Refined method for crude sulfate turpentine

Abstract

The invention relates to a refined method for crude sulfate turpentine. The method for the crude sulfate turpentine comprises the following steps that (1),CST conducted heat transfer enters a flashing tower to conduct flash separation, materials flowing from the bottom of the flashing tower are collected and sent to the middle portion of a vacuum rectifying column to be rectified and separated; (2), after materials flowing from the tower roof of the vacuum rectifying column are heat transferred, the materials enter an oxidation absorption tower to be oxidized and adsorbed; (3), materials after being oxidized and adsorbed enter an alkali wash reaction still and are alkali washed by alkaline solutions; (4), materials after being alkali washed enter a phase splitter, an upper layer oil phase acquired from layers being separated enters ithe vacuum rectifying column with a side line discharging to be separated, a Alpha-pinene product is acquired from an upper side line and a Beta -pinene product is acquired from a lower side line. The refined method for the crude sulfate turpentine applies a method which combines the processes of rectification, adsorption and chemical oxidation to acquire a pinene product with super low sulfur. The refined method for the crude sulfate turpentine is simple, low in energy consumption and production cost, and high in industrial reliability.

Description

field of invention

[0001] The invention relates to turpentine, in particular to the desulfurization and purification of crude sulfate turpentine, and more specifically to a method for refining an ultra-low sulfur pinene product of crude sulfate turpentine. Background technique

[0002] Turpentine is a biologically active natural product, and its main components are α-pinene and β-pinene. It has been widely used in product development in the fields of medicine, pesticide, resin, information industry, and communication.

[0003] According to different sources, turpentine can be divided into four types: gum turpentine, crude sulfate turpentine (hereinafter referred to as CST), wood turpentine, and dry distillation turpentine. China is mainly based on gum turpentine. Due to the high cost of extracting gum turpentine, CST with lower production cost is favored by more and more producers and consumers.

[0004] CST is a by-product of producing pulp through kraft process with pine...

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