Preparation and use of iminodisuccinic acid ammonium metal salts

Abstract

The invention relates to a process for the preparation of iminodisuccinic acid ammonium metal salts, characterized in that, in a first stage, maleic anhydride (MA), alkali metal hydroxide and water are mixed in the molar ratio of 2:0-3:5-30 and then ammonia is metered in in the ratio MA:ammonia 2:1.5-8, in order to obtain iminodisuccinic acid ammonium salts which, in a second stage, are reacted with metal oxides, metal hydroxides (and) or other metal salts or their mixtures to give iminodisuccinic acid ammonium metal salts of the formula 8, IDA(NH 4 ) x (Na) y (K) z (Me) m .(NH 3 ) n   Formula 8 in which IDA represents iminodisuccinic acid anion, x=0.1-3.9 y=0-3 z=0-3 m=0.1-2 n=0-6 and Me represents metals of the IInd, IIIrd and IVth main groups and of the Ist to VIIIth subgroups as well as metals of the lanthanide series, of the Periodic Table, which can occur in the oxidation states 1, 2, 3 or 4, the compounds themselves and their intermediates, and the use.

1 - 9 . (canceled)  
   
   
       10 . Iminodisuccinic acid ammonium salts of the formula 7,  
       IDA(NH 4 ) y (H) y   Formula 7  wherein x=2-4 and y=0-2.    
   
   
       11 . A Process for the preparation of iminodisuccinic acid ammonium metal salts, comprising: 
 in a first stage, mixing maleic anhydride (MA) and water in a molar ratio of 2:5-30 and then metering ammonia into the resulting reaction mixture in a molar ratio of MA:ammonia 2:1.5-8, in order to obtain iminodisuccinic acid ammonium salts according to  claim 10     in a second stage, reacting the iminodisuccinic acid ammonium salts with metal oxides, metal hydroxides or metal salts or their mixtures to give iminodisuccinic acid ammonium metal salts of the formula 8,      IDA(NH 4 ) x (Na) y (K) z (Me) m .(NH 3 ) n   Formula 8    in which    x=0.1-3.9    y=0-3    z=0-3    m=0.1-2    n=0-6    and    Me represents metals of the IInd, IIIrd and IVth main groups and of the Ist to VIIIth subgroups as well as metals of the lanthanide series of the Periodic Table, which can occur in the oxidation states 1, 2, 3 or 4.    
   
   
       12 . Iminodisuccinic acid ammonium salts of the formula 6  
       IDA(NH 4 ) x (Na) y (K) z (H) m   Formula 6  wherein    x=0.1-4    y=0-3    z=0-3    m=0-2.    
   
   
       13 . A method of increasing the availability of trace elements in an agricultural product comprising: 
 providing an agricultural product comprising an iminodisuccinic acid ammonium metal salt according to formula (8)      IDA(NH 4 ) x (Na) y (K) z (Me) m .(NH 3 ) n   Formula 8    in which    x=0.1-3.9    y=0-3    z=0-3    m=0.1-2    n=0-6    and    Me represents metals of the IInd, IIIrd and IVth main groups and of the Ist to VIIIth subgroups as well as metals of the lanthanide series of the Periodic Table, which can occur in the oxidation states 1, 2, 3 or 4.    
   
   
       14 . The method according to  claim 13  wherein the agricultural product is a fertilizer.  
   
   
       15 . The method according to  claim 13  wherein the agricultural product is a slug and snail pellet.  
   
   
       16 . An agricultural product comprising: 
 an iminodisuccinic acid ammonium metal salt according to formula (8)      IDA(NH 4 ) x (Na) y (K) z (Me) m .(NH 3 ) n   Formula 8    in which    x=0.1-3.9    y=0-3    z=0-3    m=0.1-2    n=0-6    and    Me represents metals of the IInd, IIIrd and IVth main groups and of the Ist to VIIIth subgroups as well as metals of the lanthanide series of the Periodic Table, which can occur in the oxidation states 1, 2, 3, or 4.    
   
   
       17 . The agricultural product of  claim 16  wherein the agricultural product is a fertilizer.  
   
   
       18 . The agricultural product of  claim 16  wherein the agricultural product is a slug and snail pellet.  
   
   
       19 . A solution for use in providing surface coloring to ceramics comprising: 
 one or more iminodisuccinic acid ammonium salts.    
   
   
       20 . The solution according to  claim 19  wherein the iminodisuccinic acid ammonium salts is according to formula 6  
       IDA(NH 4 ) x (Na) y (K) z (H) m   Formula 6  wherein    x=0.1-4    y=0-3    z=0-3    m=0-2.    
   
   
       21 . The solution according to  claim 19  wherein the iminodisuccinic acid ammonium salts is according to formula 7  
       IDA(NH 4 ) y (H) y   Formula 7  wherein x=2-4 and y=0-2.    
   
   
       22 . A solution for use in providing surface coloring to ceramics comprising: 
 iminodisuccinic acid ammonium salts of the formula 7,      IDA(NH 4 ) y (H) y   Formula 7    wherein x=2-4 and y=0-2.    
   
   
       23 . A solution for use in providing surface coloring to ceramics comprising: 
 iminodisuccinic acid ammonium salts of the formula 6      IDA(NH 4 ) x (Na) y (K) z (H) m   Formula 6    wherein    x=0.1-4    y=0-3    z=0-3    m=0-2.    
   
   
       24 . A process for providing surface coloring to ceramics comprising: 
 providing iminodisuccinic acid ammonium salts to a ceramic article to be colored.    
   
   
       25 . The process of  claim 24  wherein the iminodisuccinic acid ammonium salt is that according to formula 6  
       IDA(NH 4 ) x (Na) y (K) z (H) m   Formula 6  wherein    x=0.1-4    y=0-3    z=0-3    m=0-2.    
   
   
       26 . The process of  claim 24  wherein the iminodisuccinic acid ammonium salt is that according to formula 7 
 iminodisuccinic acid ammonium salts of the formula 7,      IDA(NH 4 ) y (H) y   Formula 7    wherein x=2-4 and y=0-2.    
   
   
       27 . An agricultural product comprising iminodisuccinic acid ammonium salts of formula (8) prepared according to the process of  claim 11 .  
   
   
       28 . The agricultural product of  claim 27  wherein the agricultural product is a fertilizer.  
   
   
       29 . The agricultural product of  claim 27  wherein the agricultural product is a slug and snail pellet.