℃ is 415mPa.s, and the asphalt water slurry has good fluidity. The water slurry has good storage stability, and no precipitate after being placed at room temperature for 10 days.
Example 2:
a method for preparing asphalt slurry from high-softening-point petroleum asphalt particles comprises the following steps:
s1, placing the dried petroleum asphalt with high softening point into a crusher to be crushed, enabling the asphalt softening point of the petroleum asphalt with high softening point to be 235 ℃, then sieving the crushed petroleum asphalt with a 400-mesh sieve to obtain petroleum asphalt particles with high softening point for later use,
s2, adding the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil into a stirring tank, wherein the carbon atom number of the light oil is 6, and the weight part ratio of the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil is 2: 6: 0.5: 96.5, stirring for 38min, and controlling the stirring temperature at 55 ℃ to obtain a dewaxing agent;
s3, adding the high-softening-point petroleum asphalt particles obtained in the step S1 and the dewaxing agent of S2 into a stirring tank according to the mass ratio of 100:3.5, heating the stirring tank to 85 ℃, stirring for 13min to obtain a mixture, conveying the mixture into a two-phase horizontal screw centrifuge for centrifugal separation, and separating wax to obtain a wax-free mixed solution;
s4, adding water, a dispersing agent, polyvinyl alcohol and a combustion improver into the wax-free mixed solution obtained in the step S3, wherein the weight ratio of the wax-free mixed solution to the water to the dispersing agent to the polyvinyl alcohol to the combustion improver is 60: 48: 0.7: 1.5: 1.5-1.9, mechanically shearing and stirring at the rotation speed of 1500rpm for 26min at normal temperature to prepare asphalt slurry;
the dispersant is selected from the group consisting of petroleum sulfonate ethylhexyl phosphoric acid, sodium lauryl sulfate, and polyacrylamide.
The combustion improver is selected from naphthenic acid, metal sulfonate and fatty acid.
The viscosity of the asphalt water slurry at 30 ℃ is 483mPa.s, and the asphalt water slurry has good fluidity. The water slurry has good storage stability, and no precipitate after being placed at room temperature for 10 days.
Example 3:
a method for preparing asphalt slurry from high-softening-point petroleum asphalt particles comprises the following steps:
s1, placing the dried petroleum asphalt with high softening point into a crusher to be crushed, enabling the asphalt softening point of the petroleum asphalt with high softening point to be 245 ℃, then sieving the crushed petroleum asphalt with a 400-mesh sieve to obtain petroleum asphalt particles with high softening point for later use,
s2, adding the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil into a stirring tank, wherein the carbon atom number of the light oil is 5, and the weight part ratio of the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil is 3: 4: 0.9: 91.5, stirring for 42min, and controlling the stirring temperature at 48 ℃ to obtain the dewaxing agent;
s3, adding the high-softening-point petroleum asphalt particles obtained in the step S1 and the dewaxing agent of S2 into a stirring tank according to the mass ratio of 100:2.8, heating the stirring tank to 86 ℃, stirring for 14min to obtain a mixture, conveying the mixture into a two-phase horizontal screw centrifuge for centrifugal separation, and separating wax to obtain a wax-free mixed solution;
s4, adding water, a dispersing agent, polyvinyl alcohol and a combustion improver into the wax-free mixed solution obtained in the step S3, wherein the weight ratio of the wax-free mixed solution to the water to the dispersing agent to the polyvinyl alcohol to the combustion improver is 58: 39: 0.5: 1.2: 1.8, mechanically shearing and stirring at the rotation speed of 1200rpm for 22min at normal temperature to prepare asphalt slurry;
the dispersant is selected from petroleum sulfonate ethylhexyl phosphoric acid, sodium dodecyl sulfate, polyacrylamide, guar gum and fatty acid polyglycol ester.
The combustion improver is naphthenic acid and metal sulfonate.
The viscosity of the asphalt water slurry at 30 ℃ is 469mPa.s, and the asphalt water slurry has good fluidity. The water slurry has good storage stability, and no precipitate after being placed at room temperature for 10 days.
Example 4:
a method for preparing asphalt slurry from high-softening-point petroleum asphalt particles comprises the following steps:
s1, placing the dried petroleum asphalt with high softening point into a crusher to be crushed, enabling the asphalt softening point of the petroleum asphalt with high softening point to be 250 ℃, then sieving the crushed petroleum asphalt with a 400-mesh sieve to obtain petroleum asphalt particles with high softening point for later use,
s2, adding the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil into a stirring tank, wherein the carbon atom number of the light oil is 6, and the weight part ratio of the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil is 2: 5: 2.1: 87, stirring for 45min, and controlling the stirring temperature at 52 ℃ to obtain a dewaxing agent;
s3, adding the high-softening-point petroleum asphalt particles obtained in the step S1 and the dewaxing agent of S2 into a stirring tank according to the mass ratio of 100:3.1, heating the stirring tank to 87 ℃, stirring for 12min to obtain a mixture, conveying the mixture into a two-phase horizontal screw centrifuge for centrifugal separation, and separating wax to obtain a wax-free mixed solution;
s4, adding water, a dispersing agent, polyvinyl alcohol and a combustion improver into the wax-free mixed solution obtained in the step S3, wherein the weight ratio of the wax-free mixed solution to the water to the dispersing agent to the polyvinyl alcohol to the combustion improver is 52: 42: 0.3: 1.3: 1.7, mechanically shearing and stirring at the rotating speed of 2000rpm for 25min at normal temperature to prepare asphalt slurry;
the dispersant is selected from fatty acid polyglycol ester.
The combustion improver is fatty acid.
The viscosity of the asphalt water slurry at 30 ℃ is 428mPa.s, and the asphalt water slurry has good fluidity. The water slurry has good storage stability, and no precipitate after being placed at room temperature for 10 days.
Example 5:
a method for preparing asphalt slurry from high-softening-point petroleum asphalt particles comprises the following steps:
s1, placing the dried petroleum asphalt with high softening point into a crusher to be crushed, wherein the asphalt softening point of the petroleum asphalt with high softening point is 240 ℃, then sieving with a 400-mesh sieve to obtain petroleum asphalt particles with high softening point for later use,
s2, adding the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil into a stirring tank, wherein the carbon atom number of the light oil is 5, and the weight part ratio of the EVA emulsion, the 1, 3-dioxane, the polyacrylate and the light oil is 3: 2: 1.6: 89, stirring for 39min, and controlling the stirring temperature at 53 ℃ to obtain a dewaxing agent;
s3, adding the high-softening-point petroleum asphalt particles obtained in the step S1 and the dewaxing agent of S2 into a stirring tank according to the mass ratio of 100:3.4, heating the stirring tank to 88 ℃, stirring for 13min to obtain a mixture, conveying the mixture into a two-phase horizontal screw centrifuge for centrifugal separation, and separating wax to obtain a wax-free mixed solution;
s4, adding water, a dispersing agent, polyvinyl alcohol and a combustion improver into the wax-free mixed solution obtained in the step S3, wherein the weight ratio of the wax-free mixed solution to the water to the dispersing agent to the polyvinyl alcohol to the combustion improver is 49: 45: 0.7: 1.4: 1.6, mechanically shearing and stirring at the normal temperature and the rotating speed of 1600rpm for 24min to prepare asphalt slurry;
the dispersant is selected from guar gum and fatty acid polyglycol ester.
The combustion improver is metal sulfonate.
The viscosity of the asphalt water slurry at 30 ℃ is 455mPa.s, and the asphalt water slurry has good fluidity. The water slurry has good storage stability, and no precipitate after being placed at room temperature for 10 days.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.
Claims (7)
1. A method for preparing asphalt slurry from high-softening-point petroleum asphalt particles is characterized by comprising the following steps: the method comprises the following steps:
s1, placing the dried petroleum asphalt with high softening point into a crusher to be crushed, then sieving the crushed petroleum asphalt with a 400-mesh sieve to obtain petroleum asphalt particles with high softening point for later use,
s2, adding the EVA emulsion, 1, 3-dioxane, polyacrylate and light oil into a stirring tank, stirring for 35-45min, and controlling the stirring temperature at 45-55 ℃ to obtain a dewaxing agent;
s3, adding the high-softening-point petroleum asphalt particles obtained in the step S1 and the dewaxing agent of S2 into a stirring tank according to the mass ratio of 100:2.5-3.5, heating the stirring tank to 85-90 ℃, stirring for 12-15min to obtain a mixture, sending the mixture into a two-phase horizontal screw centrifuge for centrifugal separation, and separating wax to obtain a wax-free mixed solution;
s4, adding water, a dispersing agent, polyvinyl alcohol and a combustion improver into the wax-free mixed solution obtained in the step S3, and mechanically shearing and stirring at the rotation speed of 500-2000rpm for 22-28min at normal temperature to prepare asphalt water slurry.
2. The method of claim 1 for preparing an aqueous slurry of asphalt from high softening point petroleum asphalt particles, wherein: the number of carbon atoms of the light oil is 5 or 6.
3. The method of claim 2 for preparing an aqueous slurry of asphalt from high softening point petroleum asphalt particles, wherein: the weight ratio of the EVA emulsion to the 1, 3-dioxane to the polyacrylate to the light oil is 1-3: 2-8: 0.5-3: 86-96.5.
4. The method of claim 1 for preparing an aqueous slurry of asphalt from high softening point petroleum asphalt particles, wherein: the asphalt softening point of the high-softening-point petroleum asphalt is 225-250 ℃.
5. The method of claim 1 for preparing an aqueous slurry of asphalt from high softening point petroleum asphalt particles, wherein: the dispersant is selected from one or more of petroleum sulfonate ethylhexyl phosphoric acid, sodium dodecyl sulfate, polyacrylamide, Guler gum and fatty acid polyglycol ester.
6. The method of claim 1 for preparing an aqueous slurry of asphalt from high softening point petroleum asphalt particles, wherein: the combustion improver is one or more of naphthenic acid, metal sulfonate and fatty acid.
7. The method of claim 1 for preparing an aqueous slurry of asphalt from high softening point petroleum asphalt particles, wherein: the weight ratio of the wax-free mixed solution to the water to the dispersing agent to the polyvinyl alcohol to the combustion improver is 45-60: 35-48: 0.3-0.9: 1.1-1.5: 1.5-1.9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0160754B1 (en) * | 1982-09-29 | 1987-08-19 | Exxon Research And Engineering Company | Solvent dewaxing of waxy hydrocarbon distillates |
| CN1050737A (en) * | 1989-10-06 | 1991-04-17 | 罗姆有限公司化学工厂 | The process for dewaxing of waxy oil product |
| US6001886A (en) * | 1996-04-01 | 1999-12-14 | Texaco Inc. | Process for stable aqueous asphalt emulsions |
| CN1865407A (en) * | 2005-05-16 | 2006-11-22 | 中国石油化工股份有限公司 | Improved solvent-dewaxing method |
| CN102382696A (en) * | 2011-09-21 | 2012-03-21 | 中国石油天然气股份有限公司 | Method for preparing aqueous asphalt slurry from high-softening-point petroleum asphalt grains |
-
2020
- 2020-04-22 CN CN202010329581.9A patent/CN111378466A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0160754B1 (en) * | 1982-09-29 | 1987-08-19 | Exxon Research And Engineering Company | Solvent dewaxing of waxy hydrocarbon distillates |
| CN1050737A (en) * | 1989-10-06 | 1991-04-17 | 罗姆有限公司化学工厂 | The process for dewaxing of waxy oil product |
| US6001886A (en) * | 1996-04-01 | 1999-12-14 | Texaco Inc. | Process for stable aqueous asphalt emulsions |
| CN1865407A (en) * | 2005-05-16 | 2006-11-22 | 中国石油化工股份有限公司 | Improved solvent-dewaxing method |
| CN102382696A (en) * | 2011-09-21 | 2012-03-21 | 中国石油天然气股份有限公司 | Method for preparing aqueous asphalt slurry from high-softening-point petroleum asphalt grains |
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