ES358868A1 - Process for the manufacture of chloride-free high strength npk fertilisers - Google Patents
Process for the manufacture of chloride-free high strength npk fertilisersInfo
- Publication number
- ES358868A1 ES358868A1 ES358868A ES358868A ES358868A1 ES 358868 A1 ES358868 A1 ES 358868A1 ES 358868 A ES358868 A ES 358868A ES 358868 A ES358868 A ES 358868A ES 358868 A1 ES358868 A1 ES 358868A1
- Authority
- ES
- Spain
- Prior art keywords
- acid
- chloride
- phosphoric acid
- reaction
- manufacture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D9/00—Nitrates of sodium, potassium or alkali metals in general
- C01D9/06—Preparation with gaseous nitric acid or nitrogen oxides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/082—Compounds containing nitrogen and non-metals and optionally metals
- C01B21/083—Compounds containing nitrogen and non-metals and optionally metals containing one or more halogen atoms
- C01B21/084—Compounds containing nitrogen and non-metals and optionally metals containing one or more halogen atoms containing also one or more oxygen atoms, e.g. nitrosyl halides
- C01B21/0842—Halides of nitrogen oxides
- C01B21/0846—Nitrosyl chloride
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Fertilizers (AREA)
Abstract
A chloride-free NPK fertilizer, having a content of (N+K 2 O+P 2 O 5 ) exceeding 43À5% by weight, is prepared by reacting solid potassium chloride with liquid and/or gaseous dinitrogen tetroxide at a temperature of at most 80 C. in a reaction mixture comprising phosphoric acid or a mixture of phosphoric acid and nitric acid, the phosphoric acid being in excess of the nitric acid, the acid medium having a strength of at least 8N, the phosphoric acid being counted as a 1À5-basic acid neutralizing the resulting acid/KNO 3 suspension with ammonia after removal of the nitrosyl chloride produced, e.g. by blowing it out with nitrogen or oxygen, and shaping and drying the resultant mixture. Other salts, e.g. NH 4 NO 3 , may be added to the reaction mixture before, during or after neutralization with ammonia to give a mixed fertilizer having a desired N:K 2 O :P 2 O 3 ratio. The nitric acid reactant may be formed in situ, by the reaction of hydrochloric acid with liquid and/or gaseous N 2 O 4 .N 2 O 4 may be recovered and recycled by means of the reaction: the Cl 2 being separated from the N 2 O 4 , and this N 2 O 4 recycled.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT906067A AT277291B (en) | 1967-10-06 | 1967-10-06 | Process for the production of chloride-free, high percentage NPK fertilizers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES358868A1 true ES358868A1 (en) | 1970-05-16 |
Family
ID=3610854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES358868A Expired ES358868A1 (en) | 1967-10-06 | 1968-10-05 | Process for the manufacture of chloride-free high strength npk fertilisers |
Country Status (9)
| Country | Link |
|---|---|
| AT (1) | AT277291B (en) |
| BE (1) | BE721880A (en) |
| BG (1) | BG16031A3 (en) |
| ES (1) | ES358868A1 (en) |
| FR (1) | FR1582500A (en) |
| GB (1) | GB1224222A (en) |
| NL (1) | NL6813770A (en) |
| NO (1) | NO118071B (en) |
| SE (1) | SE330391B (en) |
-
1967
- 1967-10-06 AT AT906067A patent/AT277291B/en not_active IP Right Cessation
-
1968
- 1968-08-26 GB GB40776/68A patent/GB1224222A/en not_active Expired
- 1968-09-07 BG BG010629A patent/BG16031A3/en unknown
- 1968-09-16 SE SE12460/68A patent/SE330391B/xx unknown
- 1968-09-16 NO NO3650/68A patent/NO118071B/no unknown
- 1968-09-26 NL NL6813770A patent/NL6813770A/xx unknown
- 1968-10-02 FR FR1582500D patent/FR1582500A/fr not_active Expired
- 1968-10-04 BE BE721880D patent/BE721880A/xx unknown
- 1968-10-05 ES ES358868A patent/ES358868A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1582500A (en) | 1969-09-26 |
| BE721880A (en) | 1969-04-04 |
| BG16031A3 (en) | 1972-05-20 |
| AT277291B (en) | 1969-12-29 |
| NO118071B (en) | 1969-11-03 |
| GB1224222A (en) | 1971-03-03 |
| SE330391B (en) | 1970-11-16 |
| NL6813770A (en) | 1969-04-09 |
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