JPH02147689A - Absorbing solution for absorption refrigerator - Google Patents
Absorbing solution for absorption refrigeratorInfo
- Publication number
- JPH02147689A JPH02147689A JP63301304A JP30130488A JPH02147689A JP H02147689 A JPH02147689 A JP H02147689A JP 63301304 A JP63301304 A JP 63301304A JP 30130488 A JP30130488 A JP 30130488A JP H02147689 A JPH02147689 A JP H02147689A
- Authority
- JP
- Japan
- Prior art keywords
- absorption
- lithium
- absorption liquid
- aqueous solution
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 53
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 claims abstract description 35
- -1 lithium halide Chemical class 0.000 claims abstract description 21
- 239000007864 aqueous solution Substances 0.000 claims abstract description 18
- 239000000654 additive Substances 0.000 claims abstract description 11
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 10
- 230000000996 additive effect Effects 0.000 claims abstract description 9
- 150000001869 cobalt compounds Chemical class 0.000 claims abstract description 9
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 8
- 229910001386 lithium phosphate Inorganic materials 0.000 claims abstract description 7
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 claims abstract description 7
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims abstract description 6
- MEFBJEMVZONFCJ-UHFFFAOYSA-N molybdate Chemical compound [O-][Mo]([O-])(=O)=O MEFBJEMVZONFCJ-UHFFFAOYSA-N 0.000 claims abstract description 6
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 6
- 239000010452 phosphate Substances 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 30
- GVPFVAHMJGGAJG-UHFFFAOYSA-L cobalt dichloride Chemical compound [Cl-].[Cl-].[Co+2] GVPFVAHMJGGAJG-UHFFFAOYSA-L 0.000 claims description 8
- NMHMDUCCVHOJQI-UHFFFAOYSA-N lithium molybdate Chemical group [Li+].[Li+].[O-][Mo]([O-])(=O)=O NMHMDUCCVHOJQI-UHFFFAOYSA-N 0.000 claims description 8
- 235000021317 phosphate Nutrition 0.000 claims description 7
- PSHMSSXLYVAENJ-UHFFFAOYSA-N dilithium;[oxido(oxoboranyloxy)boranyl]oxy-oxoboranyloxyborinate Chemical group [Li+].[Li+].O=BOB([O-])OB([O-])OB=O PSHMSSXLYVAENJ-UHFFFAOYSA-N 0.000 claims description 6
- 150000002823 nitrates Chemical class 0.000 claims description 3
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 abstract description 14
- 239000007769 metal material Substances 0.000 abstract description 5
- 239000000243 solution Substances 0.000 abstract description 5
- 229910021580 Cobalt(II) chloride Inorganic materials 0.000 abstract 1
- 229910011131 Li2B4O7 Inorganic materials 0.000 abstract 1
- 229910010171 Li2MoO4 Inorganic materials 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 18
- 238000005260 corrosion Methods 0.000 description 18
- 230000000052 comparative effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000003112 inhibitor Substances 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 150000003851 azoles Chemical class 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- JQVALDCWTQRVQE-UHFFFAOYSA-N dilithium;dioxido(dioxo)chromium Chemical compound [Li+].[Li+].[O-][Cr]([O-])(=O)=O JQVALDCWTQRVQE-UHFFFAOYSA-N 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 description 1
- 229910001947 lithium oxide Inorganic materials 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 150000002826 nitrites Chemical class 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical compound [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/18—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using inorganic inhibitors
- C23F11/187—Mixtures of inorganic inhibitors
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、腐蝕性の大きいハロゲン化リチウムを含む
水溶液を吸収液とする吸収冷凍機において、吸収液に腐
蝕抑制性能の大きい添加剤を含有させて、吸収冷凍機の
金属材料の腐蝕を抑制する吸収冷凍機用吸収液に関する
。[Detailed Description of the Invention] [Industrial Application Field] This invention provides an absorption refrigerator that uses an aqueous solution containing highly corrosive lithium halide as an absorption liquid, in which the absorption liquid contains an additive having a high corrosion suppressing performance. The present invention relates to an absorption liquid for absorption refrigerators that suppresses corrosion of metal materials of absorption refrigerators.
従来、吸収冷凍機では、吸収液として一般にハロゲン化
リチウムの水溶液、特に臭化リチウム水溶液が使用され
ている。しかし、臭化リチウム水溶液は軟鋼、銅、黄銅
等に対する腐蝕性を有することが良く知られている。こ
れらの金属を吸収冷凍機の材料として使用するには、吸
収液として臭化リチウム水溶液が使用される場合、腐蝕
防止の為にインヒビターの添加が不可欠である。従来、
多く使用されるインヒビターには、例えば、クロム酸塩
、モリブデン酸塩、タングステン酸塩、硝酸塩、亜硝酸
塩、アゾール類、アミン類等がある。Conventionally, in absorption refrigerators, an aqueous solution of lithium halide, particularly an aqueous solution of lithium bromide, has been used as an absorption liquid. However, it is well known that lithium bromide aqueous solutions are corrosive to mild steel, copper, brass, and the like. In order to use these metals as materials for absorption refrigerators, when an aqueous lithium bromide solution is used as the absorption liquid, it is essential to add an inhibitor to prevent corrosion. Conventionally,
Commonly used inhibitors include, for example, chromates, molybdates, tungstates, nitrates, nitrites, azoles, amines, and the like.
これらの大部分は酸化剤であり、鉄表面に緻密な保護被
膜を形成することによって腐蝕を抑制するものである。Most of these are oxidizing agents that suppress corrosion by forming a dense protective film on the iron surface.
前記のような被膜形成の間の反応における水素ガスの発
生を免かれることは困難であり、この水素ガスにより冷
凍機内の圧力上昇を招き、運転に支障を来たすことがし
ばしばあるという問題点がある。それに加えて、近年、
吸収冷凍機の高効率化や空冷化が要望され、吸収液の高
濃度化、冷凍機内の高温化が行なわれるようになった。It is difficult to avoid the generation of hydrogen gas in the reaction during film formation as described above, and there is a problem in that this hydrogen gas causes a pressure increase inside the refrigerator, often causing trouble in operation. . In addition, in recent years,
Demand for higher efficiency and air cooling of absorption refrigerators has led to higher concentrations of absorption liquid and higher temperatures inside the refrigerator.
これに伴なって、高温での分解が問題とされる有機系イ
ンヒビターや硝酸、亜硝酸系インヒビターを使用するこ
とが困難となる問題点がある。また、一般にハロゲン化
リチウム水溶液は、高温、高濃度になる程、腐蝕性が強
くなるので、前記インヒビターでは十分に腐蝕を抑制す
ることが困難であるという問題点がある。Along with this, there is a problem that it becomes difficult to use organic inhibitors and nitric acid and nitrite-based inhibitors, which are problematic in their decomposition at high temperatures. In addition, in general, lithium halide aqueous solutions become more corrosive as the temperature and concentration become higher, so there is a problem in that it is difficult to sufficiently suppress corrosion with the above-mentioned inhibitors.
この発明は、ハロゲン化リチウムを含む水溶液を吸収液
とする吸収冷凍機用吸収液において、吸収冷凍機に使用
する金属材料の腐蝕を抑制する吸収液を提供することを
目的としている。An object of the present invention is to provide an absorption liquid for an absorption refrigerator that uses an aqueous solution containing lithium halide as an absorption liquid, and which suppresses corrosion of metal materials used in the absorption refrigerator.
この発明の吸収冷凍機用吸収液は、ハロゲン化リチウム
を含む水溶液に＜ａ＞水酸化アルカリ金属化合物、（ｂ
）コバルト化合物を含有させたもので、金属材料に対す
る腐蝕を抑制する吸収冷凍機用吸収液である。The absorption liquid for an absorption refrigerator of the present invention includes an aqueous solution containing lithium halide, <a> an alkali metal hydroxide compound, (b
) This is an absorption liquid for absorption refrigerators that contains a cobalt compound and suppresses corrosion of metal materials.
さらに、腐蝕抑制性を増加する為に（ｃ）添加剤として
、（イ）燐酸塩、（ロ）硝酸塩、（ハ）モリブデン酸塩
の中の少くとも一以上から成る添加物を含有させた吸収
冷凍機用吸収液である。Furthermore, in order to increase the corrosion inhibiting properties, (c) an additive consisting of at least one of (a) phosphates, (b) nitrates, and (c) molybdates is added. This is an absorption liquid for refrigerators.
特に、前記（ａ）水酸化アルカリ金属化合物が水酸化リ
チウムであり、（ｂ）コバルト化合物が塩化コバルトで
ある冷凍機用吸収液である。In particular, the absorption liquid for a refrigerator is such that (a) the alkali metal hydroxide compound is lithium hydroxide, and (b) the cobalt compound is cobalt chloride.
そして、前記（ａ）水酸化アルカリ金属化合物の濃度が
、０．０５〜０．５重量％であり、（ｂ）コバルト化合
物の濃度が、０．００５〜０．１重量％であることが好
ましい。Preferably, the concentration of the alkali metal hydroxide compound (a) is 0.05 to 0.5% by weight, and the concentration of the cobalt compound (b) is 0.005 to 0.1% by weight. .
また、前記（ｃ）添加剤の（イ）燐酸塩が燐酸リチウム
であり、（ロ）硼酸塩が四硼酸リチウムであり、（ハ）
モリブデン酸塩がモリブデン酸リチウムである冷凍機用
吸収液である。In addition, (a) the phosphate of the additive (c) is lithium phosphate, (b) the borate is lithium tetraborate, and (c)
This is an absorption liquid for refrigerators in which the molybdate is lithium molybdate.
さらに、（イ）燐酸塩、（ロ）硼酸塩、（ハ）モリブデ
ン酸塩の各々の濃度が０．００５〜０．１重量％である
ことが好ましい。Furthermore, it is preferable that the concentration of each of (a) phosphate, (b) borate, and (c) molybdate is 0.005 to 0.1% by weight.
即ち、水酸化リチウムについては、０．０５重量％、酸
化コバルトについては、０．００５重量％が少くとも必
要であり、逆に濃度が高すぎると、アルカリ腐蝕が生じ
ることや、溶解しきれずに沈澱するといった問題が生じ
るので、水酸化リチウムについては０．５重量％、塩化
コバルトについては０．１重量％を越えないことが好ま
しい。また、燐酸リチウム、四硼酸リチウム、モリブデ
ン酸リチウムは、０．０５重量％以上添加しないとその
効果が生じないで、０．１重量％を越えた添加量では溶
けきれず沈澱する可能性があるので、０．００５〜０．
１重量％が好ましい。That is, at least 0.05% by weight of lithium hydroxide and 0.005% by weight of cobalt oxide are required; on the other hand, if the concentration is too high, alkali corrosion may occur or it may not be completely dissolved. Since problems such as precipitation may occur, it is preferable that the amount does not exceed 0.5% by weight for lithium hydroxide and 0.1% by weight for cobalt chloride. In addition, lithium phosphate, lithium tetraborate, and lithium molybdate do not have their effects unless added in an amount of 0.05% by weight or more, and if added in an amount exceeding 0.1% by weight, they may not be completely dissolved and may precipitate. Therefore, 0.005 to 0.
1% by weight is preferred.
ハロゲン化リチウムを含む水溶液に水酸化リチウムを添
加するにより、溶液の水素イオン濃度は下がり、腐蝕性
は弱まる。また塩化コバルトを添加することにより、腐
蝕環境にさらされている金属のアノード反応を抑制し溶
液中への金属の溶出を防止することができる。即ち、金
属の腐蝕反応そのものを抑制するので、腐蝕に伴う水素
ガスの発生をも抑制することができ、冷凍機内の圧力上
昇を防止することができる。By adding lithium hydroxide to an aqueous solution containing lithium halide, the hydrogen ion concentration of the solution decreases and its corrosivity becomes weaker. Furthermore, by adding cobalt chloride, it is possible to suppress the anodic reaction of metal exposed to a corrosive environment and prevent the metal from leaching into the solution. That is, since the corrosion reaction of the metal itself is suppressed, the generation of hydrogen gas accompanying corrosion can also be suppressed, and an increase in pressure within the refrigerator can be prevented.
さらに、燐酸リチウム、四硼酸リチウム、モリブデン酸
リチウムは塩化コバルトのアノード反応抑制効果を増強
し、より強力な腐蝕抑制効果をもたらすものである。Furthermore, lithium phosphate, lithium tetraborate, and lithium molybdate enhance the anode reaction suppression effect of cobalt chloride, resulting in a stronger corrosion suppression effect.
臭化リチウム水溶液を６０重量％含有する水溶液を調製
し、この水溶液に第１表に示すように水酸化リチウム、
塩化コバルト及び添加剤（燐酸リチウム、四硼酸リチウ
ム、モリブデン酸リチウム）を加えて実施例１〜７の試
料吸収液を調製した。An aqueous solution containing 60% by weight of lithium bromide aqueous solution was prepared, and lithium hydroxide, as shown in Table 1, was added to this aqueous solution.
Sample absorption liquids of Examples 1 to 7 were prepared by adding cobalt chloride and additives (lithium phosphate, lithium tetraborate, lithium molybdate).
また被検腐蝕材料として重量６５．５ ｇ、大きさ１］
、、Ｏｃ＋ｎ（縦）Ｘ４．Ｏｃｍ（横）Ｘｏ、２ｃｍ（
厚み）の炭素ｆ；Ｒ（ｓｐｃｃ）を作製した。これに吊
下げ用の孔を形成し試験片表面をエメリー紙で研磨し。In addition, the corrosion material to be tested was 65.5 g in weight and 1 in size.]
,,Oc+n (vertical)X4. Ocm (horizontal) Xo, 2cm (
Carbon f;R (spcc) with thickness) was prepared. A hole for hanging was formed in this and the surface of the specimen was polished with emery paper.
脱脂処理を行った。その後、第１表の実施例］、〜７に
示すインヒビターを含んだ各吸収液中に試験片を５枚ず
つ隔離して吊下げて浸漬した。次に容器内を真空にし、
温度１６０℃で５００時間加熱処理を行い、冷却後、容
器内を再び真空引きし。Degreasing treatment was performed. Thereafter, five test pieces were isolated and hung in each absorption liquid containing the inhibitors shown in Examples 1 to 7 and immersed in them. Next, vacuum the inside of the container,
Heat treatment was performed at a temperature of 160°C for 500 hours, and after cooling, the inside of the container was evacuated again.
腐蝕反応により生成されるガス発生量を測定し、試験片
を取り出して腐蝕減量を測定した。その結果を表−１−
（実施例）に示す。また比較の為に同様に試験した、比
較例１．添加剤無し、比較例２゜水酸化リチウムとクロ
ム酸リチウム、比較例３、水酸化リチウムとモリブデン
酸リチウム、比較例４、水酸化リチウムと硝酸リチウム
の結果を表−２（比較例）に示す。本発明の第１表と比
較例の第２表から添加剤として水酸化リチウムと塩化コ
バル１〜を臭化リチウム水溶液に添加した吸収冷凍機用
吸収液は、炭素鋼の腐蝕量と発生ガス量を顕著に小さく
し得ることが明らかである。また、水酸化リチウムと塩
化コバルトを含有する臭化リチウム水溶液へｍ酸リチウ
ム、Ｉ；！ｒｌ硼酸リチウム、モリブデン酸すチウ１５
を添加した吸収冷凍機用吸収液は、さらに炭素鋼の腐蝕
量と発生ガス量を減少することが明らかである。The amount of gas generated by the corrosion reaction was measured, and the test piece was taken out and the weight loss due to corrosion was measured. The results are shown in Table-1-
(Example). Comparative Example 1 was also tested in the same manner for comparison. No additive, Comparative Example 2゜Lithium hydroxide and lithium chromate, Comparative Example 3, Lithium hydroxide and lithium molybdate, Comparative Example 4, Lithium hydroxide and lithium nitrate The results are shown in Table 2 (Comparative Example) . From Table 1 of the present invention and Table 2 of Comparative Examples, the absorption liquid for absorption refrigerators in which lithium hydroxide and cobal chloride 1 or more are added to the lithium bromide aqueous solution as additives shows the amount of corrosion of carbon steel and the amount of gas generated. It is clear that it is possible to significantly reduce the In addition, to a lithium bromide aqueous solution containing lithium hydroxide and cobalt chloride, lithium oxide, I;! rl lithium borate, lithium molybdate 15
It is clear that the absorption liquid for absorption refrigerators to which .
表−１（実施例）
表−２（比較例）
〔発明の効果〕
本発明は１以上説明したように以下に記載されるような
効果を奏する。Table 1 (Example) Table 2 (Comparative Example) [Effects of the Invention] As explained above, the present invention produces the following effects.
本発明の吸収冷凍機用吸収液は、ハロゲン化リチウムを
′Ｓむ水溶液に水酸化アルカリ金属化合物、特に水酸化
リチウム、及びコバルト化合物、特に塩化コバルトを添
加させた吸収液であるので金属材料に対して腐蝕抑制効
果を有し５発生ガス量を抑える為、吸収冷凍機の構成材
料の寿命を延ばし機内の圧力上昇を防止し能力を長期に
わたって維持できる吸収液を提供することができる。さ
らに前記吸収液に燐酸塩、特に燐酸リチウム、硼酸塩。The absorption liquid for an absorption refrigerator of the present invention is an absorption liquid in which an alkali metal hydroxide compound, especially lithium hydroxide, and a cobalt compound, especially cobalt chloride, are added to an aqueous solution containing lithium halide, so it is suitable for metal materials. On the other hand, since it has a corrosion suppressing effect and suppresses the amount of gas generated, it is possible to provide an absorption liquid that can extend the life of the constituent materials of an absorption refrigerator, prevent a pressure increase inside the machine, and maintain its capacity over a long period of time. Furthermore, a phosphate, especially lithium phosphate, or a borate is added to the absorption liquid.
特に四硼酸リチウム、モリブデン酸塩、特にモリブデン
酸リチウムのうちの一以上から成る添加物を添加するこ
とで腐蝕抑制及びガス発生防止効果を高めることができ
る。In particular, the effect of inhibiting corrosion and gas generation can be enhanced by adding an additive consisting of one or more of lithium tetraborate, molybdate, and especially lithium molybdate.
Claims (1)
収冷凍機用吸収液において、前記吸収液に（ａ）水酸化
アルカリ金属化合物と（ｂ）コバルト化合物とを含有さ
せたことを特徴とする吸収冷凍機用吸収液。 ２、（ｃ）添加剤として、（イ）燐酸塩、（ロ）硝酸塩
、（ハ）モリブデン酸塩の中の少くとも一以上から成る
添加物を含有させたことを特徴とする請求項１記載の吸
収冷凍機用吸収液。 ３、（ａ）水酸化アルカリ金属化合物が水酸化リチウム
であり、（ｂ）コバルト化合物が塩化コバルトであるこ
とを特徴とする請求項１または請求項２記載の吸収冷凍
機用吸収液。 ４、（ａ）水酸化アルカリ金属化合物の濃度が、０．０
５〜０．５重量％であり、（ｂ）コバルト化合物の濃度
が、０．００５〜０．１重量％であることを特徴とする
請求項１ないし請求項３記載の吸収冷凍機用吸収液。 ５、（ｃ）添加剤の（イ）燐酸塩が燐酸リチウムであり
、（ロ）硼酸塩が四硼酸リチウムであり、（ハ）モリブ
デン酸塩がモリブデン酸リチウムであることを特徴とす
る請求項２記載の吸収冷凍機用吸収液。 ６、（ｃ）添加剤の（イ）燐酸塩、（ロ）硼酸塩、（ハ
）モリブデン酸塩の各々の濃度が０．００５〜０．１重
量％であることを特徴とする請求項２または請求項５記
載の吸収冷凍機用吸収液。[Claims] 1. An absorption liquid for an absorption refrigerator whose absorption liquid is an aqueous solution containing lithium halide, the absorption liquid containing (a) an alkali metal hydroxide compound and (b) a cobalt compound. An absorption liquid for absorption refrigerators characterized by: 2. Claim 1, characterized in that the additive (c) contains at least one of (a) phosphates, (b) nitrates, and (c) molybdates. Absorption liquid for absorption refrigerators. 3. The absorption liquid for an absorption refrigerator according to claim 1 or 2, wherein (a) the alkali metal hydroxide compound is lithium hydroxide, and (b) the cobalt compound is cobalt chloride. 4. (a) The concentration of the alkali metal hydroxide compound is 0.0
5 to 0.5% by weight, and the concentration of (b) the cobalt compound is 0.005 to 0.1% by weight, the absorption liquid for absorption refrigerators according to claims 1 to 3. . 5. A claim characterized in that (i) the phosphate of the (c) additive is lithium phosphate, (b) the borate is lithium tetraborate, and (c) the molybdate is lithium molybdate. 2. The absorption liquid for an absorption refrigerator according to 2. 6. Claim 2, wherein the concentration of each of (a) phosphate, (b) borate, and (c) molybdate of the (c) additive is 0.005 to 0.1% by weight. Or the absorption liquid for an absorption refrigerator according to claim 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63301304A JPH0641585B2 (en) | 1988-11-29 | 1988-11-29 | Absorption liquid for absorption refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63301304A JPH0641585B2 (en) | 1988-11-29 | 1988-11-29 | Absorption liquid for absorption refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02147689A true JPH02147689A (en) | 1990-06-06 |
| JPH0641585B2 JPH0641585B2 (en) | 1994-06-01 |
Family
ID=17895230
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63301304A Expired - Fee Related JPH0641585B2 (en) | 1988-11-29 | 1988-11-29 | Absorption liquid for absorption refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0641585B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5547600A (en) * | 1995-05-05 | 1996-08-20 | Carrier Corporation | Absorption refrigeration system working fluid with molybdate, borate, silicate inhibitor blend |
| US5766504A (en) * | 1995-06-30 | 1998-06-16 | Kawasaki Jukogyo Kabushiki Kaisha | Absorbent composition for an absorption refrigeration system |
| US6004476A (en) * | 1997-07-26 | 1999-12-21 | Fmc Corporation | Corrosion inhibiting solutions and processes for refrigeration systems comprising heteropoly complex anions of transition metal elements additional additives |
| US6620341B1 (en) | 1999-12-23 | 2003-09-16 | Fmc Corporation | Corrosion inhibitors for use in oil and gas wells and similar applications |
| US6758988B1 (en) | 1999-09-07 | 2004-07-06 | Fmc Corporation | Corrosion inhibiting solutions for absorption systems |
-
1988
- 1988-11-29 JP JP63301304A patent/JPH0641585B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5547600A (en) * | 1995-05-05 | 1996-08-20 | Carrier Corporation | Absorption refrigeration system working fluid with molybdate, borate, silicate inhibitor blend |
| EP0741179A1 (en) * | 1995-05-05 | 1996-11-06 | Carrier Corporation | Absorption refrigeration system working fluid with corrosion inhibitor and method of manufacture |
| JPH08313099A (en) * | 1995-05-05 | 1996-11-29 | Carrier Corp | Absorption type refrigeration system and working fluid |
| US5766504A (en) * | 1995-06-30 | 1998-06-16 | Kawasaki Jukogyo Kabushiki Kaisha | Absorbent composition for an absorption refrigeration system |
| US6004476A (en) * | 1997-07-26 | 1999-12-21 | Fmc Corporation | Corrosion inhibiting solutions and processes for refrigeration systems comprising heteropoly complex anions of transition metal elements additional additives |
| US6758988B1 (en) | 1999-09-07 | 2004-07-06 | Fmc Corporation | Corrosion inhibiting solutions for absorption systems |
| US7410596B2 (en) | 1999-09-07 | 2008-08-12 | Rocky Research | Corrosion inhibiting solutions for absorption systems |
| US6620341B1 (en) | 1999-12-23 | 2003-09-16 | Fmc Corporation | Corrosion inhibitors for use in oil and gas wells and similar applications |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0641585B2 (en) | 1994-06-01 |
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