• 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:SU931105A3
    申请号:SU802937821
    申请日:1980-06-25
    公开日:1982-05-23
    发明作者:Вегляйтнер Карлхайнц；Крулла Вильфрид；Виллим Рихард
    申请人:Хеми Линц Аг (Фирма)；
    IPC主号:
    专利说明:

    (3) METHOD FOR OBTAINING CYANURIC ACID
    one
    The invention relates to the improvement of the method of obtaining cyanuric acid - the original product in the synthesis of disinfectants and additives to polymers.
    A known method for producing cyanuric acid from crude melamine containing ammeline and ammelide, including the preparation of salts by dilute acid and the subsequent hydrolysis with acid, in particular sulfuric acid.
    The yield of {"ianuric acid, containing 0.85% ammelide and 0.05 melamine salt, is 80%.
    The disadvantages of the method are the two-stage process and the insufficiently high yield of the target product.
    The closest to the proposed effect achieved is a method for producing cyanuric acid from melamine and ammeline or ammelide, which includes hydrolysis dilution.
    sulfuric acid, for example, 10-20% taken in an amount exceeding the stoichiometric ratio with respect to the amino groups by 5% 5 at 180-200 C. The target product contains up to 13% of impurities 2 ..
    The disadvantage of this method is the low purity of the target product.
    The purpose of the invention is to increase the purity of the target product.
    The goal is achieved by the method of obtaining cyanuric acid by hydrolysis of crude or waste melamine with 70-80% 18 sulfuric acid, taken in an amount equivalent to the formation of bis "1" hydrogen sulfate, followed by distillation of water introduced with sulfuric acid, at 130- 190 ° C. 20 Preferably, 7075% sulfuric acid is used, and the process is carried out at 1 O-1 0 ° C. .
    Getting the target product by the proposed method allows
    权利要求:
    Claims (3)
    [1]
    Claim
    1. The method of producing cyanuric acid by hydrolysis of crude or waste melakin with sulfuric acid at an elevated temperature, followed by isolation of the target 35 product, characterized in that in order to improve the quality of the target product, 7080% sulfuric acid is used in amounts equivalent to the formation of ammonium bisulfate, and the process is carried out at 150-190 ° C with the distillation of water introduced with sulfuric acid.
    [2]
    2. The method according to claim 1, about t l and the fact that they use 45 70-75% sulfuric acid.
    [3]
    3- The method according to PP. 1 and 2; that the process is carried out at 160-190 ° C.
    类似技术:
    公开号 | 公开日 | 专利标题
    FR2442227A1|1980-06-20|PROCESS FOR THE PRODUCTION OF THREO-3-AMINO-2-HYDROXYBUTANOYLAMINOACETIC ACIDS
    SU931105A3|1982-05-23|Process for producing cyanuric acid
    DE1938513B1|1970-12-23|Process for the preparation of D-threo-1-p-methylsulfonyl-phenyl-2-dichloroacetamido-propane-1,3-diol
    SU452962A3|1974-12-05|Method for preparing phthalimido-1,3,5triazines
    US2327119A|1943-08-17|Process of making amino acids
    US4370280A|1983-01-25|Phosphonohydroxyacetonitrile, a process for its preparation and its use as an intermediate product for the preparation of medicaments
    US4230869A|1980-10-28|Process for preparing 5-|hydantoin
    KR100260977B1|2000-07-01|Process for the production of guanidine derivatives
    DE1795151A1|1972-03-23|Antibacterial substances and processes for their manufacture
    US4175206A|1979-11-20|Process for preparing a hydroxyphenylglycine compound
    US4346233A|1982-08-24|Process for the preparation of ureas
    DE1720024B2|1979-04-19|Process for the preparation of 3-amino-4-carboxamidopyrazole
    US3952011A|1976-04-20|Process for producing hemi-alkali metal salt of 2-pyrrolidone-5-carboxylic acid
    US3122583A|1964-02-25|Preparation of diaminopimelic acid
    US4275216A|1981-06-23|Process for preparing 4|-hydroxymethyl 5|-lower alkyl imidazoles
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    US4059548A|1977-11-22|Hexahydropyrimidine-1,3-diacetonitriles and processes for preparing the same
    US4166909A|1979-09-04|Process for preparation of a substituted triazine
    US3882107A|1975-05-06|Zinc chelate of 2,4-dihydroxy-1,4|-benzoxazine-3-one
    US4559409A|1985-12-17|Process for manufacturing guanylurea sulfamate
    KR930002277B1|1993-03-27|5-| hydantion
    DE2065698B2|1979-01-04|Process for the preparation of 2-isopropyl-6-methyl-4 | -pyrimidone
    US4058528A|1977-11-15|5-Hydroxyhexahydropyrimidine
    JP3027227B2|2000-03-27|Method for producing dimethylol hydantoin compound
    同族专利:
    公开号 | 公开日
    EP0023556A1|1981-02-11|
    ES8105304A1|1981-05-16|
    DE2929211A1|1981-02-05|
    PL225472A1|1981-03-27|
    EP0023556B1|1982-12-22|
    US4278794A|1981-07-14|
    AT2073T|1983-01-15|
    JPS5616479A|1981-02-17|
    ES493534A0|1981-05-16|
    DE3061419D1|1983-01-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE1067027B|1959-10-01|American Cyanamid Company New York, N Y |Process for the production of cyanuric acid|
    US2943088A|1959-06-22|1960-06-28|Westfall Richard Howard|Production of cyanuric acid from urea|
    US3325493A|1963-08-13|1967-06-13|Showa Denko Kk|Process for producing cyanuric acid from melamine purification waste mother liquor|
    BE704239A|1967-09-25|1968-02-01|
    US3563987A|1969-04-01|1971-02-16|Fmc Corp|Preparation of cyanuric acid|
    US3761474A|1971-03-22|1973-09-25|Fmc Corp|Purification of crude cyanuric acid|
    US3886153A|1974-01-09|1975-05-27|Fmc Corp|Purification of cyanuric acid|
    US4031091A|1974-03-04|1977-06-21|Fmc Corporation|Process for purifying crude cyanuric acid|
    US4029660A|1974-10-02|1977-06-14|Fmc Corporation|Crude cyanuric acid purification|
    US3996225A|1975-12-09|1976-12-07|Fmc Corporation|Manufacture of cyanuric acid|DE3316963A1|1983-05-09|1984-11-15|Lentia GmbH Chem. u. pharm. Erzeugnisse - Industriebedarf, 8000 München|METHOD FOR PRODUCING PURE CYANURIC ACID|
    AT377983B|1983-05-16|1985-05-28|Chemie Linz Ag|METHOD FOR PRODUCING PURE CYANURIC ACID|
    US4663387A|1985-04-02|1987-05-05|Kuwait Institute For Scientific Research|Utilization of melamine waste effluent|
    JPH0753499B2|1988-05-12|1995-06-07|三菱電機株式会社|Failure detection device for airbag device|
    AT463564T|2004-08-10|2010-04-15|Ajinomoto Kk|USE OF PHOSPHOCOLOLASE FOR THE PRODUCTION OF APPROPRIATE METABOLITES|
    US7998311B2|2008-07-24|2011-08-16|Hercules Incorporated|Enhanced surface sizing of paper|
    CN102321037A|2011-06-02|2012-01-18|郑州大学|Melamine ornithine aminotransferasewaste residue resource utilization method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19792929211|DE2929211A1|1979-07-19|1979-07-19|METHOD FOR PRODUCING PURE CYANURIC ACID|
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