WO2015115962A1 - Synthesis of amonnium dinitramide, adn - Google Patents

Synthesis of amonnium dinitramide, adn Download PDF

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Publication number
WO2015115962A1
WO2015115962A1 PCT/SE2015/000004 SE2015000004W WO2015115962A1 WO 2015115962 A1 WO2015115962 A1 WO 2015115962A1 SE 2015000004 W SE2015000004 W SE 2015000004W WO 2015115962 A1 WO2015115962 A1 WO 2015115962A1
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Prior art keywords
ammonium
adn
alcohol
gudn
dinitramide
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PCT/SE2015/000004
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French (fr)
Inventor
Stefan Ek
Martin SKARSTIND
Nikolaj Latypov
Henrik Skifs
Jonas Johansson
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TotalFoersvarets Forskningsinstitut FOI
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TotalFoersvarets Forskningsinstitut FOI
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Priority to EP15743454.9A priority Critical patent/EP3099652B1/en
Priority to US15/115,743 priority patent/US10112834B2/en
Publication of WO2015115962A1 publication Critical patent/WO2015115962A1/en
Anticipated expiration legal-status Critical
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    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
    • C01B21/087—Compounds containing nitrogen and non-metals and optionally metals containing one or more hydrogen atoms
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B25/00—Compositions containing a nitrated organic compound
    • C06B25/34—Compositions containing a nitrated organic compound the compound being a nitrated acyclic, alicyclic or heterocyclic amine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B01D15/08—Selective adsorption, e.g. chromatography
    • B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
    • B01D15/20—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the conditioning of the sorbent material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D15/00—Separating processes involving the treatment of liquids with solid sorbents; Apparatus therefor
    • B01D15/08—Selective adsorption, e.g. chromatography
    • B01D15/10—Selective adsorption, e.g. chromatography characterised by constructional or operational features
    • B01D15/22—Selective adsorption, e.g. chromatography characterised by constructional or operational features relating to the construction of the column
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/50—Aspects relating to the use of sorbent or filter aid materials
    • B01J2220/52—Sorbents specially adapted for preparative chromatography

Definitions

  • ADN ammonium dinitramide
  • PDN potassium-dinitramide
  • US7981393 KDN is reacted with ammonium- sulfate in a water solution which yields ADN.
  • the second process stage is described in EP0843647.
  • a problem with this production is that the process includes potassium. The potassium will be left in the final product, ADN, which is a problem. It is difficult and expensive to remove the potassium from the ADN. Potassium presents an increased signature when combusting solid rocket fuels and in liquid fuels it creates problems with catalyst poisoning.
  • Another problem with the current production process is that the process involves two process steps. Additional process steps create a more
  • a further problem with using the current process is that it demands the use of a large amount of solvent. Solvents have to be taken care of, and possess an environmental burden which preferably should be avoided. The current process is hence expensive, time consuming, environmentally burdening and yields ADN that can be polluted by potassium.
  • the invention comprises a process by which ADN can be produced using GUDN.
  • GUDN is reacted with an ammonium source, for example ammonium- sulfate, ammonium-sulfamate or ammonia, where an ion-change forms ADN from GUDN in a single process stage.
  • an ammonium source for example ammonium- sulfate, ammonium-sulfamate or ammonia
  • an ion-change forms ADN from GUDN in a single process stage.
  • the invention is comprises reacting GUDN with an ammonium source whereby ADN is formed through an ion-exchange reaction.
  • GUDN is heated together with an ammonium source, for example ammonium-sulfate or ammonium-sulfamate in a water solution until the solution is homogenous. Thereafter the heat source is removed and alcohol, for instance methanol, ethanol, propanols, butanols or similar is added when guanylurea-sulfate (when using an ammonium source, for example ammonium-sulfate or ammonium-sulfamate in a water solution until the solution is homogenous. Thereafter the heat source is removed and alcohol, for instance methanol, ethanol, propanols, butanols or similar is added when guanylurea-sulfate (when using an ammonium source, for example ammonium-sulfate or ammonium-sulfamate in a water solution until the solution is homogenous. Thereafter the heat source is removed and alcohol, for instance methanol, ethanol, propanols, butanols or similar
  • ammonium-sulfate or guanylurea-sulfamate (using ammonium-sulfamate) precipitates from the solution and is filtered off.
  • a filtrate is achieved that, among other things contains ADN and un-reacted GUDN.
  • the filtrate is concentrated and the residue from this stage is suspended in one of the above mentioned alcohols, and ADN is dissolved in it. GUDN remains undissolved and is discarded through filtration.
  • the filtrate is concentrated to dryness which yields pure ADN.
  • ammonia is used as a source of ammonium.
  • a solution of ammonia and GUDN is made.
  • an ion-exchange takes place at which ADN and guanylurea is formed in the solution.
  • the solution is passed through a column with active carbon which has been pre-treated with diluted ammonia. Guanylurea then remained in the column and ADN leaves the column together with the solvent. Evaporation of this, so called, eluted solution yields pure ADN.
  • GUDN and ammonium-sulfate are mixed in an alcohol, for example methanol, ethanol, propanols and butanols or similar.
  • a mixture of alcohol, GUDN and ammonium-sulfate is backflow-boiled to achieve an ion-exchange. Thereafter the mix is left to cool and a precipitate is formed. The precipitate is filtered off and a filtrate is achieved.
  • the filtrate there is, among other things, ADN and un-reacted GUDN.
  • the filtrate is concentrated to dryness and the remains from this stage is suspended in one of the above mentioned alcohols, at which time ADN is dissolved.
  • GUDN remains un-dissolved and is removed through filtration.
  • the filtrate which is achieved is concentrated to dryness yielding pure ADN.
  • GUDN is mixed with ammonium-sulfate in a solution of water and alcohol.
  • Alcohols that can be used are, for example, propanols, pentanols or similar so that a two-phase system is achieved.
  • the mixture is heated until a homogenous solution is achieved. Thereafter the heat is removed and the phases separate again.
  • the organic phase is taken aside.
  • the water phase is extracted using one of the above mentioned alcohols. After separation the organic phase from this extraction is mixed with the organic phase from the previous step. This mixture is concentrated to dryness which yields pure ADN.
  • a mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfate (0,758g, 5,74 mmole) and water (10 g). The mixture was heated to about 00° C while stirring until it was homogenous, in other words about 5 minutes. Thereafter the heat source was removed and 2-propanol (100 ml) was added which produced a precipitate. The precipitate was filtered and washed with 2-propanol (50 ml). The filtrate and the wash fluid were then mixed and concentrated to dryness. The remains from this stage was suspended in 2-propanol (100 ml) and the unsolved particles were filtered off. The filtrate from this stage was concentrated which yielded ADN. The return was 0,470 g (79,2%).
  • a mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfate (0,758g, 5,74 mmole) and water (10 g). The mixture was heated to about 100° C while stirring until it was homogenous, in other words about 5 minutes. Thereafter the heat source was removed and 2-propanol (200 ml) was added. Approximately 150 ml of the solvent was removed from the mixture through rotary evaporation under vacuum. The remainder from this concentrating stage was filtered. The precipitate that was filtered off was washed with 2-propanol (50 ml). This wash fluid was mixed with the filtrate. The mixture was concentrated which yielded ADN. The return was 0,327 g (55,1%).
  • a mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfate (0,758g, 5,74 mmole), water (5 ml) and 2-butanol (10 ml).
  • the mixture was heated to about 100° C while stirring until it was homogenous, in other words about 5 minutes. Thereafter the heat source was removed.
  • the solution then separated into an organic phase and a water phase.
  • the organic phase and the water phase were parted.
  • the water phase was extracted using 2-butanol (50 ml), when the solution separated into an organic phase and a water phase.
  • the organic phases from the two separations were combined and concentrated which yields ADN .
  • the return was 0,160 g (26,9%).
  • a mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfate (0,758g, 5,74 mmole) and methanol (50 ml). The mixture was backflow-boiled for 2 hours whereafter the heat source was removed. The unsolved particles were filtered away and washed with 2-propanol (50 ml). The filtered off reaction solution was mixed with the wash fluid. This mixture was then concentrated to dryness. The filtrate and the wash fluid were then mixed and concentrated to dryness. The remains from this step was suspended in 2-propanol (100 ml) and the unsolved particles were filtered away. The filtrate was concentrated which yielded pure ADN. The return was 0,145 g (24,4%).
  • a column was filled with activated carbon (20 g). The carbon was rinsed with diluted ammonia (5% NH3 aq). A solution was made using GUDN (1 ,5 g, 7,17 mmole) and NH 3 (6 g, 25% aq). The solution was applied on the column, which then was eluated using diluted ammonia (5 % NH 3 aq). The obtained eluent was then concentrated to dryness which yielded ADN. The return was 0,667 g (75%)

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention concerns a method for making ADN from GUDN in one single process step. GUDN is reacted with an ammonium source (ammonium- sulfamate, ammonium-sulfate) and an ion-change gives ADN from GUDN in one process stage. The advantages are that the process gives pure ADN without potassium contaminants and that a smaller amount of solvent is necessary. GUDN and the ammonium source are heated together with water until everything is solved into a solution. Thereafter, an alcohol is added and the precipitate formed is filtered off. The filtrate is concentrated and the residue is suspended in an alcohol. The precipitate is filtered off and ADN is obtained by concentrating the filtrate. An alternative is to, after adding the alcohol, partially concentrate the then formed mixture. The filtering off of the particles from this mixture yields a solution of ADN in alcohol. Evaporation of this solution yields clean ADN after only one filtering stage. Ammonia can also be used as a source of ammonium. GUDN is then dissolved in ammonia where after then formed ammonium-dinitramide and guanylurea are separated through separation on a column filled with active carbon. The eluted solution is concentrated until dry which yields ADN. GUDN can also be reacted with ammonium-sulfate in alcohol creating a precipitate which is filtered off. The filtrate is concentrated and the remainder is suspended in alcohol. The un-soluted particles are filtered off and ADN is obtained through concentrating

Description

Synthesis of Amonnium Dinitramide, ADN
The present state of technology and problems with the current production of
ADN Currently, ammonium dinitramide (ADN) is produced by reacting guanylurea- dinitramide in a solution of alcohol and water with potassium-hydroxide which yields potassium-dinitramide (PDN). The process is described in US7981393. In a second process stage KDN is reacted with ammonium- sulfate in a water solution which yields ADN. The second process stage is described in EP0843647. A problem with this production is that the process includes potassium. The potassium will be left in the final product, ADN, which is a problem. It is difficult and expensive to remove the potassium from the ADN. Potassium presents an increased signature when combusting solid rocket fuels and in liquid fuels it creates problems with catalyst poisoning. Another problem with the current production process is that the process involves two process steps. Additional process steps create a more
expensive and more time consuming process. A further problem with using the current process is that it demands the use of a large amount of solvent. Solvents have to be taken care of, and possess an environmental burden which preferably should be avoided. The current process is hence expensive, time consuming, environmentally burdening and yields ADN that can be polluted by potassium.
The invention and advantages with the invention
The invention comprises a process by which ADN can be produced using GUDN. GUDN is reacted with an ammonium source, for example ammonium- sulfate, ammonium-sulfamate or ammonia, where an ion-change forms ADN from GUDN in a single process stage. The advantages are that the process involves only one process stage and that a smaller amount of solvent is needed. Hence, the process is simpler and more environmentally friendly than previously known processes. Furthermore, the process does not involve potassium and, thus, does not give any potassium residues in produced ADN.
Closer description of the invention
The invention is comprises reacting GUDN with an ammonium source whereby ADN is formed through an ion-exchange reaction.
In the first of four described methods GUDN is heated together with an ammonium source, for example ammonium-sulfate or ammonium-sulfamate in a water solution until the solution is homogenous. Thereafter the heat source is removed and alcohol, for instance methanol, ethanol, propanols, butanols or similar is added when guanylurea-sulfate (when using
ammonium-sulfate) or guanylurea-sulfamate (using ammonium-sulfamate) precipitates from the solution and is filtered off. A filtrate is achieved that, among other things contains ADN and un-reacted GUDN. The filtrate is concentrated and the residue from this stage is suspended in one of the above mentioned alcohols, and ADN is dissolved in it. GUDN remains undissolved and is discarded through filtration. The filtrate is concentrated to dryness which yields pure ADN.
In a second described method ammonia is used as a source of ammonium. A solution of ammonia and GUDN is made. Then an ion-exchange takes place at which ADN and guanylurea is formed in the solution. The solution is passed through a column with active carbon which has been pre-treated with diluted ammonia. Guanylurea then remained in the column and ADN leaves the column together with the solvent. Evaporation of this, so called, eluted solution yields pure ADN.
In a third described method GUDN and ammonium-sulfate are mixed in an alcohol, for example methanol, ethanol, propanols and butanols or similar. A mixture of alcohol, GUDN and ammonium-sulfate is backflow-boiled to achieve an ion-exchange. Thereafter the mix is left to cool and a precipitate is formed. The precipitate is filtered off and a filtrate is achieved. In the filtrate there is, among other things, ADN and un-reacted GUDN. The filtrate is concentrated to dryness and the remains from this stage is suspended in one of the above mentioned alcohols, at which time ADN is dissolved. GUDN remains un-dissolved and is removed through filtration. The filtrate which is achieved is concentrated to dryness yielding pure ADN.
In a fourth described method GUDN is mixed with ammonium-sulfate in a solution of water and alcohol. Alcohols that can be used are, for example, propanols, pentanols or similar so that a two-phase system is achieved. The mixture is heated until a homogenous solution is achieved. Thereafter the heat is removed and the phases separate again. The organic phase is taken aside. The water phase is extracted using one of the above mentioned alcohols. After separation the organic phase from this extraction is mixed with the organic phase from the previous step. This mixture is concentrated to dryness which yields pure ADN.
Example 1
A mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfate (0,758g, 5,74 mmole) and water (10 g). The mixture was heated to about 00° C while stirring until it was homogenous, in other words about 5 minutes. Thereafter the heat source was removed and 2-propanol (100 ml) was added which produced a precipitate. The precipitate was filtered and washed with 2-propanol (50 ml). The filtrate and the wash fluid were then mixed and concentrated to dryness. The remains from this stage was suspended in 2-propanol (100 ml) and the unsolved particles were filtered off. The filtrate from this stage was concentrated which yielded ADN. The return was 0,470 g (79,2%).
Example 2
A mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfamate (0,0655g, 5,74 mmole) and water (10 g). The mixture was heated to about 100° C while stirring until it was homogenous, in other words about 5 minutes. Thereafter the heat source was removed and 2-propanol (100 ml) was added which produced a precipitate. The precipitate was filtered and washed with 2-propanol (50 ml). The filtrate and the wash fluid were then mixed and concentrated to dryness. The remains from this step was suspended in 2-propanol (100 ml) and the unsolved particles were filtered off. The filtrate from this stage was concentrated which yielded ADN. The return was 0,457 g (76,9%). Example 3
A mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfate (0,758g, 5,74 mmole) and water (10 g). The mixture was heated to about 100° C while stirring until it was homogenous, in other words about 5 minutes. Thereafter the heat source was removed and 2-propanol (200 ml) was added. Approximately 150 ml of the solvent was removed from the mixture through rotary evaporation under vacuum. The remainder from this concentrating stage was filtered. The precipitate that was filtered off was washed with 2-propanol (50 ml). This wash fluid was mixed with the filtrate. The mixture was concentrated which yielded ADN. The return was 0,327 g (55,1%).
Example 4
A mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfate (0,758g, 5,74 mmole), water (5 ml) and 2-butanol (10 ml). The mixture was heated to about 100° C while stirring until it was homogenous, in other words about 5 minutes. Thereafter the heat source was removed. The solution then separated into an organic phase and a water phase. The organic phase and the water phase were parted. The water phase was extracted using 2-butanol (50 ml), when the solution separated into an organic phase and a water phase. The organic phases from the two separations were combined and concentrated which yields ADN . The return was 0,160 g (26,9%).
Example 5
A mixture was made consisting of GUDN (1g, 4,78 mmole), ammonium- sulfate (0,758g, 5,74 mmole) and methanol (50 ml). The mixture was backflow-boiled for 2 hours whereafter the heat source was removed. The unsolved particles were filtered away and washed with 2-propanol (50 ml). The filtered off reaction solution was mixed with the wash fluid. This mixture was then concentrated to dryness. The filtrate and the wash fluid were then mixed and concentrated to dryness. The remains from this step was suspended in 2-propanol (100 ml) and the unsolved particles were filtered away. The filtrate was concentrated which yielded pure ADN. The return was 0,145 g (24,4%).
Example 6
A column was filled with activated carbon (20 g). The carbon was rinsed with diluted ammonia (5% NH3 aq). A solution was made using GUDN (1 ,5 g, 7,17 mmole) and NH3 (6 g, 25% aq). The solution was applied on the column, which then was eluated using diluted ammonia (5 % NH3 aq). The obtained eluent was then concentrated to dryness which yielded ADN. The return was 0,667 g (75%)

Claims

Claims
Method for producing ammonium dinitramide
ch a ra cte rize d in th a t guanylureadinitramide is reacted with an ammonium source so that an ion-change takes place and ammonium dinitramide is formed.
Method for producing ammonium dinitramide according to claim 1 ch a ra c te rize d in th a t guanylurea dinitramide is reacted with an ammonium source in a solution of water and alcohol.
Method for producing ammonium dinitramide according to claim 2 ch a ra c te rize d in th a t the alcohol is methanol.
Method for producing ammonium dinitramide according to claim 2 ch a ra c te rize d in th a t the alcohol is ethanol.
Method for producing ammonium-dinitramide according to claim 2 ch a ra cte rize d in th a t the alcohol is a propanol.
Method for producing ammonium dinitramide according to claim 2 ch a ra cte rize d in th a t the alcohol is a butanol.
Method for producing ammonium dinitramide according to claim 2 ch a ra c te riz e d in th a t the ammonium source is ammonium-sulfamate.
8. Method for producing ammonium dinitramide according to claim 2 ch a ra c te rize d in t h a t the ammonium source is ammonium sulfate.
9. Method for producing ammonium dinitramide according to claim 1 ch a ra c te riz e d in t h a t the reaction of guanylurea- dinitramide is reacted an ammonium source in a solution of alcohol.
10. Method for producing ammonium dinitramide according to claim 9 ch a ra c terize d in t h a t the ammonium source is ammonium sulfate.
11.Method for producing ammonium dinitramide according to claim 9 ch a ra c te riz e d in th a t the ammonium source is ammonium sulfamate.
12. Method for producing ammonium dinitramide according to demand 9 ch a ra cte rize d in t h a t the alcohol is methanol.
13. Method for producing ammonium dinitramide according to claim 9 ch a ra c te rize d in t h a t the alcohol is ethanol.
14. Method for producing ammonium dinitramide according to claim 9 ch a ra c terize d in t h a t the alcohol is a propanol.
15. Method for producing ammonium dinitramide according to claim 9 ch a ra c te riz e d in th a t the alcohol is a butanol.
16. Method for producing ammonium dinitramide according to claim 1 ch a ra c terize d in th a t the ammonium source is ammonia.
17. Method for producing ammonium-dinitramide according to claim 16 ch a ra c te rize d in th a t ammonium dinitramide is isolated through separation using a carbon column.
PCT/SE2015/000004 2014-01-30 2015-01-29 Synthesis of amonnium dinitramide, adn Ceased WO2015115962A1 (en)

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SE541421C2 (en) * 2017-06-01 2019-09-24 Foi Grindsjoens Forskningscentrum Synthesis of Ammonium Dinitramide (ADN)
WO2020060451A1 (en) 2018-09-17 2020-03-26 Totalförsvarets Forskningsinstitut Synthesis of ammonium dinitramide (adn)

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CN111228855A (en) * 2020-01-14 2020-06-05 无锡市疾病预防控制中心 Preparation method of pineapple pulp matrix biochar filler solid-phase extraction column
CN116059693A (en) * 2021-11-03 2023-05-05 中国科学院大连化学物理研究所 A kind of synthetic method of dinitramide ammonium aqueous solution
CN113880112B (en) * 2021-11-03 2023-10-31 中国科学院大连化学物理研究所 A method for preparing ammonium dinitramide aqueous solution

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US7981393B2 (en) * 2004-01-21 2011-07-19 Försvarets Materielverk Method of producing salts of dinitramidic acid

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US7981393B2 (en) * 2004-01-21 2011-07-19 Försvarets Materielverk Method of producing salts of dinitramidic acid

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE541421C2 (en) * 2017-06-01 2019-09-24 Foi Grindsjoens Forskningscentrum Synthesis of Ammonium Dinitramide (ADN)
WO2020060451A1 (en) 2018-09-17 2020-03-26 Totalförsvarets Forskningsinstitut Synthesis of ammonium dinitramide (adn)
US12037241B2 (en) 2018-09-17 2024-07-16 Totalförsvarets Forskningsinstitut Synthesis of ammonium dinitramide (ADN)

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EP3099652B1 (en) 2018-12-26
SE537747C2 (en) 2015-10-13
US20170008768A1 (en) 2017-01-12
EP3099652A1 (en) 2016-12-07
EP3099652A4 (en) 2017-07-26
SE1400043A1 (en) 2015-07-31
US10112834B2 (en) 2018-10-30

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