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US 6,638,619 B1Granted
Method for producing a granulate from a melt
AssigneeBASF SE
InventorsMelanie Brunner, Rudolf Erich Lorenz, Bernhard Maltry, Jörg Heilek
Life of this patent
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Abstract
A process for the production of tablet-shaped granular material from a melt, in which (i) a melt is prepared, (ii) the prepared melt is shaped to droplets, (iii) the droplets are deposited on a cooling surface, and (iv) the deposited droplets solidify to give the granular material, wherein the melt comprises an alcohol, and the melt has a melting point of 30° C. or above.
Claims14
A process for the production of tablet-shaped granular material from a melt, in which
- (i) a melt is prepared,
- (ii) the prepared melt is shaped to droplets,
- (iii) the droplets are deposited on a cooling surface, and
- (iv) the deposited droplets solidify to give the granular material, wherein the melt comprises an alcohol, and the melt has a melting point of 30° C. or above.
1 more element
A tablet-shaped granular material which can be produced by a process in which
- (i) a melt is prepared,
- (ii) the prepared melt is shaped to droplets,
- (iii) the droplets are deposited on a cooling surface, and
- (iv) the deposited droplets solidify to give the granular material, wherein the melt has a melting point of 30° C. or above and wherein the melt comprises an alcohol that is selected from the group consisting of:
- (a) an alcohol (B) which is prepared by a process which comprises the following stages (I) to (III):
- (I) reaction of at least one alkali or alkaline earth metal hydroxide with at least one alcohol (A) in at least one organic solvent (L) to give a mixture (G-I) comprising at least the alcohol (A), the solvent (L) and an alkoxide (AL);
- (II) reaction of at least one carbonyl compound of the general structure R—CO—R′ with at least one alkyne of the general structure R″—C═C—H and the mixture (G-I) obtained in stage (I) to give a mixture (G-II) comprising at least the alcohol (A), the solvent (L) and an unsaturated alcohol (B);
- (III) distillation of the mixture (G-II) obtained in stage (II) to give the at least one alcohol (B) and a mixture (G-III) comprising the solvent (L) and the alcohol (A),
- where the solvent (L) obtained in stage (III) and the alcohol (A) obtained in stage (III) are recycled into stage (I) as a mixture,
- (b) an alcohol (C) which is prepared by a process which comprises the following stages (I) to (III′):
- (I) reaction of at least one alkali or alkaline earth metal hydroxide with at least one alcohol (A) in at least one organic solvent (L) to give a mixture (G-I) comprising at least the alcohol (A), the solvent (L) and an alkoxide (AL);
- (II) reaction of at least one carbonyl compound of the general structure R—CO—R′ with at least one alkyne of the general structure R″—C≡C—H and the mixture (G-I) obtained in stage (I) to give a mixture (G-II) comprising at least the alcohol (A), the solvent (L) and an unsaturated alcohol (B);
- (II′) hydrogenation of at least one unsaturated alcohol (B) in the mixture (G-II) obtained from stage (II) to give a mixture (G-II′) comprising at least one hydrogenated alcohol (C), the alcohol (A) and the solvent (L);
- (III′) distillation of the mixture (G-II′) to give the at least one alcohol (C) and a mixture (G-III′) comprising the solvent (L) and the alcohol (A),
- where the solvent (L) obtained in stage (III′) and the alcohol (A) obtained in stage (III′) are recycled into stage (I) as a mixture, and
- (c) a mixture of two or more thereof.
13 more elements
Dependencies are inferred from the claim text.