Coated particles of a glumatic acid N,N-diacetate chelating agent
View Patent ↗Process to prepare coated particles containing a particle and a coating, wherein the particle contains glutamic acid N,N-diacetic acid or a (partial) salt thereof of the formula HnYm-GLDA, wherein Y is a cation selected from the group of sodium, potassium, lithium, and mixtures thereof, n+m=4, in which the particle is made from a solution containing glutamic acid N,N-diacetic acid or a partial salt thereof that has a pH of between 4 and 11, and subsequently or simultaneously the coating is applied on the particle, to an intermediate particle of HnYm-GLDA, wherein n is 0.1-3.2 and m is 0.8-3.9, the coated particle obtainable with the process, and the use thereof.
1. Process to prepare coated particles containing a particle and a coating, wherein the particle comprises a partial salt of glutamic acid N,N-diacetic acid of the formula HnYm-GLDA, wherein Y is a cation, selected from the group of sodium, potassium, lithium, and mixtures thereof, n+m=4, and wherein 0.1 to 3.2 hydrogen cations are available per GLDA anion in which the particle is made from a solution containing the partial salt of glutamic acid N,N-diacetic acid that has a pH of between 4 and 11 when measured as a 1% solution in water, and subsequently or simultaneously the coating is applied on the particle.
2. The process to prepare coated particles of claim 1 comprising the steps of first making a particle containing HnYm-GLDA by preparing a solution containing GLDA having a pH of between 4 and 11 when measured as a 1% solution in water, and thereafter applying a drying step, and subsequently applying the coating thereon.
3. Coated particle containing a particle and a coating, wherein the particle comprises a partial salt of glutamic acid N,N-diacetic acid of the formula HnYm-GLDA, wherein Y is a cation, selected from the group of sodium, potassium, lithium, and mixtures thereof, n+m=4 and wherein 0.1 to 3.2 hydrogen cations are available per GLDA anion.
4. Coated particle of claim 3 additionally comprising a structurant.
5. Coated particle of claim 3 wherein the coating contains a compound of the group of scale-inhibiting additives, antiblocking agents, protective colloids, and other water-soluble polymers.
6. A detergent, an agricultural composition, an oil field composition or a water treatment composition comprising the coated particle of claim 3 .
7. Coated particle of claim 4 wherein the coating contains a compound of the group of scale-inhibiting additives, antiblocking agents, protective colloids, and other water-soluble polymers.
8. A detergent, an agricultural composition, an oil field composition or a water treatment composition comprising the coated particle of claim 4 .
9. A detergent, an agricultural composition, an oil field composition or a water treatment composition comprising the coated particle of claim 5 .