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Method for preparing natural benzaldehyde byspraying and continuous hydrolysis

A benzaldehyde and natural technology, which is applied in the field of spraying continuous hydrolysis to prepare natural benzaldehyde, can solve the problems of reducing the natural degree of benzaldehyde, uneven dispersion of cinnamaldehyde, and long retention time of cinnamaldehyde, so as to improve the utilization rate of raw materials and the natural degree High, easy-to-operate effect

Active Publication Date: 2019-10-18
FUJIAN SENFA BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patents (CN1446789A, CN1749231A, CN1911891A, CN101985414A) have improved the production equipment of this method, the cost has been reduced, and the quality has also been improved, but the impurity content is still relatively high
Lu Xiuyang etc. (CN1597653A, CN1834080A) reported the method for preparing benzaldehyde in near-critical water, which realized the greening of the process, but there were many by-products, poor selectivity, high requirements for equipment, and reduced the natural degree of benzaldehyde
[0005] Above-mentioned method all carries out cinnamaldehyde hydrolysis in liquid phase and prepares benzaldehyde, and cinnamaldehyde is dispersed inhomogeneously all the time, and lye and cinnamaldehyde contact are not enough, and hydrolysis efficiency is not high, and cinnamaldehyde stays in lye too long, by-product More disadvantages

Method used

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  • Method for preparing natural benzaldehyde byspraying and continuous hydrolysis
  • Method for preparing natural benzaldehyde byspraying and continuous hydrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0050] 1. Add clean water to the oil-water separator until the water comes out of the return pipe.

[0051] 2. Prepare lye with NaOH solution with a mass concentration of 2% and Na2CO3 solution with a mass concentration of 2%, then add the prepared lye to the middle of the sight glass of the hydrolysis kettle, turn on the steam, and the steam enters the lye heating coil , through the lye heating coil to heat the lye to a boiling state, the generated steam is collected and condensed to the return pipe of the oil-water separator and returned to the hydrolysis kettle, and the flow rate of the returned water reaches 250kg / h.

[0052] 3. Spray continuous hydrolysis: Start the lye circulation pump, control the flow rate to 300kg / h, and the pressure to 0.09MPa, and spray lye into the hydrolysis kettle from 10 lye nozzles installed in the hydrolysis kettle. Start the raw material metering pump, and spray 110°C hydrolyzed raw material cinnamaldehyde (cinnamaldehyde content 95.2%) into ...

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Abstract

The invention discloses a method for preparing natural benzaldehyde by spraying and continuous hydrolysis, and belongs to the field of deep processing of agricultural and forestry chemical products.The method for preparing natural benzaldehyde by spraying and continuous hydrolysis comprises the following steps that S1, cinnamon oil or cinnamaldehyde is selected as a raw material, alkali liquor isprepared as hydrolysate; S2, cinnamon oil or cinnamaldehyde is heated to 60 to 200 DEG C; S3, the alkali liquoris injected into the interior of a hydrolysis kettle, heateduntil boiling, and kept in aboiling state; S4,the cinnamon oil or cinnamaldehyde heated to 60 to 200 DEG C is sprayed into the interior of the hydrolysis kettle in an atomization mode, while the alkali liquorin the boiling stateis re-injected into the interior of the hydrolysis kettle in the atomization mode, the cinnamon oil or cinnamaldehyde is in full contact with thealkali liquor inside the hydrolysis kettle in a spraying and hedging mode, and benzaldehyde is produced through hydrolysis. The method for preparing the natural benzaldehyde by spraying and continuous hydrolysis,the hydrolysis is carried out inthe spraying and hedging mode in the form of a mist by using the heated raw material and the boiling hydrolysate.

Description

technical field [0001] The invention belongs to the field of intensive processing of agricultural and forestry chemical products, and in particular relates to a method for preparing natural benzaldehyde by jet continuous hydrolysis. Background technique [0002] Natural benzaldehyde is the main component of bitter almond oil extract, and can also be extracted from apricot, cherry, laurel leaves, and peach pits. It is widely used in food, beverage, essence, tobacco and other industries. With the improvement of living standards, People have higher and higher requirements for food safety, and they are more inclined to use safer and healthier natural food additives. Natural benzaldehyde has a special smell of almonds, and it exists in large quantities in essential oils such as cinnamon oil, bitter almond oil, and walnut oil. It is one of the goods in shortage of international and domestic spices; due to the limited natural plant resources, direct extraction from natural plants ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C45/42C07C47/54
CPCC07C45/42C07C47/54
Inventor 黄金龙邱安彬许鹏翔
Owner FUJIAN SENFA BIOTECH
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