CN103276403B - A kind of method preparing long-chain alkyl ammonium hydroxide - Google Patents
A kind of method preparing long-chain alkyl ammonium hydroxide Download PDFInfo
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Abstract
A kind of method preparing long-chain alkyl ammonium hydroxide adopts to obtain chain alkyl carbonic acid first ammonium by tertiary amine and dimethyl carbonate, chain alkyl carbonic acid first ammonium obtains chain alkyl bicarbonate of ammonia through hydrolysis, the corresponding long-chain alkyl ammonium hydroxide of chain alkyl bicarbonate of ammonia electrolytic preparation, can obtain the long-chain alkyl ammonium hydroxide that purity is higher.The present invention has pollution-free, low cost, the advantage that purity is high.
Description
Technical field
The invention belongs to a kind of method preparing alkyl ammonium hydroxide, be specifically related to a kind of method preparing long-chain alkyl ammonium hydroxide.
Technical background
Tetra-alkyl ammonium hydroxide is the organic alkali with caustic alkali equality strength.And long-chain alkyl ammonium hydroxide not only has strong basicity due to it, and there is surfactivity, therefore can be applied in a lot of fields.Long-chain alkyl ammonium hydroxide refers to the ammonium hydroxide that carbonatoms is greater than 10.
Chinese patent CN1417201A adopts quaternary ammonium salt to be obtained by reacting long-chain alkyl ammonium hydroxide with mineral alkali in organic solvent, this kind of method has certain solubleness in organic solvent due to mineral alkali, inevitably containing metal ions such as a certain amount of potassium, sodium in the solution of therefore target product, the purity of product is not high.Chinese patent CN1428330A adopts anionite-exchange resin to prepare corresponding long-chain alkyl ammonium hydroxide by quaternary ammonium salt, and the method resin demand is very large, and pre-treatment and regeneration can consume a large amount of high pure acid alkali, and produce a large amount of spent acid salkali waste, cost is higher simultaneously.Chinese patent CN101680101A describes and prepares long-chain alkyl ammonium hydroxide by electrolysis halo quaternary ammonium salt, and this method has halogen gas to produce in electrolytic process, and environmental pollution is serious, and produces strongly acidic solution meeting corrosion target and electrolyzer.Secondly, with halide-ions in product, the purity of product is affected.Synthesize tetraalkyl carbonic acid first ammonium for by methylcarbonate and reactive tertiary amine, tetraalkyl carbonic acid first ammonium through hydrolysis, after electrolysis to corresponding long-chain alkyl ammonium hydroxide have no report.
Summary of the invention
The object of this invention is to provide a kind of pollution-free, low cost, the synthesis carbonatoms that purity is high is greater than the preparation method of the long-chain alkyl ammonium hydroxide of 10.
The present invention prepares employing and obtains chain alkyl carbonic acid first ammonium by tertiary amine and dimethyl carbonate, chain alkyl carbonic acid first ammonium obtains chain alkyl bicarbonate of ammonia through hydrolysis, the corresponding long-chain alkyl ammonium hydroxide of chain alkyl bicarbonate of ammonia electrolytic preparation, the long-chain alkyl ammonium hydroxide that purity is higher can be obtained, the metal ion such as potassium, sodium is not contacted in process, thus effectively reduce its content in the product, it also avoid in conventional electrolytic methods electrolytic process and produce halogen gas corrosion electrolyzer and a series of side reaction of halogen gas generation soluble in water.
Reaction equation of the present invention is as follows:
The present invention adopts the structural formula of tertiary amine to be:
In formula: R
1for carbonatoms is the alkyl of 1-2, the straight chained alkyl of 3-18 or branched-chain alkyl, R
2for straight chained alkyl or branched-chain alkyl that carbonatoms is 10-18.
Preparation method of the present invention is as follows:
(1) be 1:2-15 by the mol ratio of tertiary amine and methylcarbonate, the consumption of methyl alcohol is the 5%-20% of tertiary amine and methylcarbonate total mass, using tertiary amine and methylcarbonate under the condition of methyl alcohol as solvent, at temperature of reaction 80-200 DEG C, reaction 3-20h, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain chain alkyl carbonic acid first ammonium intermediate;
(2) be 1:5-20 by the mass ratio of chain alkyl carbonic acid first ammonium intermediate and water, at 30-90 DEG C of temperature, there is hydrolysis 0.5-7h in methyl carbonic quaternary ammonium salt intermediate, obtains chain alkyl bicarbonate of ammonia;
(3) chain alkyl bicarbonate of ammonia obtains chain alkyl bicarbonate of ammonia by electrolysis in diaphragm sell, when diaphragm electrolytic cell is the monofilm two Room electrolyzer that cationic membrane is housed, cathode compartment adds 0.02-0.5mol/L long-chain alkyl ammonium hydroxide solution or deionized water, and anolyte compartment adds 0.2-1.0mo1/L chain alkyl ammonium bicarbonate soln; When diaphragm electrolytic cell is the two membranes and three chambers electrolyzer that two panels anionic membrane is housed, cathode compartment adds 0.02-0.5mol/L long-chain alkyl ammonium hydroxide solution or deionized water, intermediate chamber adds 0.1-1.0mo1/L chain alkyl ammonium bicarbonate soln, and anolyte compartment adds 0.02-0.5mol/L chain alkyl ammonium bicarbonate soln or deionized water; When diaphragm electrolytic cell is the two membranes and three chambers electrolyzer that a slice anionic membrane and a slice cationic membrane are housed, anionic membrane is near anode, cationic membrane is near negative electrode, cathode compartment adds 0.02-0.5mol/L long-chain alkyl ammonium hydroxide solution or deionized water, intermediate chamber adds 0.1-1.0mo1/L chain alkyl ammonium bicarbonate soln, and anolyte compartment adds 0.02-0.5mol/L chain alkyl ammonium bicarbonate soln or deionized water; Be 40-80 DEG C at electrolysis temperature, preferable temperature is logical direct current at 45-65 DEG C of temperature, and electrolytic synthesis long-chain alkyl ammonium hydroxide, the long-chain alkyl ammonium hydroxide hydrogen that cathode compartment generates, nitrogen, argon gas or these gaseous mixture are protected.
Described cationic membrane is polystyrene sulfonate film, perfluoro sulfonic acid membrane or perfluorocarboxylic acid film, and anionic membrane is quaternary anion-exchange membrane.
Described cathode material is stainless steel, nickel or graphite, and anode material is the titanium being coated with ruthenium or iridium oxide.
Described working current density is 100-1000A/m
2.
Electrolytic reaction formula is as follows:
Anodic process reaction is:
Cathodic process reaction is:
Total reaction is:
The present invention compared with prior art tool has the following advantages:
Present method does not contact the metal ion such as potassium, sodium, and product purity is high, only has CO in electrolytic process
2and H
2release, in environmentally safe, preparation process, corrosion-free gas produces, and low for equipment requirements, production safety, the long-chain alkyl ammonium hydroxide synthesized not only has strong basicity but also have surfactivity.
Accompanying drawing explanation
Fig. 1 is trimethyl ammonium hydroxide infrared spectrum
Fig. 2 is trimethyl ammonium hydroxide nuclear magnetic spectrogram
Fig. 3 is tetradecyltrimethylammonium ammonium hydroxide infrared spectrum
Fig. 4 is octadecyl trimethyl ammonium hydroxide infrared spectrum
Embodiment
By embodiment, the present invention is described below, but the present invention is not limited in the following example.
Embodiment 1: by 110.2g Dodecyl Dimethyl Amine, 190.7g methylcarbonate and 15.2g methyl alcohol, join in reactor, stirring reaction 8h at 120 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain dodecyl carbonic acid first ammonium, take 20.7g dodecyl carbonic acid first ammonium and 103.7g water, join in flask, stirring reaction 3h at 70 DEG C, obtain trimethyl ammonium bicarbonate aqueous solution, trimethyl bicarbonate of ammonia being mixed with concentration is 0.8mol/L solution, join in the anolyte compartment of the monofilm two Room electrolyzer that polystyrene sulfonate film cationic exchange membrane is housed, cathode compartment adds deionized water, anode is the Ti electrode being coated with ru oxide, negative electrode is stainless steel electrode, electrolysis temperature is 45 DEG C, current density is 200A/m
2, electrolysis 6 hours, measures the content of trimethyl ammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.By infrared, nuclear-magnetism, product structure is characterized, the results are shown in Figure 1,2.
Embodiment 2: by two for 107.3g dodecyl methyl tertiary amine, 70.3g methylcarbonate and 27.3g methyl alcohol, join in reactor, stirring reaction 7h at 140 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain two dodecyl carbonic acid first ammonium, take the two dodecyl carbonic acid first ammonium of 19.5g and 138.3g water, join in flask, stirring reaction 5h at 60 DEG C, obtain two dodecyl dimethyl ammonium bicarbonate aqueous solution, it is 0.8mol/L solution that two dodecyl dimethyl bicarbonate of ammonia is mixed with concentration, join in the anolyte compartment of the monofilm two Room electrolyzer that perfluoro sulfonic acid membrane cationic exchange membrane is housed, cathode compartment adds the two dodecyl dimethyl solution of ammonium hydroxide of 0.02mol/L, anode is the Ti electrode being coated with iridium oxide, negative electrode is stainless steel electrode, electrolysis temperature is 50 DEG C, current density is 300A/m
2, electrolysis 4 hours, measures the content of two dodecyl dimethyl ammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.
Embodiment 3: by 105.6g Dodecyl Dimethyl Amine, 77.9g methylcarbonate and 21.8g methyl alcohol, join in reactor, stirring reaction 20h at 100 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain dodecyl carbonic acid first ammonium, take 17.3g dodecyl carbonic acid first ammonium and 156.0g water, join in flask, stirring reaction 7h at 30 DEG C, obtain trimethyl ammonium bicarbonate aqueous solution, trimethyl bicarbonate of ammonia being mixed with concentration is 0.55mol/L solution, join in the anolyte compartment of the monofilm two Room electrolyzer that perfluorocarboxylic acid cationic exchange membrane is housed, 0.5mol/L trimethyl solution of ammonium hydroxide is added in cathode compartment, anode is the Ti electrode being coated with ru oxide, negative electrode is Graphite Electrodes, electrolysis temperature is 55 DEG C, current density is 400A/m
2, electrolysis 6 hours, measures the content of trimethyl ammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.
Embodiment 4: by 103.2g octadecyldimethyl tertiary amine, 197.6g methylcarbonate and 27.3g methyl alcohol, join in reactor, stirring reaction 17h at 110 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain octadecyl carbonic acid first ammonium, take 23.5g octadecyl carbonic acid first ammonium and 260.3g water, join in flask, stirring reaction 6h at 40 DEG C, obtain octadecyl trimethyl ammonium bicarbonate aqueous solution, octadecyl trimethyl bicarbonate of ammonia being mixed with concentration is 0.2mol/L solution, join in the anolyte compartment of the monofilm two Room electrolyzer that perfluorocarboxylic acid cationic exchange membrane is housed, deionized water is added in cathode compartment, anode is the Ti electrode being coated with ru oxide, negative electrode is nickel electrode, electrolysis temperature is 60 DEG C, current density is 600A/m
2, electrolysis 4 hours, measures the content of octadecyl trimethyl ammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.By infrared, product structure is characterized, the results are shown in Figure 4.
Embodiment 5: by two for 113.5g ten alkyl methyl tertiary amines, 200.6g methylcarbonate and 21.9g methyl alcohol, join in reactor, stirring reaction 15h at 120 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain two ten alkylcarbonic acid first ammoniums, take the two ten alkylcarbonic acid first ammoniums of 21.5g and 280.3g water, join in flask, stirring reaction 6h at 40 DEG C, obtain didecyl Dimethy ammonium bicarbonate aqueous solution, didecyl Dimethy bicarbonate of ammonia being mixed with concentration is 0.4mol/L solution, join in the anolyte compartment of the monofilm two Room electrolyzer that perfluorinated sulfonic acid cationic exchange membrane is housed, 0.05mol/L didecyl Dimethy solution of ammonium hydroxide is added in cathode compartment, anode is the Ti electrode being coated with ru oxide, negative electrode is stainless steel electrode, electrolysis temperature is 65 DEG C, current density is 300A/m
2, electrolysis 2 hours, measures the content of didecyl Dimethy ammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.
Embodiment 6: by 109.3g ten alkyl dimethyl tertiary amide, 90.7g methylcarbonate and 10.3g methyl alcohol, join in reactor, stirring reaction 20h at 80 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain ten alkylcarbonic acid first ammoniums, take 19.6g ten alkylcarbonic acid first ammonium and 293.7g water, join in flask, stirring reaction 0.5h at 60 DEG C, obtain ten alkyl trimethyl ammonium bicarbonate aqueous solutions, it is 1.0mol/L solution that ten alkyl trimethyl bicarbonate of ammonia are mixed with concentration, join in the intermediate salt room of the two membranes and three chambers electrolyzers that two panels quaternary anion-exchange membrane is housed, deionized water is added in anolyte compartment, 0.05mol/L ten alkyltrimethylammonium hydroxide solution is added in cathode compartment, anode is the Ti electrode being coated with ru oxide, negative electrode is nickel electrode, electrolysis temperature is 40 DEG C, current density is 600A/m
2, electrolysis 2 hours, measures the content of ten alkyltrimethylammonium hydroxide products in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.
Embodiment 7: by 114.5g dodecyldimethylamine base tertiary amine, 337.3g methylcarbonate and 70.9g methyl alcohol, join in reactor, stirring reaction 11h at 120 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain tetradecyl carbonic acid first ammonium, take 20.9g tetradecyl carbonic acid first ammonium and 355.3g water, join in flask, stirring reaction 4h at 40 DEG C, obtain tetradecyltrimethylammonium ammonium bicarbonate aqueous solution, tetradecyltrimethylammonium bicarbonate of ammonia being mixed with concentration is 0.8mol/L solution, join in the intermediate salt room of the two membranes and three chambers electrolyzers that two panels quaternary anion-exchange membrane is housed, deionized water is added in anolyte compartment, deionized water is added in cathode compartment, anode is the Ti electrode being coated with ru oxide, negative electrode is stainless steel electrode, electrolysis temperature is 45 DEG C, current density is 300A/m
2, electrolysis 2 hours, measures the content of tetradecyltrimethylammonium ammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.By infrared, product structure is characterized, the results are shown in Figure 3.
Embodiment 8: by 107.9g hexadecyldimethyl benzyl ammonium tertiary amine, 354.9g methylcarbonate and 22.3g methyl alcohol, join in reactor, stirring reaction 7h at 140 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain hexadecyl carbonic acid first ammonium, take 23.5g hexadecyl carbonic acid first ammonium and 446.5g water, join in flask, stirring reaction 2h at 50 DEG C, obtain cetyl trimethyl ammonium bicarbonate aqueous solution, cetyl trimethyl bicarbonate of ammonia being mixed with concentration is 0.4mol/L solution, join in the intermediate chamber of the two membranes and three chambers electrolyzers that a slice perfluorinated sulfonic acid cationic exchange membrane and a slice quaternary anion-exchange membrane are housed, anionic membrane is near anode, cationic membrane is near negative electrode, cathode compartment adds 0.3mol/L cetyltrimethylammonium hydroxide solution, anolyte compartment adds 0.3mol/L cetyl trimethyl ammonium bicarbonate soln, anode is the Ti electrode being coated with ru oxide, negative electrode is Graphite Electrodes, electrolysis temperature is 50 DEG C, current density is 600A/m
2, electrolysis 2 hours, measures the content of cetyltrimethylammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.
Embodiment 9: by two for 103.7g tetradecylmethyl tertiary amine, 258.9g methylcarbonate and 72.1g methyl alcohol, join in reactor, stirring reaction 6h at 160 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain two tetradecyl carbonic acid first ammonium, take the two tetradecyl carbonic acid first ammonium of 22.3g and 446.0g water, join in flask, stirring reaction 2h at 70 DEG C, obtain two dodecyldimethylamine base ammonium bicarbonate aqueous solution, it is 0.8mol/L solution that two dodecyldimethylamine base bicarbonate of ammonia is mixed with concentration, join in the intermediate chamber of the two membranes and three chambers electrolyzers that two panels quaternary anion-exchange membrane is housed, two dodecyldimethylamine base ammonium bicarbonate aqueous solutions of 0.07mol/L are added in anolyte compartment, deionized water is added in cathode compartment, anode is the Ti electrode being coated with ru oxide, negative electrode is stainless steel electrode, electrolysis temperature is 55 DEG C, current density is 700A/m
2, electrolysis 2 hours, measures the content of two dodecyldimethylamine base ammonium hydroxide product in intermediate chamber, and calculates energy consumption and current efficiency, the results are shown in Table 1.
Embodiment 10: by 109.6g double hexadecyl methyl tertiary amine, 242.3g methylcarbonate and 34.9g methyl alcohol, join in reactor, stirring reaction 5h at 180 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain double hexadecyl carbonic acid first ammonium, take 18.7g double hexadecyl carbonic acid first ammonium and 275.3g water, join in flask, stirring reaction 3h at 80 DEG C, obtain di-cetyl dimethyl ammonium bicarbonate aqueous solution, di-cetyl dimethyl bicarbonate of ammonia being mixed with concentration is 0.8mol/L solution, join in the intermediate salt room of the two membranes and three chambers electrolyzers that two panels quaternary anion-exchange membrane is housed, anolyte compartment adds deionized water, deionized water is added in cathode compartment, anode is the Ti electrode being coated with ru oxide, negative electrode is nickel electrode, electrolysis temperature is 65 DEG C, current density is 400A/m
2, electrolysis 2 hours, measures the content of di-cetyl dimethyl ammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.
Embodiment 11: by two for 113.2g octadecyl methyl tertiary amine, 262.1g methylcarbonate and 48.4g methyl alcohol, join in reactor, stirring reaction 3h at 200 DEG C, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain two octadecyl carbonic acid first ammonium, take the two octadecyl carbonic acid first ammonium of 17.6g and 352.0g water, join in flask, stirring reaction 1h at 90 DEG C, obtain two octadecyldimethyl ammonium bicarbonate aqueous solution, it is 0.25mol/L solution that two octadecyldimethyl bicarbonate of ammonia is mixed with concentration, join in the anolyte compartment of the monofilm two Room electrolyzer that perfluorocarboxylic acid cationic exchange membrane is housed, two octadecyldimethyl solution of ammonium hydroxide of 0.02mol/L are added in cathode compartment, anode is the Ti electrode being coated with ru oxide, negative electrode is Graphite Electrodes, electrolysis temperature is 45 DEG C, current density is 200A/m
2, electrolysis 2 hours, measures the content of two octadecyldimethyl ammonium hydroxide product in cathode compartment, and calculates energy consumption and current efficiency, the results are shown in Table 1.
Table 1
| Mass fraction of product (%) | Energy consumption (Kwh/Kg) | Current efficiency (%) | |
| Example 1 | 3.22 | 3.005 | 41.37 |
| Example 2 | 3.33 | 3.553 | 40.84 |
| Example 3 | 3.79 | 4.132 | 40.37 |
| Example 4 | 1.90 | 3.117 | 47.34 |
| Example 5 | 2.73 | 2.143 | 67.72 |
| Example 6 | 1.59 | 1.924 | 71.33 |
| Example 7 | 1.47 | 3.029 | 49.47 |
| Example 8 | 1.53 | 2.901 | 52.93 |
| Example 9 | 1.67 | 2.819 | 54.36 |
| Example 10 | 1.60 | 3.053 | 50.13 |
| Example 11 | 1.63 | 3.743 | 43.13 |
Claims (6)
1. prepare a method for long-chain alkyl ammonium hydroxide, it is characterized in that comprising the steps:
(1) be 1:2-15 by the mol ratio of tertiary amine and methylcarbonate, the consumption of methyl alcohol is the 5%-20% of tertiary amine and methylcarbonate total mass, using tertiary amine and methylcarbonate under the condition of methyl alcohol as solvent, at temperature of reaction 80-200 DEG C, reaction 3-20h, after reaction terminates, underpressure distillation removing methyl alcohol and methylcarbonate, obtain chain alkyl carbonic acid first ammonium intermediate;
(2) be 1:5-20 by the mass ratio of chain alkyl carbonic acid first ammonium intermediate and water, at 30-90 DEG C of temperature, there is hydrolysis 0.5-7h in chain alkyl carbonic acid first ammonium intermediate, obtains chain alkyl bicarbonate of ammonia;
(3) chain alkyl bicarbonate of ammonia obtains long-chain alkyl ammonium hydroxide by electrolysis in diaphragm sell, when diaphragm electrolytic cell is the monofilm two Room electrolyzer that cationic membrane is housed, cathode compartment adds 0.02-0.5mol/L long-chain alkyl ammonium hydroxide solution or deionized water, and anolyte compartment adds 0.2-1.0mo1/L chain alkyl ammonium bicarbonate soln; When diaphragm electrolytic cell is the two membranes and three chambers electrolyzer that a slice anionic membrane and a slice cationic membrane are housed, anionic membrane is near anode, cationic membrane is near negative electrode, cathode compartment adds 0.02-0.5mol/L long-chain alkyl ammonium hydroxide solution or deionized water, intermediate chamber adds 0.1-1.0mo1/L chain alkyl ammonium bicarbonate soln, and anolyte compartment adds 0.02-0.5mol/L chain alkyl ammonium bicarbonate soln or deionized water; Logical direct current under electrolysis temperature is 40-80 DEG C of temperature, electrolytic synthesis long-chain alkyl ammonium hydroxide, the long-chain alkyl ammonium hydroxide hydrogen that cathode compartment generates, nitrogen, argon gas or these gaseous mixture are protected.
2. a kind of method preparing long-chain alkyl ammonium hydroxide as claimed in claim 1, is characterized in that the structural formula of described tertiary amine is:
In formula: R
1for carbonatoms is the alkyl of 1-2, the straight chained alkyl of 3-18 or branched-chain alkyl, R
2for straight chained alkyl or branched-chain alkyl that carbonatoms is 10-18.
3. a kind of method preparing long-chain alkyl ammonium hydroxide as claimed in claim 1, it is characterized in that described cationic membrane is polystyrene sulfonate film, perfluoro sulfonic acid membrane or perfluorocarboxylic acid film, anionic membrane is quaternary anion-exchange membrane.
4. a kind of method preparing long-chain alkyl ammonium hydroxide as claimed in claim 1, it is characterized in that described cathode material is stainless steel, nickel or graphite, anode material is the titanium being coated with ruthenium or iridium oxide.
5. a kind of method preparing long-chain alkyl ammonium hydroxide as claimed in claim 1, is characterized in that described working current density is 100-1000A/m
2.
6. a kind of method preparing long-chain alkyl ammonium hydroxide as claimed in claim 1, is characterized in that described electrolysis temperature is 45-65 DEG C.
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| CN106350832B (en) * | 2016-08-26 | 2018-04-10 | 肯特催化材料股份有限公司 | Molecular Sieves as Template agent high-purity hydrogen aoxidizes the preparation method of the hexamethonium C6 aqueous solution |
| CN106350831A (en) * | 2016-08-26 | 2017-01-25 | 肯特催化材料股份有限公司 | Preparation method of molecular sieve template high-purity adamantyltrimethylammonium hydroxide water solution |
| CN106801233B (en) * | 2017-01-11 | 2019-02-01 | 浙江工业大学 | A kind of electrolysis method prepares the system and method for high-purity tetrapropylammonium hydroxide |
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| CN1259174A (en) * | 1997-04-03 | 2000-07-05 | 沙彻姆公司 | Synthesis of onium hydroxides from onium salts |
| CN102351719A (en) * | 2011-10-08 | 2012-02-15 | 中国日用化学工业研究院 | Dialkyl dimethyl quaternary ammonium salt and preparation method thereof |
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| CN1259174A (en) * | 1997-04-03 | 2000-07-05 | 沙彻姆公司 | Synthesis of onium hydroxides from onium salts |
| CN102351719A (en) * | 2011-10-08 | 2012-02-15 | 中国日用化学工业研究院 | Dialkyl dimethyl quaternary ammonium salt and preparation method thereof |
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| CN110318066A (en) * | 2019-06-20 | 2019-10-11 | 青岛鼎海电化学科技有限公司 | A kind of preparation method of tetra-alkyl ammonium hydroxide |
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