Preparation method for high-softening point asphalt

Abstract

The invention discloses a preparation method for high-softening point asphalt. The method includes: respectively spraying molten state asphalt and an oxidant into an oxidation reactor at the same time to undergo oxidation reaction, thus obtaining the high-softening point asphalt. Specifically, the oxidant is nanoscale potassium permanganate and / or nanoscale potassium dichromate. The asphalt and the oxidant are respectively sprayed into the oxidation reactor in the fog state at the same time by a high pressure pump and compressed air to undergo mixing. The method provided by the invention has the advantages of less oxidant consumption, low oxidation temperature, high reaction efficiency, convenient operation, environment-friendly reaction process, and low energy consumption.

Description

technical field

[0001] The invention relates to a preparation method of high softening point asphalt, in particular to a high-efficiency oxidation method for preparing high softening point asphalt by using an oxidant. Background technique

[0002] High softening point asphalt refers to asphalt with a softening point above 100°C, especially above 120°C. High softening point asphalt is widely used because of its excellent high temperature resistance. If it is used as a roof covering for building a house, it will not become very soft or even runny even in the hot summer. It can also be used in drilling operations in deep oil and gas fields. As an important part of drilling fluid, it can play a role in plugging, preventing collapse, stabilizing the well wall and reducing fluid loss under high temperature conditions. In addition, it can also be used as a modification additive for polymer materials, etc.

[0003] The production process of high softening point asphalt mainly ado...