Process for synthesizing novel high-efficient feeding promoting agent for fish and prawn

Abstract

The invention discloses a method for synthesizing a novel and high-efficiency feeding promoting agent for fish and shrimp. The method takes dimethyl sulfide and halogenated carboxylic acid as raw materials, takes ethyl acetate as a solvent, and takes diethylamine as a catalyst to prepare methyl thetine. The synthesis process saves a plurality of steps including the taking-out of a crystal ingot product, crushing, the elimination of impurities, the washing of the solvent, and the like, thereby bringing about a simpler synthesis process, further optimizing the technology, saving energy source, reducing cost, and primarily putting an end to pollution. Therefore, the technological level of the project is supposed to reach the world leading level.

Description

technical field [0001] The invention relates to a synthesis method of a food attractant, in particular to a synthesis method of a fish and shrimp food attractant, belonging to the field of aquatic food attractants. Background technique [0002] The role of food attractants in compound feed for aquatic animals has been generally recognized, but currently most aquatic animal food attractants are extracted from natural animals and plants, the process is complicated and the cost is too high. Due to the high cost of use, the application of attractants is subject to certain restrictions. At the same time, the use of food attractants also increases the cost of fish and shrimp farming, and finally increases the burden on consumers due to the transfer of costs. Therefore, the artificial synthesis of attractants is an inevitable trend of development. [0003] In the 1980s, Japanese scholars found that DMT and DMPT had food-attracting and anti-inflammatory properties for many test fi...

AI Technical Summary

Problems solved by technology

The main problem of this process is that it is very difficult to take out the product from the reactor due to the formation of hard crystal blocks after the reaction is completed, and in the later stage of the reaction, the stirring cannot be rotated due to the agglomeration in the reactor, and the reaction If the product cannot be fully mixed, it will affect the progress of the reaction. When the product is taken out from the reactor and crushed, many problems will also be encountered.

Since unreacted dimethyl sulfide is still embedded in the product, it will emit foul odor during the pulverization process, causing certain pollution to the environment

And this shredding process is also time and energy consuming

The strong hygroscopicity of the product will affect the crushing effect, which will further affect the effect of washing with organic solvents later, resulting in incomplete removal of impurities. In order to remove impurities, the process proposes to use selective solvents under freezing conditions, such as ether, Petroleum ether, chloroform, benzene, etc., wash the product more than three times

However, these solvents have problems such as easy fire and combustion or high toxicity, which brings inconvenience to the operation.

More due to the use of these solvents, the yield of the product decreased

[0004] To sum up, the main problems of the above-mentioned processes are that the process is complicated, the process is cumbersome, the cost is too high, the energy consumption is too large, and it is easy to cause environmental pollution

However, there is no report on the improvement of the process

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