WO2019104617A1 - Odor-free asphalt composition and preparation method therefor - Google Patents

Abstract

The present invention provides an odor-free asphalt composition, prepared from the following components in parts by weight: asphalt: 98-99; an odor inhibitor: 0.2-2; and an interfacial agent: 0.2-1. The odor inhibitor consists of 40-80% of an aldehyde compound and 20-60% of a carboxylic ester compound in percentage by weight. The odor-free asphalt composition of the present invention effectively inhibits, by means of action of the odor inhibitor and the interfacial agent, generation and volatilization of asphalt gas such as H₂S, SO₂, and NO_X in the asphalt production and construction processes, eliminates odor while the asphalt performance has no obvious change, and has the advantages of being environment-friendly, energy-saving, cost-effective, and convenient to construct. The present invention further provides a preparation method for the odor-free asphalt composition.

Description

Net taste asphalt composition and preparation method thereof Technical field

The invention belongs to the technical field of road engineering materials, and relates to a net taste asphalt composition and a preparation method thereof.

Background technique

The process of heating asphalt to lay roads, repair houses or make anti-corrosion coatings will generate a lot of asphalt fumes, which will have a serious impact on the surrounding environment and endanger people's health.

The flue gas contains a variety of organic substances, including carbocyclic hydrocarbons, cyclic hydrocarbon derivatives and other compounds, many of which have harmful effects on human health. Asphalt smoke contains various polycyclic aromatic hydrocarbons such as benzopyrene, benzopyrene and carbazole. "Substances", and most of them are carcinogenic and carcinogenic, with a particle size between 0.1 and 1.0 μm, a minimum of only 0.01 μm, and a maximum of about 10.0 μm, especially represented by 3,4-benzopyrene. A variety of carcinogenic substances. The main way to endanger human health is to adhere to the floating dust below 8um, and be sucked into the body through the respiratory tract. Therefore, it is necessary to purify the asphalt flue gas to make the emission meet the atmospheric environmental standards.

At present, the treatment of asphalt flue gas adopts the addition of flue gas purification device. For example, the absorption purification method utilizes the solubility of each mixed component in the exhaust gas in the selected absorbent, or a certain component and the active component in the absorbent. The reaction is to purify the exhaust gas; and the adsorption purification method is a method of accumulating or condensing one or more components in the fluid (gas or liquid) mixture on the surface with a porous solid (adsorption filter) to achieve the separation purpose; However, these flue gas treatment equipments have large investment in the early stage and high operating costs. They can only be used to control the collection of flue gas in the asphalt production process and reduce emissions, and it is impossible to avoid the re-discharge of asphalt flue gas in the subsequent asphalt construction application.

Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to overcome the above-mentioned drawbacks and to provide a net taste asphalt composition and a preparation method thereof, which can react with free radicals such as reactive oxygen species in the asphalt from the source to reduce the generation of asphalt smoke.

In order to solve the above technical problems, the present invention adopts the following technical solution: a net taste asphalt composition composed of the following raw materials in parts by weight:

98 to 99 parts of asphalt;

Odor inhibitor 0.8 to 2 parts;

The surfactant is 0.2 to 1 part.

Further, the asphalt is a straight-run asphalt, an oxidized asphalt, a semi-blowing asphalt, a heavy traffic polymer modified asphalt, a warm mixed asphalt, a high-viscosity asphalt, a natural asphalt, a tar pitch, and a colored asphalt binder. Kind or several.

Further, the odor inhibitor is composed of 40% to 80% by weight of an aldehyde compound and 20% to 60% by weight of a carboxylic acid ester compound.

Further, the aldehyde compound is one or more of vanillin, benzaldehyde, n-heptanal, trans, cis-2,6-nonadienal, trans-2-hexenal, hexadecanal .

Further, the carboxylic acid ester compound is methyl acetate, ethyl acetate, propyl acetate, n-butyl acetate, n-amyl acetate, amyl acetate, benzyl acetate, phenyl acetate, ethyl formate, acetic acid. One or more of ethyl ester, ethyl ester propionate, ethyl butyrate, ethyl valerate, ethyl stearate, ethyl phenyl acetate, ethyl benzoate and allyl hexanoate.

Further, the surfactant is a zwitterionic surfactant, and the zwitterionic surfactant is an alkyl imidazoline type halide or an alkylbetaine halide; wherein the alkyl group imidazoline type comprising a halide salt C ₁₂ ~ C ₁₈ alkyl imidazoline sodium halides, C ₁₂ ~ C ₁₈ alkyl imidazolinium halides, potassium phosphate, C ₁₂ ~ C ₁₈ alkyl imidazolinium halides sodium sulfite, C ₁₂ -C ₁₈ alkyl imidazoline halide potassium sulfite, C ₁₂ -C ₁₈ alkyl imidazoline halide sodium sulfate and C ₁₂ -C ₁₈ alkyl imidazoline halide potassium sulfate; the alkyl betaine halide Acid salts include C ₁₂ -C ₁₈ alkylamidopropyl betaine halide sodium phosphate, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium phosphate, C ₁₂ -C ₁₈ alkylamidopropyl betaine halogenated Sodium sulfite, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium sulfite, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide sodium sulfate and C ₁₂ -C ₁₈ alkylamidopropyl betaine Halide potassium sulfate.

Further, the odor suppressant has a heat-resistant temperature of not less than 220 ° C for 2 hours.

Further, the zwitterionic surfactant has a heat resistance temperature of not less than 220 ° C for 2 hours.

Further, the net taste asphalt composition is suitable for road asphalt, water conservancy hydroelectric asphalt, building roof asphalt, underground engineering waterproof asphalt and sand fixing asphalt.

The invention also provides a preparation method of the net taste asphalt composition, the steps are as follows:

(1) accurately weigh 98 to 99 parts of asphalt to 140 ~ 150 ° C, add 0.2 ~ 1 part of surfactant at 100 ~ 150r / min speed stirring, stirring for 15 ~ 20min;

(2) The mixture obtained in the step (I) is heated to 160 to 170 ° C, and 0.8 to 2 parts of an odor inhibitor is added under stirring at 100 to 150 rpm, and stirred for 15 to 20 minutes to prepare a neat asphalt composition.

The present invention also provides a net taste asphalt composition consisting of the following raw materials in parts by weight:

98 to 99 parts of asphalt;

Odor inhibitor 0.8 to 2 parts;

0.2 to 1 part of surfactant;

Wherein: the asphalt is a kind of straight-run asphalt, oxidized asphalt, semi-blowing asphalt, heavy traffic polymer modified asphalt, warm mixed modified asphalt, high-viscosity asphalt, natural asphalt, tar pitch and colored asphalt binder Or several

Wherein: the odor inhibitor consists of 40% to 80% by weight of an aldehyde compound and 20% to 60% by weight of a carboxylic acid ester compound;

Wherein: the aldehyde compound is one or more of vanillin, benzaldehyde, n-heptanal, trans, cis-2,6-nonadienal, trans-2-hexenal, hexadecanal;

Wherein: the carboxylic acid ester compound is methyl acetate, ethyl acetate, propyl acetate, n-butyl acetate, n-amyl acetate, amyl acetate, benzyl acetate, phenyl acetate, ethyl formate, acetic acid One or more of ester, ethyl ester propionate, ethyl butyrate, ethyl valerate, ethyl stearate, ethyl phenyl acetate, ethyl benzoate and allyl hexanoate.

The beneficial effects of the invention are: the net taste asphalt composition of the invention adds the odor inhibitor and the surfactant to the asphalt, and the strong chemical bond of the odor inhibitor has a strong capturing ability for the free radical in the asphalt production process, and can effectively asphalt locking harmful substances, suppressing _{H 2 S, SO 2, NO} X and other volatile bituminous fumes generated; the same time, effective surfactant dispersed in asphalt odor inhibitors, enhance the inhibition effect, and interfacial bitumen significantly reduced It can improve the workability of asphalt in production and construction, reduce the temperature required for asphalt production and construction, further reduce the formation and volatilization of asphalt flue gas, and has the characteristics of green environmental protection, energy saving, high cost performance and convenient construction.

Detailed ways

The invention discloses a net taste asphalt composition, which is composed of the following raw materials in parts by weight:

98 to 99 parts of asphalt;

Odor inhibitor 0.8 to 2 parts;

0.2 to 1 part of surfactant;

In the present invention, the asphalt is a straight-run asphalt, an oxidized asphalt, a semi-blowing asphalt, a heavy traffic polymer modified asphalt, a warm mixed asphalt, a high-viscosity asphalt, a natural asphalt, a tar pitch, and a colored asphalt binder. Kind or several.

In the present invention, the odor inhibitor is composed of 40% to 80% by weight of the aldehyde compound and 20% to 60% by weight of the carboxylic acid ester compound, and the odor inhibitor has a heat resistance temperature of not less than 220 ° C for 2 hours. .

In the present invention, the aldehyde compound is vanillin, benzaldehyde, n-heptanal, trans, cis-2, 6- One or more of decadienal, trans-2-hexenal, hexadecanal.

In the present invention, the carboxylic acid ester compound is methyl acetate, ethyl acetate, propyl acetate, n-butyl acetate, n-amyl acetate, amyl acetate, benzyl acetate, phenyl acetate, ethyl formate, acetic acid. One or more of ethyl ester, ethyl ester propionate, ethyl butyrate, ethyl valerate, ethyl stearate, ethyl phenyl acetate, ethyl benzoate and allyl hexanoate.

In the present invention, the surfactant is a zwitterionic surfactant having a heat resistance temperature of 220 ° C (≥ 2 hours). The zwitterionic surfactant is an alkyl imidazoline type halide salt or an alkyl betain base halide acid salt; wherein the alkyl imidazoline type halide acid salt comprises a C ₁₂ -C ₁₈ alkyl imidazoline halide phosphoric acid Sodium, C ₁₂ -C ₁₈ alkyl imidazoline halide potassium phosphate, C ₁₂ -C ₁₈ alkyl imidazoline halide sodium sulfite, C ₁₂ -C ₁₈ alkyl imidazoline halide potassium sulfite, C ₁₂ -C ₁₈ alkane imidazoline sulfate and halide, C ₁₂ ~ C ₁₈ alkyl imidazolines potassium halides; alkyl betaines halide salts include the C ₁₂ ~ C ₁₈ alkyl amidopropyl halide phosphate betaines, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium phosphate, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide sodium sulfite, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium sulfite , C ₁₂ -C ₁₈ alkylamidopropyl betaine halide sodium sulfate and C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium sulfate. The zwitterionic surfactant has a heat resistance temperature of not less than 220 ° C for 2 hours.

The net taste asphalt composition of the invention is suitable for road asphalt, water conservancy hydroelectric asphalt, building roof asphalt, underground engineering waterproof asphalt and sand fixing asphalt.

In addition, the present invention also provides a method for preparing a net taste asphalt composition, the steps are as follows:

(1) accurately weigh 98 to 99 parts of asphalt to 140 ~ 150 ° C, add 0.2 ~ 1 part of surfactant at 100 ~ 150r / min speed stirring, stirring for 15 ~ 20min;

(2) The mixture obtained in the step (I) is heated to 160 to 170 ° C, and 0.8 to 2 parts of an odor inhibitor is added under stirring at 100 to 150 rpm, and stirred for 15 to 20 minutes to prepare a neat asphalt composition.

The technical solution of the present invention will be described in detail below with reference to the embodiments.

Example 1

Weigh 99 parts of 70# petroleum pitch to 140 ° C by weight, add 0.2 parts of C ₁₆ alkyl imidazoline halide potassium phosphate under stirring at 150 r / min, stir for 15 min; heat up to 160 ° C, at 150 r / min 0.8 part of an odor suppressant was added with stirring, and the odor inhibitor consisted of vanillin, hexadecanal, n-butyl acetate and ethyl stearate. The prepared net taste asphalt composition, the conventional technical indicators for detecting asphalt are shown in Table 2.

Example 2

Weigh 98 parts of SBS modified asphalt to 150 ° C by weight, add 1 part of C ₁₈ alkylamidopropyl betaine halide sodium sulfite under stirring at 100 r / min, stir for 20 min; raise the temperature to 170 ° C, at 100 r / One part of the odor inhibitor was added under stirring at a speed of min. The odor inhibitor consisted of benzaldehyde, n-heptanal, ethyl benzoate and allyl hexanoate. The prepared net taste asphalt composition, the conventional technical indicators for detecting asphalt are shown in Table 2.

Example 3

Weigh 98.5 parts of rubber modified asphalt to 150 ° C by weight, add 0.4 parts of C ₁₆ alkyl imidazoline halide potassium phosphate under stirring at 150 r / min, stir for 15 min; raise the temperature to 170 ° C, at 100 r / min Two parts of the odor inhibitor were added with stirring, and the odor inhibitor consisted of vanillin, hexadecanal, n-butyl acetate and ethyl stearate. The prepared net taste asphalt composition, the conventional technical indicators for detecting asphalt are shown in Table 2.

Example 4

Weigh 98.5 parts of rubber modified asphalt to 140 ° C by weight, add 0.6 parts of C ₁₆ alkyl imidazoline halide potassium phosphate under stirring at 150 r / min, stir for 15 min; raise the temperature to 165 ° C, at 150 r / min 1.4 parts of odor inhibitor was added with stirring. The odor inhibitor consisted of trans-2-, cis-6-nonadienal, trans-2-hexenal, n-butyl acetate, ethyl benzoate and stearic acid. Ester composition. The prepared net taste asphalt composition, the conventional technical indicators for detecting asphalt are shown in Table 2.

In the present invention, Comparative Examples 1 to 3 were compared with Examples 1 to 4, and Comparative Examples 1-3 were respectively as the original 70# petroleum asphalt, SBS modified asphalt and rubber modified asphalt, and the performance indexes thereof are shown in Table 2.

Table 1 is a six-grade scale of malodor intensity in Japan, and the malodor levels of the asphalt compositions obtained in Examples 1-4 and Comparative Examples 1-3 were evaluated according to this method, and the results are shown in Table 3.

Table 1 Japan's malodor intensity level

strength	index
0	Tasteless
1	I can barely feel the smell
2	Smell weak but distinguishable nature
3	It is easy to feel the smell
4	Strong smell
5	Unbearable strong smell

Table 2 asphalt performance indicators

project	Comparative example 1	Example 1	Comparative example 2	Example 2	Comparative example 3	Example 3	Example 4
Softening point / °C	46.8	46.7	62.3	62.5	58.6	58.8	57.9
Penetration / 0.1mm	68	66	51	50	46	50	51

10 °C ductility / cm	56.5	58.1	-	-	-	-	-
5°C ductility/cm	-	-	35.6	33.9	41.5	39.4	40.2
135 ° C viscosity	0.470	0.420	2.48	2.35	2.95	2.68	2.79

Table 3 odor strength evaluation table

Stench level	Comparative example 1	Example 1	Comparative example 2	Example 2	Comparative example 3	Example 3	Example 4
strength	3	1	3	1	4	1	1

It can be seen from the above Table 2 that after the odor inhibitor and the surfactant are added to the asphalt-based asphalt composition of the present invention, the performance index of the asphalt itself does not change significantly, and the relevant technical indicators meet the "Technical Specifications for Highway Engineering Construction". (JTG F40-2004) related requirements, in which the 135 ° C viscosity of the examples is somewhat reduced compared to the comparative examples, indicating that the composition of the present invention can improve the workability of the asphalt in production and construction.

As can be seen from the malodor strength evaluation table of Table 3, the malodor strength level of the net taste asphalt composition of the present invention is significantly lower than that of the conventional asphalt, and the odor of the asphalt by the technique of the present invention is remarkably eliminated.

The net taste asphalt composition of the invention adds the odor inhibitor and the surfactant to the asphalt, and the strong chemical bond of the odor inhibitor has a strong capturing ability for the free radical in the asphalt production process, can effectively lock the harmful substances in the asphalt, and inhibit _{H 2 S, SO 2, NO} X and other volatile bituminous fumes generated; the same time, effective surfactant dispersed in asphalt odor inhibitors, enhance the inhibition effect, and significantly reduces the interfacial energy of asphalt, bitumen production and to improve The workability of construction reduces the temperature required for asphalt production and construction, further reduces the formation and volatilization of asphalt flue gas, and has the characteristics of green environmental protection, energy saving, high cost performance and convenient construction.

The above is a further detailed description of the present invention in connection with the specific preferred embodiments, and the specific embodiments of the present invention are not limited to the description. It will be apparent to those skilled in the art that the present invention may be made without departing from the spirit and scope of the invention.

Claims (15)

1. A net taste asphalt composition consisting of the following raw materials in parts by weight:

   98 to 99 parts of asphalt;

   Odor inhibitor 0.8 to 2 parts;

   The surfactant is 0.2 to 1 part.
2. The net taste asphalt composition according to claim 1, wherein the asphalt is straight-run asphalt, oxidized asphalt, semi-blowing asphalt, heavy traffic polymer modified asphalt, warm mixed asphalt, high-viscosity asphalt, natural One or more of asphalt, tar pitch and colored asphalt binder.
3. The neat bitumen composition according to claim 1, wherein said odor suppressant is composed of 40% to 80% by weight of an aldehyde compound and 20% to 60% by weight of a carboxylic acid ester compound.
4. The neat asphalt composition according to claim 3, wherein the aldehyde compound is vanillin, benzaldehyde, n-heptanal, trans, cis-2,6-nonadienal, trans-2-hexan One or more of alkenal and hexadecanal.
5. The neat bitumen composition according to claim 3, wherein the carboxylate compound is methyl acetate, ethyl acetate, propyl acetate, n-butyl acetate, n-amyl acetate, amyl acetate, acetic acid. Benzyl ester, phenyl acetate, ethyl formate, ethyl acetate, ethyl propionate, ethyl butyrate, ethyl valerate, ethyl stearate, ethyl phenyl acetate, ethyl benzoate and caproic acid One or several of allyl esters.
6. The neat bitumen composition according to claim 1, wherein: said surfactant is a zwitterionic surfactant, and said zwitterionic surfactant is an alkyl imidazoline type halide or alkyl beet. An alkali halide acid salt; wherein the alkyl imidazoline type halide acid salt comprises a C ₁₂ -C ₁₈ alkyl imidazoline halide sodium phosphate, a C ₁₂ -C ₁₈ alkyl imidazoline halide potassium phosphate, C ₁₂ -C ₁₈ alkyl imidazoline halide sodium sulfite, C ₁₂ -C ₁₈ alkyl imidazoline halide potassium sulfite, C ₁₂ -C ₁₈ alkyl imidazoline halide sodium sulfate and C ₁₂ -C ₁₈ alkyl imidazoline halogenated was potassium; halide salts of the alkyl betaines include C ₁₂ ~ C ₁₈ alkyl amidopropyl halide phosphate betaines, C ₁₂ ~ C ₁₈ alkyl amidopropyl halide potassium phosphate betaines, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide sodium sulfite, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium sulfite, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide sodium sulfate and C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium sulphate.
7. The neat bitumen composition according to claim 1, wherein the odor suppressant has a heat resistance temperature of not less than 220 ° C for 2 hours.
8. The neat bitumen composition according to claim 6, wherein the zwitterionic surfactant has a heat resistance temperature of not less than 220 ° C for 2 hours.
9. The neat bitumen composition according to claim 1, wherein the net bituminous composition is suitable for road asphalt, water and hydroelectric bitumen, building roof asphalt, underground engineering waterproof asphalt, and sand fixing asphalt.
10. A method for preparing a neat bituminous composition according to claim 1, wherein the steps are as follows:

    (1) accurately weigh 98 to 99 parts of asphalt to 140 ~ 150 ° C, add 0.2 ~ 1 part of surfactant at 100 ~ 150r / min speed stirring, stirring for 15 ~ 20min;

    (2) The mixture obtained in the step (I) is heated to 160 to 170 ° C, and 0.8 to 2 parts of an odor inhibitor is added under stirring at 100 to 150 rpm, and stirred for 15 to 20 minutes to prepare a neat asphalt composition.
11. A net taste asphalt composition consisting of the following raw materials in parts by weight:

    98 to 99 parts of asphalt;

    Odor inhibitor 0.8 to 2 parts;

    0.2 to 1 part of surfactant;

    Wherein: the asphalt is a kind of straight-run asphalt, oxidized asphalt, semi-blowing asphalt, heavy traffic polymer modified asphalt, warm mixed modified asphalt, high-viscosity asphalt, natural asphalt, tar pitch and colored asphalt binder Or several

    Wherein: the odor inhibitor consists of 40% to 80% by weight of an aldehyde compound and 20% to 60% by weight of a carboxylic acid ester compound;

    Wherein: the aldehyde compound is one or more of vanillin, benzaldehyde, n-heptanal, trans, cis-2,6-nonadienal, trans-2-hexenal, hexadecanal;

    Wherein: the carboxylic acid ester compound is methyl acetate, ethyl acetate, propyl acetate, n-butyl acetate, n-amyl acetate, amyl acetate, benzyl acetate, phenyl acetate, ethyl formate, acetic acid One or more of ester, ethyl ester propionate, ethyl butyrate, ethyl valerate, ethyl stearate, ethyl phenyl acetate, ethyl benzoate and allyl hexanoate.
12. The neat asphalt composition according to claim 11, wherein: said surfactant is a zwitterionic surfactant, and said zwitterionic surfactant is an alkyl imidazoline type halide or alkyl beet. An alkali halide acid salt; wherein the alkyl imidazoline type halide acid salt comprises a C ₁₂ -C ₁₈ alkyl imidazoline halide sodium phosphate, a C ₁₂ -C ₁₈ alkyl imidazoline halide potassium phosphate, C ₁₂ -C ₁₈ alkyl imidazoline halide sodium sulfite, C ₁₂ -C ₁₈ alkyl imidazoline halide potassium sulfite, C ₁₂ -C ₁₈ alkyl imidazoline halide sodium sulfate and C ₁₂ -C ₁₈ alkyl imidazoline halogenated was potassium; halide salts of the alkyl betaines include C ₁₂ ~ C ₁₈ alkyl amidopropyl halide phosphate betaines, C ₁₂ ~ C ₁₈ alkyl amidopropyl halide potassium phosphate betaines, C ₁₂ -C ₁₈ alkylamidopropyl betaine Halide sodium sulfite, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium sulfite, C ₁₂ -C ₁₈ alkylamidopropyl betaine halide sodium sulfate and C ₁₂ -C ₁₈ alkylamidopropyl betaine halide potassium sulphate.
13. The neat asphalt composition according to claim 11, wherein the odor suppressant has a heat-resistant temperature of not less than 220 ° C for 2 hours.
14. The neat asphalt composition according to claim 12, wherein the zwitterionic surfactant has a heat resistance temperature of not less than 220 ° C for 2 hours.
15. The neat bitumen composition according to claim 11, wherein: the neat bituminous composition is suitable for road asphalt, water and hydroelectric bitumen, building roof bitumen, underground engineering waterproof bitumen, and sand-fixing bitumen.