阅读说明：本技术 一种石油系浸渍沥青及其制备方法 (Petroleum-series impregnating asphalt and preparation method thereof ) 是由 邓文广 武光照 张东春 王涵 张斌 郭娜 商希红 于 2019-08-29 设计创作，主要内容包括：本发明公开了一种石油系浸渍沥青及其制备方法。所述制备方法包括如下步骤：将净化后的减三线糠醛抽出油或减四线糠醛抽出油与净化后的催化裂化油浆按照一定比例混合,进行热聚合反应,所得产物经蒸馏去除轻组分,即得到浸渍沥青。本发明方法制备的浸渍沥青,具有如下特性：软化点不小于80℃；哇琳不溶物小于1％；结焦值不小于47％；甲苯不溶物不小于10％；灰分小于0.1％。本发明方法采用的原料易得,价格低廉,能确保生产出来的高品质浸渍沥青的产品成本低,实现高品质浸渍沥青规模化生产和可持续发展。(The invention discloses petroleum-series impregnated asphalt and a preparation method thereof. The preparation method comprises the following steps: mixing the purified reduced trilinear furfural extract oil or the reduced trilinear furfural extract oil with the purified catalytic cracking slurry oil according to a certain proportion, carrying out thermal polymerization reaction, and distilling the obtained product to remove light components to obtain the impregnated asphalt. The impregnated asphalt prepared by the method has the following characteristics: the softening point is not less than 80 ℃; less than 1% of Galin insoluble substances; the coking value is not less than 47 percent; toluene insoluble matter not less than 10%; the ash content is less than 0.1%. The method has the advantages of easily obtained raw materials and low price, can ensure that the produced high-quality impregnated asphalt has low product cost, and realizes the large-scale production and sustainable development of the high-quality impregnated asphalt.)

1. A preparation method of impregnated asphalt comprises the following steps:

And mixing the purified reduced trilinear furfural extract oil or the purified reduced trilinear furfural extract oil with the purified catalytic cracking slurry oil, carrying out thermal polymerization reaction, and distilling the obtained product to remove light components to obtain the impregnated asphalt.

2. The method of claim 1, wherein: purifying the reduced trilinear furfural extract oil or the reduced trilinear furfural extract oil according to the following method:

Distilling the reduced linear furfural extract oil or the reduced linear furfural extract oil, and cutting the distillation range of 350-480 ℃.

3. the production method according to claim 1 or 2, characterized in that: the catalytic cracking slurry oil is purified according to the following method:

Solvent deasphalting the catalytically cracked oil slurry with solvent, distilling and cutting to obtain distillation range of 350-480 deg.c.

4. the production method according to claim 3, characterized in that: the solvent adopted for solvent deasphalting is butane or a mixed solvent of butane and pentane.

5. The production method according to any one of claims 1 to 4, characterized in that: the mass ratio of the purified catalytic cracking slurry oil to the purified reduced trilinear furfural extract oil or the purified reduced trilinear furfural extract oil is 1:1 to 10.

6. The production method according to any one of claims 1 to 5, characterized in that: the thermal polymerization conditions were as follows:

under the protection of nitrogen or superheated steam;

The temperature is 350-560 ℃;

Absolute pressure is 0.3 MPa-5.5 MPa;

The time is 1-10 hours.

7. An impregnated asphalt prepared by the process of any of claims 1-6.

8. Impregnated pitch according to claim 7, characterized in that: the impregnating pitch has the following characteristics:

the softening point is not less than 80 ℃; less than 1% of Galin insoluble substances; the coking value is not less than 47 percent; toluene insoluble matter not less than 10%; the ash content is less than 0.1%.

Technical Field

The invention relates to petroleum-based impregnated asphalt and a preparation method thereof, belonging to the technical field of petrochemical processing.

Background

At present, the impregnated asphalt is widely applied to industries such as special graphite products, lithium battery industry, electronic industry, new materials and the like. In the preparation process of high-performance carbon materials, such as C/C composite materials, high-density high-strength carbon blocks and the like, the function of the carbon materials is not replaceable. It is a densification and strengthening agent for high-quality carbon material and carbon product, and is an important basic industrial raw material. The high-quality impregnating asphalt is widely used in the civil and national defense fields of metallurgy, electronics, machinery, aerospace, new energy, nuclear industry, medicine, military industry and the like. For example: the method is a basic raw material for producing high-quality asphalt-based carbon fibers, and has the advantages of low cost and good quality; it is a necessary densified raw material for producing the ultrahigh-power graphite electrode; it is a basic raw material for producing high-quality needle coke; the coating material is a raw material of the lithium battery negative electrode material with improved performance; it is used as the impregnating material and binding material of large-size anisotropic graphite material necessary for brake block of airplane and nuclear reactor, and its application is very extensive and important.

The quality of the impregnated asphalt directly affects the production cost and material performance of high-performance carbon materials, but because of raw materials and technical reasons, coal asphalt is mostly used as the impregnated asphalt by carbon enterprises in China, the impregnated asphalt special for carbon materials is not widely adopted at present, particularly the impregnated asphalt for high-power and ultrahigh-power electrodes is still in the research and development stage, and foreign high-quality products limit export to China. At present, domestic impregnated asphalt cannot meet the use requirements, and the upgrading and updating of products in the graphite industry, the metallurgical industry, the mechanical industry, the nuclear industry, the military industry and other industries are seriously hindered, so that a method for producing high-quality impregnated asphalt in a large scale is needed.

Disclosure of Invention

The invention aims to provide petroleum-based impregnated asphalt and a preparation method thereof, and the method can obtain high-quality impregnated asphalt products with stable quality and good impregnation effect, and has the advantages of easily available raw materials and low price.

The preparation method of the impregnated asphalt provided by the invention comprises the following steps:

Mixing the purified reduced trilinear furfural extract oil or the reduced trilinear furfural extract oil with the purified catalytic cracking slurry oil according to a certain proportion, carrying out thermal polymerization reaction, and distilling the obtained product to remove light components to obtain the impregnated asphalt.

In the invention, the reduced three-line furfural extract oil or the reduced four-line furfural extract oil refers to high-aromatic-hydrocarbon extract oil obtained by treating reduced three-line distillate oil or reduced four-line distillate oil by a furfural refining device in the production process of lubricating oil.

in the invention, the catalytic cracking slurry oil refers to heavy oil from the bottom layer of a catalytic cracking unit.

in the above preparation method, the reduced trilinear furfural extract oil or the reduced trilinear furfural extract oil is purified according to the following method:

distilling the reduced linear furfural extract oil or the reduced linear furfural extract oil, and cutting the distillation range of 350-480 ℃.

In the preparation method, the catalytic cracking slurry oil is purified according to the following method:

solvent deasphalting the catalytically cracked oil slurry to eliminate catalyst powder, distilling at 350-480 deg.c.

In the preparation method, the solvent used for solvent deasphalting is butane or a mixed solvent of butane and pentane.

In the above preparation method, the mass ratio of the purified catalytic cracking slurry oil to the purified reduced trilinear furfural extract oil or the purified reduced trilinear furfural extract oil may be 1: 1-1: 10, preferably 1: 1.

In the above preparation method, the conditions of the thermal polymerization are as follows:

under the protection of nitrogen or superheated steam;

the temperature is 350-560 ℃;

absolute pressure is 0.3 MPa-5.5 MPa;

The time is 1-10 hours.

the impregnated asphalt prepared by the method has the following characteristics:

The softening point is not less than 80 ℃; less than 1% of Galin insoluble substances; the coking value is not less than 47 percent; toluene insoluble matter not less than 10%; the ash content is less than 0.1%.

the method has the advantages of easily obtained raw materials and low price, can ensure that the produced high-quality impregnated asphalt has low product cost, and realizes the large-scale production and sustainable development of the high-quality impregnated asphalt.

Detailed Description

The experimental procedures used in the following examples are all conventional procedures unless otherwise specified.

Materials, reagents and the like used in the following examples are commercially available unless otherwise specified.

The three-way furfural reducing extract oil used in the following examples is a 36-1 crude oil three-way furfural reducing refined extract oil in Suizhong, and has the following characteristics: the density at 20 ℃ is 1.033g/cm3, the kinematic viscosity at 100 ℃ is 36.75mm2/s, and the total aromatic hydrocarbon is 78.7%.

the crude oil minus quadri-linear furfural extract oil used in the following examples is Suizhong 36-1 crude oil minus quadri-linear furfural refined extract oil, and has the following characteristics: the density at 20 ℃ is 1.045g/cm3, the kinematic viscosity at 100 ℃ is 55.74mm2/s, and the total aromatic hydrocarbon is 79.2 percent.

The catalytic cracking slurry oil used in the following examples had the following properties: the distillation range is 300-550 ℃, the density at 20 ℃ is 1.113g/cm3, and the total aromatic hydrocarbon is 84.68%.

The reduced trilinear furfural extract oil and the reduced trilinear furfural extract oil used in the following examples were purified according to the following methods: distilling by a distilling device, and cutting into a distillation range of 350-480 ℃.

The catalytic cracking slurry used in the following examples was purified as follows: the catalytic slurry oil is subjected to solid removal treatment by adopting a solvent deasphalting device (the solvent is butane), catalyst powder is removed, and then the catalytic slurry oil is cut into a distillation range of 350-480 ℃ by a distillation device.