CN109550282B - High-temperature-resistant integral power plant desulfurization defoaming agent and preparation method thereof - Google Patents
High-temperature-resistant integral power plant desulfurization defoaming agent and preparation method thereof Download PDFInfo
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- 239000002518 antifoaming agent Substances 0.000 title claims abstract description 51
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 33
- 230000023556 desulfurization Effects 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 81
- 229920000570 polyether Polymers 0.000 claims abstract description 81
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 47
- 239000001257 hydrogen Substances 0.000 claims abstract description 47
- 229920002545 silicone oil Polymers 0.000 claims abstract description 44
- -1 polymethylsiloxane Polymers 0.000 claims abstract description 39
- 229920005862 polyol Polymers 0.000 claims abstract description 38
- 150000003077 polyols Chemical class 0.000 claims abstract description 38
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims abstract description 37
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 32
- 239000000194 fatty acid Substances 0.000 claims abstract description 32
- 229930195729 fatty acid Natural products 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 26
- 239000000376 reactant Substances 0.000 claims abstract description 26
- 239000000126 substance Substances 0.000 claims abstract description 21
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 19
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims abstract description 14
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 11
- 239000000839 emulsion Substances 0.000 claims abstract description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 9
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 150000002431 hydrogen Chemical class 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 31
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 23
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 19
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 18
- 239000007788 liquid Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- UMHYVXGZRGOICM-AUYXYSRISA-N 2-[(z)-octadec-9-enoyl]oxypropyl (z)-octadec-9-enoate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(C)OC(=O)CCCCCCC\C=C/CCCCCCCC UMHYVXGZRGOICM-AUYXYSRISA-N 0.000 claims description 13
- 229940010310 propylene glycol dioleate Drugs 0.000 claims description 13
- 239000003054 catalyst Substances 0.000 claims description 11
- 229910052697 platinum Inorganic materials 0.000 claims description 11
- 229920000136 polysorbate Polymers 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 10
- 239000003377 acid catalyst Substances 0.000 claims description 9
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 5
- 239000013530 defoamer Substances 0.000 claims description 5
- NOPFSRXAKWQILS-UHFFFAOYSA-N docosan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCCCCCO NOPFSRXAKWQILS-UHFFFAOYSA-N 0.000 claims description 4
- GLDOVTGHNKAZLK-UHFFFAOYSA-N octadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 claims description 4
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 3
- 229920000053 polysorbate 80 Polymers 0.000 claims description 3
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 2
- 229960000735 docosanol Drugs 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims description 2
- 239000006260 foam Substances 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 8
- 230000005764 inhibitory process Effects 0.000 abstract description 5
- 235000021355 Stearic acid Nutrition 0.000 description 14
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 14
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 14
- 239000008117 stearic acid Substances 0.000 description 14
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 14
- 238000010521 absorption reaction Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 230000006837 decompression Effects 0.000 description 7
- 238000009835 boiling Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 239000003921 oil Substances 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000001804 emulsifying effect Effects 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910021645 metal ion Inorganic materials 0.000 description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012875 nonionic emulsifier Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 231100000957 no side effect Toxicity 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
- Silicon Polymers (AREA)
Abstract
The invention provides a high-temperature-resistant bulk power plant desulfurization defoaming agent, which is an emulsion prepared by mixing after step-by-step reaction, and comprises the following components in parts by weight: 50-80 parts of polyether polyol and fatty acid esterified substance reactant; 10-25 parts of low hydrogen silicone oil and allyl polyether addition compound; 1-5 parts of higher alcohol; 2-10 parts of an emulsifier; 1-3 parts of lauryl polymethylsiloxane. The preparation method of the high-temperature resistant bulk power plant desulfurization defoaming agent comprises the following steps: s1: reacting to prepare polyether polyol and fatty acid esterified reactant; s2: reacting to prepare an addition product of low-hydrogen silicone oil and allyl polyether; s3: and mixing to prepare the high-temperature-resistant bulk power plant desulfurization defoaming agent. The invention aims to provide a high-temperature resistant integral power plant desulfurization defoaming agent with higher defoaming speed, longer foam inhibition time and better effect and a preparation method thereof.
Description
Technical Field
The invention relates to the technical field of defoaming agents, and particularly relates to a high-temperature resistant integral power plant desulfurization defoaming agent and a preparation method thereof.
Background
Due to the reasons of history, policy, technology, resources and the like, the thermal power generation in China exceeds more than 60%. Along with environmental protection factors, for better human living environment, the sulfur-containing flue gas of pollutants caused by fire coal in thermal power generation needs to be subjected to desulfurization treatment. And the desulfurizer that present power plant desulfurization was handled and is mainly adopted is the lime stone thick liquid, and at the desulfurization in-process, thick liquid can be because of flue gas dust in the flue gas absorption tower, oil content in the flue gas, the burning is not abundant, and metal ion in the thick liquid, factors such as quality of water cause the foam, and the foam not only influences the absorption rate of absorption tower, and can lead to the liquid level inaccurate, overflow scheduling problem. In order to reduce and eliminate foam and ensure the normal operation of the desulfurization device, a common mode is to pump a defoaming agent into the absorption tower.
The common desulfurization defoaming agent in the market is polyether type and organic silicon emulsion type. The polyether type generally selects a polyol polyether defoaming agent which has good thermal stability, resists compression and shearing, exists in the slurry in a molecular form after being added, changes the surface tension of the slurry to inhibit the generation of foam, and can not quickly eliminate the foam generated on the surface of the slurry; the organosilicon emulsion type utilizes the characteristic of lower surface tension of organosilicon, and can quickly disperse and eliminate foam on the surface of slurry after emulsification. The disadvantage is that the foam can not be continuously removed for a long time in acid and alkali environment.
Aiming at the defects of the existing defoaming agent, a defoaming agent with higher defoaming speed and longer foam inhibition time is urgently needed to be researched.
Disclosure of Invention
The invention aims to provide a high-temperature resistant integral power plant desulfurization defoaming agent with higher defoaming speed, longer foam inhibition time and better effect and a preparation method thereof.
The technical purpose of the invention is realized by the following technical scheme: a high-temperature-resistant bulk power plant desulfurization defoaming agent is an emulsion prepared by mixing after step-by-step reaction, and comprises the following components in parts by weight:
by adopting the technical scheme, the high-temperature-resistant bulk power plant desulfurization defoaming agent comprises polyether polyol and fatty acid ester compound reactant, low-hydrogen-content silicone oil and allyl polyether adduct, high-carbon alcohol and an emulsifier, and the invention aims to solve the problem that in the power plant desulfurization process, desulfurizer limestone slurry generates foam due to smoke dust, metal ions, water quality and the like, and the absorption rate of a subsequent absorption tower is influenced. The polyether polyol can be used as a nonionic emulsifier for emulsifying organic silicone oil to reduce the dosage of the emulsifier and increase the emulsion stability, and in addition, the polyether has a cloud point, and shows a defoaming effect at a temperature higher than the cloud point, so that the prepared defoaming agent has better defoaming and foam inhibiting effects at a high temperature.
As a further improvement of the invention, the silicone rubber also comprises 10 to 15 parts of polydiethylsiloxane by weight.
As a further improvement of the invention, the paint also comprises 2 to 5 parts of propylene glycol dioleate by weight.
As a further improvement of the invention, the higher alcohol is any one or a mixture of more than one of hexadecanol, octadecanol and docosanol.
As a further improvement of the invention, the emulsifier is any one or a mixture of more than one of Tween 60, Tween 80, Tween 81 and Tween 85.
The invention also provides a preparation method of the high-temperature-resistant bulk power plant desulfurization defoaming agent, which is characterized by comprising the following steps of: the method comprises the following steps:
s1: taking 60-95 parts of polyether polyol, 5-40 parts of fatty acid and 0.2-1.0 part of acid catalyst, stirring in a kettle, keeping the temperature at 130-;
s2: taking low-hydrogen-content silicone oil and allyl polyether, stirring and heating to 80-120 ℃ in a molar ratio of 1:1.2, and adding 5-20ppm platinum catalyst isopropanol or platinum catalyst glycol solution after vacuum pumping of water contained in the raw materials. After the reaction is transparent, keeping the temperature for 3 hours, and cooling to obtain the low-hydrogen silicone oil and allyl polyether addition compound;
s3: taking a reactant of polyether polyol and fatty acid ester, an adduct of low hydrogen silicone oil and allyl polyether, an emulsifier, high alcohol, polydiethylsiloxane, lauryl polymethylsiloxane and propylene glycol dioleate; the temperature is raised to 70 ℃, the mixture is rapidly and evenly stirred, the mixture is cooled and then dispersed for 10 to 40 minutes by a high-speed dispersion machine under the conditions of 10000 plus materials at 50000r/min to obtain uniform and stable liquid, namely the high-temperature resistant bulk power plant desulfurization defoaming agent.
As a further improvement of the invention, the polyether polyol in step S1 is one or a mixture of L61, L62, PPG600, PPG1000 and GPE.
As a further improvement of the invention, the low hydrogen-containing silicone oil in step S2 is a hydrogen-containing silicone oil with a hydrogen content of 0.08% -0.20%.
As a further improvement of the invention, the raw material components and parts by weight of the reactants in the step S3 are: 50-80 parts of polyether polyol and fatty acid ester reactant, 10-25 parts of low hydrogen-containing silicone oil and allyl polyether adduct, 2-10 parts of emulsifier, 1-5 parts of higher alcohol, 10-15 parts of polydiethylsiloxane, 1-3 parts of lauryl polymethylsiloxane and 2-5 parts of propylene glycol dioleate.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention aims to solve the problem that in the desulfurization process of a power plant, foam is generated in limestone slurry of a desulfurizing agent due to smoke dust, metal ions, water quality and the like to influence the absorption rate of a subsequent absorption tower. The polyether polyol can be used as a nonionic emulsifier for emulsifying organic silicone oil to reduce the dosage of the emulsifier and increase the emulsion stability, and in addition, the polyether has a cloud point, and shows a defoaming effect at a temperature higher than the cloud point, so that the prepared defoaming agent has better defoaming and foam inhibiting effects at a high temperature.
2. The invention adopts the lauryl polymethylsiloxane with a branched chain, the viscosity is reduced along with the increase of the shearing force, the dispersibility is increased, the defoaming activity of the low-hydrogen silicone oil is promoted, the defoaming agent presents excellent defoaming property, and under the condition of high temperature, the lauryl polymethylsiloxane can improve the chemical stability of the reactant of polyether polyol and fatty acid ester and the adduct of the low-hydrogen silicone oil and allyl polyether, and improve the defoaming durability of the defoaming agent.
3. The poly-diethylsiloxane adopted by the invention can improve the self-emulsifying property and the high temperature resistance, can be compounded with the low hydrogen-containing silicone oil and the allyl polyether addition compound, improves the emulsifying degree of the low hydrogen-containing silicone oil and the allyl polyether addition compound, enables the emulsion to be more exquisite and stable, improves the stability of the defoaming agent under the high temperature condition, and simultaneously expands the application range of the emulsion.
4. The invention adopts the propylene glycol dioleate which has early stage defoaming effect, has good defoaming capability on tiny and difficultly-eliminated bubbles and high defoaming speed, and greatly improves the comprehensive performance of the product by matching with the foam inhibition function of the low-hydrogen silicone oil and allyl polyether adduct and the polyether polyol and fatty acid esterified substance reactant.
5. The defoaming agent has good stability, fully utilizes the low surface tension and chemical stability of polyether esterified substance and silicon polyether, and has no side effect on a foaming system.
6. The product of the invention has less adding amount in use and excellent performance, can be compared favorably with imported products, and has obvious advantage in price compared with the imported products.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
The invention discloses a high-temperature resistant integral power plant desulfurization defoaming agent and a preparation method thereof, and the specific implementation mode is as follows.
Example 1
S1: taking 16.7g of polyether polyol L61100g and L62100g as fatty acid stearic acid in a 500ml three-neck flask, gradually heating to 70 ℃ until the stearic acid is completely dissolved, adding 0.67g of p-toluenesulfonic acid as an acid catalyst, stirring in a kettle, keeping the temperature at 130 ℃ and 160 ℃ for reaction for 4-8h, and removing water obtained by the reaction under reduced pressure to obtain a reactant of the polyether polyol and a fatty acid esterified substance;
s2: taking 100g of low-hydrogen silicone oil with the hydrogen content of 0.08 percent and 30g of allyl polyether with the molecular weight of 350 into a 250ml three-neck flask, stirring and heating to 80 ℃, after moisture contained in the raw materials is extracted in vacuum, adding 5ppm of platinum catalyst isopropanol, heating to 130 ℃, after the materials are transparent through turbid reaction, preserving heat for 3 hours, removing low-boiling-point substances through decompression, and naturally cooling to obtain an addition product of the low-hydrogen silicone oil and the allyl polyether;
s3: taking 200g of polyether polyol and fatty acid ester reactant, 40g of low hydrogen-containing silicone oil and allyl polyether adduct, 608g of tween, 4g of hexadecanol, 40g of polydiethylsiloxane, 4g of lauryl polymethylsiloxane and 8g of propylene glycol dioleate, heating to 70 ℃ in a 250ml three-neck flask, and dispersing for 30 minutes under the condition of 10000r/min by a high-speed dispersion machine to obtain uniform and stable liquid, namely the bulk power plant desulfurization defoaming agent.
Example 2
S1: taking 84.2g of stearic acid as polyether polyol PPG600100g and PPG1000100g in a 500ml three-neck flask, gradually heating to 70 ℃ until the stearic acid is completely dissolved, adding 2.1g of p-toluenesulfonic acid as an acid catalyst, stirring in a kettle, keeping the temperature at 130 ℃ and 160 ℃ for reaction for 4-8h, and removing water obtained by the reaction under reduced pressure to obtain a reactant of the polyether polyol and a fatty acid esterified substance;
s2: taking 100g of low-hydrogen silicone oil with the hydrogen content of 0.2 percent and 30g of allyl polyether with the molecular weight of 350 into a 250ml three-neck flask, stirring and heating to 120 ℃, adding 20ppm of platinum catalyst isopropanol after moisture contained in the raw materials is extracted in vacuum, heating to 130 ℃, keeping the temperature for 3 hours after the materials are transparent through turbid reaction, removing low-boiling point substances through decompression, and naturally cooling to obtain an addition product of the low-hydrogen silicone oil and the allyl polyether;
s3: taking 200g of polyether polyol and fatty acid ester reactant, 100g of low hydrogen-containing silicone oil and allyl polyether adduct, 25g of tween 80 and tween 81, 12.5g of hexadecanol, 37.5g of polydiethylsiloxane, 7.5g of lauryl polymethylsiloxane and 12.5g of propylene glycol dioleate, heating to 70 ℃ in a 250ml three-neck flask, and dispersing for 30 minutes under the condition of 10000r/min by a high-speed dispersing machine to obtain uniform and stable liquid, namely the bulk power plant desulfurization defoaming agent.
Example 3
S1: taking polyether polyol GPE200g, putting 57.1g of stearic acid as fatty acid in a 500ml three-neck flask, gradually heating to 70 ℃ until the stearic acid is completely dissolved, adding 1.43g of p-toluenesulfonic acid as an acid catalyst, stirring in a kettle, keeping the temperature at 130 ℃ and 160 ℃ for reaction for 4-8h, and removing water obtained by reaction under reduced pressure to obtain a reactant of the polyether polyol and the fatty acid esterified substance;
s2: taking 100g of low-hydrogen silicone oil with the hydrogen content of 0.1 percent and 30g of allyl polyether with the molecular weight of 350 into a 250ml three-neck flask, stirring and heating to 100 ℃, after the moisture contained in the raw material is extracted in vacuum, adding 10ppm of platinum catalyst isopropanol, heating to 130 ℃, after the material is transparent through turbid reaction, preserving heat for 3 hours, removing low-boiling point substances through decompression, and naturally cooling to obtain an addition product of the low-hydrogen silicone oil and the allyl polyether;
s3: taking 200g of polyether polyol and fatty acid ester reactant, 52.6g of low hydrogen-containing silicone oil and allyl polyether adduct, 8524.6g of tween, 9.23g of hexadecanol, 36.92g of polydiethylsiloxane, 6.15g of lauryl polymethylsiloxane and 9.23g of propylene glycol dioleate, heating to 70 ℃ in a 250ml three-neck flask, and dispersing for 30 minutes under the condition of 10000r/min by a high-speed dispersion machine to obtain uniform and stable liquid, namely the bulk power plant desulfurization defoaming agent.
Example 4
S1: taking polyether polyol GPE200g, putting 57.1g of stearic acid as fatty acid in a 500ml three-neck flask, gradually heating to 70 ℃ until the stearic acid is completely dissolved, adding 1.43g of p-toluenesulfonic acid as an acid catalyst, stirring in a kettle, keeping the temperature at 130 ℃ and 160 ℃ for reaction for 4-8h, and removing water obtained by reaction under reduced pressure to obtain a reactant of the polyether polyol and the fatty acid esterified substance;
s2: taking 100g of low-hydrogen silicone oil with the hydrogen content of 0.1 percent and 30g of allyl polyether with the molecular weight of 350 into a 250ml three-neck flask, stirring and heating to 100 ℃, after the moisture contained in the raw material is extracted in vacuum, adding 10ppm of platinum catalyst isopropanol, heating to 130 ℃, after the material is transparent through turbid reaction, preserving heat for 3 hours, removing low-boiling point substances through decompression, and naturally cooling to obtain an addition product of the low-hydrogen silicone oil and the allyl polyether;
s3: taking 200g of polyether polyol and fatty acid ester reactant, 52.6g of low hydrogen-containing silicone oil and allyl polyether adduct, 8524.6g of tween, 9.23g of hexadecanol and 36.92g of polydiethylsiloxane in a 250ml three-neck flask, heating to 70 ℃, and dispersing for 30 minutes under the condition of 10000r/min by a high-speed dispersion machine to obtain uniform and stable liquid, namely the bulk power plant desulfurization defoaming agent.
Example 5
S1: taking polyether polyol GPE200g, putting 57.1g of stearic acid as fatty acid in a 500ml three-neck flask, gradually heating to 70 ℃ until the stearic acid is completely dissolved, adding 1.43g of p-toluenesulfonic acid as an acid catalyst, stirring in a kettle, keeping the temperature at 130 ℃ and 160 ℃ for reaction for 4-8h, and removing water obtained by reaction under reduced pressure to obtain a reactant of the polyether polyol and the fatty acid esterified substance;
s2: taking 100g of low-hydrogen silicone oil with the hydrogen content of 0.1 percent and 30g of allyl polyether with the molecular weight of 350 into a 250ml three-neck flask, stirring and heating to 100 ℃, after the moisture contained in the raw material is extracted in vacuum, adding 10ppm of platinum catalyst isopropanol, heating to 130 ℃, after the material is transparent through turbid reaction, preserving heat for 3 hours, removing low-boiling point substances through decompression, and naturally cooling to obtain an addition product of the low-hydrogen silicone oil and the allyl polyether;
s3: taking 200g of polyether polyol and fatty acid ester reactant, 52.6g of low hydrogen-containing silicone oil and allyl polyether adduct, 8524.6g of tween, 9.23g of hexadecanol and 6.15g of lauryl polymethylsiloxane, heating the mixture to 70 ℃ in a 250ml three-neck flask, and dispersing the mixture for 30 minutes under the condition of 10000r/min by a high-speed dispersion machine to obtain uniform and stable liquid, namely the bulk power plant desulfurization defoaming agent.
Example 6
S1: taking polyether polyol GPE200g, putting 57.1g of stearic acid as fatty acid in a 500ml three-neck flask, gradually heating to 70 ℃ until the stearic acid is completely dissolved, adding 1.43g of p-toluenesulfonic acid as an acid catalyst, stirring in a kettle, keeping the temperature at 130 ℃ and 160 ℃ for reaction for 4-8h, and removing water obtained by reaction under reduced pressure to obtain a reactant of the polyether polyol and the fatty acid esterified substance;
s2: taking 100g of low-hydrogen silicone oil with the hydrogen content of 0.1 percent and 30g of allyl polyether with the molecular weight of 350 into a 250ml three-neck flask, stirring and heating to 100 ℃, after the moisture contained in the raw material is extracted in vacuum, adding 10ppm of platinum catalyst isopropanol, heating to 130 ℃, after the material is transparent through turbid reaction, preserving heat for 3 hours, removing low-boiling point substances through decompression, and naturally cooling to obtain an addition product of the low-hydrogen silicone oil and the allyl polyether;
s3: taking 200g of polyether polyol and fatty acid ester reactant, 52.6g of low hydrogen silicone oil and allyl polyether adduct, 8524.6g of tween, 9.23g of hexadecanol and 9.23g of propylene glycol dioleate, heating the mixture to 70 ℃ in a 250ml three-neck flask, and dispersing the mixture for 30 minutes by a high-speed dispersion machine under the condition of 10000r/min to prepare uniform and stable liquid, namely the bulk power plant desulfurization defoaming agent.
Comparative example 1
S1: taking polyether polyol GPE200g, putting 57.1g of stearic acid as fatty acid in a 500ml three-neck flask, gradually heating to 70 ℃ until the stearic acid is completely dissolved, adding 1.43g of p-toluenesulfonic acid as an acid catalyst, stirring in a kettle, keeping the temperature at 130 ℃ and 160 ℃ for reaction for 4-8h, and removing water obtained by reaction under reduced pressure to obtain a reactant of the polyether polyol and the fatty acid esterified substance;
s2: taking 100g of low-hydrogen silicone oil with the hydrogen content of 0.1 percent and 30g of allyl polyether with the molecular weight of 350 into a 250ml three-neck flask, stirring and heating to 100 ℃, after the moisture contained in the raw material is extracted in vacuum, adding 10ppm of platinum catalyst isopropanol, heating to 130 ℃, after the material is transparent through turbid reaction, preserving heat for 3 hours, removing low-boiling point substances through decompression, and naturally cooling to obtain an addition product of the low-hydrogen silicone oil and the allyl polyether;
s3: taking 200g of polyether polyol and fatty acid ester reactant, 52.6g of low hydrogen-containing silicone oil and allyl polyether adduct, 8524.6g of tween and 9.23g of hexadecanol, heating the mixture to 70 ℃ in a 250ml three-neck flask, and dispersing the mixture for 30 minutes by a high-speed dispersion machine under the condition of 10000r/min to obtain uniform and stable liquid, namely the bulk power plant desulfurization defoaming agent.
The defoamer performance was determined for the defoamer test samples of examples 1-3 and comparative example 1 according to the following test criteria:
1. determination of centrifugal stability
And (3) taking 7mL of the defoaming agent into a centrifugal test tube, centrifuging for 30min in a high-speed centrifuge with the rotating speed of 3000r/min, taking out and observing whether oil is floated or layered, wherein the defoaming agent is stable if the oil is not floated or layered, and the defoaming agent is unstable if the layering or oil floating phenomenon occurs.
2. Measurement of dispersibility in Water
A small amount of the antifoaming agent is added into a test tube filled with purified water, the test tube is gently shaken, and the dispersion condition of the antifoaming agent emulsion in water is observed (rapid diffusion is 'excellent'; dispersion is realized, a small amount of floccule which is difficult to disperse on the liquid surface is shown as 'middle'; the floccule is difficult to disperse, and the floccule is difficult to disappear as 'poor').
3. Measurement of defoaming Properties
Adding 30mL of sodium dodecyl benzene sulfonate aqueous solution with the mass fraction of 4% into a 150mL measuring cylinder as foaming liquid, and introducing N into a connecting pipe2When the flow rate was adjusted to about 3L/min for bubbling and the foam height reached 100mL, 0.025mL of the defoaming agent was added, and then the time taken for the disappearance of the foam was quickly recorded by a stopwatch, and the shorter the time, the better the defoaming effect of the defoaming agent was.
4. Measurement of foam suppressing Property
100mL of sodium dodecyl benzene sulfonate aqueous solution with the mass fraction of 4% and 0.05mL of defoaming agent are added into a 150mL measuring cylinder, and N is introduced into a connecting pipe2The bubbling was carried out at a flow rate of about 3L/min, and then the time taken for the occurrence of foam was rapidly recorded by a stopwatch, and this time was recorded as the foam suppressing time, and the longer the time, the better the foam suppressing effect of the defoaming agent was.
5. Determination of high temperature resistance
A test tube (marked with 100mL in advance) filled with foaming liquid (4 mass percent of sodium dodecyl benzene sulfonate aqueous solution) is placed in an oil bath pot, heated to the temperature of 30 ℃, 50 ℃, 80 ℃ and 100 ℃, and then the defoaming time and the foam inhibition time of the defoaming agent are measured by the methods in the 3 rd section and the 4 th section at different temperatures.
The results of the test performance of the defoaming agent are shown in tables 1 to 2 below.
TABLE 1 different performance tests on different samples
TABLE 2 defoaming and foam suppressing Properties at different temperatures
Examples 1, 2 and 3 show the results of the tests by changing the amount of the formulation, and examples 4 to 6 show the tendency of improving the defoaming performance and foam suppressing performance of the defoaming agent by changing the amount of the added substance within a certain range, as can be seen from table 1 above, the performances of examples 1 to 3 are better than those of comparative example 1, and the addition of polydiethylsiloxane, lauryl polymethylsiloxane and propylene glycol dioleate can improve the defoaming and foam suppressing performance of the defoaming agent, and can improve the water dispersibility of the defoaming agent and significantly improve the stability of the defoaming agent.
It can be understood from Table 2 that as the outside temperature increases, the defoaming time is slightly prolonged and the foam suppressing time is also slightly shortened, but the defoaming performance and the foam suppressing performance in examples 1 to 3 are better than those in comparative example 1 with respect to temperature, particularly high temperature resistance, and the defoaming performance and the foam suppressing performance in examples 1 to 3 are still excellent at 100 ℃, so that the polydiethylsiloxane, lauryl polymethylsiloxane and propylene glycol dioleate in the present invention synergistically improve the high temperature stability of the defoaming agent.
The high-temperature resistant integral power plant desulfurization defoamer and the preparation method thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (3)
1. The utility model provides a high temperature resistant body type power plant desulfurization defoaming agent which characterized in that: the emulsion is prepared by mixing after step-by-step reaction, and comprises the following components in parts by weight:
50-80 parts of polyether polyol and fatty acid esterified substance reactant;
10-25 parts of low-hydrogen silicone oil and allyl polyether addition compound;
1-5 parts of higher alcohol;
2-10 parts of an emulsifier;
1-3 parts of lauryl polymethylsiloxane;
10-15 parts of polydiethylsiloxane;
2-5 parts of propylene glycol dioleate;
the high-temperature-resistant bulk power plant desulfurization defoaming agent is prepared by the following steps:
s1: taking 60-95 parts of polyether polyol, 5-40 parts of fatty acid and 0.2-1.0 part of acid catalyst, stirring in a kettle, keeping the temperature at 130-;
s2: taking low-hydrogen-content silicone oil and allyl polyether, stirring and heating to 80-120 ℃ in a molar ratio of 1:1.2, adding 5-20ppm platinum catalyst isopropanol or platinum catalyst ethylene glycol solution after vacuum pumping of water contained in the raw materials, keeping the temperature for 3 hours after the reaction is transparent, and cooling to obtain an adduct of the low-hydrogen-content silicone oil and the allyl polyether;
s3: taking a reactant of polyether polyol and fatty acid ester, an adduct of low hydrogen silicone oil and allyl polyether, an emulsifier, high alcohol, polydiethylsiloxane, lauryl polymethylsiloxane and propylene glycol dioleate; heating to 70 ℃, rapidly stirring uniformly, cooling, and then dispersing at high speed for 30 minutes by a high-speed dispersion machine under the conditions of 10000 plus materials at 50000r/min to obtain uniform and stable liquid, namely the high-temperature resistant bulk power plant desulfurization defoaming agent;
in the step S1, the polyether polyol is one or a mixture of L61, L62, PPG600, PPG1000 and GPE;
the low hydrogen-containing silicone oil in the step S2 is hydrogen-containing silicone oil with the hydrogen content of 0.08-0.20%;
the raw material components and the parts by weight of the reactants in the step S3 are as follows: 50-80 parts of polyether polyol and fatty acid ester reactant, 10-25 parts of low hydrogen-containing silicone oil and allyl polyether adduct, 2-10 parts of emulsifier, 1-5 parts of higher alcohol, 10-15 parts of polydiethylsiloxane, 1-3 parts of lauryl polymethylsiloxane and 2-5 parts of propylene glycol dioleate.
2. The high temperature resistant bulk power plant desulfurization defoamer of claim 1, wherein: the higher alcohol is any one or mixture of more than one of hexadecanol, octadecanol and docosanol.
3. The high temperature resistant bulk power plant desulfurization defoamer of claim 1, wherein: the emulsifier is any one or a mixture of more than one of Tween 60, Tween 80, Tween 81 and Tween 85.
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| CN103819630A (en) * | 2014-03-05 | 2014-05-28 | 威尔（福建）生物有限公司 | Polyether modified organic silicon defoamer, and preparation method and application thereof |
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