Production method of high-content and low-trimethyl ester spermine

A technology of trimethylspermine and a production method, which is applied to the production field of high-content and low-trimethylspermine, can solve problems such as single structure, and achieve the effects of simplifying material components, reducing scaling probability and solving safety problems.

Inactive Publication Date: 2014-04-16
荆州沙隆达控股有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the domestic product structure is relatively single. In order to expand market sales, enrich the product structure (newly added 97% spermine specification), research on the production method of high-content and low-trimethyl ester spermine is the market demand.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The production method of high-content low trimethyl ester spermine of the present invention, implementation steps are as follows:

[0016] (1) Crude amine water washing: the crude amine is washed in advance. The crude amine water washing method is to fully dissolve and mix the crude amine and water through the transfer pump according to the flow ratio of 1:2, and then enter the oil-water separator for layer separation. , to obtain the crude aminated product after water washing and stratification; and extracting and recovering the aminated product dissolved in the waste water after the crude amine was washed with water.

[0017] (2) Precipitation of high-vacuum unit: the crude amine after washing and stratification is pumped to the high-level tank of crude amine through the preparation pump, and then the crude amine is sent to the evaporator for desolventization; the crude amine entering the evaporator is adjusted The chemical flow rate is 1300L / h, the vacuum degree in t...

Embodiment 2

[0020] The process of the method is the same as in Example 1, the difference is: (1) Crude amine washing: the crude amine is washed in advance, and the crude amine is washed by fully dissolving the crude amine and water through the transfer pump according to the flow ratio of 1:2.5 After mixing, it enters the oil-water separator and separates in layers; (2) Precipitation of the high vacuum unit: adjust the flow rate of the crude aminate entering the evaporator to 1400L / h, control the liquid temperature of the material in the evaporator to 124°C, and control the air temperature to 90 ℃.

[0021] The indicators of spermine after precipitation are as follows: main content of spermine > 97.5%, water content < 0.2%, trimethyl ester content < 2.2%, ammonium chloride content < 0.1%.

Embodiment 3

[0023] The method process is the same as the first embodiment, the difference is that:

[0024] (1) Crude amine water washing: pre-wash the crude amine with water. The crude amine water washing method is to fully dissolve and mix the crude amine and water through the transfer pump according to the flow ratio of 1:3, then enter the oil-water separator and separate them in layers (2) Precipitation of high-vacuum unit: adjust the flow rate of the crude aminate entering the evaporator to 1500L / h, control the liquid temperature of the material in the evaporator to 126°C, and control the air temperature to 95°C.

[0025] The indicators of spermine after precipitation are as follows: main content of spermine > 97.2%, water content < 0.3%, trimethyl ester content < 2.1%, ammonium chloride content < 0.4%.

[0026] The working principle of the present invention is as follows:

[0027] (1) Washing of crude amine: Since the production of crude amine is accompanied by the generation of a ...

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Abstract

The invention discloses a production method of high-content and low-trimethyl ester spermine, which comprises the following steps of: coarse amine water washing: washing a coarse amine compound with water in advance, and obtaining the coarse amine compound after water washing and lamination, and (2) high vacuum unit desolvation: conveying the coarse amine compound after the water washing and the lamination into a coarse amine compound head tank through a stock pump and then conveying the coarse amine compound into an evaporator for desolvation. According to the method, with the adoption of the coarse amine water washing, substance components in the coarse amine compound are simplified, the safety problem caused by pipeline blocking due to salt in a desolvation procedure is basically solved at the same time, the scaling probability due to concentration of ammonium chloride and ammonia scale in a vacuum pump in a desolvation process is greatly reduced, the product quality after desolvation can be ensured, furthermore, the production energy consumption is greatly reduced, and the maintenance expense is also greatly lowered.

Description

technical field [0001] The invention relates to the technical field of acephate, in particular to a production method of spermine with high content and low trimethyl ester. Background technique [0002] O,O-Dimethylthiophosphoramide (hereinafter referred to as spermine) is the main intermediate for the production of acephate, an organophosphorus pesticide with high efficiency and low toxicity. [0003] Acephate belongs to a water-soluble broad-spectrum insecticide and acaricide, which has stomach poisoning, contact killing and systemic effects, and can be used to control various pests of rice, corn, cotton and other crops. It can also be used for vegetable crops, cotton, cabbage and potatoes etc. Its insecticidal mechanism is to inhibit the activity of cholinesterase in pests. It has been produced and applied in China for decades. So far, acephate is still a large-tonnage pesticide product produced and sold in the international market, with an annual sales volume of more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07F9/24
Inventor 余志金樊响平金运才
Owner 荆州沙隆达控股有限公司
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