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Powder antifoaming agent and method for producing same

A powder antifoaming agent and technology for manufacturing method, applied in separation method, chemical instrument and method, foam dispersion/prevention, etc., can solve the problem of unsuitable amount of food additives, and achieve the effect of excellent storage stability

Inactive Publication Date: 2014-07-23
SHIN ETSU CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the powder defoamer adsorbed on oil-absorbing porous powder such as silica, alumina, talc, etc., due to its composition, a large amount of powder residue remains, so even if it is used in wastewater treatment, chemical industry, and pesticide industry It is also not suitable for the food industry where there is a limit on the amount of use as a food additive
In addition, the powder defoamer using the above-mentioned porous powder has the disadvantage of being significantly inferior to emulsion-type defoamers in terms of water dispersibility and quick-acting properties.

Method used

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  • Powder antifoaming agent and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] The above-mentioned oil compound (1-a) (6.40% by mass) as the silicone oil compound (1), (c-1) sorbitan monostearate (0.80% by mass) as the surfactant (C) mass %), (c-3) decaglycerol monooleate (0.20 mass %), (c-4) glycerol monostearate (0.40 mass %), as (D) water which is solid at 25°C (d-1) maltodextrin (12.00% by mass) as a soluble encapsulant, sodium carboxymethylcellulose (0.05% by mass) as a thickener (F) and a part of water as (E) are specified by weighing amount, heated to 80°C and uniformly mixed with a homomixer, then slowly added the remaining amount (80.15% by mass) of component (E) water to prepare an emulsion (aqueous dispersion) of the composition shown in Table 1 ( In parentheses is the final composition as an emulsion).

[0096] Next, using this emulsion, spray drying was carried out under the spray conditions shown in Table 1 (drying inlet temperature (actual measurement) 169°C, drying outlet temperature (actual measurement) 63°C) to obtain a powder d...

Embodiment 2

[0098] In Example 1, powder defoaming was obtained under the same conditions as in Example 1 except that the spraying conditions in the spray drying method were changed (drying inlet temperature (actual measurement) 151°C, drying outlet temperature (actual measurement) 60°C) agent.

Embodiment 3

[0100] The above-mentioned oil compounds (1-a) (2.00% by mass) and (1-b) (4.00% by mass) as silicone oil compound (1), (c-1) as (C) surfactant Sorbitan monostearate (0.80 mass%), (c-2) sorbitan monolaurate (0.40 mass%), (c-4) glycerol monostearate (0.20 mass%) , (c-5) sucrose stearate (0.10% by mass), (D) (d-1) maltodextrin (12.00% by mass) which is a solid water-soluble encapsulating agent at 25°C, A part of (E) water was weighed to a predetermined amount, heated to 80°C, and uniformly mixed with a homomixer, and then the remaining amount (81.10% by mass) of component (E) water was slowly added to prepare the composition shown in Table 1 The emulsion (water dispersion) (in brackets is the final composition as the emulsion).

[0101] Next, using this emulsion, spray drying was carried out under the spray conditions shown in Table 1 (drying inlet temperature (actual measurement) 148°C, drying outlet temperature (actual measurement) 59°C) to obtain a powder dispersant foaming ...

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Abstract

The present invention relates to a powder antifoaming agent which contains: (A) a hydrophobic organopolysiloxane that has a viscosity at 25 DEG C of 10-100,000 mm2 / s; (B) a fine silica powder; (C) a surfactant; and (D) a water-soluble encapsulating agent that is in a solid state at 25 DEG C. This powder antifoaming agent is characterized by being obtained by spray drying a dispersion liquid that is obtained by dispersing a silicone oil compound, which is obtained by mixing the component (A) and the component (B), and the component (D) in water in the presence of the component (C), and is also characterized in that the silicone oil compound is encapsulated by the component (D) that serves as an outer shell. Since the powder antifoaming agent of the present invention does not contain water by being produced by a spray drying method, the powder antifoaming agent is free from problems of emulsion antifoaming agents such as separation and putrefaction, thereby exhibiting extremely excellent storage stability.

Description

technical field [0001] The invention relates to a powder type silicone defoamer and a manufacturing method thereof. Background technique [0002] Compared with other defoamers, silicone-based defoamers have various excellent properties, so they have been widely used in the chemical industry, food industry, petroleum industry, textile industry, paper industry, pulp industry, pharmaceutical industry, etc. It is used in a wide range of applications such as the manufacturing process of bubbles, wastewater treatment, and human waste treatment processes. As this silicone-based antifoaming agent, an emulsion-type antifoaming agent obtained by dispersing an oil compound obtained by mixing silicone oil such as dimethylpolysiloxane and fine powdered silica in water together with a surfactant has been used. generic. Since this emulsion-type antifoaming agent is excellent in dispersibility in a foaming liquid, when it is added to a foaming part, the antifoaming effect is exhibited imm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04A23L29/00
CPCB01D19/0409B01D19/0404C08J3/122C08K9/10C11D3/0026C08J3/126C08K13/02
Inventor 樱井孝冬入船真治
Owner SHIN ETSU CHEM CO LTD
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