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Technology for continuous esterification of ethyl lactate
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A technology of ethyl lactate continuous ester and ethyl lactate, which is applied in the field of continuous ethyl lactate esterification process, can solve the problems of low equipment utilization rate, large quality fluctuation, many by-products, etc., and achieves low operating cost and high extraction purity. , the effect of simple process
Inactive Publication Date: 2016-12-14
盐城华德(郸城)生物工程有限公司
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Problems solved by technology
[0002] In the ethyl lactate esterification process, the orthoethyl lactate esterification process is an intermittent feeding and discharging process, with high labor intensity, low equipment utilization, low output, large temperature changes in the process, large quality fluctuations, and many by-products , the production cost is high, so the development of a continuous esterification process of ethyl lactate with simple esterification process, low operating cost, high post-extraction purity, stable quality, high output and low unit consumption
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Embodiment 1
[0018] When the present invention was carried out, a kind of ethyl lactate continuous esterification process, it comprises following operating steps:
[0019] Step 1: Prepare the ingredients, continuously batch the lactic acid and alcohol according to the ratio of 1:1;
[0020] Step 2: Put the base material, put the 1:1 lactic acid and alcohol prepared in step 1 into the esterification reaction kettle with a 3.6L centrifugal pump, and add a new catalyst at the same time;
[0021] Step 3: Carry out continuous esterification at a temperature of 80-90°C;
[0022] Step 4: Use a paddle stirrer for continuous stirring;
[0023] Step 5: heating, heating for 3-4h, heating to 80-90°C;
[0024] Step 6: Vaporization, continuously vaporize the ethyl lactate in the reactor for 24 hours without interruption;
[0025] Step 7: separation, the ethyl lactate vaporized in step 6 is separated using a rectification tower and a gas delivery pump;
[0026] Step 8: Gather, use 60m 2 The condense...
Embodiment 2
[0030] When the present invention was carried out, a kind of ethyl lactate continuous esterification process, it comprises following operating steps:
[0031] Step 1: Prepare the ingredients, continuously batch the lactic acid and alcohol according to the ratio of 1:1;
[0032] Step 2: Put the base material, put the 1:1 lactic acid and alcohol prepared in step 1 into the esterification reaction kettle with a 3.6L centrifugal pump, and add a new catalyst at the same time;
[0033] Step 3: Carry out continuous esterification at a temperature of 80-90°C;
[0034] Step 4: Use a paddle stirrer for continuous stirring;
[0035] Step 5: heating, heating for 3-4h, heating to 80-90°C;
[0036] Step 6: Vaporization, continuously vaporize the ethyl lactate in the reactor for 24 hours without interruption;
[0037] Step 7: separation, the ethyl lactate vaporized in step 6 is separated using a rectification tower and a gas delivery pump;
[0038] Step 8: Gather, use 60m 2 The condense...
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Abstract
The invention relates to a technology for continuous esterification of ethyl lactate. The technology comprises the steps of 1, material preparing and blending, wherein lactic acid and ethyl alcohol are blended continuously according to the ratio of 1:1 for use; 2, bed charge feeding, wherein lactic acid and ethyl alcohol prepared in step 1 according to the ratio of 1:1 are placed in an esterification reaction still by means of a 3.6 L centrifugal pump, and a novel catalyst is added at the same time; 3, conducting continuous esterification at 80-90 DEG C; 4, conducting continuous stirring with a paddleagitator; 5, heating, wherein heating lasts for 3-4 h to 80-90 DEG C; 6, vaporization, wherein continuous vaporization is conducted on ethyl lactate in the reaction still for 24 h; 7, separation, wherein vaporized ethyl lactate obtained in step 6 is separated with a rectifying column and a gas delivery pump. The technology has the advantages that utilization rate is high, operation cost is low, extraction purity is high, and the technology is simple.
Description
technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a continuous esterification process of ethyl lactate. Background technique [0002] In the ethyl lactate esterification process, the orthoethyl lactate esterification process is an intermittent feeding and discharging process, with high labor intensity, low equipment utilization, low output, large temperature changes in the process, large quality fluctuations, and many by-products , The production cost is high, so the development of a continuous esterification process of ethyl lactate with simple esterification process, low operating cost, high post-extraction purity, stable quality, high output and low unit consumption. Contents of the invention [0003] The purpose of the present invention is in order to overcome the deficiencies in the prior art, and provide a kind of ethyl lactate continuous esterification process with higher utilization rate of equi...
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Application Information
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