CN112552952A - Crude oil decalcifying agent and preparation method and application thereof - Google Patents
Crude oil decalcifying agent and preparation method and application thereof Download PDFInfo
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- CN112552952A CN112552952A CN202011419033.1A CN202011419033A CN112552952A CN 112552952 A CN112552952 A CN 112552952A CN 202011419033 A CN202011419033 A CN 202011419033A CN 112552952 A CN112552952 A CN 112552952A
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G29/00—Refining of hydrocarbon oils, in the absence of hydrogen, with other chemicals
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Abstract
The invention relates to a crude oil decalcifying agent, which comprises, by mass, 20-80 parts of a decalcifying main agent, 0.3-1 part of a corrosion inhibitor and 0.3-1 part of a scale inhibitor; the mass ratio of the corrosion inhibitor to the scale inhibitor is (0.5-2): 1. the corrosion inhibitor is organic amine; the scale inhibitor is selected from one or more of polyaspartic acid, polysuccinimide and hydrolyzed polymaleic anhydride. The crude oil decalcifying agent can effectively remove calcium ions contained in crude oil by selecting specific types and contents of corrosion inhibitor and scale inhibitor and controlling the proportion of the corrosion inhibitor and the scale inhibitor, and the corrosion inhibitor and the scale inhibitor have combined action with a main decalcifying agent with specific content. The decalcification main agent, the corrosion inhibitor and the scale inhibitor of the crude oil decalcification agent have synergistic effect, can improve the solubility of calcium salt in water, has good decalcification effect and high decalcification efficiency, and can effectively prevent the blockage of equipment pipelines caused by the precipitation and scaling of the calcium salt, and the calcium salt is not easy to precipitate.
Description
Technical Field
The invention relates to the field of crude oil treatment, in particular to a crude oil decalcifying agent and a preparation method and application thereof.
Background
Crude oil contains various metal elements such as Ca, and these metal elements, although not contained in high amounts, are harmful to oil refining facilities such as catalyst activity and facility pipelines in the oil refining process and adversely affect the quality of oil refined products. Typically, the calcium in the crude oil is present as inorganic and organic compounds, including calcium chloride (CaCl)2) Calcium carbonate (CaCO)3) Calcium sulfate (CaSO)4) Calcium Naphthenate (Calcium naphenate), Calcium Fatty acid (Calcium Fatty Acids), Calcium phenate (Calcium Phenolate), and the like. Most of calcium in the crude oil is water-insoluble organic calcium enriched in the vacuum oil residue, and is generally difficult to remove.
Vacuum residuum produced by crude oil treatment has been generally used as fuel oil in the past, and many vacuum residuums are now used as feedstocks for hydrogenation and catalytic cracking in order to improve their utility values. In the processing technology of hydrogenation and catalytic cracking, calcium ions enable a catalyst to lose activity rapidly, and the calcium ions cover the catalyst which does not lose activity after generating large scale, so that the specific surface area of the catalyst is greatly reduced, and hydrogenation equipment cannot normally operate. And the catalyst efficiency is reduced and the consumption is increased due to the loss of activity of the catalyst. And the higher calcium content can cause the coke ash content of petroleum to be too high, the ductility of petroleum asphalt is reduced, and the quality of petroleum products seriously slides down. According to the detection of crude oil, the quality of crude oil is increasingly poor along with the mass production of crude oil, so that the calcium content in the crude oil is obviously increased compared with the past, and the harm to oil refining equipment is further increased. In addition, with the upgrading of the quality of the finished oil and the development of the refining process technology, the upper allowable limit of metal impurities in the crude oil is stricter and stricter in industry, so that higher requirements are also put on the decalcification of the crude oil.
With the continuous increase of calcium content in crude oil, research and development of decalcification technology are also receiving more and more attention. The traditional decalcification methods can be roughly classified into the following methods: microorganism decalcification, strong acid treatment decalcification, chelation decalcification, calcium salt precipitation decalcification, membrane separation decalcification, hydrogenation catalysis decalcification, resin decalcification, hydrogen peroxide decalcification, carbon dioxide decalcification, and extraction decalcification. Among them, the most widely used are the chelation decalcification method and the calcium salt precipitation decalcification method.
However, when high calcium crude oil is treated, calcium salt scale is often generated in situ due to the multiple increase of calcium salt concentration, so that equipment is blocked, and the continuous operation of production is influenced.
Disclosure of Invention
Therefore, it is necessary to provide a crude oil decalcifying agent which is not easy to scale and has high decalcification efficiency, and a preparation method and application thereof.
The invention provides a crude oil decalcifying agent, which comprises, by mass, 20-80 parts of a decalcifying main agent, 0.3-1 part of a corrosion inhibitor and 0.3-1 part of a scale inhibitor; the mass ratio of the corrosion inhibitor to the scale inhibitor is (0.5-2): 1; the corrosion inhibitor is organic amine; the scale inhibitor is selected from one or more of polyaspartic acid, polysuccinimide and hydrolyzed polymaleic anhydride.
In some of these embodiments, the organic amine is selected from one or more of imidazoline and its derivatives, aliphatic amines, alicyclic amines, aromatic amines, heterocyclic amines, and quaternary ammonium salts.
In some embodiments, the mass ratio of the corrosion inhibitor to the scale inhibitor is (0.8-1.2): 1.
In some of these embodiments, the corrosion inhibitor is an imidazoline quaternary ammonium salt and the scale inhibitor is polyaspartic acid.
In some of these embodiments, the decalcifying base is selected from one or more of lactic acid, citric acid, glycolic acid, and malic acid.
In some embodiments, the crude oil decalcifying agent comprises 70 to 80 parts by mass of the decalcifying main agent, 0.3 to 1 part by mass of the corrosion inhibitor and 0.3 to 1 part by mass of the scale inhibitor.
In some embodiments, the polypropylene glycol aqueous solution comprises 3 to 5 parts by mass; in the polypropylene glycol aqueous solution, the mass ratio of polypropylene glycol to water is 1: 5; and/or
According to the mass portion, the acrylic resin emulsion also comprises 2 to 5 portions of acrylic resin emulsion; the acrylic resin is selected from one or more of methyl acrylate, ethyl acrylate and butyl acrylate; in the acrylic resin solution, the mass ratio of acrylic resin to water is 1: 9.
In some of these embodiments, the components of the crude oil decalcifying agent further comprise water;
in the crude oil decalcifying agent, the main decalcifying agent accounts for 20-80 percent, the corrosion inhibitor accounts for 0.3-1 percent, and the scale inhibitor accounts for 0.3-1 percent in percentage by mass.
The crude oil decalcifying agent can effectively remove calcium ions contained in crude oil by selecting specific types and contents of the corrosion inhibitor and the scale inhibitor, controlling the proportion of the corrosion inhibitor and the scale inhibitor and coacting with the main decalcifying agent with specific content. The decalcification main agent, the corrosion inhibitor and the scale inhibitor of the crude oil decalcification agent have synergistic effect, can improve the solubility of calcium salt in water, has good decalcification effect and high decalcification efficiency, and can effectively prevent the blockage of equipment pipelines caused by the precipitation and scaling of the calcium salt, and the calcium salt is not easy to precipitate.
The invention also provides a preparation method of the crude oil decalcifying agent, which is characterized by comprising the following steps:
mixing the above crude oil decalcifying agent.
The invention also provides the application of the crude oil decalcifying agent in crude oil decalcification.
Drawings
FIG. 1 is a line graph showing the decalcification rates of the crude oil decalcifying agents of example 3 of the present invention at different ratios, wherein the calcium ratio on the abscissa represents the mass ratio of the crude oil decalcifying agent to the calcium content in the crude oil.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a crude oil decalcifying agent, which comprises, by mass, 20-80 parts of a decalcifying main agent, 0.3-1 part of a corrosion inhibitor and 0.3-1 part of a scale inhibitor; the mass ratio of the corrosion inhibitor to the scale inhibitor is (0.5-2): 1; the corrosion inhibitor is organic amine; the scale inhibitor is selected from one or more of polyaspartic acid, polysuccinimide and hydrolyzed polymaleic anhydride.
The crude oil decalcifying agent can effectively remove calcium ions contained in crude oil by selecting specific types and contents of the corrosion inhibitor and the scale inhibitor, controlling the proportion of the corrosion inhibitor and the scale inhibitor and coacting with the main decalcifying agent with specific content. The decalcification main agent, the corrosion inhibitor and the scale inhibitor of the crude oil decalcification agent have synergistic effect, can improve the solubility of calcium salt in water, has good decalcification effect and high decalcification efficiency, and can effectively prevent the blockage of equipment pipelines caused by the precipitation and scaling of the calcium salt because the calcium salt is not easy to precipitate out due to the calcium salt generated by the decalcification main agent and calcium ions. The solubility of calcium salt is improved, so that it has no need of adding phosphorus-containing chelating agent, such as sodium tripolyphosphate, etc. when the calcium is removed, so that it is environment-friendly, and the removed calcium-containing aqueous solution can be directly discharged.
In some of these embodiments, the organic amine is selected from one or more of imidazolines and derivatives thereof, aliphatic amines, alicyclic amines, aromatic amines, heterocyclic amines, and quaternary ammonium salts.
In some of these embodiments, the imidazoline derivative is selected from one or more of a quaternary ammonium salt of imidazoline, an oleate salt of imidazoline, and a dimer acid salt of imidazoline.
In some embodiments, the mass ratio of the corrosion inhibitor to the scale inhibitor is (0.8-1.2): 1. Preferably, the mass ratio of the corrosion inhibitor to the scale inhibitor is 1: 1. the corrosion inhibitor and the scale inhibitor have good synergistic effect in the proportion, can greatly improve the solubility of calcium salt in water, and reduce the deposition and scaling of the calcium salt on equipment and pipelines.
In some of these embodiments, the corrosion inhibitor is an imidazoline quaternary ammonium salt and the scale inhibitor is polyaspartic acid. The imidazoline quaternary ammonium salt and the polyaspartic acid have a synergistic effect, can improve the water solubility of the calcium salt, and reduce the scale formation of the calcium salt on the surface of equipment.
In some of these embodiments, the decalcifying base is selected from one or more of lactic acid, citric acid, glycolic acid, and malic acid. In the present invention, the main decalcifying agent using an organic acid is capable of forming a calcium salt insoluble in crude oil with calcium ions by chelation or the like to decalcify the calcium ions in the crude oil.
In some embodiments, the crude oil decalcifying agent comprises 70 to 80 parts by mass of a decalcifying main agent, 0.3 to 1 part by mass of a corrosion inhibitor and 0.3 to 1 part by mass of a scale inhibitor. The crude oil decalcifying agent has high main decalcifying agent content, and is especially suitable for decalcifying treatment of high calcium crude oil.
In some embodiments, the crude oil decalcifying agent further comprises 3 to 5 parts by mass of a polypropylene glycol aqueous solution; in the polypropylene glycol aqueous solution, the mass ratio of polypropylene glycol to water is 1: 5. Preferably, the molecular weight of the polypropylene glycol is 400-600. The polypropylene glycol contains a large amount of ether bonds and has good dispersion effect, the polypropylene glycol aqueous solution can be used as a dispersant to disperse large calcium salt solids separated from crude oil into fine particles, so that the calcium salt is not easy to scale, and the polypropylene glycol aqueous solution has synergistic effect when being combined with a scale inhibitor, so that the solubility of the calcium salt in water is further improved.
In some embodiments, the crude oil decalcifying agent further comprises 2 to 5 parts by mass of acrylic resin emulsion; the acrylic resin is selected from one or more of methyl acrylate, ethyl acrylate and butyl acrylate; in the acrylic resin solution, the mass ratio of acrylic resin to water is 1: 9. The acrylic resin emulsion can be used as a surfactant to reduce the surface tension between an oil layer and a water layer, so that the crude oil and the decalcifying agent can be mixed more uniformly, the contact between the decalcifying agent and the crude oil is increased, and the decalcification rate is further improved.
In some of these embodiments, the components of the crude oil decalcifying agent further comprise water; specifically, in the crude oil decalcifying agent, according to the mass percentage, the main decalcifying agent is 20-80%, the corrosion inhibitor is 0.3-1%, and the scale inhibitor is 0.3-1%.
Further, the crude oil decalcifying agent also comprises 3-5% of polypropylene glycol aqueous solution in percentage by mass.
Further, the crude oil decalcifying agent also comprises 2-5% of acrylic resin emulsion by mass percent.
Preferably, the crude oil decalcifying agent comprises the following components in percentage by mass:
although the decalcification rate can be improved by increasing the amount of citric acid, the precipitation rate of calcium salt after decalcification can be improved, and the solubility of citric acid in water is limited, so that the mass percent of citric acid is preferably controlled to be not more than 15% in the embodiment of the invention.
The crude oil decalcifying agent uses citric acid and lactic acid as main decalcifying agents, can coordinate and chelate with calcium ions to form calcium citrate and calcium lactate, the solubility of the calcium citrate in water is low, the solubility of calcium salt in water can be improved by using polyaspartic acid as a scale inhibitor, imidazoline quaternary ammonium salt as a corrosion inhibitor forms a layer of protective film on the surfaces of equipment and pipelines, and the protective film and the imidazoline quaternary ammonium salt can jointly act to effectively prevent the generated calcium salt from depositing on the surfaces of the equipment and the pipelines.
Preferably, the crude oil decalcifying agent comprises the following components in percentage by mass:
the embodiment of the invention also provides a preparation method of the crude oil decalcifying agent, which is characterized by comprising the following steps: mixing the above crude oil decalcifying agent.
The embodiment of the invention also provides the application of the crude oil decalcifying agent in crude oil decalcification. The crude oil decalcifying agent can effectively remove calcium ions in crude oil and avoid scale formation and blockage of the removed calcium salt on the surface of equipment.
In some embodiments, the mass ratio of the crude oil decalcifying agent to the calcium content in the crude oil (abbreviated as agent calcium ratio) is (3-5): 1. The calcium ratio of the agent is (3-5): 1, so that a good decalcification effect can be achieved, and the decalcification rate can reach more than 80%.
The following are specific examples.
Example 1:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 2:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 3:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 4:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 5:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 6:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 7:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 8:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 9:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 10:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 11:
the crude oil decalcifying agent comprises the following components in percentage by mass:
example 12:
the crude oil decalcifying agent comprises the following components in percentage by mass:
comparative example 1:
the crude oil decalcifying agent comprises the following components in percentage by mass:
comparative example 2:
the crude oil decalcifying agent comprises the following components in percentage by mass:
comparative example 3:
the crude oil decalcifying agent comprises the following components in percentage by mass:
comparative example 4:
the crude oil decalcifying agent comprises the following components in percentage by mass:
comparative example 5:
the crude oil decalcifying agent comprises the following components in percentage by mass:
evaluation:
firstly, crude oil with the water content of 10 percent and the calcium content of 213ppm/g is taken by a crude oil demulsifying special bottle and added with a demulsifying agent, the crude oil decalcifying agent in the embodiment 3 is added according to the mass ratio (agent calcium ratio for short) of the crude oil decalcifying agent to the calcium content in the crude oil of 1:1, 2:1, 3:1, 4:1 and 5:1, the crude oil is put into a water bath with the temperature of 90 ℃ for demulsifying and decalcifying for 3h to 4h after being vibrated uniformly, and the treated crude oil is taken to measure the calcium content so as to measure the decalcification rate.
Referring to fig. 1, it can be seen that the decalcification rate of the crude oil decalcifying agent is gradually increased with the increasing of the calcium dose ratio, and the decalcification rate of the crude oil decalcifying agent can reach more than 80% when the calcium dose ratio is more than 3: 1. When the agent calcium ratio is 4:1, the decalcification rate of the crude oil decalcification agent is close to 95 percent. Therefore, the evaluation test was carried out below for each example and comparative example under the condition that the calcium ratio of the agent was 4: 1.
The method comprises the steps of taking crude oil with the water content of 10% and the calcium content of 213ppm/g by using a crude oil demulsification special bottle, adding a demulsifying agent into the crude oil, respectively adding the crude oil decalcifying agents of examples 1-10 and comparative examples 1-5 according to the mass ratio (agent calcium ratio for short) of the crude oil decalcifying agent to the calcium content of the crude oil of 4:1, placing the mixture into a water bath at 90 ℃ after uniform shaking for demulsification and decalcification for 3-4 h, taking the treated crude oil, measuring the calcium content to determine the decalcification rate, and observing the appearance of a water layer in the bottle.
TABLE 1
As can be seen from the data in table 1, the main decalcifying agents in the crude oils of examples 1 to 4 were lactic acid and citric acid, and the main decalcifying agents were 20%, 50%, 70% and 80% by mass, and the decalcification rates were 44.2%, 71.4%, 95.3% and 96.6%, respectively. It can be seen that the decalcification rate of the crude oil is gradually increased with the increase of the main decalcification agent content, and the decalcification rate is basically stabilized above 95% when the main decalcification agent content exceeds 70%. The main decalcifying agents of example 5 are lactic acid and glycolic acid, and the decalcifying effect is slightly lower than that of example 4.
Example 6 the crude oil decalcifying agent contained imidazoline quaternary ammonium salt in an amount of 0.5% by mass and polyaspartic acid in an amount of 1% by mass at a ratio of 0.5:1, had a decalcification rate of 93.3%, was comparable to that of example 3, and had no calcium salt deposited on the water layer and the bottle wall.
Example 7 the crude oil decalcifying agent contained 0.8% by mass of imidazoline quaternary ammonium salt and 0.4% by mass of polyaspartic acid, in a ratio of 2:1, and had a decalcification rate of 92.7%, which was not much different from that of example 3, and no calcium salt was deposited on the water layer and the bottle wall.
The crude oil decalcifying agents of examples 8 to 10 were each prepared by replacing the imidazoline quaternary ammonium salt of example 3 with triethylenetetramine, replacing the polyaspartic acid of example 3 with polybutylimide, and replacing the polyaspartic acid of example 3 with hydrolyzed polymaleic anhydride. The decalcification rates of examples 8 to 10 were 94.9%, 94.7% and 94.1%, respectively, which were not much different from those of example 3, and no calcium salt was deposited on the water layer and the bottle wall.
Although the crude oil decalcifying agent of example 11 added a polypropylene glycol aqueous solution as a dispersant, the contents of imidazoline quaternary ammonium salt and polyaspartic acid were both lower than those of the crude oil decalcifying agent of example 3, good decalcifying effect was still achieved, and no calcium salt was deposited on the water layer and the bottle wall.
The crude oil decalcifying agent of example 12 added an acrylic resin solution as a surfactant, and had a decalcification rate of 96.1% which was higher than that of the crude oil decalcifying agent of comparative example 3, and no calcium salt was deposited on the water layer and the bottle wall.
Compared with examples 3, 6 and 7, the crude oil decalcifying agent of the comparative example 2 adopts the corrosion inhibitor and the scale inhibitor with the mass ratio of 5:1, although no calcium salt scale is attached to the bottle wall, solid deposition exists in a water layer, namely calcium salt is separated out, and the scale inhibition effect is poor.
Imidazoline and derivatives thereof are used as corrosion inhibitors to mainly play a role in corrosion inhibition and protection of equipment, prevent calcium salt from directly depositing and attaching to the surfaces of the equipment and pipelines, and have a synergistic effect when used together with a scale inhibitor. However, the use of imidazoline and its derivatives alone did not improve the water solubility of the calcium salt, and in comparative example 3, 1% imidazoline quaternary ammonium salt alone was used, and the calcium salt generated by decalcification filled the water layer. In contrast, in comparative example 4, which used 1% polyaspartic acid alone, calcium scale was adhered to the wall of the bottle although no precipitate was formed in the water layer. Due to the addition of the scale inhibitor polyaspartic acid, it was found that precipitation of calcium salts in water was greatly reduced after decalcification, and calcium salts were substantially soluble in water after addition of a sufficient amount of scale inhibitor. Therefore, calcium salt deposition caused by calcium salt precipitation can not occur even when higher calcium crude oil is processed, and further equipment and pipelines can not be blocked. However, if the amount of the corrosion inhibitor and the scale inhibitor is too large (see the comparative example 5), the decalcification rate is reduced, so that the proper content needs to be selected to achieve high decalcification rate and corrosion and scale inhibition, and the proper content is 0.3-1%. And the addition of phosphorus-containing compounds such as sodium tripolyphosphate and the like as a chelating agent into the crude oil decalcifying agent is not needed, so that element components which are not friendly to the environment are not introduced, and the separated calcium-containing aqueous solution can be directly discharged.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The crude oil decalcifying agent is characterized by comprising, by mass, 20-80 parts of a decalcifying main agent, 0.3-1 part of a corrosion inhibitor and 0.3-1 part of a scale inhibitor; the mass ratio of the corrosion inhibitor to the scale inhibitor is (0.5-2): 1; the corrosion inhibitor is organic amine; the scale inhibitor is selected from one or more of polyaspartic acid, polysuccinimide and hydrolyzed polymaleic anhydride.
2. The crude oil decalcifying agent according to claim 1, wherein the organic amine is selected from one or more of imidazoline and its derivatives, aliphatic amine, alicyclic amine, aromatic amine, heterocyclic amine, and quaternary ammonium salt.
3. The crude oil decalcifying agent according to claim 1, wherein the mass ratio of the corrosion inhibitor to the scale inhibitor is (0.8-1.2): 1.
4. The crude oil decalcifying agent according to claim 1, wherein the corrosion inhibitor is imidazoline quaternary ammonium salt and the scale inhibitor is polyaspartic acid.
5. The crude oil decalcifying agent according to claim 1, wherein the decalcifying main agent is selected from one or more of lactic acid, citric acid, glycolic acid and malic acid.
6. The crude oil decalcifying agent according to claim 1, wherein in the crude oil decalcifying agent, the main decalcifying agent is 70 to 80 parts by mass, the corrosion inhibitor is 0.3 to 1 part by mass, and the scale inhibitor is 0.3 to 1 part by mass.
7. The crude oil decalcifying agent according to claim 1, further comprising 3 to 5 parts by mass of an aqueous solution of polypropylene glycol; in the polypropylene glycol aqueous solution, the mass ratio of polypropylene glycol to water is 1: 5; and/or
According to the mass portion, the acrylic resin emulsion also comprises 2 to 5 portions of acrylic resin emulsion; the acrylic resin is selected from one or more of methyl acrylate, ethyl acrylate and butyl acrylate; in the acrylic resin solution, the mass ratio of acrylic resin to water is 1: 9.
8. The crude oil decalcifying agent according to any one of claims 1 to 7, wherein the components of the crude oil decalcifying agent further comprise water;
in the crude oil decalcifying agent, the main decalcifying agent accounts for 20-80 percent, the corrosion inhibitor accounts for 0.3-1 percent, and the scale inhibitor accounts for 0.3-1 percent in percentage by mass.
9. The preparation method of the crude oil decalcifying agent is characterized by comprising the following steps:
mixing the components of the crude oil decalcifying agent according to any one of claims 1 to 7.
10. Use of the crude oil decalcifying agent according to any one of claims 1 to 7 in crude oil decalcification.
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| CN115301711A (en) * | 2022-08-04 | 2022-11-08 | 江山市虎鼎环保科技有限公司 | Anti-blocking method for washing and filter pressing fly ash |
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| 王新刚: "咪唑啉类缓蚀剂及聚天冬氨酸阻垢剂的制备及其性能研究", 《中国优秀硕士学位论文全文数据库（电子期刊）工程科技I辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113388457A (en) * | 2021-07-19 | 2021-09-14 | 成都扬华源动新材料科技有限公司 | Dredging cleaning agent and preparation method thereof |
| CN113388457B (en) * | 2021-07-19 | 2022-05-03 | 成都扬华源动新材料科技有限公司 | Dredging cleaning agent and preparation method thereof |
| CN115301711A (en) * | 2022-08-04 | 2022-11-08 | 江山市虎鼎环保科技有限公司 | Anti-blocking method for washing and filter pressing fly ash |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112552952B (en) | 2022-10-04 |
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