CN114350021A - Asphalt smoke inhibitor, environment-friendly low-smoke asphalt containing asphalt smoke inhibitor and preparation method of environment-friendly low-smoke asphalt - Google Patents
Asphalt smoke inhibitor, environment-friendly low-smoke asphalt containing asphalt smoke inhibitor and preparation method of environment-friendly low-smoke asphalt Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L95/00—Compositions of bituminous materials, e.g. asphalt, tar, pitch
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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Abstract
The invention provides an asphalt smoke inhibitor, environment-friendly low-smoke asphalt containing the asphalt smoke inhibitor and a preparation method thereof. The asphalt smoke inhibitor comprises di-tert-butyl hydroquinone, an oxidation promoter and cuprous chloride which are respectively and independently packaged, wherein the mass percentages of the cuprous chloride, the di-tert-butyl hydroquinone and the oxidation promoter in the asphalt smoke inhibitor are respectively 40%, 40% and 20%. The environment-friendly low-smoke asphalt is prepared from the following raw materials in parts by weight: 99.2 to 99.8 portions of asphalt and 0.2 to 0.8 portion of asphalt smoke inhibitor. One of the advantages of the inventive asphalt smoke suppressant is that it does not alter the properties of the asphalt and even improves the aging of the asphalt. Secondly, the inhibition effect on the asphalt smoke can reach more than 50 percent, and the inhibition effect is very obvious.
Description
Technical Field
The invention relates to an asphalt smoke inhibitor, environment-friendly low-smoke asphalt containing the asphalt smoke inhibitor and a preparation method thereof, belonging to the technical field of chemical materials.
Background
Asphalt, as a main raw material for road construction, is a very complex mixture of hydrocarbons and their derivatives with different molecular weights. During use, particularly under high temperature conditions of pavement paving, a large amount of volatile substances, namely asphalt smoke, is generated. The asphalt fume is a special environmental pollutant, mainly comprises liquid hydrocarbon particles, gaseous hydrocarbons and derivatives thereof, and the polycyclic aromatic hydrocarbon contained in the asphalt fume has great harm to human bodies. The invention discloses a compound asphalt smoke inhibitor which is formed by controlling asphalt smoke at an asphalt smoke generation source and combining a large number of tests to verify on the basis of researching the asphalt smoke generation mechanism and based on the best means for controlling the environmental harm of the asphalt smoke. According to the invention, the additive of the compound asphalt smoke inhibitor can obviously reduce the release amount of asphalt smoke in the heating process of asphalt, does not deteriorate the performance of the asphalt, and can improve the performance of the asphalt to a certain extent.
The prior art relating to asphalt smoke inhibitors is mainly the following:
1) the invention relates to a smell-free colored asphalt composition and a preparation method thereof, and the patent publication number is as follows: CN 108276784A.
The odor-free colored asphalt composition reduces H in the production and construction processes of colored asphalt through the action of an odor inhibitor and an interfacial agent2S、SO2、NOxAnd the generation and volatilization of asphalt smoke can achieve the obvious odor eliminating effect. The main technology of the invention is to add various surface active substances and the like to adsorb H with pungent odor in asphalt smoke2S、SO2、NOxEtc. to eliminate the offensive odor generated during the heating of asphalt.
The asphalt fume is composed of liquid hydrocarbon particles, gaseous hydrocarbons and their derivatives, and has very complex components and pungent odor2S、SO2、NOxEtc. are but a few of them. The main technical point of the patent is to purify the smell in the process of processing the color asphalt by adsorbing and reacting the processed asphalt by additivesThe gas with pungent odor is released in the process.
2) The invention discloses a smell-free high-viscosity asphalt modifier and an asphalt mixture thereof, and the patent publication number is as follows: CN 111662033 a.
The invention prepares modified asphalt by adding thermoplastic elastomer (an asphalt modifier), rubber polymer (an asphalt modifier), thermoplastic resin (an asphalt modifier), odor inhibitor, surfactant and the like into asphalt. The invention indicates that the odor inhibitor is used for H in asphalt smoke in the construction process2S，SO2，NOXAnd the like, and the odor purification principle is adsorption, neutralization reaction and the like. Thermoplastic elastomers and the like are asphalt modifiers which improve the properties of asphalt products. Therefore, from the technical point of view, the invention provides a modifier for asphalt products, which can improve the performance of the asphalt products and can adsorb H generated in asphalt smoke in the using process2S，SO2，NOXAnd the like, so that the pungent odor of the asphalt product is reduced.
3) The invention discloses an environment-friendly asphalt odor purifying agent product and a preparation method and application thereof, and the patent publication number is as follows: CN 112126237 a.
The invention relates to an environment-friendly asphalt odor purifying agent product, and a preparation method and application thereof. The product is an odor inhibitor formed by a sacrificial agent, a solvent, a slow release agent, a surfactant, a solubilizer and an adsorbent, and the odor inhibitor can inhibit the generation of hydrogen sulfide through the synergistic process of chemical reaction and physical adsorption, so that the content of hydrogen sulfide in asphalt smoke is effectively reduced.
The odor inhibitor mainly aims at inhibiting hydrogen sulfide generated in the asphalt heating process, and the principle is to carry out physical adsorption and generate chemical reaction on the generated hydrogen sulfide, namely to consume the generated hydrogen sulfide rather than inhibit the generation of the hydrogen sulfide.
4) The doctor of Wuhan university of science and technology "asphalt VOC analysis technology and inhibition method research" researches the inhibition of volatile components in asphalt. The paper developed three monomeric inhibitors, including SBS, activated carbon and LDHs, and two complex inhibitors, one consisting of 4% SBS + 4% activated carbon and the other consisting of 5% SBS + 4% activated carbon. As is well known, SBS is an asphalt modifier, commonly used to prepare SBS modified asphalt; activated carbon is an adsorbent material and it is demonstrated that the inhibitory effect of LDHs is only due to the molecular structure itself slowing down the aging process of pitch.
5) The article is represented by 1# to 4# codes for four inhibitors used, and does not list specific components, but the article indicates that the inhibitor can be used for preparing modified asphalt. The inhibitor in the paper can inhibit the asphalt smoke from being generated by inhibiting the asphalt from being oxidized at a hot temperature, and cannot achieve the effect of modifying the asphalt. From the viewpoint of evaluating the inhibition effect of asphalt smoke, the quality change of asphalt in an aging process is adopted, and because the quality change is related to two factors in the aging process of the existing asphalt, firstly, the volatilization of volatile light components and the release of the asphalt smoke can cause the quality of the asphalt to be reduced, and the aging process of the asphalt is an oxidation reaction which can cause the quality of the asphalt to be increased, the quality change is used for representing the inhibition effect of the asphalt smoke, and the characterization is not accurate from the professional viewpoint.
From the existing available data, the two methods for inhibiting the asphalt smoke are mainly adopted, wherein one method is to change the performance of the asphalt by adding an asphalt modifier, such as SBS or rubber powder; the other is to add a smell cleaning agent which reduces H in the asphalt smoke mainly by means of adsorption and reaction2S、SO2And NOx, etc.
These methods mainly have the following technical problems:
1) the asphalt is modified by adding SBS or rubber powder, so that the release of asphalt smoke is reduced. As is well known, the modified asphalt can be prepared by adding SBS and rubber powder, so that the performance index of the asphalt is greatly changed; but at the same time, the stability of the performance of the modified asphalt is poor, and the storage for a long time is not favorable.
2) The odor deodorant is added, and the odor can be analyzed from the level of the pungent odor, so that the pungent odor in the asphalt smoke can be reduced, but the asphalt smoke is composed of solid particles, liquid particles and gas, particularly, polycyclic aromatic hydrocarbon compounds contained in the asphalt smoke have great harm to the environment, and only the generated pungent gas is adsorbed, so that the purpose of reducing the pungent odor of the asphalt smoke can be achieved, and the effect of inhibiting the release of the asphalt smoke is not achieved.
The invention aims to research an effective asphalt smoke inhibitor, and the inhibitor can greatly reduce the release amount of asphalt smoke after being added into asphalt and has no influence on the technical performance of asphalt products.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an asphalt smoke inhibitor, environment-friendly low-smoke asphalt containing the asphalt smoke inhibitor and a preparation method thereof.
The invention is based on the best means for controlling the harm of the asphalt smoke to the environment, namely, the asphalt smoke is controlled at the generation source of the asphalt smoke, and under the condition of researching the release mechanism of the asphalt smoke, the release of the asphalt smoke is obtained by the oxidation reaction of asphalt molecules and oxygen in the air under the hot condition, the mechanism of the oxidation reaction is a free radical mechanism, and the release of the asphalt smoke can be caused in the process. Aiming at the chemical reaction principle of asphalt smoke release, a middle-environment-friendly low-smoke asphalt product is developed in a targeted manner, and the main problems are as follows:
firstly, an effective asphalt smoke inhibitor is successfully developed, and the inhibitor can greatly reduce the generation of asphalt smoke;
secondly, the addition of the inhibitor can not change the technical index of the asphalt.
The technical scheme of the invention is as follows:
an asphalt smoke inhibitor, characterized in that: the asphalt smoke inhibitor is composed of di-tert-butyl hydroquinone, an oxidation promoter and cuprous chloride which are respectively and independently packaged, wherein the mass percentages of the cuprous chloride, the di-tert-butyl hydroquinone and the oxidation promoter in the asphalt smoke inhibitor are respectively 40%, 40% and 20%.
The inventor of the invention finds that in the asphalt smoke inhibitor, cuprous chloride can consume oxygen in the air on the surface of asphalt, so that the oxidation process of asphalt components can be reduced, di-tert-butyl-p-phenol can be used as a free radical inhibitor to stop the free radical reaction in the asphalt oxidation process, and the addition of an auxiliary oxidant can accelerate the two reactions.
Further, the di-tert-butyl hydroquinone is one or more of 2, 5-di-tert-butyl hydroquinone, 2, 6-di-tert-butyl hydroquinone and 2, 6-di-tert-butyl-4-methylphenol.
Further, the pro-oxidant is one or more of ferric chloride, copper chloride and manganese chloride.
The invention also provides environment-friendly low-smoke asphalt containing the asphalt smoke inhibitor, which is prepared from the following raw materials in parts by weight: 99.2 to 99.8 portions of asphalt and 0.2 to 0.8 portion of asphalt smoke inhibitor.
Further, the asphalt is one or more of petroleum asphalt, polymer modified asphalt and oxidized asphalt binder.
Further, the environment-friendly low-smoke asphalt is prepared from the following raw materials in parts by weight: 99.2 to 99.4 portions of asphalt and 0.6 to 0.8 portion of asphalt smoke inhibitor.
Tests prove that when the content of the inhibitor reaches 0.6 percent or more, the effect of inhibiting the asphalt smoke reaches more than 50 percent.
The invention also provides a preparation method of the environment-friendly low-smoke asphalt, which comprises the following steps:
accurately weighing a proper amount of asphalt, heating to 130-160 ℃, adding a proper amount of asphalt smoke inhibitor under stirring at a rotating speed of 180r/min, sequentially adding cuprous chloride, di-tert-butyl hydroquinone and an auxiliary oxidant, and stirring for 10min to obtain the environment-friendly low-smoke asphalt.
The invention has the following technical effects:
1) the invention is based on the best means for controlling the harm of the asphalt smoke to the environment, namely, the asphalt smoke is controlled at the generation source of the asphalt smoke, and under the condition of researching the release mechanism of the asphalt smoke, the release of the asphalt smoke is obtained by the oxidation reaction of asphalt molecules and oxygen in the air under the hot condition, the mechanism of the oxidation reaction is a free radical mechanism, and the release of the asphalt smoke can be caused in the process. Aiming at the chemical reaction principle of asphalt smoke release, the chemical reaction of asphalt molecules under the action of heat is slowed down by adding cuprous chloride, a free radical inhibitor di-tert-butyl-p-diphenol and an oxidation assisting agent in a targeted manner. Cuprous chloride effectively reduces the reaction between asphalt molecules and oxygen by consuming oxygen in the air, the formation of free radicals in the asphalt oxidation process can be effectively inhibited by the free radical inhibitor, the oxidation reaction is further blocked, the reaction of the cuprous chloride and the free radical inhibitor is enhanced by the addition of the auxiliary oxidant, and the inhibition effect is further improved. One of the advantages of the inhibitor is that it does not alter the properties of the bitumen and even improves the ageing of the bitumen. Secondly, the inhibition effect on the asphalt smoke can reach more than 50 percent, and the inhibition effect is very obvious.
2) The invention successfully prepares an environment-friendly low-smoke asphalt product. The asphalt smoke inhibitor can greatly reduce the generation of asphalt smoke, has no influence on the performance index of asphalt and has low cost.
Detailed Description
The technical solution of the present invention is explained in detail with reference to the following examples.
Example 1
99.2 parts of No. 70 petroleum asphalt, SBS modified asphalt and No. 30 oxidized asphalt are weighed according to the weight and heated to 150 ℃, and 0.8 part of asphalt smoke inhibitor is respectively added under the stirring of the rotating speed of 180 r/min.
The asphalt smoke inhibitor comprises 2, 5-di-tert-butyl hydroquinone, ferric chloride and cuprous chloride which are respectively and independently packaged, wherein the mass percentages of the cuprous chloride, the 2, 5-di-tert-butyl hydroquinone and the ferric chloride are respectively 40%, 40% and 20%.
Adding cuprous chloride, 2, 5-di-tert-butyl hydroquinone and ferric chloride into the asphalt smoke inhibitor in sequence, and stirring for 10min to obtain three kinds of environment-friendly low-smoke asphalt.
The conventional technical indexes of the asphalt are detected, and the detection method refers to JTG E20-2011 test procedures for road engineering asphalt and asphalt mixture
The results are shown in Table 1.
TABLE 1 conventional technical indices of asphalt
The comparative examples in Table 1 are technical indicators for three petroleum asphalts without the addition of inhibitors.
The addition of the inhibitor has no influence on the asphalt performance as can be seen by comparing the main technical indexes before and after the inhibitor is added into three different asphalts.
Example 2
The evaluation test of the asphalt smoke inhibition effect is carried out according to the indoor aging condition simulated in the asphalt mixing process in the technical specification, namely, the asphalt smoke inhibition effect is evaluated by acting for 5 hours at the temperature of 163 ℃. In the test, 100 parts, 99.6 parts, 99.4 parts and 99.2 parts of No. 70 petroleum asphalt are weighed according to the weight and heated to 163 ℃, 0 part, 0.4 part, 0.6 part and 0.8 part of the asphalt smoke inhibitor in the embodiment 1 are respectively added under the stirring of the rotating speed of 180r/min, and the adding method and the adding ratio of the inhibitor are the same as those in the embodiment 1. Under the condition, the release amount of asphalt smoke is collected, and the action time is 5 hours.
The collection of the asphalt smoke aims at the way that solid particles and liquid gas particles are respectively enriched, the liquid and the solid particles are collected by adopting a glass fiber filter cylinder, and the weight method is adopted for calculation and is recorded as heavy components; the gas component is calculated by adopting a solvent absorption method and an ultraviolet spectrophotometry method and is marked as a light component.
The amount of emitted asphalt smoke was collected and calculated for the inhibitor to reduce the amount of emitted asphalt smoke, as shown in table 2:
TABLE 2 Pitch Smoke Release
As can be seen from Table 2, the asphalt containing the inhibitor of the present invention has a significantly reduced asphalt smoke release, and when the inhibitor content reaches 0.6%, the asphalt smoke inhibition effect reaches more than 50%.
In order to analyze the effect of the asphalt smoke suppressant on the performance of the asphalt product, the conventional technical indexes after aging of the asphalt with the asphalt smoke suppressant amounts of 0 part, 0.4 part and 0.8 part were analyzed after the test was completed, and are shown in table 3.
TABLE 3 technical indices before and after asphalt addition of inhibitor
It can be seen from the technical indexes of the asphalt before and after the inhibitor is added in table 3 that each index changes slightly in the aging process of the asphalt with the inhibitor, i.e. after the aging process, the performance of the asphalt with the inhibitor is better than that of the asphalt without the inhibitor, which shows that the inhibitor improves the performance change of the asphalt in the aging process and has the effect of preventing the asphalt from aging while inhibiting the generation of the asphalt.
Example 3
In the test, 100 parts and 99.4 parts of SBS modified asphalt are weighed according to the weight and heated to 163 ℃, 0 part and 0.6 part of the asphalt smoke inhibitor in the embodiment 1 are added respectively under the stirring of the rotating speed of 180r/min, and the adding method and the adding ratio of the inhibitor are the same as those in the embodiment 1. Under the condition, the release amount of asphalt smoke is collected, and the action time is 5 hours.
The release amount of the inhibitor to the asphalt smoke of the SBS modified asphalt is verified and is shown in the table 4.
TABLE 4 fume emission of SBS modified asphalt
As can be seen from table 4, the addition of the inhibitor of example 1 to SBS modified asphalt reduced the asphalt smoke emission by 52.8%.
Example 4
In the test, 100 parts and 99.4 parts of No. 30 oxidized asphalt are weighed according to the weight and heated to 163 ℃, 0 part and 0.6 part of the asphalt smoke inhibitor in the example 1 are added under the stirring of the rotating speed of 180r/min, and the adding method and the adding ratio of the inhibitor are the same as those in the example 1. Under the condition, the release amount of asphalt smoke is collected, and the action time is 5 hours. The smoke emissions of the severe inhibitors on SBS modified asphalt are shown in table 5.
TABLE 530 asphalt Smoke Release of oxidized Pitch
As can be seen from Table 5, the addition of the inhibitor of example 1 to the No. 30 asphalt reduced the asphalt smoke emission by 74.3%.
Example 5
The inhibition effect of different asphalt smoke inhibitor proportions on asphalt smoke is evaluated under the condition of acting for 5 hours at the temperature of 163 ℃. In the test, 99.4 parts of No. 70 petroleum asphalt is weighed according to weight and heated to 163 ℃, and 0.6 part of inhibitor 1, inhibitor 2 and inhibitor 3 are added respectively. Wherein the inhibitor 1 is cuprous chloride; the inhibitor 2 is 2, 5-di-tert-butylhydroquinone; inhibitor 3 is the asphalt smoke inhibitor of example 1, and the asphalt smoke is collected by the same method as in example 2, and the results are shown in table 6.
TABLE 6 Release amount of asphalt Smoke under different compounding ratios of inhibitors
As can be seen from the data in Table 6, the release amount of the asphalt smoke is the lowest after the inhibitor 3 is added, the asphalt smoke inhibition effect is the best, and the asphalt smoke inhibition effect is far better than that of the single use of cuprous chloride or di-tert-butylhydroquinone.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and is not intended to limit the practice of the invention to these embodiments. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. An asphalt smoke inhibitor, characterized in that: the asphalt smoke inhibitor is composed of di-tert-butyl hydroquinone, an oxidation promoter and cuprous chloride which are respectively and independently packaged, wherein the mass percentages of the cuprous chloride, the di-tert-butyl hydroquinone and the oxidation promoter in the asphalt smoke inhibitor are respectively 40%, 40% and 20%.
2. The asphalt smoke suppressant according to claim 1, characterized in that: the di-tert-butylhydroquinone is one or more of 2, 5-di-tert-butylhydroquinone, 2, 6-di-tert-butylhydroquinone and 2, 6-di-tert-butyl-4-methylphenol.
3. The asphalt smoke suppressant according to claim 1, characterized in that: the pro-oxidant is one or more of ferric chloride, copper chloride and manganese chloride.
4. An environmentally friendly low smoke asphalt containing the asphalt smoke suppressant according to any one of claims 1 to 3, wherein: the composite material is prepared from the following raw materials in parts by weight: 99.2 to 99.8 portions of asphalt and 0.2 to 0.8 portion of asphalt smoke inhibitor.
5. The environment-friendly low-smoke asphalt as claimed in claim 4, characterized in that: the asphalt is one or more of petroleum asphalt, polymer modified asphalt and oxidized asphalt binder.
6. The environment-friendly low-smoke asphalt as claimed in claim 4, characterized in that: the environment-friendly low-smoke asphalt is prepared from the following raw materials in parts by weight: 99.2 to 99.4 portions of asphalt and 0.6 to 0.8 portion of asphalt smoke inhibitor.
7. The method for preparing environment-friendly low-smoke asphalt according to claim 4, characterized by comprising the following steps:
accurately weighing a proper amount of asphalt, heating to 130-160 ℃, adding a proper amount of asphalt smoke inhibitor under stirring at a rotating speed of 180r/min, sequentially adding cuprous chloride, di-tert-butyl hydroquinone and an auxiliary oxidant, and stirring for 10min to obtain the environment-friendly low-smoke asphalt.
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| CN105733282A (en) * | 2016-03-29 | 2016-07-06 | 苏州蔻美新材料有限公司 | Smoke-inhibition modified epoxy resin asphalt and preparation method thereof |
| US20200024374A1 (en) * | 2017-03-31 | 2020-01-23 | Jenkem Technology Co., Ltd. (Beijing) | Composition of polyethylene glycol maleimide derivative and polymerization inhibitor |
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