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A low-energy recovery system and process for abamectin extraction solvent

A technology for abamectin and solvent extraction, applied in the field of low energy consumption recovery systems, can solve problems such as energy waste, and achieve the effects of high efficiency utilization and high solvent recovery efficiency

Active Publication Date: 2019-09-03
QILU PHARMA INNER MONGOLIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies in the prior art, the present invention provides a recovery system and process of abamectin extraction solvent, to solve the problem of energy waste in the traditional abamectin extraction solvent recovery process

Method used

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  • A low-energy recovery system and process for abamectin extraction solvent
  • A low-energy recovery system and process for abamectin extraction solvent
  • A low-energy recovery system and process for abamectin extraction solvent

Examples

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Effect test

Embodiment 1

[0036] A kind of recovery system of abamectin extraction solvent, this system comprises methanol storage tank 1, leaching column 2, crystallization tank 3, methanol vapor buffer tank 4, rectification tower 5, condenser 6 and methanol collection tank 7;

[0037] The discharge port of the methanol storage tank 1 is connected with the feed port of the leaching tank 2, the discharge port of the leaching tank 2 is connected with the feed port of the crystallization tank 3, and the leaching tank 2 and crystallization tank 3 steam outlets are connected with the inlet of methanol vapor buffer tank 4 respectively, and the upper end of described methanol vapor buffer tank 4 is connected with rectifying column 5 and condenser 6 respectively, and described methanol vapor buffer tank The lower end of 4 is connected with methanol collection tank 7; described condenser 6 is connected with methanol collection tank 7, and described methanol collection tank 7 is also connected rectification colu...

Embodiment 2

[0041] A kind of recovery process that utilizes the system of embodiment 1 to Abamectin extraction solvent, comprises steps as follows:

[0042] Methanol is pumped into the extraction column 2 from the methanol storage tank 1 to extract the dry powder of abamectin mycelium, and the extraction solution is transferred to the crystallization tank 3 for crystallization, and the extraction column 2 and crystallization The bottom of the tank 3 is fed with hot steam to heat and evaporate the methanol, and the wet fungus residue of abamectin adsorbed with methanol in the extraction column 2 is heated up to 90-95°C and kept for 2-3 hours; Raise the temperature of the material to 60-70°C and keep it for 2-3 hours, then raise the temperature to 70-80°C and keep it for 4-6 hours;

[0043] The methanol vapor in the leaching column 2 and the crystallization tank 3 is transported to the methanol vapor buffer tank 4 through respective pipelines for buffering, and then the buffered methanol va...

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Abstract

The invention relates to a low-energy recovery system and process for extracting solvents of abamectin. The system includes a methanol storage tank, an extraction column, a crystallization tank, a methanol vapor buffer tank, a rectification tower, a condenser and a methanol collection tank; methanol A control valve is arranged between the vapor buffer tank and the condenser. The methanol evaporated from the leaching column and the methanol evaporated from the crystallization tank enter the buffer tank through a separate pipeline, and then enter the rectification tower, avoiding the cooling and heating process. The invention not only has high solvent recovery efficiency, but also can realize the methanol vapor in the process of concentrating the abamectin extract solution and the process of distilling wine with leaching column bacteria slag directly into the rectification tower without being condensed, thereby realizing efficient utilization of energy. According to the actual production test, nearly 70% of the methanol steam in the two processes can be directly fed into the tower, which can save 20% of the steam used for solvent recovery, and reduce the circulation of cooling water by about 4,000 tons / day, thereby reducing the extraction of abamectin cost.

Description

[0001] Technical field: [0002] The invention relates to a low-energy recovery system and process for abamectin extraction solvent, and belongs to the technical field of pesticide product production. [0003] Background technique: [0004] Abamectin is a new type of anthelmintic with high efficiency, low toxicity, safety, and broad spectrum of insect resistance. repellent effect. Abamectin has the characteristics of broad spectrum, high efficiency, small usage, safety to humans and animals, and no cross-resistance. It is regarded as the best new anti-parasitic drug at home and abroad. Abamectin, one of the most effective pesticides in the world, has a domestic demand of about 4,100 tons and has become a vital product in pesticides. [0005] At present, there are two processes in the extraction process of abamectin that involve the recovery of solvents, namely, the process of concentrating the extract and the process of evaporating the residue of the extraction column. Accor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C29/76C07C29/80C07C31/04
CPCC07C29/76C07C29/80C07C31/04Y02P20/50
Inventor 梁振兵刘世宽
Owner QILU PHARMA INNER MONGOLIA
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