Raw material recovery technology in sulfur tetrafluoride production

A technology of sulfur tetrafluoride and raw materials, which is applied in the field of raw material recovery technology in the production of sulfur tetrafluoride, can solve problems such as low recovery rate, low fluorine utilization rate, and high impurity content, so as to achieve pure recovery of raw materials and increase recovery rate , Improve the effect of purification

Inactive Publication Date: 2019-08-02
绵阳华鑫瑞建筑劳务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Abroad, the United States uses alkali metal fluoride and sulfur to react to synthesize sulfur tetrafluoride; the United States also uses fluorine gas and sulfur to directly react to generate sulfur tetrafluoride (SF4): which contains sulfur hexafluoride (SF6), sulfur difluoride ( SF2), and impurities such as decafluorooxydisulfide (S20F10) with high toxicity; the utilization rate of fluorine is low, the impurity content is high, the leaching and purification treatment is difficult, the recovery rate is low, and the waste is large
[0003] At present, most of the raw material r

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A raw material recovery process in the production of sulfur tetrafluoride, comprising the following steps:

[0039] 1) Protective measures before the preparation of sulfur tetrafluoride:

[0040] Wear gas masks, safety glasses, cloth gas suits and chemical-resistant gloves;

[0041] 2) Preparation of sulfur tetrafluoride:

[0042] Prepare the instruments and materials for the production of sulfur tetrafluoride;

[0043] 3) Pre-preparation of sulfur tetrafluoride:

[0044] 425 g (11 moles) of finely divided sodium fluoride and 1 liter of dry acetonitrile were placed in a flask, and 525 g (3330 ml, 6 moles) of distilled sulfur dichloride (boiling point at 130 mm (20-25°C) was added dropwise to the stirring slurry with an initial temperature of 25°C within half an hour, and the temperature rose to about 42°C automatically during the dropping process. A small amount of product can be collected in the container;

[0045] 4) Preparation of sulfur tetrafluoride:

[0046]...

Embodiment 2

[0062] A raw material recovery process in the production of sulfur tetrafluoride, comprising the following steps:

[0063] 1) Protective measures before the preparation of sulfur tetrafluoride:

[0064] Wear gas masks, safety glasses, cloth gas suits and chemical-resistant gloves;

[0065] 2) Preparation of sulfur tetrafluoride:

[0066] Prepare the instruments and materials for the production of sulfur tetrafluoride;

[0067] 3) Pre-preparation of sulfur tetrafluoride:

[0068] 425 g (11 moles) of finely divided sodium fluoride and 1 liter of dry acetonitrile were placed in a flask, and 525 g (3330 ml, 6 moles) of distilled sulfur dichloride (boiling point at 130 mm (20-25°C) was added dropwise to the stirring slurry with an initial temperature of 25°C within half an hour, and the temperature rose to about 42°C automatically during the dropping process. A small amount of product can be collected in the container;

[0069] 4) Preparation of sulfur tetrafluoride:

[0070]...

Embodiment 3

[0086] A raw material recovery process in the production of sulfur tetrafluoride, comprising the following steps:

[0087] 1) Protective measures before the preparation of sulfur tetrafluoride:

[0088] Wear gas masks, safety glasses, cloth gas suits and chemical-resistant gloves;

[0089] 2) Preparation of sulfur tetrafluoride:

[0090] Prepare the instruments and materials for the production of sulfur tetrafluoride;

[0091] 3) Pre-preparation of sulfur tetrafluoride:

[0092] 425 g (11 moles) of finely divided sodium fluoride and 1 liter of dry acetonitrile were placed in a flask, and 525 g (3330 ml, 6 moles) of distilled sulfur dichloride (boiling point at 130 mm (20-25°C) was added dropwise to the stirring slurry with an initial temperature of 25°C within half an hour, and the temperature rose to about 42°C automatically during the dropping process. A small amount of product can be collected in the container;

[0093] 4) Preparation of sulfur tetrafluoride:

[0094]...

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PUM

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Abstract

The invention discloses a raw material recovery technology in sulfur tetrafluoride production, and relates to the technical field of production of fluorine chemical products. The raw material recoverytechnology in the sulfur tetrafluoride production comprises following steps: protective measures before preparation of sulfur tetrafluoride, preparation work of sulfur tetrafluoride, pre-preparationof sulfur tetrafluoride, preparation of sulfur tetrafluoride, standby work after product preparation, primary fractional distillation of sulfur tetrafluoride, secondary fractional distillation of sulfur tetrafluoride, capturing of sulfur tetrafluoride, tail gas treatment of product preparation, recovery of product raw materials and detection of product raw materials. According to the technology, sulfur tetrafluoride is subjected to fractional distillation two times firstly, crude sulfur tetrafluoride can be effectively changed into primary sulfur tetrafluoride, needless impurities are removedby one step, then impurities in tail gas can be effectively removed, a processing instrument is effectively cleaned, so that degree of purification of sulfur tetrafluoride by the instrument is increased, and the raw material recovery rate of sulfur tetrafluoride is further increased.

Description

technical field [0001] The invention relates to the technical field of production of fluorine chemical products, in particular to a raw material recovery process in the production of sulfur tetrafluoride. Background technique [0002] Abroad, the United States uses alkali metal fluoride and sulfur to react to synthesize sulfur tetrafluoride; the United States also uses fluorine gas and sulfur to directly react to generate sulfur tetrafluoride (SF4): which contains sulfur hexafluoride (SF6), sulfur difluoride ( SF2), and impurities such as decafluorooxydisulfide (S20F10) with high toxicity; the utilization rate of fluorine is low, the impurity content is high, the leaching and purification treatment is difficult, the recovery rate is low, and the waste is large. [0003] At present, most of the raw material recovery processes in the production of sulfur tetrafluoride in the domestic market are too simplistic, especially the purification of sulfur tetrafluoride in the existing...

Claims

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Application Information

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IPC IPC(8): C01B17/45
CPCC01B17/4523
Inventor 杨建军
Owner 绵阳华鑫瑞建筑劳务有限公司
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