阅读说明：本技术 一种棕榈油脂肪酸镁制备方法及应用 (Preparation method and application of palm oil fatty acid magnesium ) 是由 郭向荣 王海 于 2020-08-20 设计创作，主要内容包括：本发明公开了一种棕榈油脂肪酸镁制备方法,包括以下步骤：(1)向反应釜通氮气排氧,排氧时加大氮气流量,待排完氧后,调小氮气流量,在氮气保护下加入乙二醇聚氧乙烯醚、棕榈油,在搅拌下加热,制得加热后的混合物a；(2)向步骤(1)制得的混合物a中加入氢氧化镁搅拌,制得混合物b；(3)将步骤(2)制得的混合物b加热,加入水和顺丁烯二酸酐,保持温度不变,加大转速搅拌反应,制得反应物；(4)将步骤(3)制得的反应物进行过滤、脱水、回收顺丁烯二酸和乙二醇聚氧乙烯醚,然后搅拌下通水冷却,制得棕榈油脂肪酸镁。本发明生产棕榈油脂肪酸镁效率高,适合规模化生产,对环境污染较小,低碳环保,可大力推广在饲料添加剂中应用。(The invention discloses a preparation method of palm oil fatty acid magnesium, which comprises the following steps: (1) introducing nitrogen into the reaction kettle for oxygen discharge, increasing the nitrogen flow during the oxygen discharge, regulating the nitrogen flow to be small after the oxygen discharge is finished, adding ethylene glycol polyoxyethylene ether and palm oil under the protection of nitrogen, and heating under stirring to prepare a heated mixture a; (2) adding magnesium hydroxide into the mixture a prepared in the step (1) and stirring to prepare a mixture b; (3) heating the mixture b prepared in the step (2), adding water and maleic anhydride, keeping the temperature unchanged, increasing the rotating speed, and stirring for reaction to prepare a reactant; (4) and (4) filtering and dehydrating the reactant prepared in the step (3), recovering maleic acid and ethylene glycol polyoxyethylene ether, and then introducing water for cooling while stirring to prepare the magnesium palm oil fatty acid. The method for producing the magnesium palmitate fatty acid has high efficiency, is suitable for large-scale production, has less environmental pollution, is low-carbon and environment-friendly, and can be widely popularized and applied to feed additives.)

1. The preparation method of the magnesium palm oil fatty acid is characterized by comprising the following steps of:

(1) introducing nitrogen into the reaction kettle for oxygen discharge, increasing the nitrogen flow to 0.9-1.2L/min during the oxygen discharge, regulating the nitrogen flow to 0.1-0.2L/min after the oxygen discharge is carried out for 10-14min, adding 30-45g of ethylene glycol polyoxyethylene ether with the average molecular weight of 1000 and 312-350g of palm oil under the protection of nitrogen, stirring and heating to 62-65 ℃ at the rotating speed of 200-300r/min to prepare a heated mixture a; (2) adding 19-22g of magnesium hydroxide into the mixture a prepared in the step (1), and stirring for 8-14min at the rotating speed of 300-500r/min to prepare a mixture b; (3) heating the mixture b prepared in the step (2) to 106-; (4) and (4) filtering and dehydrating the reactant prepared in the step (3), recovering maleic acid and ethylene glycol polyoxyethylene ether with the average molecular weight of 1000, and then introducing water for cooling while stirring to prepare the magnesium palm oil fatty acid.

2. The method for preparing magnesium palm oil fatty acid according to claim 1, wherein the nitrogen flow is reduced to 0.1L/min after 12min of oxygen discharge in step (1).

3. The method for preparing magnesium palm oil fatty acid according to claim 1, wherein the average molecular weight of the polyoxyethylene glycol ether in the step (1) is 1000.

4. The method for preparing magnesium palm oil fatty acid according to claim 1, wherein the mass ratio of the ethylene glycol polyoxyethylene ether to the palm oil in the step (1) is 38: 340.

5. The method for preparing magnesium palmitate according to claim 1, wherein the heating conditions in step (1) are: the mixture was heated to 64 ℃ with stirring at a rotational speed of 300 r/min.

6. The method for preparing magnesium palm oil fatty acid according to claim 1, wherein the mass ratio of palm oil to magnesium hydroxide is 340: 20.6.

7. The method for preparing magnesium palmitate according to claim 1, wherein the stirring conditions in step (2) are as follows: stirring for 8min at the rotating speed of 500 r/min.

8. The method for preparing magnesium palm oil fatty acid according to claim 1, wherein the mass ratio of the water to the maleic anhydride in the step (3) is 15.8: 5.

9. The method for preparing magnesium palmitate according to claim 1, wherein the temperature in step (3) is kept constant at 115 ℃, and the stirring reaction is carried out for 75min at a rotation speed of 800 r/min.

10. Use of magnesium palm oil fatty acid salt prepared according to the process of any one of claims 1 to 9 in a feed additive.

Technical Field

The invention belongs to the technical field of fatty acid magnesium preparation, and particularly relates to a preparation method and application of palm oil fatty acid magnesium.

Background

The magnesium fatty acid is a derivative product of fatty acid and is widely applied to the fields of food, feed and the like.

Disclosure of Invention

The invention provides a preparation method and application of palm oil fatty acid magnesium, and aims to solve the problem of how to improve the magnesium content of palm oil fatty acid magnesium so as to meet the application requirement in a feed additive.

In order to solve the technical problems, the invention adopts the following technical scheme:

a preparation method of palm oil fatty acid magnesium comprises the following steps:

(1) introducing nitrogen into the reaction kettle for oxygen discharge, increasing the nitrogen flow to 0.9-1.2L/min during the oxygen discharge, regulating the nitrogen flow to 0.1-0.2L/min after the oxygen discharge is carried out for 10-14min, adding 30-45g of ethylene glycol polyoxyethylene ether with the average molecular weight of 1000 and 312-350g of palm oil under the protection of nitrogen, stirring and heating to 62-65 ℃ at the rotating speed of 200-300r/min to prepare a heated mixture a;

(2) adding 19-22g of magnesium hydroxide into the mixture a prepared in the step (1), and stirring for 8-14min at the rotating speed of 300-500r/min to prepare a mixture b;

(3) heating the mixture b prepared in the step (2) to 106-;

(4) and (4) filtering and dehydrating the reactant prepared in the step (3), recovering maleic acid and ethylene glycol polyoxyethylene ether with the average molecular weight of 1000, and then introducing water for cooling while stirring to prepare the magnesium palm oil fatty acid.

Preferably, in the step 1), after 12min of oxygen discharge, the nitrogen flow is reduced to 0.1L/min.

Preferably, the polyoxyethylene glycol ether in step (1) has an average molecular weight of 1000.

Preferably, the mass ratio of the ethylene glycol polyoxyethylene ether to the palm oil in the step (1) is 38: 340.

Preferably, the conditions of heating under stirring in step (1): the mixture was heated to 64 ℃ with stirring at a rotational speed of 300 r/min.

Preferably, the mass ratio of the palm oil to the magnesium hydroxide is 340: 20.6.

Preferably, the conditions of stirring in step (2): stirring for 8min at the rotating speed of 500 r/min.

Preferably, the mass ratio of the water to the maleic anhydride in the step (3) is 15.8: 5.

Preferably, the temperature in the step (3) is kept unchanged at 115 ℃, and the reaction is stirred for 75min under the condition that the rotation speed is increased to 800 r/min.

The invention also provides application of the palm oil fatty acid magnesium in a feed additive.

The invention has the following beneficial effects:

(1) the added glycol polyoxyethylene ether with the average molecular weight of 1000 can fully emulsify and disperse the palm oil, the particle size of the emulsified palm oil is extremely small, so that the palm oil can fully react with the magnesium maleate, and the magnesium hydroxide is excessive, so that the magnesium content of the palm oil fatty acid magnesium is further improved.

(2) The maleic anhydride added in the invention reacts with water to generate maleic acid, the maleic acid can promote catalytic reaction, so that the reaction of the maleic acid magnesium and the palm oil is quicker and more complete, and the magnesium hydroxide is excessive, thereby further improving the magnesium content of the palm oil fatty acid magnesium.

(3) The method for preparing the magnesium palmitate is characterized in that water is introduced for cooling, so that the magnesium palmitate is good in brittleness and easy to crush to produce powder, the production cost can be greatly reduced, and the problem of environmental pollution caused by dust generated by intermittent crushing is solved.

(4) The raw materials are easy to obtain, the price is low, the solvent can be recycled, the prepared palm oil fatty acid magnesium can be used as a novel non-toxic environment-friendly product, the magnesium content is up to more than 9.2 percent, the requirements of being applied to feed additives can be met, the animal growth is effectively promoted, and the meat quality is improved.

(5) The method for producing the magnesium palmitate fatty acid has high efficiency, is suitable for large-scale production, has less environmental pollution, is low-carbon and environment-friendly, and can be widely popularized and applied.

(6) The magnesium content of the magnesium palmitate fatty acid obtained by the method is obviously higher than that of the magnesium fatty acid obtained by the prior art, and is at least increased by 40.5 percent.

Detailed Description

In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.

In an embodiment, the preparation method of magnesium palm oil fatty acid comprises the following steps:

(1) introducing nitrogen into the reaction kettle for oxygen discharge, increasing the nitrogen flow to 0.9-1.2L/min during the oxygen discharge, regulating the nitrogen flow to 0.1-0.2L/min after the oxygen discharge is carried out for 10-14min, adding 30-45g of ethylene glycol polyoxyethylene ether with the average molecular weight of 1000 and 312-350g of palm oil under the protection of nitrogen, stirring and heating to 62-65 ℃ at the rotating speed of 200-300r/min to prepare a heated mixture a;

(2) adding 19-22g of magnesium hydroxide into the mixture a prepared in the step (1), and stirring for 8-14min at the rotating speed of 300-500r/min to prepare a mixture b;

(3) heating the mixture b prepared in the step (2) to 106-;

(4) and (4) filtering and dehydrating the reactant prepared in the step (3), recovering maleic acid and ethylene glycol polyoxyethylene ether with the average molecular weight of 1000, and then introducing water for cooling while stirring to prepare the magnesium palm oil fatty acid, wherein the magnesium palm oil fatty acid is applied to feed additives.

The following is a more specific example.