CN104155205A - Preparation method for nanoscale base material of crude oil pourpoint depressant - Google Patents
Preparation method for nanoscale base material of crude oil pourpoint depressant Download PDFInfo
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- CN104155205A CN104155205A CN201410336169.4A CN201410336169A CN104155205A CN 104155205 A CN104155205 A CN 104155205A CN 201410336169 A CN201410336169 A CN 201410336169A CN 104155205 A CN104155205 A CN 104155205A
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- crude oil
- base material
- pour point
- point depressant
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Abstract
The invention discloses a preparation method for a nanoscale base material of a crude oil pourpoint depressant and belongs to a crude oil pourpoint depressant and the technical field of the crude oil pourpoint depressant. In the method, a thermal weight loss test, a crystallization property test, an X-ray diffraction test, a powder particle size test, a water content test and a viscosity test in which a compounding agent formed by the nanoscale base material of the crude oil pourpoint depressant is added into the crude oil are adopted, wherein polar groups are grafted to the surfaces of inorganic nanoparticles; when results of the thermal weight loss test, the crystallization property test, the X-ray diffraction test, the powder particle size test and the water content test are considered to be qualified, the nanoscale base material of the crude oil pourpoint depressant is considered to be qualified. As the nanoscale base material of the crude oil pourpoint depressant is considered to be qualified by testing, the self-aggregation easily generated by the nanoscale base material of the crude oil pourpoint depressant is limited; the originally owned performance can be fully played.
Description
Technical field
The present invention relates to pour point depressant for crude oil and technical field, particularly a kind of preparation method of pour point depressant for crude oil nanoscale base material.
Background technology
Along with the pay attention to day by day of country to energy-conservation, safety, environmental protection and strategic reserve, oil gas pumped (conveying) medium ducted energy-conservation, safety flow for pipeline, operation has the more prior meaning than in the past.At present, the most wax content of crude oil that China produces is higher, mobility is poor at low temperatures, in order to solve this technical matters, the crude oil of China adopts heating to carry conventionally, this mode not only needs to expend a large amount of fuel oil and power, and after pipeline shutdown, its pipeline restart the insecurity that existence is very large.In order to address this problem, work out a kind of for high wax content oil being carried out to the pour point depressant for crude oil nanoscale base material of pour-viscosity reduction, the nano effect of nanoscale base material and its high surface and huge specific surface area are relevant, but, this pour point depressant for crude oil nanoscale base material easily produces self reunites, and makes its performance that should have be difficult to be not fully exerted.
Summary of the invention
In order addressing the above problem, a kind ofly in the preparation process of pour point depressant for crude oil nanoscale base material, it to be carried out to quality inspection and ensure that product quality reaches the preparation method of the pour point depressant for crude oil nanoscale base material of application conditions thereby the present invention proposes.
The preparation method of pour point depressant for crude oil nanoscale base material provided by the invention comprises the following steps:
Thermal weight loss test, crystal property test, X-ray diffraction test, powder size test are with, moisture test and the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined to the viscosity test in crude oil,
Wherein, describedly polar group is grafted to inorganic nano-particle sub-surface obtains, all be identified as when qualified when the test of described thermal weight loss, crystal property test, X-ray diffraction test, powder size test, moisture test and by the result that the built agent being formed by described pour point depressant for crude oil nanoscale base material joins the viscosity test in crude oil, assert that described pour point depressant for crude oil nanoscale base material is qualified.
As preferably, described crystal property test comprises melting and the crystallization curve of drawing described pour point depressant for crude oil nanoscale base material, obtain the Tc of described pour point depressant for crude oil nanoscale base material according to described melting and crystallization curve, when the scope of described Tc is during in 60 DEG C～0 DEG C, assert that the crystal property test result of described pour point depressant for crude oil nanoscale base material is qualified.
As preferably, melting and the crystallization curve of the described pour point depressant for crude oil nanoscale of described drafting base material, the Tc that obtains described pour point depressant for crude oil nanoscale base material according to described melting and crystallization curve comprises the following steps:
Step 11: described pour point depressant for crude oil nanoscale base material is put into crystal property test special copple;
Step 12: make described pour point depressant for crude oil nanoscale base material be warming up to 80 DEG C from-20 DEG C with the programming rate of 10 DEG C/min, draw the melting curve of pour point depressant for crude oil nanoscale base material according to the corresponding relation of the molten condition of described pour point depressant for crude oil nanoscale base material and temperature;
Step 13: making described pour point depressant for crude oil nanoscale base material is constant temperature 5min under the condition of 80 DEG C in temperature;
Step 14: make described pour point depressant for crude oil nanoscale base material be cooled to-20 DEG C from 80 DEG C with the cooling rate of 5 DEG C/min, draw the crystallization curve of pour point depressant for crude oil nanoscale base material according to the corresponding relation of the crystalline state of described pour point depressant for crude oil nanoscale base material and temperature;
Step 15: the Tc that obtains described pour point depressant for crude oil nanoscale base material according to described melting curve and crystallization curve.
As preferably, described X-ray diffraction test comprises the XRD curve of drawing described pour point depressant for crude oil nanoscale base material, according to 2 θ angles of 001 of pour point depressant for crude oil nanoscale base material described in described XRD tracing analysis, when the scope at 2 θ angles of 001 of described pour point depressant for crude oil nanoscale base material is during in 2～7 °, assert that the X-ray diffraction test result of described pour point depressant for crude oil nanoscale base material is qualified.
As preferably, the test condition when XRD curve of the described pour point depressant for crude oil nanoscale of described drafting base material comprises: spectral line is CuKa radiation, and tube voltage is 45kV, and tube current is 100mA, and sweep velocity is 4 °/min, and the sweep limit at 2 θ angles is 1.5 °～40 °.
As preferably, described thermal weight loss test comprises the thermogravimetric curve of drawing described pour point depressant for crude oil nanoscale base material, when obtaining the thermal weight loss scope of described pour point depressant for crude oil nanoscale base material 700 DEG C time and be 40 ± 5wt% according to described thermogravimetric curve, assert described pour point depressant for crude oil nanoscale base material thermal weight loss test passes.
As preferably, the test condition when thermogravimetric curve of the described pour point depressant for crude oil nanoscale of described drafting base material comprises: atmosphere is N
2, temperature range is 50～700 DEG C, heating rate is 20 DEG C/min.
As preferably, in the time of moisture≤5% of described pour point depressant for crude oil nanoscale base material, assert the moisture test passes of described pour point depressant for crude oil nanoscale base material.
As preferably, it is trace moisture tester that described moisture is tested the instrument of selecting.
As preferably, the described viscosity test that the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined in crude oil comprises the following steps:
Step 21: the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined in crude oil;
Step 22: the product of step 21 gained is carried out to heat treated;
Step 23: the product to step 22 gained is cooled to final cooling temperature;
Step 24: the product of testing procedure 23 gained is at 10～50s
-1viscosity under shear rate condition, when described viscosity is during lower than 200mPas, it is qualified that the built agent being formed by described pour point depressant for crude oil nanoscale base material described in assert joins viscosity test in crude oil.
The pour point depressant for crude oil nanoscale base material of preparing through the preparation method of pour point depressant for crude oil nanoscale base material provided by the invention due to through thermal weight loss test, crystal property test, X-ray diffraction test, powder size test, moisture test and the result that the built agent being formed by described pour point depressant for crude oil nanoscale base material joins the viscosity test in crude oil is all identified as qualified, limit pour point depressant for crude oil nanoscale base material and easily produced self reunion, its performance that should have can be not fully exerted.
Brief description of the drawings
The preparation method's of the pour point depressant for crude oil nanoscale base material that Fig. 1 provides for the embodiment of the present invention logic diagram;
Melting and the crystallization curve of preparation method's Crude Oil pour-point depressant nanoscale base material of the pour point depressant for crude oil nanoscale base material that Fig. 2 provides for the embodiment of the present invention;
The thermogravimetric curve of preparation method's Crude Oil pour-point depressant nanoscale base material of the pour point depressant for crude oil nanoscale base material that Fig. 3 provides for the embodiment of the present invention.
Embodiment
In order to understand the present invention in depth, below in conjunction with drawings and the specific embodiments, the present invention is described in detail.
The preparation method of pour point depressant for crude oil nanoscale base material provided by the invention comprises the following steps: thermal weight loss test, crystal property test, X-ray diffraction test, powder size test with, moisture is tested and the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined to the viscosity test in crude oil, wherein, describedly polar group is grafted to inorganic nano-particle sub-surface obtains, when described thermal weight loss test, crystal property test, X-ray diffraction test, powder size test, moisture test and the result that the built agent being formed by described pour point depressant for crude oil nanoscale base material joins the viscosity test in crude oil is all identified as when qualified, assert that described pour point depressant for crude oil nanoscale base material is qualified.
The pour point depressant for crude oil nanoscale base material of preparing through pour point depressant for crude oil nanoscale base material preparation method provided by the invention due to thermal weight loss test, crystal property test, X-ray diffraction test, powder size test, moisture test and the result that the built agent being formed by described pour point depressant for crude oil nanoscale base material joins the viscosity test in crude oil is all identified as qualified, shield substandard product, limit pour point depressant for crude oil nanoscale base material and easily produced self reunion, its performance that should have can be not fully exerted.
Wherein, described crystal property test comprises melting and the crystallization curve of drawing described pour point depressant for crude oil nanoscale base material, obtain the Tc of described pour point depressant for crude oil nanoscale base material according to described melting and crystallization curve, when the scope of described Tc is during in 60 DEG C～0 DEG C, assert that the crystal property test result of described pour point depressant for crude oil nanoscale base material is qualified.
Wherein, melting and the crystallization curve of the described pour point depressant for crude oil nanoscale of described drafting base material, referring to accompanying drawing 2, the Tc that obtains described pour point depressant for crude oil nanoscale base material according to described melting and crystallization curve comprises the following steps:
Step 11: described pour point depressant for crude oil nanoscale base material is put into crystal property test special copple;
Step 12: make described pour point depressant for crude oil nanoscale base material be warming up to 80 DEG C from-20 DEG C with the programming rate of 10 DEG C/min, draw the melting curve of pour point depressant for crude oil nanoscale base material according to the corresponding relation of the molten condition of described pour point depressant for crude oil nanoscale base material and temperature;
Step 13: making described pour point depressant for crude oil nanoscale base material is constant temperature 5min under the condition of 80 DEG C in temperature;
Step 14: make described pour point depressant for crude oil nanoscale base material be cooled to-20 DEG C from 80 DEG C with the cooling rate of 5 DEG C/min, draw the crystallization curve of pour point depressant for crude oil nanoscale base material according to the corresponding relation of the crystalline state of described pour point depressant for crude oil nanoscale base material and temperature;
Step 15: the Tc that obtains described pour point depressant for crude oil nanoscale base material according to described melting curve and crystallization curve.
Wherein, described X-ray diffraction test comprises the XRD curve of drawing described pour point depressant for crude oil nanoscale base material, for drawing according to the data of XRD curve referring to table 1,2 θ angles of 001 of pour point depressant for crude oil nanoscale base material described in described XRD tracing analysis, when the scope at 2 θ angles of 001 of described pour point depressant for crude oil nanoscale base material is during in 2～7 °, assert that the X-ray diffraction test result of described pour point depressant for crude oil nanoscale base material is qualified.
Table 1X x ray diffraction test data
Wherein, the test condition when XRD curve of the described pour point depressant for crude oil nanoscale of described drafting base material comprises: spectral line is CuKa radiation, and tube voltage is 45kV, and tube current is 100mA, and sweep velocity is 4 °/min, and the sweep limit at 2 θ angles is 1.5 °～40 °.
Wherein, described thermal weight loss test comprises the thermogravimetric curve of drawing described pour point depressant for crude oil nanoscale base material, referring to accompanying drawing 3, when obtaining the thermal weight loss scope of described pour point depressant for crude oil nanoscale base material 700 DEG C time and be 40 ± 5wt% according to described thermogravimetric curve, assert described pour point depressant for crude oil nanoscale base material thermal weight loss test passes.
Wherein, the test condition when thermogravimetric curve of the described pour point depressant for crude oil nanoscale of described drafting base material comprises: atmosphere is N
2, temperature range is 50～700 DEG C, heating rate is 20 DEG C/min.
Wherein, in the time of moisture≤5% of described pour point depressant for crude oil nanoscale base material, assert the moisture test passes of described pour point depressant for crude oil nanoscale base material.
Wherein, to test the instrument of selecting be trace moisture tester to described moisture.
Wherein, the described viscosity test that the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined in crude oil comprises the following steps:
Step 21: the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined in crude oil;
Step 22: the product of step 21 gained is carried out to heat treated;
Step 23: the product to step 22 gained is cooled to final cooling temperature;
Step 24: the product of testing procedure 23 gained is at 10～50s
-1viscosity under shear rate condition, when described viscosity is during lower than 200mPas, it is qualified that the built agent being formed by described pour point depressant for crude oil nanoscale base material described in assert joins viscosity test in crude oil, and test result is referring to table 2.
The built agent that table 2 pour point depressant for crude oil nanoscale base material forms joins the viscosity test data in crude oil
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the preparation method of a pour point depressant for crude oil nanoscale base material, it is characterized in that, comprise thermal weight loss test, crystal property test, X-ray diffraction test, powder size test with, moisture is tested and the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined to the viscosity test in crude oil, wherein, describedly polar group is grafted to inorganic nano-particle sub-surface obtains, when described thermal weight loss test, crystal property test, X-ray diffraction test, the result of powder size test and moisture test is all identified as when qualified, assert that described pour point depressant for crude oil nanoscale base material is qualified.
2. preparation method according to claim 1, it is characterized in that, described crystal property test comprises melting and the crystallization curve of drawing described pour point depressant for crude oil nanoscale base material, obtain the Tc of described pour point depressant for crude oil nanoscale base material according to described melting and crystallization curve, when the scope of described Tc is during in 60 DEG C～0 DEG C, crystallization assert that the crystal property test result of described pour point depressant for crude oil nanoscale base material is qualified.
3. preparation method according to claim 2, it is characterized in that, melting and the crystallization curve of the described pour point depressant for crude oil nanoscale of described drafting base material, the Tc that obtains described pour point depressant for crude oil nanoscale base material according to described melting and crystallization curve comprises the following steps:
Step 11: described pour point depressant for crude oil nanoscale base material is put into crystal property test special copple;
Step 12: make described pour point depressant for crude oil nanoscale base material be warming up to 80 DEG C from-20 DEG C with the programming rate of 10 DEG C/min, draw the melting curve of pour point depressant for crude oil nanoscale base material according to the corresponding relation of the molten condition of described pour point depressant for crude oil nanoscale base material and temperature;
Step 13: making described pour point depressant for crude oil nanoscale base material is constant temperature 5min under the condition of 80 DEG C in temperature;
Step 14: make described pour point depressant for crude oil nanoscale base material be cooled to-20 DEG C from 80 DEG C with the cooling rate of 5 DEG C/min, draw the crystallization curve of pour point depressant for crude oil nanoscale base material according to the corresponding relation of the crystalline state of described pour point depressant for crude oil nanoscale base material and temperature;
Step 15: the Tc that obtains described pour point depressant for crude oil nanoscale base material according to described melting curve and crystallization curve.
4. preparation method according to claim 1, it is characterized in that, described X-ray diffraction test comprises the XRD curve of drawing described pour point depressant for crude oil nanoscale base material, according to 2 θ angles of 001 of pour point depressant for crude oil nanoscale base material described in described XRD tracing analysis, when the scope at 2 θ angles of 001 of described pour point depressant for crude oil nanoscale base material is during in 2～7 °, assert that the X-ray diffraction test result of described pour point depressant for crude oil nanoscale base material is qualified.
5. preparation method according to claim 4, it is characterized in that, test condition when the XRD curve of the described pour point depressant for crude oil nanoscale of described drafting base material comprises: spectral line is CuKa radiation, tube voltage is 45kV, tube current is 100mA, sweep velocity is 4 °/min, and the sweep limit at 2 θ angles is 1.5 °～40 °.
6. preparation method according to claim 1, it is characterized in that, described thermal weight loss test comprises the thermogravimetric curve of drawing described pour point depressant for crude oil nanoscale base material, when obtaining the thermal weight loss scope of described pour point depressant for crude oil nanoscale base material 700 DEG C time and be 40 ± 5wt% according to described thermogravimetric curve, assert described pour point depressant for crude oil nanoscale base material thermal weight loss test passes.
7. preparation method according to claim 6, is characterized in that, the test condition when thermogravimetric curve of the described pour point depressant for crude oil nanoscale of described drafting base material comprises: atmosphere is N
2, temperature range is 50～700 DEG C, heating rate is 20 DEG C/min.
8. preparation method according to claim 1, is characterized in that, in the time of moisture≤5% of described pour point depressant for crude oil nanoscale base material, assert the moisture test passes of described pour point depressant for crude oil nanoscale base material.
9. preparation method according to claim 8, is characterized in that, it is trace moisture tester that described moisture is tested the instrument of selecting.
10. preparation method according to claim 1, is characterized in that, the described viscosity test that the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined in crude oil comprises the following steps:
Step 21: the built agent being formed by described pour point depressant for crude oil nanoscale base material is joined in crude oil;
Step 22: the product of step 21 gained is carried out to heat treated;
Step 23: the product to step 22 gained is cooled to final cooling temperature;
Step 24: the product of testing procedure 23 gained is at 10～50s
-1viscosity under shear rate condition, when described viscosity is during lower than 200mPas, it is qualified that the built agent being formed by described pour point depressant for crude oil nanoscale base material described in assert joins viscosity test in crude oil.
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Cited By (2)
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| CN107257918A (en) * | 2015-01-05 | 2017-10-17 | 沙特***石油公司 | Crude oil and its fraction are characterized by thermogravimetric analysis |
| CN108165245A (en) * | 2018-01-08 | 2018-06-15 | 扬州工业职业技术学院 | A kind of preparation method of silicon dioxide carried cationic alkyl glycosides type pour point depressant for crude oil |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107257918A (en) * | 2015-01-05 | 2017-10-17 | 沙特***石油公司 | Crude oil and its fraction are characterized by thermogravimetric analysis |
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| CN108165245A (en) * | 2018-01-08 | 2018-06-15 | 扬州工业职业技术学院 | A kind of preparation method of silicon dioxide carried cationic alkyl glycosides type pour point depressant for crude oil |
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Application publication date: 20141119 |