• 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:
    The invention relates to wastewater treatment methods and can be used in chemical industry, in particular in the production of yellow phosphorus. The aim of the invention is the possibility of separating yellow phosphorus from wastewater. The wastewater produced by yellow phosphorus is filtered on a centrifugal filter at 50-70 ° C, pH 0.5-4.0. After filtration, the water containing phosphorus is settled for 30-60 minutes and a yellow phosphorus is obtained. The water separated from yellow phosphorus is treated with an oxidizing agent — air or a white liquor — and neutralized with calcium metasilicate, which is used as slag from phosphoric furnaces. 1 hp f-ly.
    公开号:SU1440341A3
    申请号:SU813340998
    申请日:1981-10-09
    公开日:1988-11-23
    发明作者:Дисковски Херберт；Краузе Йоханнес；Мандельков Дитрих
    申请人:Хехст Аг (Фирма)；
    IPC主号:
    专利说明:

    4i
    O 00 NCa
     CH
    The invention relates to wastewater treatment and can be used in the chemical industry, in particular in the production of yellow phosphorus.
    The purpose of the invention is the possibility of separating yellow phosphorus from wastewater.
    The method is carried out as follows.
    Wastewater production of yellow phosphorus is filtered on a centrifugal filter at a temperature of 50-70 ° C, pH 0.5-4.0. After filtration, the water is settled for 30-60 minutes and pure yellow phosphorus is obtained. The water separated from phosphorus is treated with an oxidizing agent — air or bleaching liquor — and neutralized with calcium metascite.
    With a pH of 0.5-4.0 and a temperature of 50-70, the filter cake of the centrifugal filter consists of a small amount of yellow phosphorus and hexafluorosilicic acid salts and their hydrolysis products, and the whole yellow phosphorus passes into the filtrate along with the phosphoric acid. It is not recommended to carry out the process at a temperature below 50 ° C, since the time of the centrifugal filter, the time between the two necessary filter defenses and the amount of yellow phosphorus leaving the centrifugal filter with water decrease.
    Temperatures above 70 ° C do not simply reduce the time.
    Air or bleaching liquor is used as an oxidizing agent; calcium metasilicate is used as a neutralizing agent; phosphoric furnace slag is used as the oxidizing agent.
    Example 1. Sewage water from the production of yellow phosphorus is fed to a centrifugal filter and filtration is carried out at a pH of 2-3 and a temperature of 55 ° C; filter life is 8 hours. Water after filtration containing 290 mg / l of phosphorus is settled for 30 minutes in a sump. The water after settling contains 25 mg / l of phosphorus, To 50 the water is added 200 l / h of whitening liquor (NaOCl), the residual phosphorus content in water. mg / l. The water is then sent to a neutralized DI10, calcium metasilicate (granulated slab of phosphoric furnaces).
    0
    five
    0
    five
    0
    five
    0
    five
    0
    five
    Example 2: Filtration is subjected to wastewater at pH 2-3 and a temperature of 60 ° C. The water after filtration on a centrifugal filter contains 330 mg / l of phosphorus. Next, the waste water is treated as in example 1, the filter life is 8 hours,
    Example 3 A filtration on a centrifugal filter is subjected to water at a pH of 2-3 and a temperature of 70 ° C. After filtration, water contains 350 mg / l of phosphorus. Next, the water is defended for 60 minutes in the sump.
    The phosphorus content in water after settling Menepla 1 mg / l. The water is then sent to neutralize. The filter has a lifetime of 8 hours,
    Example 4; Water is treated at a pH of 1.5 at a temperature of 60 ° C on a centrifugal filter. The water after filtration contains 330 mg / l of phosphorus. Further purification is carried out according to Example 3. The filter has a service life of 8 hours,
    Example 5, Sewage water is filtered at pH 4 and a temperature of 55 ° C. The water after filtration contains 280 mg / l of phosphorus. Next, the treatment is carried out according to example 1, the service life of the filter is 7 hours,
    Example 6, the treatment is carried out according to example 5, but at pH 0.5, the filtered water contains 290 mg / l of phosphorus. Filter life 8 hours.
    Example 7 Sewage water is filtered at pH 2-3 and temperature 60 seconds. The filter runs for 8 hours. The filtered water contains 330 mg / l of phosphorus per liter and after 30 minutes of settling, 29 mg of phosphorus per liter.
    Next, the separated water is oxidized by blowing 2000 air into 50 mV4 of water. The phosphorus content in water is reduced to 1 mg / l. Then the water is neutralized.
    权利要求:
    Claims (2)
    [1]
    1. A wastewater treatment method for the production and processing of yellow phosphorus, including filtration in a centrifugal filter, characterized in that, in order to be able to release yellow phosphorus from wastewater, filtration is carried out at a temperature of 50-70 ° C, pH 0.5-4, 0 followed by separation of yellow phosphorus from the water by settling for
    314403414
    30-60 minutes with further processing
    [2]
    2. The method according to p. 1, about t of l and h of separated water with an oxidizing agent - air, and with the fact that metasilicate
    Home or bleach liquids and calcium neutrals are used in the form of pshak by the fusilization of calcium metasilicate forfor kilns.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU1440341A3|1988-11-23|Method of purifying waste water of yellow phosphorus production process
    US3947350A|1976-03-30|Process of preparing sewage sludge for dewatering
    JPH05237481A|1993-09-17|Treatment of waste water containing fluorine and silicon
    US5298169A|1994-03-29|Treatment of waste sulfuric acid by gypsum precipitation in a titanium dioxide process
    SU919989A1|1982-04-15|Yellow phosphorus purification method
    SU1502477A1|1989-08-23|Method of refining waste water of wet cleaning system of reaction gases
    SU1171433A1|1985-08-07|Method of extracting calcium fluoride from fluorine- and phosphorus-containing waste water
    FR2496630A1|1982-06-25|PREPARATION OF PHOSPHOROUS ACID FROM INDUSTRIAL REJECTS CONTAINING PHOSPHITES
    SU674986A1|1979-07-25|Method of obtaining calcium chloride
    SU1555292A1|1990-04-07|Method of modification of silicon-containing sorbent for removing ammonia from waste water
    SU447359A1|1974-10-25|A method of processing poor phosphorus sludge
    US3890428A|1975-06-17|Decolorization of ammonium thiosulfate
    SU988772A1|1983-01-15|Process for producing calcium
    JPH06171929A|1994-06-21|Production of white aluminum hydroxide
    SU1481209A1|1989-05-23|Method of treating waste water containing copper-ammonia complexes
    SU1248955A1|1986-08-07|Method of removing calcium and magnesium from potassium chloride
    SU893888A1|1981-12-30|Method of treatment of alkaline hypochlorite and acid waste water containing fluorine
    SU1298191A1|1987-03-23|Method for producing phosphoric acid
    SU1747394A1|1992-07-15|Method for purification sulfide containing sewage
    SU946619A1|1982-07-30|Method of cleaning foundry gases
    SU1339093A1|1987-09-23|Method of removing phosphates from waste water
    SU309570A1|1973-02-08|METHOD OF DECOMPOSITION OF CATALYZING (COMPLEX
    SU943207A1|1982-07-15|Process for purifying effluents from titanium dioxide production
    SU1495309A1|1989-07-23|Method of treating waste water
    SU1549915A1|1990-03-15|Method of purifying wet-process phosphoric acid from fluorine
    同族专利:
    公开号 | 公开日
    EP0049762B1|1984-04-11|
    DE3163086D1|1984-05-17|
    ZA816989B|1982-10-27|
    US4399037A|1983-08-16|
    EP0049762A1|1982-04-21|
    DE3038336A1|1982-05-27|
    DD201876A5|1983-08-17|
    CA1161579A|1984-01-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    NL274952A|1961-02-20|1900-01-01|
    DE1584851A1|1965-02-05|1969-11-13|Abend Dr Ing Rudolf|Process and system for the filtration of industrial waste water|
    US3480144A|1968-05-03|1969-11-25|Us Interior|Process for removing phosphorus from waste water|
    DE1808541C3|1968-11-13|1974-01-24|Knapsack Ag, 5033 Huerth-Knapsack|Method and device for processing waste water containing phosphorus sludge|
    US3634231A|1970-05-13|1972-01-11|Environmental Protection Agenc|Treatment of sewage digester supernatant liquor|
    DE2847531A1|1978-11-02|1980-05-22|Bayer Ag|METHOD FOR PURIFYING WATER CONTAINING PHOSPHOROSULATE ORGANIC SUBSTANCES|
    DE2854433C2|1978-12-16|1981-10-08|Uhde Gmbh, 4600 Dortmund|Process for the preparation of a P? 2? O? 5? -Containing fertilizer|DE3314248C2|1983-04-20|1991-06-13|Krupp Koppers Gmbh, 4300 Essen, De|
    US4481176A|1983-10-03|1984-11-06|Stauffer Chemical Company|Treatment for phosphorus-containing waste material|
    US4717558A|1986-10-29|1988-01-05|Occidental Chemical Corporation|Phosphorus recovery from phosphorus-containing pond sludge|
    DE4232997A1|1992-10-01|1994-04-07|Basf Ag|Process for reducing the phosphate content in waste water in the production of metal salts of ascorbic acid 2-monophosphate|
    CN100460339C|2005-05-17|2009-02-11|丹江口磷化工有限公司|Treatment process for industrial wastewater of yellow phosphorus production|
    US20080078720A1|2006-09-29|2008-04-03|The University Of Vermont And State Agricultural College|System and Method for Removing Phosphorus From Non-Point Pollution Sources|
    CN102079596B|2010-12-20|2012-07-04|湖北兴发化工集团股份有限公司|Method for removing elemental phosphorus in industrial wastewater|
    CN103908810B|2014-04-02|2015-11-04|绵阳启明星磷化工有限公司|A kind of yellow phosphorus sewage water treatment method and device thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19803038336|DE3038336A1|1980-10-10|1980-10-10|METHOD FOR PROCESSING WASTE WATER CONTAINING PHOSPHORUS|
    [返回顶部]