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Dewatering agent, pre-rinsing agent, dewatering method and dewatering device

A technology of dehydrating agent and pre-washing agent, which is applied in cleaning methods and utensils, separation methods, chemical instruments and methods, etc., and can solve problems such as ozone layer destruction

Inactive Publication Date: 2012-04-11
TOKUYAMA METEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the use of HCFC225 and HCFC141b is expected to be banned by 2020 due to problems such as ozone layer depletion

Method used

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  • Dewatering agent, pre-rinsing agent, dewatering method and dewatering device
  • Dewatering agent, pre-rinsing agent, dewatering method and dewatering device
  • Dewatering agent, pre-rinsing agent, dewatering method and dewatering device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5 and comparative example 1～16

[0306] (1) Water separation test

[0307] 14 g of water and 14 g of component (a1) were added to a 30 mL sample tube, shaken by hand for 1 minute, the sample tube was immersed in a constant temperature water tank set at 25° C. for 30 minutes, and uniform dissolution was visually confirmed. After transferring it to a constant temperature water bath set at 55° C. for 30 minutes, it was taken out and its appearance was observed. In the evaluation of water separability, the external appearance was evaluated by visually observing the state of phase separation. Evaluations are based on the following benchmarks.

[0308] "◎": Uniformly dissolved at 25°C and phase-separated at 55°C. Furthermore, the concentration of the component (a1) in the water layer is 20% by mass or less.

[0309] "○": Uniformly dissolved at 25°C and phase-separated at 55°C.

[0310] "x": Uniformly dissolved at any temperature of 25°C and 55°C.

Embodiment 1～5

[0312] Table 1 summarizes the results of the water separation test for each dehydrating agent described in Table 1. When the liquid temperature was increased from 25°C to 55°C, phase separation occurred in all the glycol ethers (a1) compounded in the dehydrating agent. From this, it was confirmed that the water dissolved in the dehydrating agent (a) can be separated. In Example 4 in particular, it was confirmed that the concentration of the glycol ether (a1) in the water layer was 20% by mass or less, and the drainage load was small.

Embodiment 6～26

[0318] (2) Dehydration test

[0319] The stainless steel wire mesh was dehydrated with each dehydrating agent, and the dehydration property was measured by the following operation.

[0320] 30 mesh stainless steel wire mesh (27cm 2 ) was immersed in distilled water, and ultrasonic waves (28 kHz) were applied for 30 seconds to prepare a sample. Ultrasonic dehydration (28kHz) was performed for 1 minute using 100 mL of dehydrating agent at 25°C. A mixture of butyl ether and methyl perfluoroisobutyl ether (trade name: Novec HFE-7100, manufactured by Sumitomo 3M Co., Ltd.) (Solkane365mfc / Novec HFE-7100=88 / 12% by mass) was rinsed and steam-dried, and then used Water was extracted with 30 mL of anhydrous methanol, and water was measured by the Karl Fischer method. Evaluations are based on the following benchmarks.

[0321] "○": Residual water content is less than 10mg / tablet

[0322] "×": The residual water content is greater than or equal to 10mg / tablet

[0323] Dehydration pr...

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Abstract

Disclosed are: a dewatering agent which exhibits good dewatering performance in removing water sticking to the surface of a subject to be washed, has a low toxicity and a low flammability and is free from the ozone depletion problem; a pre-rinsing agent; and a dewatering method and a dewatering device using the same. Specifically disclosed is a dewatering agent (a) containing a glycol ether [component (a1)] which lowers the solubility of water when liquid temperature is increased.

Description

technical field [0001] The present invention relates to a dehydrating agent, a pre-washing agent, a dehydrating method and a dehydrating device suitable for removing moisture adhering to the surface of objects to be cleaned after dehydrating precision instruments, optical instruments, electronic instruments and general metal parts. Background technique [0002] In the case of washing and dehydrating components such as precision instruments, optical instruments, electronic instruments, and general machinery, the method of rinsing with pure water after treatment with an appropriate cleaning agent corresponding to the pollutant is widely used, but in the end It is desirable to remove the water present on the surface of the item being cleaned. Physical methods such as heating, decompression, and centrifugation are used as dehydration means, but dehydration methods using solvents are widely used in view of excellent dehydration performance, low energy consumption and rapid drying...

Claims

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Application Information

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IPC IPC(8): B01D12/00B08B3/08C23G5/00F26B5/00
CPCF26B5/005
Inventor 松本省慈
Owner TOKUYAMA METEL
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