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US 2022/0177498 A1Published application
Crystalline form of l-glufosinate ammonium salt and process for production thereof
AssigneeUpl Ltd
InventorsPrashant Vasant Kini, Chandrasekhar Dayal Mudaliar, Ashishkumar Ravindra Mishra, Santosh Ganpat Shelke
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Abstract
The present disclosure relates to a novel crystalline form of L-glufosinate ammonium salt and a process for preparation thereof. The present disclosure also provides compositions comprising said form and a method for the control of undesired plant growth using said compositions.
Claims19
A crystalline form of L-glufosinate ammonium salt characterized by one or more of
- an X-ray powder diffractogram pattern having peaks at 9.0, 11.6, 13.1, 14.1, 17.6, 18.2, 18.9, 19.5, 22.4, 23.4, 26.0, 31.1, 33.3 and 36.3 degree 2θ±0.2 degree 2θ;
- an X-ray powder diffractogram pattern having at least three peaks selected from the group consisting of 9.0, 11.6, 13.1, 14.1, 17.6, 18.2, 18.9, 19.5, 22.4, 23.4, 26.0, 31.1, 33.3 and 36.3 degree 2θ±0.2 degree 2θ;
- an X-ray powder diffractogram pattern substantially as depicted in FIG. 1;
- a differential Scanning calorimetry thermogram having at least two characteristic thermal events in the range of 65-115° C., 185-210° C. and 210-235° C.;
- a differential Scanning calorimetry thermogram substantially as depicted in FIG. 2;
- and
- combinations thereof.
4 more elements
A process for producing a compound of Formula (I)
- said process comprising:
- a) suspending an acid addition salt a compound of Formula (II), wherein A- is an anion, in an alcohol solvent to form a suspension;
- b) contacting the suspension with gaseous ammonia until complete dissolution of the compound of Formula (II) to form a solution;
- and
- c) subjecting the solution to conditions to precipitate the compound of Formula (I).
2 more elements
A process for preparation of a compound of Formula (I) comprising:
- a) contacting a suspension comprising an acid addition salt compound of Formula (II), wherein A- is an anion, in an alcohol solvent with gaseous ammonia under nonaqueous conditions to form a solution;
- and
- b) subjecting the solution to conditions to precipitate the compound of Formula (I).
Dependencies are inferred from the claim text.