# US 4,396,412 A · Ion exchanger fertilizers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,396,412 A - Document ID: US4396412A - Status: Granted - Kind: A - Application number: 06/265,275 - Filed: 1981-05-20 - Granted: 1983-08-02 - Earliest claimed: 1980-05-29 - Assignees: Bayer Aktiengesellschaft - Inventors: Harold Heller; Herbert Corte - Web page: https://patentgrep.com/patent/US4396412A ## CPC - C05G 5/40: Fertilisers incorporated into a matrix - C05D 9/00: Other inorganic fertilisers - Y10S 71/02: Chelating agent - Y10S 71/903: Soil conditioner - Y10S 71/904: Carrier - C05G: MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS (organic fertilisers containing added bacterial cultures, mycelia, or the like C05F11/08; organic fertilisers containing plant vitamins or hormones C05F11/10); FERTILISERS CHARACTERISED BY THEIR FORM - C05D: INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract Process for improving the plant growth with the aid of ion exchanger fertilizers, comprising adding to the growth medium weakly basic anion exchangers which are charged with anionic chelate complexes of micronutrient cations and macronutrient and micronutrient anions to the extent of at least 60% of their total capacity together with weakly acid cation exchangers charged with nutrient cations to the extent of at least 60% of their total capacity. Furthermore fertilizers comprising a mixture of weakly basic anion exchanger which are charged with anionic chelate complexes of micronutrient cations and other micronutrient and macronutrient anions to the extent of at least 60% of their total capacity and weakly acid cation exchangers which are charged with nutrient cations to the extent of at least 60% of their total capacity. ## Claims ### Claim 1 A process for improving the plant growth with the aid of ion exchanger fertilisers, comprising adding to the growth medium one or more weakly basic anion exchanger(s) which is (are) charged with anionic chelate complexes of micronutrient cations and macronutrient and micronutrient anions to the extent of at least 60% of its (their) total capacity together with one or more weakly acid cation exchanger(s) charged with nutrient cations to the extent of at least 60% of its (their) total capacity. ### Claim 2 (depends on 1) The process of claim 1, wherein the weakly basic anion exchanger(s) and the weakly acid cation exchanger(s) are each charged with nutrient ions to the extent of at least 80% of their total capacity. ### Claim 3 (depends on 1) A process according to claim 1, wherein the highly charged weakly basic and weakly acid ion exchangers are employed in a ratio such that the amount of weakly acid groups is 10 to 90%, relative to the sum of weakly basic groups and weakly acid groups. ### Claim 4 (depends on 3) A process according to claim 3, characterised in that the highly charged weakly basic and weakly acid ion exchangers are employed in a ratio such that the amount of weakly acid groups is 10 to 50%, relative to the sum of weakly basic groups and weakly acid groups. ### Claim 5 (depends on 1) A process according to claim 1, wherein the ion exchanger fertilizer is applied in an amount of between 0.001 and 0.1 liters of ion exchanger per liter of plant growth medium. ### Claim 6 (depends on 1) A process according to claim 1, wherein the ion exchanger fertiliser is applied in an amount of between 0.002 and 0.05 liters of ion exchanger per liter of plant growth medium. ### Claim 7 A fertiliser on the basis of a mixture of one or more weakly basic anion exchangers charged with anionic chelate complexes of micronutrient cations and other micronutrient and macronutrient anions, and one or more cation exchangers charged with nutrient cations, comprising a mixture of weakly basic anion exchanger(s) which is (are) charged with anionic chelate complexes of micronutrient cations and other micronutrient and macronutrient anions to the extent of at least 60% of its (their) total capacity and weakly acid cation exchanger(s) which is (are) charged with nutrient cations to the extent of at least 60% of its (their) total capacity. ### Claim 8 (depends on 7) A fertiliser of claim 7, wherein the weakly basic anion exchanger(s) and the weakly acid cation exchanger(s) are each charged with nutrient ions to the extent of at least 80% of their total capacity. ### Claim 9 (depends on 7) The fertiliser of claim 7, wherein the amount of weakly acid groups is 10 to 90%, relative to the sum of weakly basic groups and weakly acid groups. ### Claim 10 (depends on 7) The fertiliser of claim 7, wherein the amount of weakly acid groups is 10 to 50%, relative to the sum of weakly basic groups and weakly acid groups. ### Claim 11 (depends on 7) The fertiliser of claim 7, wherein 0.25 to 25% of the total capacity of the weakly basic anion exchangers charged with anionic chelate complexes of micronutrient cations and micronutrient and macronutrient anions is taken up by the anionic chelate complexes. ### Claim 12 (depends on 7) The fertiliser of claim 7, wherein 0.5 to 15% of the total capacity of the weakly basic anion exchangers charged with anionic chelate complexes of micronutrient cations and micronutrient and macronutrient anions is taken up by the anionic chelate complexes. ### Claim 13 (depends on 7) A fertiliser according to claim 7 which also contains a strongly basic and/or strongly acid ion exchanger charged with nutrient ions. ### Claim 14 (depends on 13) A fertiliser according to claim 13, wherein the strongly basic groups amount to up to 80% of the total anion exchange capacity and/or the strongly acid groups amount to up to 80% of the total cation exchange capacity. ### Claim 15 (depends on 14) A fertiliser according to claim 14, characterised in that the strongly basic groups amount to up to 50% of the total anion exchange capacity and/or the strongly acid groups amount to up to 50% of the total cation exchange capacity.