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Dimethyl decanedioate separation continuous rectification method

A technology of dimethyl sebacate and rectification, which is applied in chemical instruments and methods, preparation of carboxylic acid esters, preparation of organic compounds, etc., can solve the problems of low production efficiency and high labor intensity, and achieve the improvement of production efficiency, The effect of reducing labor intensity and stable and reliable product quality

Active Publication Date: 2015-07-22
SHANDONG TIANXING BIOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The object of the present invention is to provide the dimethyl sebacate separation continuous rectification method, adopts the dimethyl sebacate crude product to be pumped in the light removal tower, internal temperature rises, reflux distills out the light components; the crude oil in the light removal tower The ester enters the weight-removing tower to reflux to collect the product, and the heavy component is discharged from the bottom of the reboiler, and the reflux product is cooled to obtain the technical solution of the finished product of dimethyl sebacate, which solves the labor-intensive and low-efficiency of the current intermittent production process problems and improved product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Controlled by DCS, put the crude product of dimethyl sebacate into the neutralization tank, pour 5% sodium carbonate solution into the neutralization tank to neutralize to pH=7.5, and the neutralized product enters the settling tank Settling, the crude ester from the settling tank is pumped into the light removal tower, fed from the stripping section, and the pressure of the light removal tower is 2000Pa. When the reflux temperature at the top of the light removal tower reaches 180°C, reflux for 2 hours and begin to collect light components, and keep the reflux temperature at 178-182°C during collection. The reboiler is used to heat the tank of the light removal tower, and the reboiler uses heat transfer oil, and the temperature of the heat transfer oil is kept at 240°C. The heavy components in the de-lightening tower tank enter the de-weighting tower tank through the middle tank and are heated by a reboiler. The reboiler uses heat transfer oil, and the temperature of th...

Embodiment 2

[0046] Controlled by DCS, put the crude product of dimethyl sebacate into the neutralization tank, pour 5% sodium carbonate solution into the neutralization tank to neutralize to pH=7.5, and the neutralized product enters the settling tank Settling, the crude ester from the settling tank is pumped into the light removal tower, fed from the stripping section, and the pressure of the light removal tower is 2000Pa. When the reflux temperature at the top of the light removal tower reaches 180°C, reflux for 3 hours and begin to collect light components, and keep the reflux temperature at 178-182°C during collection. The reboiler is used to heat the tank of the light removal tower, and the reboiler uses heat transfer oil, and the temperature of the heat transfer oil is kept at 255°C. The heavy component in the de-lightening tower tank enters the de-weighting tower tank through the middle tank and is heated by a reboiler, and the reboiler uses heat transfer oil, and the temperature o...

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Abstract

The invention belongs to the technical field of dimethyl decanedioate rectification, and particularly provides a dimethyl decanedioate separation continuous rectification method. According to the technical scheme, the dimethyl decanedioate separation continuous rectification method is characterized in that a dimethyl decanedioate crude product is pumped into a light-component removal tower, the temperature inside the light-component removal tower rises, and light components are distilled out through backflow; crude esters in the light-component removal tower enter a heavy-component removal tower to backwards flow, so that a product is collected, heavy components are discharged from the bottom of a reboiler, and the product collected through backflow is cooled to obtain the dimethyl decanedioate finished product. The technical scheme has the advantages of solving the problems of being high labor intensity and low production efficiency in a conventional batch production technology, and improving the product quality.

Description

technical field [0001] The invention belongs to the technical field of dimethyl sebacate rectification, in particular to a continuous rectification method for separating dimethyl sebacate. Background technique [0002] Dimethyl sebacate [0003] CAS No.: 106-79-6 [0004] Molecular formula: C 12 h 22 o 4 [0005] Molecular weight: 230.31 [0006] Packing: industrial dimethyl sebacate is packed in a dry and clean galvanized iron drum. [0007] Transportation: During transportation, handle it with care, do not turn it upside down, and protect it from rain and sun, and do not mix it with oxidants for transportation. [0008] Storage: Should be stored in a cool dry place. [0009] Skin contact: Take off contaminated clothing and wash with running water. [0010] Eye contact: Lift the eyelids, rinse with running water or saline, seek medical attention. [0011] Ingestion: Drink enough warm water and induce vomiting. Seek medical attention. [0012] Dimethyl sebacate i...

Claims

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Application Information

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IPC IPC(8): C07C69/50C07C67/54
Inventor 怀进步梁晓张含博
Owner SHANDONG TIANXING BIOTECH
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