• 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:
    A heat transfer liquid which comprises 2 to 12 parts by weight of water, at most 4 parts by weight of urea and/or formamide and/or dimethyl formamide, at most 7 parts by weight of ammonium nitrate and optionally ethylene glycol at most of the same volume than that of the above-listed components as major components with at most 0.3% by weight or by volume of corrosion inhibitors calculated for the total weight or volume of the liquid. Using the heat transfer liquid of the invention the drawbacks derived from the application of glycol can be completely or in most part eliminated and a non-toxic heat-transfer liquid suitable for isopiestic drying can be also prepared.
    公开号:SU1639433A3
    申请号:SU864027114
    申请日:1986-03-14
    公开日:1991-03-30
    发明作者:Кардош Петер；Кальман Тибор；Керти Йожеф；Варнаи Иштван
    申请人:Комароми Кеолайипари Валлалат (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to the production of heat transfer fluids and can be used in cooling systems, for example, in internal combustion engines, thermal installations, industrial and household refrigeration and freezing machines, open and closed thermal solar collectors, copiers and for isopiesing drying.
    The aim of the invention is to reduce toxicity without deteriorating the performance of the coolant.
    Example 1. A mixture of heat transfer media suitable for isopiestic drying.
    Mix 2 weight.h. water, 4 weight.h. urea and 7 wt. am ammonium nitrate. The dissolution is accompanied by a strong endothermic effect; therefore, the process is carried out in a heated duplicator (copier) equipped with a stirrer. The pH of the mixture is adjusted to 7.2 by adding potassium carbonate, after which 0.039-0.057 parts by weight are introduced. corrosion inhibitor - dipotassium phosphate and hexamethylene tetramine per 1 m3 of mixture.
    The properties of the thick viscous liquid thus obtained are as follows:
    ABOUT CO 4b
    with oe

    O4
    the freezing point is 7.5 ° C; boiling point 123 ° C; density is 1348 kg / m3.
    The liquid can be used for zopiestic sugaki, as it has a high boiling point.
    In addition, it can be used as an antifreeze if you add water, as its temperature quickly decreases with the addition of water. JQ Mixture can be directly prepared on site from urea and ammonium nitrate products, and distillation operations are excluded. Non-freezing solutions can be prepared by addition of water and possibly glycol to this mixture. Conveying a concentrate is more economical than transporting non-freezing liquids containing 20 more water.
    Example 2. Non-freezing glycol-free liquid.
    A solution containing 8 weight.h. water, /, weight.h about urea and 7 weight.h. Ammonium nitrate 25 5 is obtained in two ways: by directly mixing the individual components and by diluting the solution obtained in Example 1 with water. The additives listed 30 in Example 1 are also mixed with the solution.
    The mixture thus obtained has the following properties: a freezing point of -28 ° C; Ave of affairs of 35 heaps of -28.8 ° C; bp 110.5 ° C; density is 1234 kg / m3; specific heat 0.81 cal / C cm3 (between 20 and 25 ° C).
    The specific heat capacity of the heat carrier is 40 liters of the prototype based on a mixture of glycol and water (1: 1) equal to the specific heat of the liquid obtained according to the example. The mixture obtained in the example does not contain glycol, but its yield strength 45 reaches almost.
    The volume of fluid according to the example does not increase during freezing and, although the deposited crystals do not completely fill the spaces, they do not lead to damage to the metal wall of the instruments. The liquid is non-toxic if it comes into contact with the skin or into the mouth, and can be used as a valuable fertilizer, it can be mixed with phosphate and potassium compounds and can be converted into
    combined fertilizer when removing from the machine. Given that it is usually not necessary to cool down to approximately -30 ° C and below, freezing the mixture (if it does not damage the instrument) is not a drawback, while melting the mixture is endothermic and cools the system. In these cases, the transportation of heat means the disposal of latent heat, since at an ambient temperature below -30 ° C, heat from the machine to be cooled, operating at a temperature above -30 ° C, is lost.
    The advantage of the heat transfer fluid is that the disadvantages arising from the use of glycol can be completely or largely eliminated, while the freezing temperature and the yield strength of the solution can be significantly reduced, thus the liquid can be used in a wider temperature range.
    In addition, the non-toxic heat transfer fluid is suitable for isopiestic drying, which saves not only a large amount of energy, but also prevents heating of heat-sensitive substances.
    权利要求:
    Claims (3)
    [1]
    1. Liquid heat carrier based on an aqueous solution of an organic compound, characterized in that, in order to reduce toxicity without deteriorating the performance of the heat transfer fluid, it contains urea as an organic compound and additionally ammonium nitrate and a corrosion inhibitor in the following ratio of components, parts by weight:
    Water2-8
    Urea4
    Ammonium nitrate 7
    Corrosion Inhibitor 0, 039-0,057
    [2]
    2. Liquid heat carrier according to claim 1, characterized in that
    as a corrosion inhibitor, it contains dalkali phosphate and hexamethylene tetramine.
    [3]
    3. Liquid heat carrier according to claim 1, characterized in that it has a pH of 7.2.
    类似技术:
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    同族专利:
    公开号 | 公开日
    DE3590348T1|1986-06-26|
    WO1986000917A1|1986-02-13|
    US4689165A|1987-08-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2539132C1|2013-08-19|2015-01-10|Федеральное государственное бюджетное учреждение науки Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук |Inhibitor of sulphide corrosion and hydrogenation of metal hardware|CH139584A|1928-09-18|1930-04-30|Stratmann & Werner|Cooling brine.|
    US2308246A|1939-06-01|1943-01-12|H S Polin Lab Inc|Antifreezing medium|
    US2549430A|1944-12-16|1951-04-17|Allied Chem & Dye Corp|Process of reducing corrosion and composition of reduced corrosiveness|
    AT204530B|1952-08-06|1959-07-25|Anton Papp|Heat transfer medium|
    US3630913A|1969-05-15|1971-12-28|Allied Chem|Deicer composition|
    GB1387810A|1971-05-27|1975-03-19|Chubb Fire Security Ltd|Freezing point depressant|
    DE2733313A1|1977-07-23|1979-02-08|Akzo Gmbh|REFRIGERATOR MIXTURE FOR LOW-TEMPERATURE FREEZING|
    JPS585219B2|1979-06-04|1983-01-29|Mitsui Toatsu Chemicals|
    DE3200349A1|1982-01-08|1983-07-21|Hoechst Ag, 6230 Frankfurt|Nitrite-free functional fluids based on glycols|US5061797A|1988-03-29|1991-10-29|Buckman Laboratories International, Inc.|1-methyl-3,5,7-triaza-1-azoniatricyclodecane compounds|
    US4922973A|1988-11-17|1990-05-08|Coil Matic, Inc.|Collecting vessels for collecting refrigerants from heat exchange systems and methods|
    SE511264C2|1998-01-22|1999-09-06|Aspen Petroleum Ab|Freeze-resistant heat / coolant containing a corrosion inhibitor|
    HU0000154D0|2000-01-18|2000-03-28|Process for producing environment-frienoly supperyless liquid|
    DE10036031A1|2000-07-24|2002-02-07|Basf Ag|Anti-freeze concentrates based on amides and these comprehensive coolant compositions for the protection of magnesium and magnesium alloys|
    WO2005006476A1|2003-07-11|2005-01-20|Shishiai-Kabushikigaisha|Cooling fluid composition for fuel battery|
    EP1816177A4|2004-10-25|2010-10-06|Shishiai Kk|Anti-freeze solution/coolant composition|
    JP6570217B2|2014-03-31|2019-09-04|日産自動車株式会社|Coolant|
    CN105255455B|2015-10-16|2018-03-13|东营市昊铭润滑科技有限公司|A kind of automobile antifreezing solution additive of high rust inhibition and preparation method thereof|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    HU278784|1984-07-18|
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