• 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 heterocyclic compounds, in particular, 3-isopropyl-2,1, 3-benzothiadiaEn-4-one-2, 2-dioxide
    公开号:SU1261565A3
    申请号:SU3500692
    申请日:1982-10-15
    公开日:1986-09-30
    发明作者:Ганзен Ганспетер；Меркле Ганс；Мюллер Альбрехт
    申请人:Басф, Аг (Фирма)；
    IPC主号:
    专利说明:

    sd
    ABOUT)
    权利要求:
    Claims (1)
    [1]
    The invention relates to a method for isolating benzothiadiazinone derivatives with herbicidal activity from wastewater produced during their production, in particular to a process for separating 3-isopropyl-2,1,3-benzothiadiazin-4-one 2, 2-dioxide (bentazon) from the obtained in its production of wastewater. The purpose of the invention is to increase the purity of the target product. Example 1, 12.2 waste containing,%: W-isopropyl-2,1,3-benzothiadiazin-4-one-2, 2-dioxide 0.20; anthranilova to elota 0,04; anthrano-anthranilic acid 0.005 2- (3,4-dihydro-4-oxo-3-quinazinyl-benzoic acid 0.008; (metsethyl) aminosulfonyl-amino- (benzoyl) amino | -benzoic acid 0.05; sodium 2,0; sodium chloride 1.0; dimethylamine 0.05; unidentified components 0.3; mixed with 0.062 part by volume (0.5% of the volume of waste water) of an aqueous solution containing 50 may.% Sodium salt of 3-isoproxy 1-2, 1 , 3-benzothiadiazin-4-one-2, 2-dioxide (hereinafter referred to as bentazon) and injected into the mixer with overflow, so that the residence time of wastewater in the mixer is 30 minutes is 99%. Perura 100 C. By continuously supplying 0.29 vol, h, 15% sulfuric acid, the pH of the medium in the mixer is maintained at 8.5. The treated waste water thus flows through the overflow and cooling pipe into the second tank, in which the temperature is 20 ° C. By further adding 0.95% by volume of 15% sulfuric acid, the pH value is reduced to 1.5, and thus 0.0246 wt. (87.7% in terms of content in wastewater) W-of.opropyl-2,1-3-benzothiadiazin-4-one-dioxide. The residence time of the wastewater in the second tank is also 30 minutes. The drain of the tank is fed directly to the inside. 5 After 48 hours there was no decrease in filtration performance. The resulting product has a purity of 89.6%. Examples 2-6, Repeat 1 was repeated with the difference indicated in tabica, Example 7 (comparative). Example 2 is repeated with the difference that a 30% by weight aqueous solution of bentazone sodium salt in an amount of 0.0122 vol, h, (0.1% of the volume of wastewater) is added to wastewater at a pH of 7.0. and exposure is carried out at 75 ° C for 10 minutes. At the same time, the degree of bentazone release from sewage is only 58.5%, and its purity is 55.9%. Example 5 is repeated with the difference that a 65% by weight aqueous solution of sodium salt of bentazon in the amount of 0.0732 rpm, (0.6% of the wastewater volume) is added to the wastewater at a pH of 10.0. and exposure is carried out at 110 ° C for 35 minutes. The degree of bentazone release from wastewater is reduced to 41.7%, and its purity to 82.5%. Claims 3-isopropyl-2, 1,3-benzothiadiazin-4-one-2,2-dioxide from wastewater production, including acid treatment, characterized in that, in order to increase the purity of the target product, 40-60% w / w aqueous solution of sodium salt of 3-isopropyl is added to wastewater at a pH of 7.5-9.5 -2,1,3-benzothiadiazin-4-one-2, 2-dioxide in the amount of 0.2-0.5% of the volume of wastewater, followed by aging at 80105 C for 15-30 minutes and treating the floor chennogo acid product.
    类似技术:
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    SU1261565A3|1986-09-30|Method of isolating 3-isopropyl-2,1,3-benzothiadiazine-4-on-dioxide
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    RU1836341C|1993-08-23|Method for purification of dioxydiphenylsulphone
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    SU983075A1|1982-12-23|Method of cleaning waste water from phenyl hydrasine
    SU1475571A1|1989-04-30|Method of producing feed additive from process water
    RU1436456C|1994-11-15|Process for producing potassium 2,5-dioxybenzene sulfonate
    SU810821A1|1981-03-07|Method of producing filler for leathers
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    同族专利:
    公开号 | 公开日
    US4451378A|1984-05-29|
    DE3141428A1|1983-04-28|
    BR8206023A|1983-09-13|
    DE3141428C2|1983-11-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4382865A|1978-09-14|1983-05-10|Envirogenics Systems Company|Treatment of reducible halohydrocarbon containing aqueous stream|
    US4284516A|1980-02-04|1981-08-18|The Goodyear Tire & Rubber Company|Process for the removal of low level halogenated contaminants|US4746443A|1986-12-18|1988-05-24|Basf Corporation|Bentazon containing wastewater treatment|
    US4824561A|1986-12-18|1989-04-25|Basf Corporation|Wastewater treatment|
    CN1165232C|1997-02-17|2004-09-08|住友化学工业株式会社|Herbicidal composition|
    CN102924405B|2012-11-21|2016-01-20|合肥星宇化学有限责任公司|A kind of preparation method of bentazone aqua|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3141428A|DE3141428C2|1981-10-19|1981-10-19|Process for the separation of 3-isopropyl-2,1,3-benzothiadiazin-4-one-2,2-dioxide|
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