• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1473403 Ferric hydroxide SOC ITALIANA RESINE SIR SpA 29 July 1974 [26 Sept 1973] 33442/74 Heading C1A Compositions useful as soil modifiers and fertilizers are prepared from waste material, essentially ferrous sulphate heptahydrate from the manufacture of titanium dioxide from ilmenite slags by the sulphate process, by thoroughly contacting the waste materials in the solid phase with a compound(s) of oxides, hydroxides or carbonates of alkali or alkaline earth metals or ammonium carbonate, either alone or in admixture in an ore, to obtain a conversion reaction product consisting of one or more of alkali metal, ammonium or alkaline earth metal sulphates and ferrous hydroxide and submitting the product to oxidation by treatment with oxygen at 20-80‹ C. until at least 90% of the ferrous hydroxide is converted to ferric hydroxide. The waste material may be of particle size up to 3 mm. and the ore compound from 0À01 to 0À8 mm. The compounds may be potassium or ammonium carbonate or the oxides, hydroxides or carbonates of calcium or magnesium.
    公开号:SU890969A3
    申请号:SU742062776
    申请日:1974-09-25
    公开日:1981-12-15
    发明作者:Пикколо Луиджи；Кальканьо Бенадетто；Гирга Марчелло；Паолинелли Антонио
    申请人:Сочиета Италиана Резин С.И.Р.С.П.А. (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the processing of titanium dioxide production waste by the sulfate method into products used in agriculture. 6
    A known method of processing waste production of titanium dioxide, consisting mainly of the heptahydrate form of iron sulfate and used as soil modifiers 10 and fertilizers by the sulfate method Ш.
    The disadvantage of this method is the high toxicity of the resulting product due to the high content of impurities. 1S
    The closest in technical essence to the invention is a method of processing waste products of titanium dioxide containing heptahydrate forms of iron sulfate, by their 20 neutralization with sodium carbonate or calcium hydroxide, followed by melting of the product and using chilled melt as a coagulant [2]. 25
    However, this method is characterized by the impossibility of obtaining a product used as a soil and fertilizer modifier.
    The purpose of the invention is the conversion of contaminated heptahydrate of iron sulfate into a product used in agriculture, as a soil and fertilizer modifier.
    This goal is achieved in that the waste of titanium dioxide production by the sulfate method containing iron sulfate heptahydrate is neutralized by mixing a solid titanium production waste with a particle size of 0.1-3 mm at a temperature below the melting temperature with a reagent selected from the group of substances consisting of carbonate potassium, aluminum carbonate or oxide, hydroxide or calcium or magnesium carbonate with a particle size of 0.01-0.8 mm, taken in sufficient quantity to convert 90% iron sulfate heptahydrate to hydroxide Elez with oxidation pro-
    890969 4 products of neutralization with molecular oxygen at 20-80 ° С until 90% of the formed iron hydroxide is converted to ferric hydroxide.
    The resulting product is treated with concentrated sulfuric acid, taken in sufficient quantity to convert 40% of the indicated iron hydroxide to ferric sulfate, which improves the properties of the product used as fertilizer.
    Example. 200 g of iron sulfate (It), obtained as a by-product of the process of converting ilmenite to titanium dioxide, is mixed manually in a vertical cylindrical vessel with 67.5 g of calcium carbonate with a concentration of 98.5 wt.%. ' Iron sulfate (.II) has the following chemical composition, wt.%: FeSO 4 * 7НпО 88.6; MgSO 4 · 7H g 0 6.80; AIq (SO 4 ) g * <18Η α 0 0.8; MpBod-ZNdO 0.56; CaS0 4 * <X2HqO 0.26; TiOS0 4 0.18; chromium sulfate, vanadium, zirconium, hafnium and rare earth metals 0.01; free sulfuric acid 0.09; l ^ O 2.7.
    The grain size of iron (II) sulfate is 0.5-2 mm. Calcium carbonate is used in a finely ground state, with 80% of its grains having a value of less than 0.5 mm.
    The reagents mature in air in an 8 mm layer. The temperature during the development of the reaction reaches a maximum value of 41 ° C. The obtained product A. is subjected to grinding and test the modified properties of the soil structure in a known manner. The following distribution of components was established in a modified soil sample, wt.%: Clay 13.4, silt 58.6, sand 28. In the unmodified comparative soil, the following distribution, wt.%: Clay 40, silt 38, sand 22.
    The product A noted above is sprayed after grinding 86 g of 98 wt.% Sulfuric acid and allowed to mature for 24 hours at room temperature. The conversion of iron hydroxide to iron sulfate reaches 90 wt.%.
    The resulting product B is subjected to a percolation test and the distribution in the modified soil sample is determined under the described conditions. On modified soil, percolation of 310 mm of water is carried out for two hours.
    5 The following distribution was established on the modified soil sample, wt.%: Clay 4; silt 60; sand 36.
    权利要求:
    Claims (2)
    [1]
    10 claims
    1. A method of processing waste from the production of titanium dioxide by the sulfate method by neutralizing the latter
    15 of them and oxidation, followed by processing into a useful product, characterized in that, in order to convert contaminated iron sulfate heptahydrate into a product used in agriculture as a soil and fertilizer modifier, neutralization is carried out by mixing solid waste of titanium production with particle size tem25 0.1-3 mm at a temperature below the melting point with a reagent selected from the group of substances consisting of potassium carbonate, carbonate or aluminum oxide, hydroxide or carbonate of calcium or magnesium with 30 posted rum particles 0,01YU 8 mm, taken in kolychestve sufficient to convert 90% of ferrous sulfate heptahydrate in ferric hydroxide with oxidation products of neutralization with molecular oxygen at 20-80 ° C 35 to 90% conversion of the resulting ferric hydroxide in ferric hydroxide.
    [2]
    2. The method of pop. ^ characterized in that, with a view to improvement of the product properties Nia 40, obtained by oxidation as fertilizer, said product is treated with concentrated sulfuric acid, -vzyatoy in sufficient amount to convert 45 to 40% of said iron hydroxide into ferric sulfate.
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    同族专利:
    公开号 | 公开日
    DE2445800A1|1975-04-24|
    NL7411785A|1975-04-01|
    BR7408015D0|1975-07-15|
    JPS5057863A|1975-05-20|
    YU35558B|1981-04-30|
    US3936292A|1976-02-03|
    FR2244730B1|1976-12-31|
    CA1035593A|1978-08-01|
    FR2244730A1|1975-04-18|
    IT995512B|1975-11-20|
    AU475542B2|1976-08-26|
    GB1473403A|1977-05-11|
    JPS5514079B2|1980-04-14|
    MX3105E|1980-04-11|
    ZA744902B|1976-01-28|
    AU7224074A|1976-02-12|
    YU259474A|1980-10-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US824791A|1904-09-28|1906-07-03|Rudolf Jenkner|Insecticide-fertilizer.|
    US1294526A|1917-09-21|1919-02-18|Gerhard Nicolaas Vis|Manufacture of sodium carbonate and ammonium sulfate from bisulfate of soda.|
    US2529874A|1947-09-27|1950-11-14|Mellon Inst Of Ind Res|Process for manufacturing ammonium salts and magnetic iron oxide from solutions of ferrous salts|
    US2741876A|1952-09-09|1956-04-17|Rumianca Spa|Soil conditioner and method of making same|
    US2795495A|1953-10-24|1957-06-11|Rubrchemie Ag|Non-caking ammonium sulfate nitrate|
    US2798802A|1954-05-27|1957-07-09|Chemical Construction Corp|Method for the treatment of waste ferrous sulfate liquors|
    US2845332A|1954-09-24|1958-07-29|Jones & Laughlin Steel Corp|Production of ammonium sulfate and ferrous carbonate from ferrous sulfate-containing solutions|
    JPS4842677A|1971-09-29|1973-06-21|IT1039748B|1975-07-08|1979-12-10|Sir Soc Italiana Resine Spa|CONDITIONERS FOR THE GROUND|
    US4077794A|1977-03-08|1978-03-07|Societa' Italiana Resine S.I.R. S.P.A.|Method for the manufacture of soil modifiers from waste materials of the manufacture of titanium dioxide|
    US4566896A|1980-10-29|1986-01-28|Union Camp Corporation|Method and media for stimulating growth in foliage plants|
    NL8701540A|1987-07-01|1989-02-01|Gerard Willemsen|PREPARATION FOR IMPROVING THE VITALITY OF ALREADY IMPROVED TREES .|
    GR880100804A|1988-11-29|1990-12-31|Willemsen Gerard|Soil stabilizer and method for improving soil|
    ES2049127B1|1991-06-13|1994-10-01|Tioxide Espa A S A|CORRECTOR OF MICROELEMENTS LAWS FOR AGRICULTURAL SOILS AND PROCEDURE FOR ITS PREPARATION.|
    GB201115836D0|2011-09-13|2011-10-26|Tioxide Europ Sas|Magnesium sulphate|
    WO2015173396A1|2014-05-16|2015-11-19|Sachtleben Pigment Gmbh|Sulfur fertilizer|
    DE102015119480A1|2015-11-11|2017-05-11|Fels-Werke Gmbh|Fertilizer mixture and process for its preparation|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    IT29397/73A|IT995512B|1973-09-26|1973-09-26|COMPOSITIONS SUITABLE FOR THEM USED IN AGRICULTURE AS SOIL MODIFIERS AND AS FERTILIZERS|
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