CN1948268A - Synthesis method of quaternary ammonium salt - Google Patents

Synthesis method of quaternary ammonium salt Download PDF

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CN1948268A
CN1948268A CNA2005100610944A CN200510061094A CN1948268A CN 1948268 A CN1948268 A CN 1948268A CN A2005100610944 A CNA2005100610944 A CN A2005100610944A CN 200510061094 A CN200510061094 A CN 200510061094A CN 1948268 A CN1948268 A CN 1948268A
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quaternary ammonium
ammonium salt
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郑卓群
吴廷华
周小平
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Zhejiang Normal University CJNU
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Abstract

The present invention relates to a method for synthesizing quaternary ammonium salt by adopting carbonic diester, amine (ammonia) salt and catalyst. Under the action of catalyst a certain quantity of carbonic diester and a certain quantity of amine (ammonia) salt can be placed in a reaction still, and reacted for 4-12 h so as to obtain the invented product. Its reaction temperature is 50 deg.C-300 deg.C, and its reaction pressure is 0.5MPa-50MPa.

Description

The synthetic method of quaternary ammonium salt
Technical field
The present invention relates to a kind of synthetic method of quaternary ammonium salt, particularly a kind of employing carbonic diester (fat), amine (ammonia) salt are in the method for next step synthetic quaternary ammonium salt of catalyst action.
Background technology
Quaternary ammonium salt is a kind of important chemical material, it is widely used in daily-use chemical industry, medicine, weaving, printing and dyeing, mining, plastic working, oil production and field of petrochemical industry, people have carried out the research and development of a large amount of quaternary ammonium salt technologies of preparing for this reason, by the disclosed quaternary ammonium salt technology of preparing of Chinese patent literature One's name is legion, for example:
The patent No. is 200410012215.1 a kind of ester-amine series quaternary ammonium salt and synthetic method thereof.This ester-amine series quaternary ammonium salt and synthetic method thereof are with the synthetic method of methylcarbonate as quaternizing agent and ester amine reaction synthesizing ester amine class quaternary ammonium salt.
The patent No. is the preparation of 95195357.5 quaternized aminoacetonitriles.The preparation of this quaternized aminoacetonitriles is the preparation method who prepares quaternized aminoacetonitriles with methyl-sulfate, ethyl sulfate, methyl halide or ethyl halide, methylcarbonate, diethyl carbonate, toluenesulphonic acids methyl esters, toluenesulphonic acids ethyl ester, methyl mesylate, ethyl methane sulfonate or benzyl halide as alkylating reagent.
The patent No. is the in-situ preparing quaternary ammonium supercarbonate of 02802303.x and the method for quaternary ammonium carbonate.The method of this in-situ preparing quaternary ammonium supercarbonate and quaternary ammonium carbonate is from tertiary amine, at least a high productivity in methyl alcohol and cyclic carbonate, aliphatic polyester and the ester prepares quaternary ammonium methylcarbonate and quaternary ammonium alkyl carbonate, and they change into quaternary ammonium supercarbonate, quaternary ammonium carbonate or both in-situ methods in single still reaction subsequently.The method that this method utilizes cyclic carbonate to be transformed into carbonic ether and polyvalent alcohol in the presence of methyl alcohol or other alcohol and catalyzer (amine) substitutes directly uses carbonic ether.The quaternary ammonium methylcarbonate of this method preparation or quaternary ammonium alkyl carbonate can be converted into corresponding supercarbonate by hydrolysis method and other permutoid reaction method (as dehydration), make quaternary ammonium carbonate by additive method such as heating again.
In existing quaternary ammonium salt preparation method, generally can only directly synthesize and contain Cl -, Br -, I -Or SO 4 2-Etc. anionic quaternary ammonium salt, synthesize contain specific anionic quaternary ammonium salt can not one the step finish, often need to realize by ion-exchange, as: when preparing Methanaminium, N,N,N-trimethyl-, fluoride, KF with excessive 30% and tetramethyl ammonium chloride are in moisture 5% methanol solution behind the stirring and refluxing 2h, cooling, filtration, crystalline N (CH must be white in color after filtrate decompression concentrates 3) 4F.4H 2O; For another example, in existing quaternary ammonium salt preparation method, just synthetic indivedual these compounds of quaternary ammonium nitrate.In addition, existing quaternary ammonium salt preparation method also exists the weak point that technical requirements is tight, preparation cost is high.
Summary of the invention
The objective of the invention is at existing quaternary ammonium salt preparation method existing can not one the step finish the synthetic specific anionic quaternary ammonium salt that contains, in the quaternary ammonium salt preparation process, exist the weak point that technical requirements is tight, preparation cost is high, provide a kind of tight to technical requirements in the quaternary ammonium salt preparation process, preparation cost is low, and can a step finish the synthetic one-step method for synthesizing that contains specific anionic quaternary ammonium salt.
The synthetic method of quaternary ammonium salt of the present invention is a kind of from carbonic diester (fat), amine (ammonia) the salt method at next step synthetic quaternary ammonium salt of catalyst action.
Carbonic diester (fat) is to have OC (OR 1) (OR 2) carbonic diester (fat) of molecular formula, wherein R 1And R 2Be contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl, contain hydrocarbon oxynitride phosphor sulphur Halothane organic group and/or-CR 3R 4R 5(R wherein 3, R 4, R 5Be hydrogen, contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl or contain the organic group of hydrocarbon oxynitride phosphor sulphur Halothane), its structure is:
Figure A20051006109400051
Amine (ammonia) is NH 3, NH 2R 1, NHR 1R 2, NR 1R 2R 3, R wherein 1, R 2, R 3Be contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl, contain hydrocarbon oxynitride phosphor sulphur Halothane organic group and/or-CR 4R 5R 6(R wherein 4, R 5, R 6Be hydrogen, contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl or contain the organic group of hydrocarbon oxynitride phosphor sulphur Halothane); Amine (ammonia) salt is ammonium sulfate, ammonium nitrate, ammonium phosphate, ammonium hydrogen phosphate, primary ammonium phosphate, Neutral ammonium fluoride, ammonium chloride, brometo de amonio, ammonium sulfide, volatile salt, bicarbonate of ammonia, ammonium oxalate, ammonium acetate, the organic acid ammonium salt of above-mentioned amine (ammonia).
The catalyzer that is adopted is the mixture or the ionic liquid of metallic compound, nonmetallic compound, metallic compound nonmetallic compound.Metallic compound, nonmetallic compound, the mixture catalyzer of metallic compound nonmetallic compound is to contain lithium, sodium, potassium, rubidium, caesium, beryllium, magnesium, calcium, strontium, barium, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, aluminium, gallium, indium, thallium, germanium, tin, plumbous, antimony, bismuth, yttrium, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, dysprosium, holmium, erbium, thulium, lutetium, tantalum, tungsten, rhenium, osmium, iridium, platinum, gold, terbium, ytterbium, the metallic compound of elements such as hafnium, carbon containing, silicon, phosphorus, sulphur, arsenic, selenium, tellurium, nitrogen, boron, fluorine, chlorine, bromine, the nonmetallic compound of elements such as iodine, and the mixture of above-mentioned metallic compound nonmetallic compound.Ionic-liquid catalyst is low-melting quaternary ammonium, phosphonium salt, and positive ion is an organic cation, and its structure is:
Figure A20051006109400052
Negative ion is [BF 4] -, [PF 6] -, Br -, Cl -, [NO 3] -, [CuCl 2] -, [HSO 4] -, [AlCl 4] -, [CH 3CO 2] -, [SO 4] 2-, [CF 3CO 2] -, [SbF 6] -Deng all negatively charged ion that can stable existence.
In ion liquid structure, wherein R, R ', R 1, R 2, R 3, R 4Be hydrogen, contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl, contain the organic group of hydrocarbon oxynitride phosphor sulphur Halothane.
The synthetic quaternary ammonium salt cationic is [NR 1R 2R 3R 4] +, R wherein 1, R 2, R 3, R 4For contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl, contain hydrocarbon oxynitride phosphor sulphur Halothane organic group and/or-CR 5R 6R 7(R wherein 5, R 6, R 7Be hydrogen, contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl or contain the organic group of hydrocarbon oxynitride phosphor sulphur Halothane), the quaternary ammonium salt negatively charged ion is sulfate ion, hydrogen sulfate ion, nitrate ion, phosphate anion, phosphoric acid hydrogen radical ion, dihydrogen phosphate ions, fluorion, chlorion, bromide anion, iodide ion, sulfonium ion, carbanion, bicarbonate ion, oxalate denominationby, acetate ion, organic acid ion.
The method of the synthetic quaternary ammonium salt of the present invention is:
Take by weighing a certain amount of carbonic diester (fat), amine (ammonia) salt and catalyzer, put into reactor, temperature of reaction is 50 ℃~300 ℃, and reaction pressure is 0.5MPa~50Mpa, and the reaction times is 4~12 hours.
The synthetic method of quaternary ammonium salt of the present invention is compared with existing quaternary ammonium salt preparation method, have in the quaternary ammonium salt preparation process tight to technical requirements, preparation cost is low, and can a step finish the synthetic characteristics that contain specific negatively charged ion quaternary ammonium salt.The present invention can make and design synthetic all kinds of quaternary ammonium salts according to actual needs and become possibility.
Embodiment
Below in conjunction with embodiment the present invention is made further and to specify, but the present invention is not limited to these embodiment.
Embodiment 1
Taking by weighing a certain amount of volatile salt, methylcarbonate and EMImBr (EMIm-1-methyl-3-ethyl imidazol(e)) joins in the minisize reaction still, the each component mol ratio is 1: 8: 0.6, speed with 35K/min is warming up to 165 ℃ then, reacted 8 hours, reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 98.3%, tetramethyl-volatile salt yield 45.3%.
Embodiment 2
Take by weighing a certain amount of ammonium chloride, methylcarbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 4: 0.2, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 93.5%, tetramethyl ammonium chloride yield 95.4%.
Embodiment 3
Take by weighing a certain amount of volatile salt and methylcarbonate and join in the minisize reaction still, do not add catalyzer, the each component mol ratio is 1: 8, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 92.6%, tetramethyl-volatile salt yield 17.4%.
Embodiment 4
Take by weighing a certain amount of ammonium chloride, methylcarbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 170 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 93.1%, tetramethyl ammonium chloride yield 96.8%.
Embodiment 5
Take by weighing a certain amount of ammonium acetate, methylcarbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 97.6%, tetramethyl-ammonium acetate yield 44.3%.
Embodiment 6
Take by weighing a certain amount of ammonium oxalate, methylcarbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 8: 0.8, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 94.6%, quaternary ammonium salt yield 45.3%.
Embodiment 7
Take by weighing a certain amount of ammonium sulfate, methylcarbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 8: 0.8, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 91.7%, tetramethyl-ammonium sulfate yield 70.4%.
Embodiment 8
Take by weighing a certain amount of bicarbonate of ammonia, methylcarbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 4: 0.3, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 99.5%, quaternary ammonium salt yield 50.2%.
Embodiment 9
Take by weighing a certain amount of ammonium nitrate, methylcarbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 4: 0.3, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 99.3%, tetramethyl-ammonium nitrate yield 96.4%.
Embodiment 10
Take by weighing a certain amount of Neutral ammonium fluoride, methylcarbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 99.4%, Methanaminium, N,N,N-trimethyl-, fluoride yield 82.3%.
Embodiment 11
Take by weighing a certain amount of ammonium chloride, methylcarbonate and PbO and go in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows, only generates micro-quaternary ammonium salt.
Embodiment 12
Take by weighing a certain amount of ammonium chloride, methylcarbonate and V 2O 5Join in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows, only generates micro-quaternary ammonium salt.
Embodiment 13
Take by weighing a certain amount of ammonium chloride, methylcarbonate and AlCl 3Join in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows, only generates micro-quaternary ammonium salt.
Embodiment 14
Take by weighing a certain amount of ammonium chloride, methylcarbonate and Cr 2O 3Join in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows, only generates micro-quaternary ammonium salt.
Embodiment 15
Take by weighing a certain amount of ammonium chloride, methylcarbonate and catalyzer (ZrO 2In the vitriol oil, soak after 24 hours 500 ℃ of roastings 4 hours) join in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 165 ℃ then, react 8 hours, and reaction finishes afterwards the naturally cooling reactor to room temperature.Quantitative analysis results shows, only generates micro-quaternary ammonium salt.
Embodiment 16
Taking by weighing a certain amount of ammonium nitrate, methylcarbonate and acidic molecular sieve joins in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows, only generates micro-quaternary ammonium salt.
Embodiment 17
Take by weighing a certain amount of volatile salt, diethyl carbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 8: 0.8, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the diethyl carbonate transformation efficiency reaches 85.6%, tetraethyl-volatile salt yield 20.1%.
Embodiment 18
Take by weighing a certain amount of ammonium nitrate, diethyl carbonate and EMImBr and join in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows, tetraethyl-ammonium nitrate yield 2.1%.
Embodiment 19
Taking by weighing a certain amount of ammonium chloride, diethyl carbonate and BMImBr (BMIm-1-methyl-3-butyl imidazole) joins in the minisize reaction still, the each component mol ratio is 1: 4: 0.4, speed with 35K/min is warming up to 165 ℃ then, reacted 8 hours, reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows, etamon chloride yield 17.8%
Embodiment 20
Take by weighing a certain amount of volatile salt, methylcarbonate and BMImBr and join in the minisize reaction still, the each component mol ratio is 1: 8: 0.7, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 94.1%, tetramethyl-volatile salt yield 42.6%.
Embodiment 21
Take by weighing a certain amount of volatile salt, methylcarbonate and (BMIm) 2SO 4Join in the minisize reaction still, the each component mol ratio is 1: 8: 0.8, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 95.8%, tetramethyl-volatile salt yield 26.2%.
Embodiment 22
Take by weighing a certain amount of Neutral ammonium fluoride, methylcarbonate and BMImBF 4Join in the minisize reaction still, the each component mol ratio is 1: 4: 0.3, and the speed with 35K/min is warming up to 165 ℃ then, reacts 8 hours, and reaction finishes back naturally cooling reactor to room temperature.Quantitative analysis results shows that the methylcarbonate transformation efficiency reaches 99.1%, Methanaminium, N,N,N-trimethyl-, fluoride yield 50.1%.

Claims (10)

1, a kind of synthetic method of quaternary ammonium salt is characterized in that the carbonic diester (fat) and amine (ammonia) salt of certain proportioning are put into reactor, at next step synthetic quaternary ammonium salt of catalyst action.
2, the synthetic method of quaternary ammonium salt according to claim 1 is characterized in that carbonic diester (fat) is to have OC (OR 1) (OR 2) carbonic diester (fat) of molecular formula, wherein R 1And R 2Be contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl, contain hydrocarbon oxynitride phosphor sulphur Halothane organic group and/or-CR 3R 4R 5, R wherein 3, R 4, R 5Be hydrogen, contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl or contain the organic group of hydrocarbon oxynitride phosphor sulphur Halothane that structure is as follows:
3, the synthetic method of quaternary ammonium salt according to claim 1 is characterized in that amine (ammonia) is NH 3, NH 2R 1, NHR 1R 2, NR 1R 2R 3, R wherein 1, R 2, R 3Be contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl, contain hydrocarbon oxynitride phosphor sulphur Halothane organic group and/or-CR 4R 5R 6, R wherein 4, R 5, R 6Be hydrogen, contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl or contain the organic group of hydrocarbon oxynitride phosphor sulphur Halothane.
4, the synthetic method of quaternary ammonium salt according to claim 1 is characterized in that amine (ammonia) salt is ammonium sulfate, monoammonium sulfate, ammonium nitrate, ammonium phosphate, ammonium hydrogen phosphate, primary ammonium phosphate, Neutral ammonium fluoride, ammonium chloride, brometo de amonio, ammonium iodide, ammonium sulfide, volatile salt, bicarbonate of ammonia, ammonium oxalate, ammonium acetate, the organic acid ammonium salt of amine (ammonia).
5, the synthetic method of quaternary ammonium salt according to claim 1 is characterized in that catalyzer is the mixture or the ionic liquid of metallic compound, nonmetallic compound, metallic compound and nonmetallic compound.
6, the synthetic method of quaternary ammonium salt according to claim 5, it is characterized in that metallic compound, nonmetallic compound, the mixture catalyzer of metallic compound nonmetallic compound is to contain lithium, sodium, potassium, rubidium, caesium, beryllium, magnesium, calcium, strontium, barium, scandium, titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, zinc, aluminium, gallium, indium, thallium, germanium, tin, plumbous, antimony, bismuth, yttrium, zirconium, niobium, molybdenum, ruthenium, rhodium, palladium, silver, cadmium, lanthanum, cerium, praseodymium, neodymium, samarium, europium, gadolinium, dysprosium, holmium, erbium, thulium, lutetium, tantalum, tungsten, rhenium, osmium, iridium, platinum, gold, terbium, ytterbium, the metallic compound of elements such as hafnium, carbon containing, silicon, phosphorus, sulphur, arsenic, selenium, tellurium, nitrogen, boron, fluorine, chlorine, bromine, the nonmetallic compound of elements such as iodine, the mixture of above-mentioned metallic compound nonmetallic compound.
7, the synthetic method of quaternary ammonium salt according to claim 5 is characterized in that ionic-liquid catalyst is low-melting quaternary ammonium, phosphonium salt, and positive ion is an organic cation, and structure is as follows:
8, the synthetic method of quaternary ammonium salt according to claim 1 is characterized in that said quaternary ammonium salt cationic is [NR 1R 2R 3R 4] +, R wherein 1, R 2, R 3, R 4For contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl, contain hydrocarbon oxynitride phosphor sulphur Halothane organic group and/or-CR 5R 6R 7(R wherein 5, R 6, R 7Be hydrogen, contain hydrocarbon alkyl, thiazolinyl, alkynyl, phenyl, aryl or contain the organic group of hydrocarbon oxynitride phosphor sulphur Halothane).The quaternary ammonium salt negatively charged ion is sulfate ion, hydrogen sulfate ion, nitrate ion, phosphate anion, phosphoric acid hydrogen radical ion, dihydrogen phosphate ions, fluorion, chlorion, bromide anion, iodide ion, sulfonium ion, carbanion, bicarbonate ion, oxalate denominationby, acetate ion, organic acid ion.
9, the synthetic method of quaternary ammonium salt according to claim 1 is characterized in that temperature of reaction is 50 ℃~300 ℃, and reaction pressure is 0.5MPa~50Mpa.
10, the synthetic method of quaternary ammonium salt according to claim 1 is characterized in that the reaction times is 4~12 hours.
CNA2005100610944A 2005-10-10 2005-10-10 Synthesis method of quaternary ammonium salt Pending CN1948268A (en)

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CN102199096A (en) * 2011-03-15 2011-09-28 邱建兴 Method for synthesizing organic ionic compounds
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CN117486728A (en) * 2023-12-28 2024-02-02 山东国邦药业有限公司 Efficient circulating fluorination reagent and preparation method and application thereof
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