JP2794039B2 - Manufacturing method of blown asphalt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the use of blown asphalt by heating and melting, particularly when producing asphalt roofing and when bonding the roofing to a building or the like, the amount of generated smoke and odor is reduced. The present invention relates to a method for producing significantly less blown asphalt and catalytic blown asphalt.

[0002]

2. Description of the Related Art Conventionally, blown asphalt is prepared by mixing a distillate obtained from a vacuum distillation unit and an extraction oil obtained from a furfural solvent refining unit for lubricating oil with a vacuum distillation residue of crude oil or straight asphalt. Air is blown at a temperature of 200 to 300 ° C. using a blown asphalt manufacturing apparatus
Quality products that meet the requirements of 2207 “Petroleum Asphalt” are manufactured.

[0003] Blown asphalt has low water permeability,
Excellent in adhesiveness, electrical insulation, etc. and relatively inexpensive, so it has been used for waterproofing adhesives, paints, steel pipe coating layers, tarpaulin paper, dust, etc. It is used for processing and electrical insulation. Particularly for roofing materials and waterproofing construction of buildings, it is desirable to use asphalt having a high softening point and low temperature sensitivity.

[0004] JIS K2207 "Petroleum asphalt"
Then, asphalt for waterproofing construction was changed to 1
The blown asphalt corresponding to these is classified into four types, and the magnitude of the temperature sensitivity is adjusted depending on the method of production. As examples of the low temperature sensitivity of this blown asphalt, three types and four types of standard products for waterproofing work can be raised, but by reducing the temperature sensitivity,
At the same penetration level, the softening point increases, and the viscosity during heating and melting also increases accordingly.

[0005] Generally, the viscosity of asphalt used for waterproofing work is often in the range of 50 to 100 cSt (centistokes), but in order to obtain this viscosity range, blown asphalt having a high softening point requires: In reality, heating to about 280 ° C. is often required.

[0006]

The blown asphalt produced at a petroleum refining factory is transported as it is to a roofing factory or the like in a heated and melted state to be processed into asphalt roofing or the like. , Cooled and melted again when used. When secondary processing of blown asphalt, it is necessary to heat it to a viscosity suitable for processing, but as the temperature rises, relatively light components contained in asphalt evaporate and are perceived as smoke and smell Will be done.

Although there is no problem in the case where a facility capable of absorbing and removing such light components is provided, for example, when performing asphalt waterproofing renovation work on a rooftop of an apartment or the like, an asphalt roofing is required for bonding. Blow asphalt is heated to about 280 ° C. In such a situation, the amount of smoke and odor increases, and there are many cases that bother residents living in apartments.
With the overcrowding of urban residents, measures are strongly required.

[0008]

The present inventor has been conducting research on the production of blown asphalt for many years.
Even though it has a certain degree of penetration and softening point, it has been found that when melted at a high temperature, its viscosity varies considerably depending on the material source.

Focusing on this point, as a result of thoroughly examining the high-temperature viscosity of blown asphalt from various material sources, it has been found that solvent refined oil of solvent deasphalted oil of reduced pressure distillation residue of atmospheric distillation residue of crude oil After further hydrorefining, blown asphalt and catalyst blown asphalt produced from a raw material containing 5 to 40% by volume of slack wax obtained by a solvent dewaxing device show particularly low viscosity at high temperature,
In addition, they have found that they have the necessary other properties, and have completed the present invention. That is, when heating blown asphalt composed of a hydrocarbon compound having a complicated composition, the amount of generated smoke and odor is mainly determined by the heating temperature, and is not significantly related to the type of hydrocarbon constituting the composition. Was.

On the other hand, the heating temperature at the time of secondary processing of blown asphalt is determined by the viscosity of asphalt. Therefore, asphalt having a lower viscosity at a higher temperature can be used at a lower temperature, and the amount of smoke and odor generated as a result. Less,
It also saves energy.

The slack wax used in the present invention is obtained by subjecting a vacuum distillation residue of crude oil to a deasphalting, solvent refining, hydrorefining and solvent dewaxing apparatus. Among these apparatuses, for the solvent deasphalting apparatus, propane, butane, etc. are used as a solvent, and any of them may be used.For the solvent refining apparatus, there are a furfural method, a phenol method, and the like. Good. There are several types of hydrorefining equipment, such as hydrofining, gulf finishing, and ferrofining.Hydrodesulfurization, denitrification, and It is subject to reactions such as demetallization, and any of them can be used effectively.

The slack wax used in the present invention is effective in lowering the viscosity of the product blown asphalt in a high temperature range as the blending amount in the raw material increases, but when it exceeds 40% by volume, the blown asphalt increases. As other properties required may be impaired. On the other hand, if it is less than 5% by volume, the effect is small. If the amount of the slack wax in the raw material is 5 to 40% by volume, the compounding agents to be combined are reduced-pressure distillation residual oil and reduced-pressure distilled oil used for ordinary blown asphalt, and lubricating oil. Oil extracted from furfural solvent refining equipment for oil, solvent deasphalted oil of vacuum residual oil, etc. can be used without any problem.

[0013] As a catalyst for the catalyst blowing, ferric chloride, phosphorus pentoxide, polyphosphoric acid and the like can be used, and any of them can be used. Among them, polyphosphoric acid is particularly effective. The blowing device when practicing the present invention is:
There is no need for any special design, and a conventionally used device can be used as it is. Further, it is not necessary to change the reaction temperature and the air blowing amount.

[0014]

EXAMPLES Examples will be shown below, but the present invention is not limited to these examples. Table 1 shows the properties of the material sources used in Example 7 and Comparative Example 5, and Tables 2 (Example) and Table 4 (Comparative Example) show the mixing ratios of the raw materials obtained by mixing them. The properties of the obtained blown asphalt are shown in Table 3 (Example) and Table 5 (Comparative Example). Among the test methods used for evaluation, the penetration, softening point, Frass embrittlement point, flash point, ethane trichloride soluble matter, dripping length, heating stability and viscosity are all JIS K2207 “Petroleum asphalt”. Followed.

The temperature for measuring the high temperature viscosity is 180 ° C. and 200 ° C.
° C, and a BS / IP viscometer was used in each case. 100cSt
The equivalent temperature and the equivalent temperature of 50 cSt were determined from the viscosity-temperature relationship chart by an extrapolation method. The odor concentration indication value is a portable odor sensor XP-329 manufactured by Shin Cosmos Electric Co., Ltd.
The sample was measured by a mold. The laboratory atmosphere was set to 200 as a base adjustment, and the odor coming out of the sample placed on the heating plate was sensed for 1 minute, and the maximum value was displayed.

[0016]

[Table 1]

[0017]

[Table 2]

[0018]

[Table 3]

[0019]

[Table 4]

[0020]

[Table 5]

(Example 1) 7% by volume of slack wax obtained from the solvent dewaxing apparatus of the present invention and vacuum distillation residue 93
% By volume blown asphalt obtained by blowing a raw material consisting of
The viscosity is very low above 80 ° C.
The temperature at which the viscosity reaches 00 cSt is also low, and the indicated value of the odor concentration at that time is small, and the product emits less smoke.

(Example 2) Waterproofing work specified in JIS K2207 "petroleum asphalt" obtained by adding 0.5% by mass of polyphosphoric acid to the same raw material as in Example 1 and blowing by a conventional method. Although it is a type 1 asphalt standard product, its viscosity at 180 ° C or higher is extremely low.
Therefore, the temperature at which the viscosity reaches 50 to 100 cSt is also low, and the odor concentration indication value at that time is small, so that the product emits less smoke.

(Example 3) 7% by volume of slack wax obtained by the solvent dewaxing apparatus of the present invention and a vacuum distillation residue 7
JIS K2 obtained by blowing a raw material consisting of 3% by volume and 20% by volume of a vacuum distillation distillate by a conventional method.
207 “Waterproofing work 1” specified in “Petroleum asphalt”
It is a product that has passed the grade of asphalt and has a very low viscosity at 180 ° C. or higher, and thus has a low temperature at which the viscosity reaches 50 to 100 cSt.

(Example 4) 20% by volume of slack wax obtained from the solvent dewaxing apparatus of the present invention and a vacuum distillation residue 7
JIS K2207 obtained by blowing a raw material comprising 0% by volume and 10% by volume of deasphalted oil by a conventional method.
A product that has passed two types of asphalt standards for waterproofing work stipulated in "petroleum asphalt". Its viscosity at 180 ° C or higher is fairly low, so the temperature at which the viscosity reaches 50 to 100 cSt is also low. Products with few.

Example 5 20% by volume of slack wax obtained from the solvent dewaxing apparatus of the present invention and a vacuum distillation residue 8
0.5% by mass of polyphosphoric acid added to 0% by volume and blown by a conventional method. The product has passed the three asphalt standards for waterproofing work specified in JIS K2207 "Petroleum asphalt". Comparative Example 1 obtained
The viscosity at 180 ° C. or higher is lower than that of
The temperature at which the viscosity reaches 00 cSt is as low as about 30 ° C, the odor concentration indicated value is also small, and the product emits less smoke.

(Example 6) 38% by volume of slack wax obtained from the solvent dewaxing apparatus of the present invention and vacuum distillation residue 6
This product is a 3 grade asphalt standard for waterproofing work specified in JIS K2207 "Petroleum asphalt" obtained by blowing a raw material consisting of 2% by volume by a conventional method. Is low and therefore 5
The temperature at which the viscosity becomes 0 to 100 cSt is as low as about 30 ° C., the odor concentration indicated value is also small, and the product emits less smoke.

(Example 7) JIS K2207 "Petroleum asphalt" obtained by adding 0.5% by mass of polyphosphoric acid to the same raw material as in Example 6 and blowing by a conventional method.
Although it is a product that has passed the four asphalt standards for waterproofing work specified in, the viscosity at 180 ° C or higher is relatively low, the odor concentration indication value is small, and the smoke is low.

(Comparative Example 1) J manufactured by a conventional material source
Three kinds of asphalt standard for waterproofing work specified in IS K2207 "Petroleum asphalt". The viscosity at 180 ℃ and 200 ℃ is 4000cSt and 1200cS respectively.
The temperature at which the temperature reaches 50 cSt and 100 cSt is as high as 280 ° C. and 260 ° C., respectively, and the odor concentration indicated values are also 800 and 640, respectively.

Comparative Example 2 JIS obtained by blowing a raw material in which 3% of 40% by volume of a vacuum distillation distillate blended as a conventional material source was replaced with the slack wax of the present invention by a conventional method. K2207 “petroleum asphalt” is a three-grade asphalt standard product for waterproofing work, and has a viscosity of 3600 at 180 ° C and 200 ° C, respectively.
cSt and 1100 cSt, 50 cSt and 100 cSt
Are 280 ° C. and 255 ° C., respectively, and the odor concentration indicated values are 630 and 480, respectively.

(Comparative Example 3) JIS K2207 "Petroleum asphalt" obtained by adding 0.5% by mass of polyphosphoric acid to the same raw material as in Comparative Example 2 and blowing by a conventional method.
4 kinds of asphalt standard products for waterproofing work specified in JIS, 180 ℃ and 200 ℃ viscosity 5000cS each
t and 1700 cSt, the temperatures at which 50 cSt and 100 cSt are reached are as high as 310 ° C. and 280 ° C., respectively, and the odor concentration indicated values are also 800 and 630, respectively.

Comparative Example 4 Slack wax 4 of the present invention
Blown asphalt obtained by blowing a raw material consisting of 5% by volume and 55% by volume of a vacuum distillation bottom oil by a conventional method. The indicated odor concentration at a temperature at which the viscosity becomes 50 cSt and 100 cSt is as high as 480 and 380, respectively. In addition, despite having a penetration and softening point within the standard asphalt standard area for waterproofing work specified in JIS K2207 "Petroleum Asphalt", the Frass embrittlement point is as high as -11 ° C, and as a type 3 asphalt. Required performance is impaired.

(Comparative Example 5) A blown asphalt obtained by adding 0.5% by mass of polyphosphoric acid to the same raw material as in Comparative Example 4 and blowing in a conventional manner, but having a viscosity of 50
In addition to the high odor concentration readings of 530 and 410 at temperatures of cSt and 100 cSt, JIS K2207
Despite having the penetration and softening point of the four standard areas for waterproofing work stipulated in "Petroleum asphalt," the Frass embrittlement point is as high as -13 ° C, and the three types as well as the four types Even the performance that should have is impaired.

[0033]

The blown asphalt of the present invention has a lower melt viscosity than the conventional product, and therefore has a lower melt viscosity than the conventional product.
Since the work can be performed at a temperature as low as about 0 ° C., the generation of smoke and odor during the work is greatly reduced, and the inconvenience to nearby residents can be significantly reduced. In addition, since the heating temperature can be low, there is a special effect that energy saving can be achieved.

Claims (1)

(57) [Claims] 1. A slack wax obtained by further hydrotreating a solvent refined oil of a solvent deasphalted oil of a vacuum distillation residue of a crude oil at atmospheric distillation residue and then subjecting it to a solvent dewaxing apparatus.
A method for producing blown asphalt and catalytic blown asphalt, characterized by using a raw material containing volume%.