CN110951460A - Composite additive for enhancing wall-hanging performance of antifreeze for railway coal transportation - Google Patents
Composite additive for enhancing wall-hanging performance of antifreeze for railway coal transportation Download PDFInfo
- Publication number
- CN110951460A CN110951460A CN201911230079.6A CN201911230079A CN110951460A CN 110951460 A CN110951460 A CN 110951460A CN 201911230079 A CN201911230079 A CN 201911230079A CN 110951460 A CN110951460 A CN 110951460A
- Authority
- CN
- China
- Prior art keywords
- polyacrylamide
- parts
- antifreeze
- coal transportation
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/18—Materials not provided for elsewhere for application to surfaces to minimize adherence of ice, mist or water thereto; Thawing or antifreeze materials for application to surfaces
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
- C08F8/32—Introducing nitrogen atoms or nitrogen-containing groups by reaction with amines
Abstract
A composite additive for enhancing the wall-hanging performance of an antifreezing agent for railway coal transportation belongs to the technical field of chemical additives. The composite additive is a composite thickener, mainly uses hydroxypropyl guar gum as a main component, and is compounded with amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate. The environment-friendly coal transportation antifreezing agent prepared by the additive disclosed by the invention can improve the product viscosity by 71.31% (0 ℃) due to 0.5% of the addition amount, so that the flowing time of the antifreezing agent on the side wall of a train is prolonged, the wall-hanging performance of the antifreezing agent on the side wall of the train is enhanced, and the antifreezing agent has no influence on coal quality and subsequent use.
Description
Technical Field
The invention belongs to the technical field of chemical additives, and particularly relates to a composite additive for enhancing the wall-hanging performance of an antifreezing agent for railway coal transportation.
Background
China is the largest world coal producing and selling country, and due to the characteristic of uneven distribution of coal resources in China, a large amount of coal needs to be transported to the southeast coastal areas through railways. Coal is easy to freeze in the loading, unloading, staying and transporting processes in winter, and the method is a great problem which troubles coal enterprises. After the coal is washed and selected in China at present, the residual moisture in the coal is 6.5-18%, free water gradually concentrates to the bottom of a coal bed in the process of coal storage or transportation, in cold winter, coal, water at the bottom of a train and the bottom of a carriage can be frozen together, and the amount of frozen coal accounts for 7-14% of the coal loading amount of each carriage when no anti-freezing solution is used. The frozen coal is difficult to load and unload, which causes the problems of pressing vehicles, pressing lines or pressing ports and influences the normal production and the turnover of train wagons.
At present, all coal enterprises in China adopt antifreeze spray to relieve the problem of frozen coal in coal transportation in winter. At present, the antifreezing agent mainly comprises a calcium chloride type antifreezing agent and an environment-friendly chlorine-free coal transportation antifreezing agent developed by coal science and technology research institute limited company, and the environment-friendly chlorine-free coal transportation antifreezing agent is commercially applied to Shenhua Shendong company. However, at present, both calcium chloride type antifreeze and chlorine-free antifreeze have the defects of low viscosity, poor metal adhesion and limited wall-hanging performance on the side wall of a train carriage, so that the antifreeze effect of the side wall of the train is influenced, and an additive with excellent performance is urgently needed to be developed to improve the wall-hanging performance.
Guar gum and a chemical modified product of the guar gum are natural high-molecular vegetable gum, have good thickening performance, have good shear rheology after gelling, are beneficial to pumping and spraying, and meet the use working condition of coal transportation antifreezing agents, however, the guar gum and the derivatives have relatively poor salt resistance, high water insoluble substances, and particularly have low solubility under the low-temperature condition. The coal transportation antifreezing agent is usually a strong electrolyte aqueous solution, has higher concentration and is close to saturation, and is used at low temperature, so that the viscosity of the coal transportation antifreezing agent cannot be improved by using the guar gum and the derivative, and the wall hanging performance of the coal transportation antifreezing agent is further enhanced.
The polyacrylamide is one of the most widely applied varieties in water-soluble polymers, and has better thickening performance and rheological control effect. But they tend to agglomerate in aqueous solutions, especially strong electrolyte systems. Therefore, the polyacrylamide needs to be modified to avoid the defect of easy agglomeration.
The invention develops a composite additive for enhancing the wall-hanging performance of an antifreezing agent for railway coal transportation. The composite additive is used for adjusting the viscosity of the coal transportation antifreezing agent, so that the flowing time of the coal transportation antifreezing agent on the side wall of the train is prolonged, the wall hanging performance of the coal transportation antifreezing agent on the side wall of the train is enhanced, the antifreezing performance of the railway coal transportation antifreezing agent on the side wall of the train is further enhanced, and in addition, the composite additive is biodegradable and has no influence on the coal quality and the subsequent use.
Disclosure of Invention
Aiming at the defects of the wall-hanging performance of the existing antifreeze, the invention aims to provide a composite additive for enhancing the wall-hanging performance of the antifreeze for railway coal transportation and further discloses a preparation method of the composite additive.
In order to solve the technical problems, the composite additive for enhancing the wall-hanging performance of the railway coal transportation antifreeze comprises the following components: hydroxypropyl guar gum, amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate.
The preparation method of the amido hydroxyethyl polyacrylamide comprises the following steps:
(1) adjusting the pH value of 1-3% polyacrylamide aqueous solution to 8.0-9.0 by using strong sodium oxide, slowly adding glyoxal into the polyacrylamide aqueous solution at the temperature of 70-80 ℃ until the mixture is completely and uniformly mixed, and keeping the temperature within the range of 1.0-2.0 hours to prepare hydroxyethyl polyacrylamide aqueous solution;
the mass ratio of the glyoxal to the polyacrylamide is 1: 2-3;
(2) slowly adding ethylenediamine into the hydroxyethyl polyacrylamide aqueous solution prepared in the step (1) at the temperature of 45-55 ℃ until the mixture is completely and uniformly mixed, then heating to 80-95 ℃ for reaction for 3.0-4.0 hours, and carrying out rotary evaporation and infrared drying on the reaction solution to obtain amino hydroxyethyl polyacrylamide;
the mass ratio of the ethylenediamine to the polyacrylamide is 1: 2-2.5.
Preferably, the composite additive comprises the following components in parts by weight: 60-75 parts of hydroxypropyl guar gum, 11-20 parts of amino hydroxyethyl polyacrylamide, 9-20 parts of xanthan gum, 2-6 parts of disodium ethylene diamine tetraacetate and 0.1-0.5 part of sodium carbonate. Further preferably: 65 parts of hydroxypropyl guar gum, 19 parts of amino hydroxyethyl polyacrylamide, 12 parts of xanthan gum, 4 parts of disodium ethylene diamine tetraacetate and 0.3 part of sodium carbonate.
The invention also discloses a preparation method for preparing the composite additive, which comprises the following steps:
sequentially adding selected amounts of hydroxypropyl guar gum, amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate into a reaction kettle, quickly and uniformly mixing at normal temperature, and subpackaging into a woven bag with a polyethylene lining to obtain the finished product.
In the step, the rapid mixing is performed uniformly for a mixing time of not more than 20 min.
The invention also discloses application of the composite additive in the field of railway coal transportation antifreezes in winter.
The composite additive for enhancing the wall-hanging performance of the railway coal transportation antifreezing agent mainly takes hydroxypropyl guar gum as a main component, and is compounded with the composite additive consisting of amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate, and particularly, the introduced amino hydroxyethyl polyacrylamide and the hydroxypropyl guar gum have a synergistic effect, so that the additive is low in dosage and excellent in thickening performance, and the additive is biodegradable and meets the environment-friendly requirement. The environment-friendly coal transportation antifreezing agent prepared by the additive disclosed by the invention has the advantages that the viscosity of the product can be improved by 71.31% (0 ℃) due to 0.5% of the addition amount, so that the flowing time of the product on the side wall of a train is prolonged, the wall hanging performance of the product on the side wall of the train is enhanced, and the environment-friendly coal transportation antifreezing agent has no influence on coal quality and subsequent use. The composite additive is suitable for improving the wall-hanging performance of the coal transportation antifreezing agent and improving the train side wall antifreezing performance in the coal outward transportation process in winter.
Drawings
FIG. 1 is a graph showing the effect of a composite additive on the viscosity of an environmentally friendly coal transportation antifreeze.
FIG. 2 is a schematic view of a device for testing wall-hanging performance of coal antifreeze solution for railway transportation and a use method thereof.
1-constant temperature test box, 2-thermometer and sensor, 3-automatic constant pressure quantitative injector and support, 4-test carriage base material test piece, 5-refrigeration tube, 6-fixing screw, 7-mass sensor, 8-precision electronic scale, 9-compressor and 10-stopwatch.
Detailed Description
The present invention is further described with reference to practical examples, and the embodiments of the present invention are only used for illustrating the technical solutions of the present invention, and are not limited to the present invention.
Example 1
The composite additive comprises the following components in parts by weight: 60 parts of hydroxypropyl guar gum, 19 parts of amino hydroxyethyl polyacrylamide, 17 parts of xanthan gum, 4 parts of disodium ethylene diamine tetraacetate and 0.3 part of sodium carbonate.
The composite additive described in this example was prepared as follows:
sequentially adding selected amounts of hydroxypropyl guar gum, amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate into a reaction kettle, quickly mixing at normal temperature for 15min, and subpackaging into woven bags with polyethylene liners.
Example 2
The composite additive comprises the following components in parts by weight: 65 parts of hydroxypropyl guar gum, 19 parts of amino hydroxyethyl polyacrylamide, 12 parts of xanthan gum, 4 parts of disodium ethylene diamine tetraacetate and 0.3 part of sodium carbonate.
The composite additive described in this example was prepared as follows:
sequentially adding selected amounts of hydroxypropyl guar gum, amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate into a reaction kettle, quickly mixing at normal temperature for 12min, and subpackaging into woven bags with polyethylene liners.
Example 3
The composite additive comprises the following components in parts by weight: 74 parts of hydroxypropyl guar gum, 10 parts of amino hydroxyethyl polyacrylamide, 12 parts of xanthan gum, 4 parts of disodium ethylene diamine tetraacetate and 0.3 part of sodium carbonate.
The composite additive described in this example was prepared as follows:
sequentially adding selected amounts of hydroxypropyl guar gum, amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate into a reaction kettle, quickly mixing at normal temperature for 17min, and subpackaging into woven bags with polyethylene liners.
Application examples
In order to test the application condition of the composite additive for enhancing the wall-hanging performance of the railway coal transportation antifreeze, the composite additive is prepared by the formula composition and the preparation method of the embodiment 1, the railway coal transportation antifreeze is composed of the formula (11 parts of potassium acetate, 12 parts of sodium formate, 10.5 parts of urea, 4 parts of ethylene glycol, 1.0 part of glycerol, 1.5 parts of sodium benzoate, 0.08 part of benzotriazole and 60 parts of water) of the embodiment 3 in the patent of an environment-friendly coal transportation antifreeze and the preparation method thereof (application number: 201811290510.1) and the preparation method ((1) the selected amount of water, potassium acetate, sodium formate, urea, benzotriazole and sodium benzoate are added into a reaction kettle to be mixed evenly, the reaction system is controlled to be heated to 75 ℃ and stirred for 2h until the materials are completely dissolved), (2) then the selected amount of ethylene glycol and glycerol are sequentially added into the reaction kettle to be mixed evenly and stirred until the materials are completely dissolved, then, the temperature was decreased to 25 ℃, and discharging was performed) by comparing the viscosity change at different temperatures of the antifreeze to which the 0.5% composite additive prepared in example 2 was added with that of the antifreeze to which no composite additive was added (note: viscosity was measured by NDJ-8S rotational viscometer, spindle: 1# or 0#, instrument manufacturer: shanghai Changji geological instruments, Inc.), see FIG. 1 for details.
Compared with the wall hanging performance at 0 ℃ through a patent test device for the wall hanging performance of the coal antifreeze fluid for railway transportation and a use method thereof (application number: 201911135602.7), the flowing time is increased by 36.28%, and the wall hanging residual quantity is increased by 25.43%. In conclusion, the viscosity of the antifreeze is obviously improved by adding the composite additive, and the wall-hanging performance of the antifreeze is enhanced.
The patent of a device for testing the wall-hanging performance of antifreeze solution for railway transportation of coal and a use method thereof (application number: 201911135602.7) specifically comprises the following steps: the device for testing the wall-hanging performance of the antifreeze solution for railway transportation of coal comprises a constant-temperature test box, a refrigerant pipe, a constant-pressure quantitative injector, a carriage material to be tested, a timer, a temperature sensor and a quality sensor, wherein the constant-pressure quantitative injector, the carriage material to be tested, the timer, the temperature sensor and the quality sensor are all arranged in the constant-temperature box, and the carriage material to be tested is arranged in the constant-temperature box in a way of being vertical to a bottom plate of the constant-temperature box; the constant-pressure quantitative injector is specifically arranged at the upper part of the constant temperature box, the injection head is connected with the surface of the carriage material to be detected, and the anti-freezing solution can be uniformly injected onto the carriage material to be detected; the temperature sensor is connected with the refrigerant pipe; the mass sensor is connected with the electronic balance measuring device; the timer is fixed on the upper part of the front panel of the constant temperature test box.
A method for testing the wall hanging performance of an antifreeze by using the device comprises the following steps: with mass maThe antifreeze is quickly injected to the test starting point of the height h through a constant-pressure quantitative injector, the time t of the first antifreeze drop into a surface dish is recorded through a timer, and the mass m of the antifreeze finally dropped into the surface dish is recorded through an electronic balancebAnd finally, calculating the antifreeze (m) remained on the carriage material to be measureda-mb) And judging the wall-hanging performance of the antifreeze according to the passing rate and the residual rate of the first drop of antifreeze on the material to be detected. The residue rate calculation formula in the method is (m)a-mb)/maAnd calculating the formula h/t through the rate.
Under the condition of 0 ℃, based on the formula composition and the preparation method of the embodiment 3 in the patent of environment-friendly coal transportation antifreeze and the preparation method thereof (application number: 201811290510.1), 0.5% of the composite additive prepared in the embodiments 1, 2 and 3 is added, the wall-hanging performance of the antifreeze liquid for railway transportation is tested by the patent of testing device and using method thereof (application number: 201911135602.7), a test piece of a carriage substrate to be tested is a C80 side wall aluminum alloy plate, the material is 5083-H321, the effective height is 400mm (the mass of the antifreeze liquid sample is 2.0g, and the needle adopts a No. 5 needle), and the specific test results are as follows in the following table 1:
the above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. 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 such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The composite additive for enhancing the wall-hanging performance of the railway coal transportation antifreeze is characterized by comprising the following components: hydroxypropyl guar gum, amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate.
2. The compound additive for enhancing the wall hanging performance of the railway coal transportation antifreeze according to claim 1, wherein the preparation method of the amino hydroxyethyl polyacrylamide comprises the following steps:
(1) regulating the pH value of a polyacrylamide aqueous solution to 8.0-9.0 by using strong sodium oxide, slowly adding glyoxal into the polyacrylamide aqueous solution at the temperature of 70-80 ℃ until the glyoxal is completely and uniformly mixed, and keeping the temperature within the temperature range for 1.0-2.0 hours to prepare a hydroxyethyl polyacrylamide aqueous solution;
(2) and (2) slowly adding ethylenediamine into the hydroxyethyl polyacrylamide aqueous solution prepared in the step (1) at the temperature of 45-55 ℃ until the mixture is completely and uniformly mixed, then heating to 80-95 ℃ for reaction for 3.0-4.0 hours, carrying out rotary evaporation on the reaction liquid, and carrying out infrared drying to obtain the amino hydroxyethyl polyacrylamide.
3. The composite additive for enhancing the wall hanging performance of the railway coal transportation antifreeze according to claim 1, wherein the mass concentration of the polyacrylamide aqueous solution is 1-3%, and the mass ratio of glyoxal to polyacrylamide is 1: 2-3; the mass ratio of the ethylenediamine to the polyacrylamide is 1: 2-2.5.
4. The compound additive for enhancing the wall hanging performance of the railway coal transportation antifreeze according to claim 1, which is characterized by comprising the following components in parts by weight: 60-75 parts of hydroxypropyl guar gum, 11-20 parts of amino hydroxyethyl polyacrylamide, 9-20 parts of xanthan gum, 2-6 parts of disodium ethylene diamine tetraacetate and 0.1-0.5 part of sodium carbonate. Further preferably: 65 parts of hydroxypropyl guar gum, 19 parts of amino hydroxyethyl polyacrylamide, 12 parts of xanthan gum, 4 parts of disodium ethylene diamine tetraacetate and 0.3 part of sodium carbonate.
5. The compound additive for enhancing the wall hanging performance of the railway coal transportation antifreeze as claimed in claim 4, wherein the compound additive comprises 65 parts of hydroxypropyl guar gum, 19 parts of amino hydroxyethyl polyacrylamide, 12 parts of xanthan gum, 4 parts of disodium ethylenediamine tetraacetate and 0.3 part of sodium carbonate.
6. The preparation method of the composite additive for enhancing the wall-hanging performance of the railway coal transportation antifreeze as claimed in any one of claims 1 to 5, is characterized by comprising the following steps:
sequentially adding selected amounts of hydroxypropyl guar gum, amino hydroxyethyl polyacrylamide, xanthan gum, disodium ethylene diamine tetraacetate and sodium carbonate into a reaction kettle, quickly and uniformly mixing at normal temperature, and subpackaging into a woven bag with a polyethylene lining to obtain the finished product.
7. The method of claim 6, wherein said rapid mixing is uniform with a mixing time of no more than 20 min.
8. The use of the composite additive for enhancing the wall-hanging performance of the railway coal transportation antifreeze agent as set forth in any one of claims 1 to 5, wherein the composite additive is applied to the field of winter railway coal transportation antifreeze agents.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911230079.6A CN110951460A (en) | 2019-12-04 | 2019-12-04 | Composite additive for enhancing wall-hanging performance of antifreeze for railway coal transportation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911230079.6A CN110951460A (en) | 2019-12-04 | 2019-12-04 | Composite additive for enhancing wall-hanging performance of antifreeze for railway coal transportation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110951460A true CN110951460A (en) | 2020-04-03 |
Family
ID=69979814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911230079.6A Pending CN110951460A (en) | 2019-12-04 | 2019-12-04 | Composite additive for enhancing wall-hanging performance of antifreeze for railway coal transportation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110951460A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112251195A (en) * | 2020-11-03 | 2021-01-22 | 浙江浙能技术研究院有限公司 | Chlorine-free coal transportation and storage antifreezing agent |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1583939A (en) * | 2003-08-18 | 2005-02-23 | 侯宏森 | Efficient multifunctional low-temperature resisting antifreezing fluid |
| CN104830277A (en) * | 2015-03-30 | 2015-08-12 | 内蒙古博冉科技有限责任公司 | Wall hanging anti-freezing tackifier |
| CN108641701A (en) * | 2018-06-12 | 2018-10-12 | 禹王投资控股有限公司 | Clean and environment-friendly fracturing fluid complex thickener and preparation method |
| CN109337649A (en) * | 2018-12-12 | 2019-02-15 | 神木市锦界安顺煤矿机电修造有限公司 | Railway Coal transports the antifreeze tackifier of railway carriage |
| CN109370521A (en) * | 2018-12-12 | 2019-02-22 | 神木市锦界安顺煤矿机电修造有限公司 | Railway transportation coal oiliness antifreezing agent |
-
2019
- 2019-12-04 CN CN201911230079.6A patent/CN110951460A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1583939A (en) * | 2003-08-18 | 2005-02-23 | 侯宏森 | Efficient multifunctional low-temperature resisting antifreezing fluid |
| CN104830277A (en) * | 2015-03-30 | 2015-08-12 | 内蒙古博冉科技有限责任公司 | Wall hanging anti-freezing tackifier |
| CN108641701A (en) * | 2018-06-12 | 2018-10-12 | 禹王投资控股有限公司 | Clean and environment-friendly fracturing fluid complex thickener and preparation method |
| CN109337649A (en) * | 2018-12-12 | 2019-02-15 | 神木市锦界安顺煤矿机电修造有限公司 | Railway Coal transports the antifreeze tackifier of railway carriage |
| CN109370521A (en) * | 2018-12-12 | 2019-02-22 | 神木市锦界安顺煤矿机电修造有限公司 | Railway transportation coal oiliness antifreezing agent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112251195A (en) * | 2020-11-03 | 2021-01-22 | 浙江浙能技术研究院有限公司 | Chlorine-free coal transportation and storage antifreezing agent |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2015109917A1 (en) | Thickener for shale gas fracturing fluid, fracturing fluid and preparation method and use thereof | |
| CN108518216B (en) | A kind of plugging effect evaluation method of low slit low permeability formation | |
| CN106566491B (en) | A kind of starch/Nano-meter SiO_22Plural gel and the preparation method and application thereof | |
| CN103911134B (en) | Compound profile-controlling and plugging agent | |
| US9850179B2 (en) | Granular humate for spray application and process of making same | |
| CN110951460A (en) | Composite additive for enhancing wall-hanging performance of antifreeze for railway coal transportation | |
| NO344594B1 (en) | Method for preventing freezing damage of latex particles in a drilling fluid system, as well as a circulation pellet comprising latex particles | |
| CN113637453A (en) | Antifreezing agent, preparation method and application thereof | |
| CN104262544A (en) | Environment-friendly high-strength acrylate grouting material and using method thereof | |
| CN108424762B (en) | Self-suspending proppant for hydraulic fracturing and preparation method thereof | |
| CN105712865B (en) | Solid citric acid aluminum crosslinker, preparation method and its application | |
| CN108728053A (en) | A kind of low solid phase salt-water drilling fluid environmentally friendly heat and salinity tolerance closure fluid loss additive and preparation method thereof | |
| CN110028933A (en) | A kind of no chlorine Railway Coal transport antifreezing agent | |
| CN101337796B (en) | Liquid cement mortar capable of being stored | |
| CN109971452A (en) | A kind of low-temperature activation agent and low temperature fracture fluid system | |
| CN105131915A (en) | High-temperature-resistant high-density solid-phase-free formate drilling fluid system | |
| CN115505372B (en) | Method for preparing coal antifreezing solution by using ammonia-soda waste liquid and coal antifreezing solution | |
| CN111548782B (en) | Nano-enhanced supermolecule clean fracturing fluid and preparation method thereof | |
| CN111187607B (en) | Temperature response type hydrogel temporary plugging diversion fracturing fluid and preparation method and application thereof | |
| CN112251195A (en) | Chlorine-free coal transportation and storage antifreezing agent | |
| CN101279860B (en) | Method for improving appearance quality of granules made from diammonium phosphate slurry | |
| CN110982491A (en) | Efficient composite additive of coal transportation antifreezing agent | |
| CN111088002B (en) | Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof | |
| CN113652201A (en) | Antifreezing agent, preparation method and application thereof | |
| CA1216417A (en) | Compositions of polymer systems, and their use for example in hydraulic fracturing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200403 |
|
| WD01 | Invention patent application deemed withdrawn after publication |