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A safe production process for large-scale production of high-purity phosphine trihydrogen

A phosphorous trihydride, safe production technology, applied in sustainable manufacturing/processing, chemical industry, phosphine, etc., to reduce the entry of impurities

Inactive Publication Date: 2016-02-10
李达刚 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008]Technical problem to be solved by the present invention: the purpose of the present invention is to provide a kind of safe method for large-scale production of high-purity phosphine trihydrogen in order to overcome the above deficiencies in the prior art The production process can not only produce high-purity phosphine trihydrogen products, but also can reliably eliminate the safety hazards in the surrounding environment of industrial production of phosphine trihydrogen, so that it can be continuously kept below the legally allowed concentration during the production process. In addition, it can also Eliminate equipment corrosion problems during preparation

Method used

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  • A safe production process for large-scale production of high-purity phosphine trihydrogen

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Embodiment 1

[0031] A safe production process for large-scale production of high-purity phosphine trihydrogen, using aluminum phosphide and deionized water as raw materials, under closed reaction conditions, using sealed solid feed, negative pressure three-stage series reactor reaction, low temperature and low pressure Capture and purification, tail gas oxidation to remove trivalent phosphorus, and lye and activated carbon to absorb phosphorus pentoxide. The specific realization of the process is as follows: figure 1 As shown, it is a flow chart of a safe production process for large-scale production of high-purity phosphine trihydrogen, including a hopper 1, a screw solid feeder 2, a first-stage reactor 3, a second-stage reactor 4, and a third-stage reactor 5. The first condensing reflux device 6, the second condensing reflux device 7, the low-temperature and low-pressure trapping purifier 8, the absorber 9, the vacuum pump 10 and the catalytic oxidizer 11; wherein the bottom of the hopper ...

Embodiment 2

[0076]The safety production process device of large-scale manufacture of high-purity phosphine trihydrogen in Example 1 is used to prepare phosphine trihydrogen, and the vacuum degree of the control three-stage series reactor is 100-200mmHg, wherein the first-stage reactor 3, the second-stage reaction The temperature of the reactor 4 is 40-45°C, the temperature of the third-stage reactor 5 is 25°C, and the operating condition of the low-temperature and low-pressure trapping purifier 8 is an operating pressure of 100-200mmHg; operating temperature: purifier: -50°C; receiver : -95°C; trap: -160°C, other control conditions are the same as in Example 1. The yield of solid phosphine trihydrogen trapped by the cryogenic trap is calculated by the same method as in Example 1: between 86-90% (weight).

Embodiment 3

[0078] Adopt the safety production process device of large-scale preparation of phosphine trihydrogen of embodiment 1 to prepare phosphine trihydrogen, control the vacuum degree of the three-stage series reactor to be 500-600mmHg, wherein the first-stage reactor 3, the second-stage reactor 4 The temperature is 45-55°C, the temperature of the third-stage reactor 5 is 25°C, and the operating condition of the low-temperature and low-pressure trapping purifier 8 is an operating pressure of 500-600mmHg; operating temperature: purifier: -55°C; receiver: - 100°C; trap: -155°C, other control conditions are the same as in Example 1. The yield of the solid-state phosphorus trihydride trapped by the cryogenic trap is calculated by the same method as in Example 1: between 88-91% (weight).

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Abstract

The invention discloses a safe production process for large-scale production of high-purity phosphine trihydrogen. Aluminum phosphide and deionized water or zinc phosphide and acetic acid are used as raw materials, and sealed solid feed is used under closed reaction conditions. , Negative pressure three-stage series reactor reaction, low-temperature and low-pressure capture and purification, tail gas oxidation to remove trivalent phosphorus, and lye and activated carbon to absorb phosphorus pentoxide, which can simultaneously meet the requirements of large-scale production from the laboratory to industrialization Industrial manufacturing, control of the highly toxic substance phosphine trihydrogen in the atmosphere of the production workshop and the surrounding environment is lower than the allowable concentration, the equipment has no corrosion problems that are difficult to overcome, and the four requirements of high product purity provide a safe and reliable production for industrial production. craft.

Description

technical field [0001] The present invention relates to a safe and reliable process for industrially manufacturing high-purity trihydrogen phosphine, in particular to provide a large-scale manufacturing of high-purity trihydrogen phosphine that can completely eliminate the potential safety hazards of the operation site and surrounding space for large-scale continuous manufacturing of phosphonane. Safe production process of phosphine hydride. Background technique [0002] Phosphonane, scientific name phosphorus trihydrogen, molecular formula: PH 3 Low boiling point (-132.5°C). Highly toxic, the specific gravity of the gaseous state is close to that of air, it is very easy to cause neurotoxicity in humans, and it is spontaneously combustible and explosive. This is the main ingredient of the will-o'-the-wisps that are common in cemeteries. The allowable concentration in the air is 0.2PPM. [0003] Phospanes are used in a wide variety of applications and are often used as a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/06
CPCY02P20/10
Inventor 李达刚李松
Owner 李达刚
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