CN104559793A - High-vacuum continuous distillation production method of light-colored rosin - Google Patents

Abstract

The invention discloses a high-vacuum continuous distillation production method of light-colored rosin. The method comprises the following steps of enabling liquid rosin to continuously enter a high-vacuum distillation system, keeping the degree of vacuum of the distillation system to be 6mm-8mm Hg, heating to 150 DEG C-180 DEG C, gasifying all heavy oil and condensed aromatic hydrocarbon contained in rosin and cooling to enter a storage tank, heating all heavy oil and condensed aromatic hydrocarbon removal rosin to 220 DEG C-250 DEG C so that the rosin is converted from a liquid state to a gaseous state and cooling to 150 DEG C-180 DEG C to enter the storage tank to obtain the light-colored rosin. By the method, light-colored rosin can be continuously produced so that the production efficiency of the light-colored rosin is improved and furthermore, the prepared product, namely, light-colored rosin is high in acid value and softening point and stable in quality; and in addition, no rosin stabilizer needs to be added during the production process and thus the production cost is decreased.

Description

Pale rosin high vacuum continuous still battery production method

Technical field

The present invention relates to rosin processing technique field, particularly relate to a kind of pale rosin high vacuum continuous still battery production method.

Background technology

Pale rosin has lighter color, softening temperature high, and the industrial sectors such as application and paint, ink, synthetic resins, tackiness agent, electronics, chemical industry, react with phenolic, alcohols and can be made into light resol and various rosin esters.

Publication number be CN 1730584A patent discloses the tasteless rosin of a kind of light color and production method thereof, the method is: rosin loads in still kettle by (a), be warmed up to 250 DEG C ~ 265 DEG C, keep vacuum tightness to be under 5mm ~ 8mm water column conditions, from still kettle, extract whole heavy oil contained in rosin out has thick aromatic hydrocarbons to enter oil storage barrel through little condenser cooling; B the temperature of () still kettle is raised to 270 DEG C ~ 280 DEG C; keep the vacuum constant, rosin is gaseous state by liquid conversion in still kettle, through being cooled to 230 DEG C ~ 250 DEG C; rosin has gaseous state to be converted into liquid state; flow in reactor, add 0.05% ~ 0.15% rosin discoloring agent, under ceaselessly stirring; be warmed up to 270 DEG C; slowly be cooled to 180 DEG C ~ 220 DEG C again, then add 0.05% ~ 0.15% rosin stablizer, then be cooled to 90 DEG C ~ 120 DEG C blowings packaging or by granulator granulation.In this production method, the distillation temperature of material is too high, the easy decarboxylation of rosin, unstable product quality, and production efficiency is low.

Summary of the invention

The invention provides a kind of pale rosin high vacuum continuous still battery production method, the product pale rosin steady quality obtained according to this production method, its acid number and softening temperature high.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A kind of pale rosin high vacuum continuous still battery production method, comprises the following steps:

First liquid rosin continus convergence is entered molecular distillation system, under Distallation systm vacuum tightness is 6mm ~ 8mm, is warming up to 150 DEG C ~ 180 DEG C, to make in rosin contained whole heavy oil and thick aromatic hydrocarbons gasify and enter in storage tank after cooling to collect; Then by the rosin of whole for described removing heavy oil and thick aromatic hydrocarbons when Distallation systm vacuum tightness is constant, continue to be warming up to 220 DEG C ~ 250 DEG C, now rosin is gaseous state by liquid conversion, enters storage tank obtain this pale rosin finally by being cooled to 150 DEG C ~ 180 DEG C.

Owing to adopting technique scheme, the beneficial effect that the present invention obtains is:

1. according to the product pale rosin that production method of the present invention is obtained, its acid number and softening temperature is high, steady quality, and do not need in process of production to add rosin stablizer, reduce production cost.

2. the present invention can continuous seepage pale rosin, improves the production efficiency of pale rosin.

Embodiment

Below in conjunction with example, the invention will be further described:

Embodiment 1

First liquid rosin continus convergence is entered molecular distillation system, under Distallation systm vacuum tightness is 6mm, is warming up to 150 DEG C, to make in rosin contained whole heavy oil and thick aromatic hydrocarbons gasify and enter in storage tank after cooling to collect; Then when described Distallation systm vacuum tightness is constant, continue to be warming up to 220 DEG C, now rosin is gaseous state by liquid conversion, enters storage tank obtain this pale rosin finally by being cooled to 150 DEG C.

Embodiment 2

First liquid rosin continus convergence is entered molecular distillation system, under Distallation systm vacuum tightness is 7mm, is warming up to 165 DEG C, to make in rosin contained whole heavy oil and thick aromatic hydrocarbons gasify and enter in storage tank after cooling to collect; Then when described Distallation systm vacuum tightness is constant, continue to be warming up to 230 DEG C, now rosin is gaseous state by liquid conversion, enters storage tank obtain this pale rosin finally by being cooled to 170 DEG C.

Embodiment 3

First liquid rosin continus convergence is entered molecular distillation system, under Distallation systm vacuum tightness is 8mm, is warming up to 180 DEG C, to make in rosin contained whole heavy oil and thick aromatic hydrocarbons gasify and enter in storage tank after cooling to collect; Then when described Distallation systm vacuum tightness is constant, continue to be warming up to 250 DEG C, now rosin is gaseous state by liquid conversion, enters storage tank obtain this pale rosin finally by being cooled to 180 DEG C.

Carry out Performance Detection to the pale rosin that embodiment 1 ~ embodiment 3 obtains, and compare with the tasteless rosin of light color that the patent system according to publication number being CN 1730584A obtains, result is as table 1.

Table 1

Claims (1)

1. a pale rosin high vacuum continuous still battery production method, is characterized in that the method comprises the following steps:

First liquid rosin continus convergence is entered molecular distillation system, under Distallation systm vacuum tightness is 6mm ~ 8mm, is warming up to 150 DEG C ~ 180 DEG C, to make in rosin contained whole heavy oil and thick aromatic hydrocarbons gasify and enter in storage tank after cooling to collect; Then by the rosin of whole for described removing heavy oil and thick aromatic hydrocarbons when Distallation systm vacuum tightness is constant, continue to be warming up to 220 DEG C ~ 250 DEG C, now rosin is gaseous state by liquid conversion, enters storage tank obtain this pale rosin finally by being cooled to 150 DEG C ~ 180 DEG C.