Compound low-foam surfactant for mineral oil emulsification as well as preparation method and application thereof

Abstract

The invention discloses a low-foam surfactant for emulsifying compound mineral oil as well as a preparation method and application of the low-foam surfactant. The low-foam surfactant is prepared from organic ammonium ester TPP, Span S-80, Tween 80, Yangba XP50 and deionized water. The preparation method comprises the following steps: mixing organic ammonium ester TPP and span-80 under a first condition; adding Tween 80 and Yangba XP50, and mixing under a second condition; the problems that a traditional surfactant for white oil emulsification is too much in foam, heavy in environmental burden, insufficient in stability and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of surfactants, in particular to a compound low-foaming surfactant for mineral oil emulsification, a preparation method and an application thereof. Background Art

[0002] Through white oil emulsification technology, industrial cleaning can achieve the unification of efficient oil removal, water resource conservation and environmental compliance, and is widely used in mechanical manufacturing, energy chemical industry and other fields; traditional industrial cleaning and white oil emulsification systems mostly rely on high-foaming surfactants such as sodium dodecylbenzene sulfonate or silicon-containing defoaming agents, which have the following problems: First, excessive foam: multiple rinsing is required, increasing water consumption and wastewater treatment costs; second, heavy environmental burden: containing benzene rings or difficult-to-degrade components, which is not environmentally friendly; third, insufficient stability: easy to fail under acidic, alkaline or high temperature conditions, limiting application scenarios. Summary of the Invention

[0003] The purpose of the present invention is to provide a compound low-foaming surfactant for mineral oil emulsification, a preparation method and application thereof, which solves the problems of traditional surfactants for white oil emulsification such as excessive foaming, heavy environmental burden and insufficient stability.

[0004] In order to achieve the above object, the present invention provides a compound low-foaming surfactant for mineral oil emulsification, wherein the low-foaming surfactant comprises organic ammonium ester TPP, Span S-80, Tween 80, BA-YP50 and deionized water.

[0005] Preferably, the low-foaming surfactant comprises the following components in percentage by mass: 20-35% organic ammonium ester TPP, 8-18% Span S-80, 10-20% Tween 80, 15-25% Yamba XP50 and the balance deionized water.

[0006] The present invention also provides a method for preparing the above-mentioned compound low-foaming surfactant for mineral oil emulsification, the preparation method comprising:

[0007] a. Mixing organic ammonium ester TPP and Span S-80 under the first condition;

[0008] b. Add Tween 80 and BASF-YPC XP50 and mix under the second condition;

[0009] c. Add deionized water to obtain a low-foaming surfactant.

[0010] Preferably, the first condition includes: a temperature of 50-60° C. and a time of 10-15 minutes.

[0011] Preferably, the second condition includes: a temperature of 50-60° C. and a time of 25-35 min.

[0012] Preferably, Span S-80 is adjusted to HLB 7-9 when used.

[0013] Preferably, after adding deionized water, the mixture is treated by a high-pressure homogenizer to obtain a low-foaming surfactant, and the rotation speed of the high-pressure homogenizer is 14000-16000 rpm / 10 min.

[0014] The present invention also provides an application of the low-foaming surfactant in white oil emulsification, comprising mixing 48-52 wt% of white oil, 3.5-4.5 wt% of the low-foaming surfactant and the balance of deionized water, and then processing the mixture in a high shear emulsifier.

[0015] Preferably, the rotation speed of the high shear emulsifier is 11000-13000 rpm / 3 min.

[0016] The present invention provides a compounded low-foaming surfactant for mineral oil emulsification, comprising an organic ammonium ester TPP, Span S-80, Tween 80, BASF-YanbaXP50, and deionized water. The organic ammonium ester TPP is a cationic emulsifier that stabilizes the emulsion through electrostatic repulsion. Span S-80 adjusts the HLB (hydrophile-lipophile balance) to 7-9 during use, enhancing the compatibility of the surfactant with white oil. Tween 80 improves hydrophilicity and reduces dynamic interfacial tension. BASF-YanbaXP50, based on its polyether-fatty alcohol structure, provides low foaming, high wetting, and biodegradability. BASF XP-50, a novel nonionic surfactant, is fully biodegradable (degradation rate >90% according to the OECD 301B standard), has a wide pH range (pH 2-12), and low foaming properties. However, when used alone, it has limited emulsification ability for highly hydrophobic white oil. This invention utilizes a quaternary compound system, combining the charge-stabilizing effect of TPP with the green performance of XP50 to achieve synergistic benefits in emulsification, foam suppression, and environmental protection. The zwitterionic properties of TPP and the long-chain polyether of XP50 form a composite interface layer, inhibiting droplet coalescence. The molecular orientation of XP50 reduces liquid film elasticity, which, combined with the charge-neutralizing effect of TPP, reduces foam generation. All components are biodegradable (degradation rate ≥ 85%), making it suitable for environmentally friendly formulations.

[0017] Other features and advantages of the present invention will be described in detail in the following detailed description. DETAILED DESCRIPTION

[0018] The following is a detailed description of the specific embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0019] Example 1

[0020] 28g of organic ammonium ester TPP and 12g of Span S-80 were stirred at 55°C until homogeneous, then 15g of Tween 80 and 20g of Yamba XP50 were added, and stirring was continued at 55°C for 30min. Deionized water was slowly added and the mixture was treated with a high-pressure homogenizer (15000rpm / 10min) to obtain a transparent viscous liquid, i.e., a low-foaming surfactant.

[0021] Example 2

[0022] 20g of organic ammonium ester TPP and 8g of Span S-80 were stirred at 55°C until homogeneous, then 10g of Tween 80 and 15g of Yamba XP50 were added, and stirring was continued at 55°C for 30min. Deionized water was slowly added and the mixture was treated with a high-pressure homogenizer (15000rpm / 10min) to obtain a transparent viscous liquid, i.e., a low-foaming surfactant.

[0023] Example 3

[0024] 35g of organic ammonium ester TPP and 18g of Span S-80 were stirred at 55°C until homogeneous, then 20g of Tween 80 and 25g of Yamba XP50 were added, and stirring was continued at 55°C for 30min. Deionized water was slowly added and the mixture was treated with a high-pressure homogenizer (15000rpm / 10min) to obtain a transparent viscous liquid, i.e., a low-foaming surfactant.

[0025] Application Examples

[0026] 50g of white oil, 4g of a low-foaming surfactant, and 46g of deionized water were mixed and then processed in a high-shear emulsifier (12,000 rpm / 3 min). The resulting emulsion showed no oil precipitation after standing for 60 days, with a particle size D90 of less than 1 μm at pH 10 and a foam height of 3 mm (25°C). The low-foaming surfactant was applied to white oil emulsification and had low foaming properties: foam volume (Ross-Miles method, 50°C) ≤ 20mL, and the number of rinses was reduced by 50%. It also had high emulsification efficiency: the particle size D50 of the white oil emulsion (30% oil phase) was ≤ 0.3 μm (laser particle size analyzer), and stability (40°C / 30 days) showed no delamination. Furthermore, it had environmental performance: a 28-day biodegradation rate of >90%, and an emulsification efficiency fluctuation of <10% within the pH range of 2-12. Furthermore, it was industrially applicable: it was suitable for metal cleaning (decontamination rate >95%, GB / T 25097-2010) and high-concentration white oil emulsification (oil phase ≤60%).

[0027] Through the synergy of TPP and BA-YPC XP50, low foaming, high emulsification and full biodegradability are achieved, replacing traditional benzene / silicone systems; maintaining stable performance under strong acid / alkali, high salt (≤5% NaCl) and high temperature (≤80°C) conditions; and being compatible with white oil emulsification, metal cleaning, textile auxiliaries and other fields, reducing the cost of formula switching.

[0028] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0029] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0030] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A compound low-foaming surfactant for mineral oil emulsification, characterized in that: The low-foaming surfactant includes organic ammonium ester TPP, Span S-80, Tween 80, Yamba XP50 and deionized water.

2. The compound low-foaming surfactant for mineral oil emulsification according to claim 1, characterized in that The low-foaming surfactant comprises the following components in percentage by mass: 20-35% of organic ammonium ester TPP, 8-18% of Span S-80, 10-20% of Tween 80, 15-25% of Yamba XP50 and the balance of deionized water.

3. A method for preparing a compound low-foaming surfactant for mineral oil emulsification according to claim 1 or 2, characterized in that: The preparation method comprises: a. Mixing organic ammonium ester TPP and Span S-80 under the first condition; b. Add Tween 80 and BASF-YPC XP50 and mix under the second condition; c. Add deionized water to obtain a low-foaming surfactant.

4. The preparation method according to claim 3, characterized in that The first condition includes: temperature of 50-60°C and time of 10-15 minutes.

5. The preparation method according to claim 3, characterized in that The second condition includes: temperature of 50-60°C and time of 25-35 minutes.

6. The preparation method according to claim 3, characterized in that When using Span S-80, adjust the HLB to 7-9.

7. The preparation method according to claim 3, characterized in that After adding deionized water, the mixture is processed by a high-pressure homogenizer to obtain a low-foaming surfactant. The speed of the high-pressure homogenizer is 14000-16000 rpm / 10 min.

8. Use of the low-foaming surfactant according to claim 1 or 2 in white oil emulsification, characterized in that: 48-52 wt% of white oil, 3.5-4.5 wt% of low-foaming surfactant and the balance of deionized water are mixed, and then processed in a high shear emulsifier.

9. The use according to claim 8, characterized in that The speed of the high shear emulsifier is 11000-13000rpm / 3min.