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Method for preparing environment-friendly waterproof plant asphalt by using plant raw materials

A technology of plant asphalt and plant raw materials, which is applied in the direction of processing tar asphalt/petroleum asphalt/natural asphalt by chemical methods, which can solve the problems of environmental pollution, high cost, and low utilization rate of waste asphalt, and achieve broad application prospects and high equipment efficiency. The effect of low requirements and low raw material cost

Inactive Publication Date: 2012-10-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, as a mature substitute material for asphalt—cement, although it can play a certain role in urban roads, cement is not suitable for use on expressways. It is difficult to completely replace the use of asphalt
[0008] In addition, petrochemical asphalt is non-degradable, and the utilization rate of waste asphalt produced by road renovation is very low and difficult to handle. During use, asphalt fumes also contain a large amount of carcinogens, polluting the environment
At home and abroad, many experts are committed to the "petrochemical asphalt warm mixing technology" to control the processing temperature within 130 degrees Celsius through solvents or surfactants to avoid the generation of green smoke. However, the high cost of this technology is still difficult to promote and use on a large scale

Method used

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  • Method for preparing environment-friendly waterproof plant asphalt by using plant raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Import 300 kilograms of 808 plant asphalt at 230-240 degrees from the separation tower into a 1 cubic esterification kettle commonly used in the polyester industry, add 30 kilograms of phthalic anhydride, stir in the temperature range of 190-210 degrees, and carry out esterification Cyclization reaction; the initial pressure of the reaction is zero. After 34 minutes, the pressure gauge began to display the pressure; at about 90 minutes, on the recorded pressure-time curve chart, the maximum pressure change rate was displayed, and the pressure was 0.28MPa (2.8 kg); at 200 minutes, the pressure was stable at 0.35MPa; After 220 minutes, slowly open the valve of the esterification outlet pipe of the esterification kettle, put the outlet pipe into the condensate pool, and release the water to relieve the pressure. After the pressure is relieved, the brown-black 828-1 vegetable asphalt with a temperature of 215 degrees is obtained in the kettle.

[0038] Sampling measurement...

Embodiment 2

[0041] Import 300 kg of 808 vegetable asphalt at 230-240 ° C from the fractionating tower into a 1 cubic esterification kettle commonly used in the polyester industry, add 45 kg of phthalic anhydride, stir in the temperature range of 190-210 ° C, and carry out esterification Cyclization reaction; the initial pressure of the reaction is zero. After 30 minutes, the pressure gauge began to display the pressure; at about 100 minutes, it showed the maximum pressure change rate, and the pressure at this time was 0.29MPa (2.9 kg); at 210 minutes, the pressure was stable at 0.37MPa; after 240 minutes, release the water to relieve the pressure . After the pressure is released, a 217°C, dark brown-black 828-2 plant pitch is obtained in the kettle.

[0042] Sampling measurement shows that 828-2 plant asphalt is also insoluble in water; compare the 828-2 plant asphalt sample at 200 degrees with the 90# petroleum asphalt at 200 degrees, the former has no obvious smoke and no serious odor ...

Embodiment 3

[0045] With 300 kilograms of plant asphalt obtained in Example 1 828-1 at 213 ° C, import in a 10-liter stirring tank, add 1350 kilograms of 90# petroleum asphalt, and 750 kilograms of 10# petroleum asphalt, 200 kilograms of machine oil, poly 100 kg of propylene, 200 kg of SBS, 300 kg of waste rubber powder, and 2,000 kg of calcium carbonate; stir for 24 hours in the temperature range of 200-220°C, and discharge. The above-mentioned about 5 tons of materials are used to prepare waterproof asphalt coils on the production line, and the same process is used to prepare waterproof asphalt coils. The low temperature resistance of the finished product was tested, compared with the original process without 828-1 plant asphalt, the low temperature resistance changed from -15°C of the original control sample to -20°C, which indicated that the plant pitch of 828-1 In addition to being used as a substitute for petroleum asphalt, asphalt can also improve the low temperature resistance of a...

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Abstract

The invention relates to a method for preparing environment-friendly waterproof plant asphalt by using plant raw materials, which comprises the following steps: adding phthalic anhydride into a fractionated substrate, wherein the weight of the phthalic anhydride is 10-15% of the weight of the fractionated substrate; stirring at 190-210 DEG C under an airtight condition and performing esterification cyclization reaction for 3-4 hours; and when vapor pressure of water generated from the reaction no longer increases, stopping reaction and relieving the pressure, thereby obtaining the environment-friendly waterproof plant asphalt. According to the method provided by the invention, the operation is simple, the cost of raw materials is low, the demand on equipment is lower, the environment is protected and the method is suitable for large-scale production. According to the method provided by the invention, the problem that a large quantity of fractionated substrates are accumulated in the large-scale industrial production of binary chemical alcohol is solved; the product prepared according to the method contains no carcinogenic substance and can contain partial petroleum asphalt, thereby being environment-friendly and safe and obtaining higher economic benefit; and the application prospect is wide.

Description

technical field [0001] The invention belongs to the field of asphalt preparation, and in particular relates to a method for preparing environmentally friendly and waterproof plant asphalt by using plant raw materials. Background technique [0002] In the post-petroleum era when biological resources are used to replace petroleum, only the large-scale industrial development of "bioenergy" such as biodiesel and bioethanol (monohydric alcohol) has been completed in the world. Glycols are one of the raw materials for chemical products (polyester) that consume the largest petroleum resources besides energy. Invention patent ZL 2007 1 0038146.5 "a preparation method of corn raw material multi-component diol", and invention patent ZL 2007 1 0038144.6 "a preparation method of PDT copolyester fiber", and invention patent application: 2007 1 00381408 "Method for preparing unsaturated resin from resin diol produced from renewable biological raw materials", contributed to the first larg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10C3/02
Inventor 吴嘉麟陈建文徐周文
Owner DONGHUA UNIV
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