• 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:

    公开号:SU959619A3
    申请号:SU802891754
    申请日:1980-03-11
    公开日:1982-09-15
    发明作者:Шредтер Клаус；Градль Райнхард；Элерс Клаус-Петер；Шайбитц Вольфганг
    申请人:Хехст Аг (Фирма)；
    IPC主号:
    专利说明:

    This invention relates to methods for purifying non-organic chemistry products, in particular phosphoric acid, that can be used in the chemical industry.
    In the purification of phosphoric acid by extraction with solvents such as. alcohols, esters and ethers, ketones, in the presence of sulfuric acid, phosphoric acid passes into the organic phase, and such compounds in phosphoric acid as iron, aluminum, magnesium, calcium, minor quantities of heavy metals (copper, cadmium, nickel, zinc, chromium ) is separated in the form of aqueous solutions or suspensions of sulfates and phosphates, which are called raffinates. The discharge of these refined products into wastewater is impossible without additional purification.
    The closest in technical essence and the achieved result to the proposed method is the conversion of the refractories formed during the purification of phosphoric ACID by solvent extraction into a solid product, which includes processing them with a solid calcium-containing reagent, filtering the reaction slurry and separating the precipitate. In the known method, quicklime fIj is used as a calcium-containing reagent.
    The disadvantages of the known method are that in its implementation
    10 it is necessary that the raffinate has a high water content so that after evaporation of a part of the water due to the heat absorbed during the interaction with. quick lime, a solid was obtained.
    15 Technical implementation of the known method due to severe clogging and mechanical wear of reactors is dangerous and unreliable.
    In addition, the solid product that is stored is neutral. But at the neutral point, some of the harmful substances are so soluble that the filtrate has unacceptably high concentrations of these compounds. The aim of the invention is to increase the degree of neutralization of the raffinates. water, so that after reacting with the calcium retaining agent, to obtain a suspension containing 2 O-4 O wt.% solid matter, and altsiysoderzhaschy. the reagent is introduced in such an amount that the separated precipitate has a pH of 9-14, and filtration is carried out at pH 5-8. Calcium hydroxide or quicklime is used as calcium reagent. To establish the required water content in the refineries, a filter is used after filtration of the reaction pulp. The method is carried out as follows. In the raffinates to be decontaminated, the water content is first set so that, after reacting with the calcium-containing reagent, a suspension is able to be filtered. Then, so much solid calcium-containing reagent is added to the raffinates, so that the precipitate formed after filtration of the reaction slurry has a pH of 9-14. Before the interaction of the reaction slurry is complete and the pH reaches 9-14, the filtration is carried out at pH 5-8. In order to establish a specific water content in the raffinate, the filtrate is completely or partially recycled after filtration of the reaction pulp. In this case, the water content is chosen such that after the reaction, the raffinates contain 2O-4O wt.% Solids. The amount of calcium-containing reagent to obtain a precipitate of the reaction pulp, the 10% aqueous suspension of which has a pH of 9-14, was determined by preliminary experiments. Filtration is carried out in vacuum filters or in Filters under pressure, in continuous drum or belt filters, followed by cleaning of the filter cloth. Good filtration performance is achieved by filtering the reaction pulp at a pH close to the neutral point (5–8). Example 1. In a container, where 15O l / h of raffinate is continuously fed after kstractional cleaning of sour with amyl alcohol, containing, wt.%:% O58, S O4 22.3 8.6 O, 9 0.29 0.21 0,013 is done 4OO l / h of recirculating filtt and 80 kg / h of solid calcium hydroxide. Hot reaction slurry with temperaura enters the filter tank, where it is filtered through a vacuum drum filter at pH 6. With a filtration performance of 810 l / h hourly, EOT of 230 kg of sediment, which has an OO pH of 11. At elution The amount of sediment, (10O g of solid substance per 1000 g of NlO) contains eluate in millionths: 10 0, ОО5 to 0.01 0.01 Example 2. Under the conditions of example 1, 240 l / h of the raffinate mixture with recycled filtrate are treated ( 160 l / h) pulp of calcium hydroxide in water. With a filtration capacity of 6OO l / h, a wet spray is obtained. Example 3. Under the conditions of Example 1, a mixture of raffinate and recycled filtrate is treated with 65 kg / h of solid calcium hydroxide. When elution of the solid residue in the eluate contains, millionths: P2.05-150 Cd 0.02 ChIO, O4 Cr 0.31 Thus, the presented experimental data show that only by processing the raffinate by the proposed method can a precipitate be obtained, which is well filtered and filtration time is so dehydrated that it can be transported. The advantage of the proposed method also lies in the fact that during the purification of acid raffinates into solids, such harmful so-called Odin-foujauscheid media, such as Cdi SG, are harmful. 2i, FO nepeiOflHT with such difficult-to-dissolve compounds that when yus unacceptably high concentrations of rare substances in the flowing filtranton waters of the Formula were not formed, the method of transferring raffinato, Zucchticus and cleaning was cleaned by a cleaner cleaned cleaner. mi, into a solid product / including processing them with a solid calcium-containing reagent, traction the reaction pulp and separating the precipitate, so that in order to increase the degree of neutralization of the raffinate, Tanna pour in this water content. & i6 so that, after interacting with the caloric acid peareiiTOM, it is possible to obtain a suspension containing 2O-I1O in an "c.% solid substance, and the calcium-containing reagent is introduced in such a thickness to separate it. The precipitate had a pH of 9-14 and are filtered. pH 5-8 .: 2. The method according to claim 1, r.t. l and h ay y and i with the fact that as kalysh-containing reagent is used kalia oxide or soft lime. 3. Method according to paragraphs. 1 and 2, that is, with the fact that it was established for the purpose of establishing. the required water in the refins is used by the filtrate after filing the regional pulp. Sources of evidence that have been taken into account for 1FI of the examination 1. Inadequate application for the Federal Republic of Germany hfr N 2657189, cl. From 01 to 25/46, 1976 (prototype).
    权利要求:
    Claims (3)
    [1]
    1. The method of converting the raffinates formed during the purification of phosphoric acid by solvent extraction into solid. product, including the processing of their solid smoke with a calcium-containing reagent, filtration, reaction pulp and sedimentation, such as with the aim of increasing the degree of neutralization of raffinates, 20 are preliminarily installed in them a water content such that, after reacting with a calcium-containing reagent, a suspension is obtained containing 20-40 wt.% solids, and the calcium-containing reagent is introduced in such a quantity that the separated precipitate has a pH of 9-14, and the filtration is carried out with 1 pH 5 -8.
    [2]
    2. The method according to π. 1, with the fact that as calcium {containing reagent, calcium hydroxide or quicklime is used.
    [3]
    3. The method according to PP. 1 and 2, characterized in that in order to establish the required water content in the raffinates, the filtrate is used after filtering the reaction pulp.
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    同族专利:
    公开号 | 公开日
    MA18768A1|1980-10-01|
    PH15387A|1982-12-23|
    AT1139T|1982-06-15|
    IE800497L|1980-09-12|
    JPS55124591A|1980-09-25|
    IL59546A|1983-09-30|
    ZA801407B|1981-04-29|
    DD149795A5|1981-07-29|
    DE2909572A1|1980-09-25|
    US4279876A|1981-07-21|
    IE49648B1|1985-11-13|
    DE3060486D1|1982-07-22|
    FI67069B|1984-09-28|
    CA1136830A|1982-12-07|
    MX153241A|1986-09-02|
    EP0017741A1|1980-10-29|
    FI67069C|1985-01-10|
    FI800729A|1980-09-13|
    DK151217B|1987-11-16|
    BR8001427A|1980-11-11|
    JPS6044998B2|1985-10-07|
    DK151217C|1988-06-27|
    ES487988A1|1980-07-01|
    EP0017741B1|1982-06-02|
    DK104380A|1980-09-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3375066A|1963-08-24|1968-03-26|Yawata Chem Ind Co Ltd|Process for the continuous production of gypsum and iron oxide from waste sulfuric acid pickle liquor and a calcium compound|
    JPS5146679B2|1973-03-23|1976-12-10|
    GB1485067A|1975-07-25|1977-09-08|Tioxide Group Ltd|Effluent treatment process|
    JPS5542925B2|1976-04-16|1980-11-04|
    DE2657189B2|1976-12-17|1980-02-07|Hoechst Ag, 6000 Frankfurt|Process for the purification of NaB process phosphoric acid|
    DE2657190C2|1976-12-17|1982-11-04|Hoechst Ag, 6000 Frankfurt|Process for purifying wet process phosphoric acid|
    DE2657180C3|1976-12-17|1980-06-04|Continental Gummi-Werke Ag, 3000 Hannover|Method for dismantling and installing elastic bearing bodies for supporting building structures and structural parts and bearing bodies for carrying out the method|DE3135801A1|1981-09-10|1983-03-24|Hoechst Ag, 6000 Frankfurt|METHOD FOR TREATING EXTRACTION RESIDUES OF PHOSPHORIC ACID CLEANING|
    DE3502215A1|1985-01-24|1986-07-24|Hoechst Ag|METHOD FOR CONVERTING RESIDUES CONTAINING HEAVY METALS IN SOLID LANDSCAPEABLE PRODUCTS|
    DE3522822A1|1985-06-26|1987-01-02|Hoechst Ag|METHOD FOR PROCESSING RESIDUES CONTAINING HEAVY METALS FROM THE PURIFICATION OF RAW PHOSPHORIC ACIDS|
    JPS6222296U|1985-07-25|1987-02-10|
    JPH0522633Y2|1985-12-17|1993-06-10|
    US4781905A|1986-05-30|1988-11-01|Yu Ming Jiang|Process for producing phosphoric acid and/or phosphates from wet-process phosphoric acid and an extractant therein|
    DE3710804A1|1987-03-31|1988-10-20|Basf Ag|METHOD FOR THE CLEANING AND DISPOSAL OF SOOT AND ASHYWOOD|
    US4783328A|1987-12-14|1988-11-08|Fmc Corporation|Utilization of phosphourus containing by-products|
    EP0375653A3|1988-12-23|1991-03-20|Perlmooser Zementwerke Aktiengesellschaft|Process for the treatment of waste|
    DE3913853A1|1989-04-27|1990-10-31|Hoechst Ag|METHOD FOR PROCESSING PHOSPHORIC ACID|
    CA2063395A1|1989-07-14|1991-01-15|Fritz Jung|Process for rendering inert and/or immobilizing enviromentally harmful substances|
    JPH0346696U|1989-09-01|1991-04-30|
    GB9124353D0|1991-11-15|1992-01-08|Albright & Wilson|Immobilisation of metal contaminants from a liquid to a solid metal|
    DE102007011972B4|2007-03-09|2010-04-22|Oase Gmbh|Surface suction for ponds or the like|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19792909572|DE2909572A1|1979-03-12|1979-03-12|METHOD FOR CONVERTING EXTRACTION RESIDUES FROM PHOSPHORIC ACID CLEANING IN SOLID DEPOSITE PRODUCTS|
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