Desulfurization refining method of sulfate turpentine with ultra-low sulfur content

Abstract

The invention provides a desulfurization refining method of sulfate turpentine with the ultra-low sulfur content, and relates to sulfate turpentine. The desulfurization refining method comprises the steps that the sulfate turpentine is rectified and separated through a vacuum rectifying tower to obtain pinene; the pinene is hit into a fixed bed filled with shell activated carbon to be soaked, thenthe pinene is replaced repeatedly and cyclically in the fixed bed through a circulating pump, a pinene material is released from the side line of the circulating pump, ultra-low-sulfur pinene is obtained, the fixed bed is purged through high-temperature water vapor and nitrogen, thus the activated carbon is regenerated, and the desulfurization-refined sulfate turpentine with the ultra-low sulfurcontent is obtained. The small granular shell activated carbon is adopted as an adsorbing agent, the activated carbon has a developed gas structure and is high in absorbing ability, large in strength,stable in chemical property and durable, sulphur residues in the sulfate turpentine are effectively adsorbed, material diffusion is accelerated through the circulating pump, thus materials are distributed evenly, one the one hand, the adsorbing effect of the activated carbon is enhanced, on the other hand, physical damage of stirring on the activated carbon is avoided, operation is easy, energy consumption is small, and industrial feasibility is achieved.

Description

technical field [0001] The invention relates to sulfate turpentine, in particular to a method for desulfurizing and refining sulfate turpentine with ultra-low sulfur content. Background technique [0002] Kraft turpentine is a by-product of pulp produced from pine wood through the kraft process. Its output increases with the demand for pulp. The main components are α-pinene, β-pinene and Δ 3 -carene. [0003] Due to the high cost of artificial collection of natural gum turpentine, its output will decline in the long run. [0004] Replacing natural gum turpentine with sulfate turpentine has high economic value, but sulfate turpentine contains a large amount of sulfur-containing organic matter, has a foul smell, and is dark in color. It needs to be desulfurized and refined to a certain specification before it can replace gum turpentine. [0005] There are many desulfurization and refining methods for sulfate turpentine, such as rectification, alkali washing, adsorption, oxid...

AI Technical Summary

Problems solved by technology

[0005] There are many desulfurization and refining methods for sulfate turpentine, such as rectification, alkali washing, adsorption, oxidation, etc., but it is difficult to obtain pinene products with ultra-low sulfur content