CN105622479A - Process for synthesizing beta-carotene - Google Patents

Abstract

The invention discloses a process for synthesizing beta-carotene. The process comprises the following steps: mixing 5-10 vol% of organic secondary amine, 10-15 vol% of organic alkane and 75-85 vol% of methanol or ethanol to obtain a reaction promoting liquid; dissolving 2,4-pentadiene pentacarbon phosphate and 2,7-dimethyl-2,4,6-octatriene-1,8-dialdehyde in the reaction promoting liquid according to the molar ratio of (2-2.2):1; and keeping the reaction temperature to be -10 to 0 DEG C, and adding an alkali compound in the reaction promoting liquid of the last step, and carrying out a reaction to obtain the beta-carotene. The process for synthesizing the beta-carotene has the advantages that the yield of the beta-carotene is high and can reach 85%, the selected raw materials are cheaper, the synthesis cost is low, the post-treatment is simple, the solvent can be recovered and reused, and the production operation is convenient.

Description

The synthesis technique of beta-carotene

Technical field

The invention belongs to chemical process field, be specifically related to the synthesis technique of a kind of beta-carotene.

Background technology

The basic processes such as the synthesis technique of beta-carotene at least includes standing, washing, dry and recrystallization. In the synthesis technique of current beta-carotene, technological process is not easy to implement, and separation efficiency is low, it is impossible to achieve the recycling of raw material, and manufacturing process is complicated, and production efficiency is low.

Summary of the invention

For the above-mentioned technical problem overcoming prior art to exist, it is an object of the invention to, it is provided that the synthesis technique of a kind of beta-carotene, the present invention not only manufacturing process is simple, improve work efficiency, and achieves the guarantee of product quality.

The synthesis technique of beta-carotene provided by the invention, comprises the following steps:

(1) organic secondary, the organic alkane of 10��15%, the methanol of 75��85% or ethanol that percent by volume is 5��10% are mixed to get reaction and promote liquid;

(2) by the mol ratio of 2��2.2: 1, by 2,4-pentadiene 15 carbon phosphate ester and 2,7-dimethyl-2,4,6-sarohornene-1,8-dialdehyde is dissolved in reaction and promotes in liquid;

(3) keeping reaction temperature at-10��0 DEG C, the reaction in previous step promotes to add in liquid alkali compounds, is obtained by reacting beta-carotene.

The synthesis technique of beta-carotene provided by the invention, it has the beneficial effects that, overcoming prior art, to prepare operation in the process of beta-carotene more, and the problem that workload is big improves work efficiency; Improve the utilization rate of catalyst.

Detailed description of the invention

Below in conjunction with an embodiment, the synthesis technique of beta-carotene provided by the invention is described in detail.

Embodiment

The synthesis technique of the beta-carotene of the present embodiment, comprises the following steps:

(1) organic secondary, the organic alkane of 15%, the methanol of 75% or ethanol that percent by volume is 10% are mixed to get reaction and promote liquid;

(2) by the mol ratio of 2.2: 1, by 2,4-pentadiene 15 carbon phosphate ester and 2,7-dimethyl-2,4,6-sarohornene-1,8-dialdehyde is dissolved in reaction and promotes in liquid;

(3) keeping reaction temperature at 0 DEG C, the reaction in previous step promotes to add in liquid alkali compounds, is obtained by reacting beta-carotene.

The synthesis technique of beta-carotene, can directly prepare beta-carotene, it is not necessary to be processed further, and operation is simple, and measurement data is accurate, it is easy to implement.

Claims (1)

1. the synthesis technique of a beta-carotene, it is characterised in that: said method comprising the steps of:

(1) organic secondary, the organic alkane of 10��15%, the methanol of 75��85% or ethanol that percent by volume is 5��10% are mixed to get reaction and promote liquid;

(2) by the mol ratio of 2��2.2: 1, by 2,4-pentadiene 15 carbon phosphate ester and 2,7-dimethyl-2,4,6-sarohornene-1,8-dialdehyde is dissolved in reaction and promotes in liquid;

(3) keeping reaction temperature at-10��0 DEG C, the reaction in previous step promotes to add in liquid alkali compounds, is obtained by reacting beta-carotene.