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Process and apparatus for removing foreign matter such as 'butyl mercaptan' from 'terbufos' crude product liquid

A technology of tertiary thiol and tertiary phosphonium, which is applied in the chemical industry, sustainable manufacturing/processing, climate sustainability, etc., can solve the problems of foreign exchange consumption, achieve the effect of small equipment investment, high efficiency, and energy saving

Inactive Publication Date: 2011-05-11
王爱彬
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Importing production equipment and technology from abroad requires a lot of foreign exchange

Method used

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  • Process and apparatus for removing foreign matter such as 'butyl mercaptan' from 'terbufos' crude product liquid
  • Process and apparatus for removing foreign matter such as 'butyl mercaptan' from 'terbufos' crude product liquid

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Embodiment Construction

[0020] A process for removing impurities such as "tert-butyl mercaptan" from "tert-butylphosphine" crude product liquid, the process steps are: 1) put phosphorus pentoxide, absolute ethanol, formaldehyde and ter-butyl mercaptan in the reaction tank in two steps The crude product liquid of "terbuylphosphine" obtained after condensation reaction and liquid separation treatment is stored in the raw material tank 21 through the delivery pipe 30, ②open the riser valve 22, open the vacuum device connected with the main vacuum pipe 4, and open the high-level tank negative Pressure valve 26, the "terbutylphosphine" crude product liquid filtered by the filter screen 29 will be transported to the high position tank 24 through the riser 23, ③ simultaneously open the negative pressure valve 15 of the vertical falling film distillation tower and the negative pressure valve 2 of the finished product tank to make The whole system is in a negative pressure state. ④ Pass high-temperature steam ...

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Abstract

The present invention discloses a process for removing impurities, such as tert-butyl mercaptan, from crude terbufos liquid and a device thereof. The main unit of the device is a vertical falling-film distillation column, which utilizes the difference between the boiling points of the terbufos and the impurities such as the tert-butyl mercaptan; when the system temperature is at 80 DEG C plus or minus 2 DEG C, the impurities, such as the tert-butyl mercaptan, are separated from the terbufos; and the impurities, such as the tert-butyl mercaptan, are upwardly extracted out through a vacuum system, while the terbufos downwardly enters into a liquid-collecting chamber. The purity of the product processed by the system is increased from previous 80 percent to 85 percent to more than 90 percent, thus meeting the requirement on an exported product. The process and the device, which are suitable for small and medium enterprises producing organophosphorus pesticides, have the advantages of little equipment investment, high efficiency, energy saving and quick returns.

Description

technical field [0001] The invention relates to a chemical process and a device, in particular to a process for removing impurities such as "tertiary butyl mercaptan" from a liquid crude product of "tertiary butylphosphine" and a device for realizing the process. Background technique [0002] In the 1970s, my country started large-scale production of the organophosphoterbufos pesticide. The purity of the product was between 80% and 85%. There was a certain gap with foreign products, which affected the foreign exchange earnings of the product. The main reason affecting product quality is that the content of sulfide impurities such as "tertiary mercaptan" in the product is too high. Importing production equipment and techniques from abroad requires a large amount of foreign exchange. Especially for some small and medium-sized enterprises, especially some private small and medium-sized enterprises, it is obviously beyond their ability to spend a lot of foreign exchange to intr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F9/165
CPCY02P20/10
Inventor 王爱彬刘大容
Owner 王爱彬
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