CN115466074A - Cement production method by adding naphthalene sulfonate water reducing agent - Google Patents
Cement production method by adding naphthalene sulfonate water reducing agent Download PDFInfo
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- CN115466074A CN115466074A CN202211260686.9A CN202211260686A CN115466074A CN 115466074 A CN115466074 A CN 115466074A CN 202211260686 A CN202211260686 A CN 202211260686A CN 115466074 A CN115466074 A CN 115466074A
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- cement
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- reducing agent
- naphthalenesulfonic acid
- water
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- 239000004568 cement Substances 0.000 title claims abstract description 63
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- DCNHVBSAFCNMBK-UHFFFAOYSA-N naphthalene-1-sulfonic acid;hydrate Chemical compound O.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 DCNHVBSAFCNMBK-UHFFFAOYSA-N 0.000 title claims abstract description 20
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 18
- 239000011651 chromium Substances 0.000 claims abstract description 18
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000009833 condensation Methods 0.000 claims abstract description 15
- 230000005494 condensation Effects 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 238000000227 grinding Methods 0.000 claims abstract description 7
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical class O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 238000004806 packaging method and process Methods 0.000 claims abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 4
- 238000005303 weighing Methods 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 35
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 27
- KVBGVZZKJNLNJU-UHFFFAOYSA-N naphthalene-2-sulfonic acid Chemical compound C1=CC=CC2=CC(S(=O)(=O)O)=CC=C21 KVBGVZZKJNLNJU-UHFFFAOYSA-N 0.000 claims description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 230000035484 reaction time Effects 0.000 claims description 9
- 238000006277 sulfonation reaction Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000012043 crude product Substances 0.000 claims description 6
- 239000000706 filtrate Substances 0.000 claims description 6
- 239000000047 product Substances 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 claims description 3
- 235000019738 Limestone Nutrition 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 239000010440 gypsum Substances 0.000 claims description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 239000006028 limestone Substances 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 3
- 239000000243 solution Substances 0.000 claims description 3
- 229920000168 Microcrystalline cellulose Polymers 0.000 claims description 2
- 239000001506 calcium phosphate Substances 0.000 claims description 2
- 229940016286 microcrystalline cellulose Drugs 0.000 claims description 2
- 235000019813 microcrystalline cellulose Nutrition 0.000 claims description 2
- 239000008108 microcrystalline cellulose Substances 0.000 claims description 2
- 239000000276 potassium ferrocyanide Substances 0.000 claims description 2
- 235000012249 potassium ferrocyanide Nutrition 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229960001866 silicon dioxide Drugs 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 0.000 claims description 2
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims description 2
- 229940078499 tricalcium phosphate Drugs 0.000 claims description 2
- 229910000391 tricalcium phosphate Inorganic materials 0.000 claims description 2
- 235000019731 tricalcium phosphate Nutrition 0.000 claims description 2
- PSZYNBSKGUBXEH-UHFFFAOYSA-M naphthalene-1-sulfonate Chemical compound C1=CC=C2C(S(=O)(=O)[O-])=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-M 0.000 claims 5
- 238000000034 method Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 4
- PSZYNBSKGUBXEH-UHFFFAOYSA-N naphthalene-1-sulfonic acid Chemical compound C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 PSZYNBSKGUBXEH-UHFFFAOYSA-N 0.000 abstract description 2
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 8
- 239000000126 substance Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 239000002574 poison Substances 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 206010007269 Carcinogenicity Diseases 0.000 description 1
- 201000004624 Dermatitis Diseases 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 231100000260 carcinogenicity Toxicity 0.000 description 1
- 230000007670 carcinogenicity Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/16—Sulfur-containing compounds
- C04B24/20—Sulfonated aromatic compounds
- C04B24/22—Condensation or polymerisation products thereof
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/302—Water reducers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to the technical field of preparation of naphthalene sulfonic acid, and discloses a cement production method by adding a naphthalene sulfonate water reducing agent. The method comprises the steps of adding a naphthalene sulfonate formaldehyde condensation compound, sulfonated melamine formaldehyde resin and optionally a chromium removing agent into a cement mixture, grinding to obtain cement powder, weighing and packaging to obtain the cement added with the naphthalene sulfonate water reducing agent. In the cement grinding process, the naphthalene sulfonic acid formaldehyde condensation compound prepared by the microwave method and the chromium removing agent are mixed and matched for use, so that a good chromium removing effect is achieved, and the content of polluting chromium elements in a cement finished product is reduced.
Description
Technical Field
The invention belongs to the technical field of preparation of naphthalene sulfonic acid, and particularly relates to a cement production method by adding a naphthalene sulfonate water reducing agent.
Background
In the production and manufacturing process of cement, substances harmful to human bodies or the environment are introduced due to the influence of factors such as preparation processes, raw materials and the like. Hexavalent chromium or water-soluble chromium (VI) is a common harmful element contained in cement, hexavalent chromium has water solubility, belongs to a swallowable poison and a suction polar poison in the classification of harmful substances, is very obvious in damage to human bodies, can cause skin allergy when being contacted with the skin of human bodies, has carcinogenicity after being sucked into the human bodies, belongs to a first group of substances listed in the name of toxic and harmful water pollutants, and has continuous harm to the environment. Therefore, in the need of health and environmental protection, the hexavalent chromium content must be controlled in the production of cement.
In the prior art, a reducing agent method is mainly used for eliminating the influence of polluting chromium elements in cement, however, the reducing method inevitably has the problems of difficulty in realizing large-scale application, secondary pollution, poor chromium removal effect and the like.
Therefore, a cement production method by adding a naphthalene sulfonate water reducing agent is urgently needed to be provided at present, and the content of polluting chromium elements in a cement finished product is reduced.
Disclosure of Invention
The invention aims to provide a cement production method by adding a naphthalene sulfonate water reducing agent aiming at the defects of the prior art. In the cement grinding process, the naphthalenesulfonic acid-formaldehyde condensation compound prepared by the microwave method and the chromium removal agent are mixed and matched for use, so that a good chromium removal effect is achieved, and the content of polluting chromium elements in the cement finished product is reduced.
In order to achieve the purpose, the invention provides a method for producing cement added with a naphthalene sulfonate water reducing agent, which comprises the steps of adding a naphthalene sulfonate formaldehyde condensation compound, sulfonated melamine formaldehyde resin and optionally a chromium removing agent into a cement mixture, grinding to obtain cement powder, weighing and packaging to obtain the cement added with the naphthalene sulfonate water reducing agent.
According to the present invention, preferably, the cement admixture includes at least one of cement clinker, desulfurized gypsum, limestone, slag, and slag.
According to the invention, the naphthalene sulfonic acid formaldehyde condensate is preferably added in an amount of 0.5 to 2.5wt% of the cement mixture.
According to the present invention, preferably, the preparation of the sulfonic acid formaldehyde condensate comprises the steps of:
s1: mixing 98% concentrated sulfuric acid and industrial naphthalene in a sulfonation reaction kettle, reacting to obtain a beta-naphthalenesulfonic acid crude product, and discharging from the sulfonation reaction kettle;
s2: mixing the discharged crude beta-naphthalenesulfonic acid product with 3-8% sodium hydroxide aqueous solution, carrying out solid-liquid separation to obtain filtrate, cooling the filtrate to 10-15 ℃, and filtering to obtain refined beta-naphthalenesulfonic acid;
s3: feeding the refined beta-naphthalenesulfonic acid into a condensation kettle; in the condensation kettle, mixing and reacting fine beta-naphthalenesulfonic acid, water and formaldehyde to obtain a reaction material, and transferring the reaction material into microwave reaction equipment;
s4: and (3) mixing and reacting the reaction material obtained in the step (S4), liquid alkali and hydrogen peroxide in the microwave reaction equipment to obtain a naphthalenesulfonic acid-formaldehyde condensate solution, and drying to obtain the naphthalenesulfonic acid-formaldehyde condensate.
According to the invention, the ratio of the 98% concentrated sulfuric acid to the industrial naphthalene is preferably 1: (0.8-1.2); the dosage ratio of the water to the formaldehyde is (5-7): (1-1.5); the dosage ratio of the liquid caustic soda to the hydrogen peroxide is (80-100): 1.
according to the invention, preferably, the temperature of the discharged crude beta-naphthalenesulfonic acid is 90-100 ℃, the acidity value is 25-27%, and the mass concentration of the discharged crude beta-naphthalenesulfonic acid is 40% -43%.
According to the invention, the reaction in the sulfonation reaction kettle is preferably carried out at a temperature of 150 to 155 ℃ for a time of 1.5 to 2.5 hours.
According to the present invention, preferably, the reaction conditions in the condensation kettle include: the reaction temperature is 90-150 ℃, and the reaction time is 4.5-6.5h.
According to the present invention, preferably, the reaction conditions in the microwave reaction apparatus include: the reaction temperature is 120-130 ℃, the microwave parameter is 150-180W, and the reaction time is 0.5-1.5h.
According to the invention, the sulfonated melamine formaldehyde resin is preferably added in an amount of 0.25 to 0.8wt% of the cement mixture.
According to the invention, the addition amount of the chromium removing agent is preferably 0.1-0.15wt% of the cement mixture.
According to the present invention, preferably, the chromium removing agent is at least one of sodium stearate, potassium ferrocyanide, tricalcium phosphate, silicon dioxide and microcrystalline cellulose.
The technical scheme of the invention has the following beneficial effects:
1) In the cement grinding process, the naphthalenesulfonic acid-formaldehyde condensation compound prepared by the microwave method and the chromium removal agent are mixed and matched for use, so that a good chromium removal effect is achieved, and the content of polluting chromium elements in the cement finished product is reduced.
2) The method adopts a microwave method to avoid the problem of preparing the naphthalenesulfonic acid-formaldehyde condensate through a long-time reaction at a high temperature, solves the problems of high acid-base consumption, poor material flowability and the like, and has stable yield and high repeatability.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Example 1
The embodiment provides a method for producing cement by adding a naphthalene sulfonate water reducer, which comprises the steps of adding a naphthalene sulfonate formaldehyde condensate (2 wt% of a cement mixture), a sulfonated melamine formaldehyde resin (0.5 wt% of the cement mixture) and sodium stearate (0.12 wt% of the cement mixture) into the cement mixture, grinding to obtain cement powder, weighing, and packaging to obtain the cement with the naphthalene sulfonate water reducer.
The cement mixture comprises cement clinker, desulfurized gypsum and limestone, wherein the weight ratio of 1.
The preparation of the sulfonic acid formaldehyde condensate comprises the following steps:
s1: mixing 98% concentrated sulfuric acid and industrial naphthalene (1) in a sulfonation reaction kettle, reacting (at the temperature of 150 ℃ for 2 hours) to obtain a crude product of beta-naphthalene sulfonic acid, and discharging the crude product from the sulfonation reaction kettle;
the temperature of the discharged beta-naphthalenesulfonic acid crude product is 90-100 ℃, the acidity value is 25-27%, and the mass concentration of the discharged beta-naphthalenesulfonic acid crude product is 40% -43%;
s2: mixing the discharged crude beta-naphthalenesulfonic acid product with 3-8% sodium hydroxide aqueous solution, carrying out solid-liquid separation to obtain filtrate, cooling the filtrate to 10-15 ℃, and filtering to obtain refined beta-naphthalenesulfonic acid;
s3: feeding the refined beta-naphthalenesulfonic acid into a condensation kettle; in the condensation kettle, mixing and reacting refined beta-naphthalenesulfonic acid, water and formaldehyde (the dosage ratio of water to formaldehyde is 6: 1) to obtain a reaction material, and transferring the reaction material into microwave reaction equipment, wherein the reaction temperature is 120 ℃ and the reaction time is 5h;
s4: in the microwave reaction equipment, mixing and reacting the reaction material obtained in the step S4, liquid alkali and hydrogen peroxide (the dosage ratio of the liquid alkali to the hydrogen peroxide is 90: 1) (the reaction temperature is 120 ℃, the microwave parameter is 160W, and the reaction time is 1 h) to obtain a naphthalene sulfonic acid formaldehyde condensate solution, and drying to obtain the naphthalene sulfonic acid formaldehyde condensate.
Example 2
The embodiment provides a cement production method by adding a naphthalene sulfonate water reducing agent, and the difference between the embodiment and the embodiment 1 is only that: the reaction conditions in the microwave reaction equipment comprise: the reaction temperature is 125 ℃, the microwave parameter is 180W, and the reaction time is 0.5h.
Example 3
The embodiment provides a cement production method by adding a naphthalene sulfonate water reducing agent, and the difference between the embodiment and the embodiment 1 is only that: the reaction conditions in the condensation kettle include: the reaction temperature is 90 ℃, and the reaction time is 6h.
Test example
The water-soluble chromium (VI) content test is carried out on the cement produced by the cement production method with the naphthalene sulfonate water reducing agent. The test method is carried out according to the specific requirements of GB 31893-2015 limit and determination method for water-soluble chromium (VI) in cement, a sample is prepared by mixing 450g of cement, 1350g of Chinese ISO standard sand and 225mL of water, the test times are specified to be two times, and the determination result is represented by the average value of the two test results. The test results of the content of the water-soluble chromium (VI) in the cement of the invention are shown in Table 1.
TABLE 1
| Soluble chromium (VI) content (mg/kg) | |
| Example 1 | 6.75 |
| Example 2 | 5.43 |
| Example 3 | 5.96 |
While embodiments of the present invention have been described above, the above description is illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. The method for producing the cement added with the naphthalene sulfonate water reducing agent is characterized by comprising the steps of adding a naphthalene sulfonate formaldehyde condensation compound, sulfonated melamine formaldehyde resin and optionally a chromium removing agent into a cement mixture, grinding to obtain cement powder, weighing and packaging to obtain the cement added with the naphthalene sulfonate water reducing agent.
2. The method for producing cement with an added naphthalenesulfonate water reducer as claimed in claim 1, wherein the cement admixture includes at least one of cement clinker, desulfurized gypsum, limestone, slag, and slag.
3. The method for producing cement by adding a naphthalenesulfonate water-reducing agent according to claim 1, wherein the addition amount of the naphthalenesulfonate formaldehyde condensate is 0.5-2.5wt% of the cement mixture.
4. The method for producing cement with an added naphthalenesulfonate water reducer as claimed in claim 1 or 3, wherein the preparation of the sulfonic acid formaldehyde condensate comprises the steps of:
s1: mixing 98% concentrated sulfuric acid and industrial naphthalene in a sulfonation reaction kettle, reacting to obtain a beta-naphthalenesulfonic acid crude product, and discharging from the sulfonation reaction kettle;
s2: mixing the discharged crude beta-naphthalenesulfonic acid product with 3-8% sodium hydroxide aqueous solution, carrying out solid-liquid separation to obtain filtrate, cooling the filtrate to 10-15 ℃, and filtering to obtain refined beta-naphthalenesulfonic acid;
s3: feeding the refined beta-naphthalenesulfonic acid into a condensation kettle; in the condensation kettle, fine beta-naphthalenesulfonic acid, water and formaldehyde are mixed and reacted to obtain a reaction material, and the reaction material is transferred into microwave reaction equipment;
s4: and (3) mixing and reacting the reaction material obtained in the step (S4), liquid alkali and hydrogen peroxide in the microwave reaction equipment to obtain a naphthalenesulfonic acid-formaldehyde condensate solution, and drying to obtain the naphthalenesulfonic acid-formaldehyde condensate.
5. The method for producing cement with addition of a naphthalenesulfonate water-reducing agent in accordance with claim 4, wherein,
the dosage ratio of the 98% concentrated sulfuric acid to the industrial naphthalene is 1: (0.8-1.2);
the dosage ratio of the water to the formaldehyde is (5-7): (1-1.5);
the dosage ratio of the liquid caustic soda to the hydrogen peroxide is (80-100): 1.
6. the method for producing cement by adding a naphthalenesulfonate water-reducer according to claim 4, wherein the temperature of the discharged crude β -naphthalenesulfonic acid is 90-100 ℃, the acidity value is 25-27%, and the mass concentration of the discharged crude β -naphthalenesulfonic acid is 40% -43%.
7. The method for producing cement with addition of a naphthalenesulfonate water-reducing agent in accordance with claim 4, wherein,
the reaction temperature in the sulfonation reaction kettle is 150-155 ℃, and the reaction time is 1.5-2.5h;
the reaction conditions in the condensation kettle include: the reaction temperature is 90-150 ℃, and the reaction time is 4.5-6.5h;
the reaction conditions in the microwave reaction equipment comprise: the reaction temperature is 120-130 ℃, the microwave parameter is 150-180W, and the reaction time is 0.5-1.5h.
8. The method for producing cement by adding naphthalene sulfonate water reducer as claimed in claim 1, wherein the addition amount of sulfonated melamine formaldehyde resin is 0.25-0.8wt% of the cement mixture.
9. The method for producing cement by adding naphthalenesulfonate water-reducing agent according to claim 1, wherein the addition amount of chromium-removing agent is 0.1-0.15wt% of the cement mixture.
10. The method for producing cement with an addition of a naphthalene sulfonate water reducer of claim 9, wherein said chromium removing agent is at least one of sodium stearate, potassium ferrocyanide, tricalcium phosphate, silicon dioxide and microcrystalline cellulose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211260686.9A CN115466074A (en) | 2022-10-14 | 2022-10-14 | Cement production method by adding naphthalene sulfonate water reducing agent |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211260686.9A CN115466074A (en) | 2022-10-14 | 2022-10-14 | Cement production method by adding naphthalene sulfonate water reducing agent |
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| CN115466074A true CN115466074A (en) | 2022-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211260686.9A Pending CN115466074A (en) | 2022-10-14 | 2022-10-14 | Cement production method by adding naphthalene sulfonate water reducing agent |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070495A (en) * | 2010-11-11 | 2011-05-25 | 吉化集团吉林市星云工贸有限公司 | Method for preparing naphthalene sulfonic acid-formaldehyde condensate |
| CN107674005A (en) * | 2017-08-24 | 2018-02-09 | 南通双狮化工有限公司 | A kind of preparation method of high-concentration naphthalene sulfonic acid formaldehyde condensation products |
| CN107739320A (en) * | 2017-08-24 | 2018-02-27 | 南通双狮化工有限公司 | A kind of preparation method of naphthalene sulfonic acid-formaldehyde condensation product |
| CN109382055A (en) * | 2018-12-13 | 2019-02-26 | 山东万山化工有限公司 | The device and reaction method of sulfonating reaction efficiency in a kind of raising naphthalene series high-efficiency water-reducing agent |
| CN112174858A (en) * | 2020-09-28 | 2021-01-05 | 安徽生源化工有限公司 | Beta-naphthalenesulfonic acid and refining method, filtrate and application thereof |
| CN113912317A (en) * | 2021-11-12 | 2022-01-11 | 湖南先锋防水科技有限公司 | Cement production method by adding naphthalene sulfonate water reducing agent |
-
2022
- 2022-10-14 CN CN202211260686.9A patent/CN115466074A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070495A (en) * | 2010-11-11 | 2011-05-25 | 吉化集团吉林市星云工贸有限公司 | Method for preparing naphthalene sulfonic acid-formaldehyde condensate |
| CN107674005A (en) * | 2017-08-24 | 2018-02-09 | 南通双狮化工有限公司 | A kind of preparation method of high-concentration naphthalene sulfonic acid formaldehyde condensation products |
| CN107739320A (en) * | 2017-08-24 | 2018-02-27 | 南通双狮化工有限公司 | A kind of preparation method of naphthalene sulfonic acid-formaldehyde condensation product |
| CN109382055A (en) * | 2018-12-13 | 2019-02-26 | 山东万山化工有限公司 | The device and reaction method of sulfonating reaction efficiency in a kind of raising naphthalene series high-efficiency water-reducing agent |
| CN112174858A (en) * | 2020-09-28 | 2021-01-05 | 安徽生源化工有限公司 | Beta-naphthalenesulfonic acid and refining method, filtrate and application thereof |
| CN113912317A (en) * | 2021-11-12 | 2022-01-11 | 湖南先锋防水科技有限公司 | Cement production method by adding naphthalene sulfonate water reducing agent |
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Application publication date: 20221213 |