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HYDRATE OF RARE EARTH METAL SULFATE, METHOD FOR PRODUCING SAME, AND CHEMICAL THERMAL STORAGE MATERIAL

Foreign code F180009635
File No. 5274
Posted date Nov 20, 2018
Country WIPO
International application number 2016JP086634
International publication number WO 2017099197
Date of international filing Dec 8, 2016
Date of international publication Jun 15, 2017
Priority data
  • P2015-241182 (Dec 10, 2015) JP
Title HYDRATE OF RARE EARTH METAL SULFATE, METHOD FOR PRODUCING SAME, AND CHEMICAL THERMAL STORAGE MATERIAL
Abstract The problem of the invention is to provide a compound useful as a chemical thermal storage material that is inexpensive, highly safe, has high reproducibility even when reacted repeatedly (high repetition durability), and also makes it possible to proceed reversibly with heat storage and heat release even in a relatively low temperature range. The invention is a hydrate of a rare earth metal sulfate having a characteristic peak at a specific diffraction angle (2θ) in an x-ray diffraction pattern measured using λ=1.5418Å copper radiation through a monochromator.
Outline of related art and contending technology BACKGROUND ART
Current, such as Japanese plants 100-250 degrees in the exhaust heat of the large amount of wasted. Such exhaust heat accumulation, effective utilization of energy can be activated and, as a result, the use of fossil fuels is believed to reduce the amount of.
Above point of view, the prior art, with the heat storage techniques have been developed. For example, organic latent-heat storage using latent heat of fusion of the heat storage material but the technique has been developed, and high cost due to the heat storage density is low (for example, non-patent document 1) are.
Disclosed in Patent Document @num@ is an image processing apparatus, for detecting a difference between two images of the @num@ when, one of @num@ and adjust the displacement of the image. For example, about 100°C or more in a temperature range of the heat storage and heat can be supplied as a reaction system, as shown in the following Table 1 solid/gas reaction system has been studied. In addition, the table 1, in terms of safety and versatility of the benefits, a system for using the vapor as the gas components are enumerated.
TABLE 1
1-3 is a reaction system of Table 1, the equilibrium temperature is promising but relatively at a low point, the hydration reaction is a reverse reaction is almost does not progress, the heat supply cannot be performed. Therefore, this is an industrially effective reaction system and it is not considered. In addition, 3 used in the reaction system CuO is expensive, high from the viewpoint of cost problem.
In addition, the reaction system is 4-6, the reaction proceeds reversibly. Further, the reaction system is 4-6, low cost, safety, non-corrosive and relatively promising from the viewpoint of certain. However, as is clear from table 1, the heat storage operation (dehydration reaction) the reaction system temperature is 4-6 higher than 250°C, the reaction system is 4, also in the durability in a case where repeated use of the problem.
In this way, the chemical heat storage material used has not yet been in practical use yet embodiment of the present invention (the reaction system 4 of the MgO/H2 Ofor non-patent document 2, the reaction system 5 of LaOOH/H2 ONon-patent Document 3 for reference).
Scope of claims (In Japanese)請求の範囲 [請求項1]
モノクロメーターを通したλ=1.5418Åの銅放射線を用いて測定されたX線回折パターンにおいて、下記に示す回折角(2θ)に特徴的なピークを有する希土類金属硫酸塩の水和物。
  回折角(2θ)
   13.0~14.0°
   16.5~17.5°
   19.5~20.5°
   24.5~25.5°
   29.0~30.0°

[請求項2]
前記希土類金属が、ランタン、セリウム、プラセオジウム、ネオジム、及びイットリウムよりなる群から選ばれる少なくとも1種である、請求項1に記載の希土類金属硫酸塩の水和物。

[請求項3]
一般式(1):
   M 2(SO 43・nH 2O  (1)
(式(1)中、Mは、La、Ce、Pr、Nd及びYよりなる群から選ばれる少なくとも1種の希土類金属であり、nは0より大きく、9以下の数である)
で表される、請求項1又は2に記載の希土類金属硫酸塩の水和物。

[請求項4]
希土類金属硫酸塩1水和物である、請求項1~3のいずれか一項に記載の希土類金属硫酸塩の水和物。

[請求項5]
一般式(2):
   M 2(SO 43・1H 2O  (2)
(式(2)中、Mは、La、Ce、Pr、Nd及びYよりなる群から選ばれる少なくとも1種の希土類金属である)
によって表される希土類金属硫酸塩の水和物。

[請求項6]
請求項1~5のいずれか一項に記載の希土類金属硫酸塩の水和物を含み、さらに、モノクロメーターを通したλ=1.5418Åの銅放射線を用いて測定されたX線回折パターンにおいて、下記に示す回折角(2θ)に特徴的なピークを有する希土類金属硫酸塩を含む化学蓄熱材料。
  回折角(2θ)
   13.0~14.0°
   16.5~17.5°
   19.5~20.5°
   24.5~25.5°
   29.0~30.0°

[請求項7]
モノクロメーターを通したλ=1.5418Åの銅放射線を用いて測定されたX線回折パターンにおいて、下記に示す回折角(2θ)に特徴的なピークを有する希土類金属硫酸塩の水和物の製造方法であって、
(1)希土類金属硫酸塩、又は前記ピークを有しない希土類金属硫酸塩の水和物を200℃以上に加熱する工程、及び
(2)工程(1)で得られた希土類金属硫酸塩を水蒸気の存在下で、降温させる工程
を含む製造方法。
  回折角(2θ)
   13.0~14.0°
   16.5~17.5°
   19.5~20.5°
   24.5~25.5°
   29.0~30.0°

[請求項8]
(1)希土類金属硫酸塩、又は希土類金属硫酸塩の水和物であって、モノクロメーターを通したλ=1.5418Åの銅放射線を用いて測定されたX線回折パターンにおいて、請求項7に示す回折角(2θ)に特徴的なピークを有しないものを200℃以上に加熱する工程、及び
(2)工程(1)で得られた希土類金属硫酸塩を水蒸気の存在下で、降温させる工程
を含む、希土類金属硫酸塩1水和物の製造方法。

[請求項9]
前記希土類金属が、ランタン、セリウム、プラセオジウム、ネオジム、及びイットリウムよりなる群から選ばれる少なくとも1種である、請求項7又は8に記載の製造方法。

  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • KYOTO UNIVERSITY
  • Inventor
  • HATADA, Naoyuki
  • UDA, Tetsuya
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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