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Rectifying tower filler for dry-method separation of hydrogen chloride and preparation method of rectifying tower filler

A rectification tower and hydrogen chloride technology, applied in the field of separation, can solve the problems of stainless steel fillers being easily corroded, troublesome to handle, difficult to achieve the effect of product separation, etc., and achieve the goals of reducing fluoride ion content, increasing production capacity, improving adsorption performance and separation efficiency Effect

Active Publication Date: 2022-02-15
LINHAI LIMIN CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polypropylene packing is more troublesome to handle when it is replaced in a cycle; and stainless steel packing is easy to corrode when the humidity is high
Moreover, it is sometimes difficult for the two to achieve the effect of product separation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0014] Preparation of fluororesin

[0015] Preparation of fluorine-containing hydroxyl acrylic resin

[0016] Refer to Zhao Zhen, "Synthesis of High-Solid Fluorinated Hydroxyl Acrylic Resin", Wuhan Engineering University Master's Thesis, 2015, 15-page synthetic method. Add 24 grams of xylene and 16 grams of butyl acetate into a four-necked flask, and heat to 20°C. Then 40 grams of methacrylic acid, 25 grams of n-butyl acrylate, 10 grams of methacrylic acid, 43 grams of 2-hydroxyethyl methacrylate, 22 grams of vinyl tertiary carbonate, 8 grams of ethyl methacrylate acetoacetate, Add 15% to 20% of the mixture of 52 grams of dodecafluoroheptyl methacrylate and 4 grams of mercaptoethanol dropwise into a four-neck flask, and keep warm at 20°C for half an hour. Slowly add the remaining mixed solution dropwise again, and the dropwise addition is completed within 3 hours. After heating to reflux for 1 hour, add 8 grams of tert-butyl peroxybenzoate, continue the reaction until the c...

Embodiment 1

[0023] Modification of stainless steel filler with fluorine-containing hydroxyacrylate resin

[0024] Immerse the stainless steel wire helical coil filling material in the fluorine-containing hydroxyacrylate resin obtained above, stir to make the surface evenly coated with fluorine-containing hydroxyacrylate resin, take it out into another heatable container, add the fluorine-containing hydroxyacrylate resin coated Fluorine-containing hydroxyacrylate resin stainless steel wire helical coil filling material 40% of the total weight of hexamethylene diisocyanate, stirring, curing at room temperature for half an hour, and baking in an oven at 110°C for half an hour.

Embodiment 2

[0026] Modification of stainless steel filler with bisphenol fluorine-containing epoxy resin

[0027] Immerse the stainless steel wire helical coil filling material in bisphenol fluorine-containing epoxy resin, stir to make the surface evenly coated with bisphenol fluorine-containing epoxy resin, take it out into another container, add the resin coated with bisphenol Fluorine-containing epoxy resin stainless steel wire helical ring filling material 20% of the total weight of tetraethylenepentamine, stir evenly, cure at room temperature for half an hour, and bake in an oven at 110°C for half an hour.

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PUM

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Abstract

The invention discloses a rectifying tower filler for dry-method separation of hydrogen chloride and a preparation method of the rectifying tower filler, wherein the rectifying tower filler is a polypropylene filler or a stainless steel filler which is impregnated and cured by a surface treating agent, and the surface treating agent is fluororesin. According to the method, the surface of existing tower filler is modified by using the fluororesin under the action of hydrogen bonds, so that the adsorption performance and the separation efficiency of the surface of the original tower filler are improved, the purity of hydrogen fluoride in a product is improved, and the content of fluorine ions is greatly reduced.

Description

technical field [0001] The invention relates to a separation technology, in particular to a rectifying column packing used for dry separation of hydrogen chloride and a preparation method thereof. Background technique [0002] In the field of fluorine chemical industry for the production of refrigerants and fire extinguishing agents, fluorocarbon products are mainly produced by the fluorine-chlorine exchange reaction of hydrogen fluoride in the presence of fluorination catalysts with chlorocarbon compounds. However, in the process of generating fluorinated alkanes, in addition to the main fluorinated products, a large amount of hydrogen chloride, a small amount of by-products of chlorofluoroalkanes and polyfluoroalkanes, and a small amount of entrained hydrogen fluoride can also be produced. Therefore, people invented the dry distillation separation technology, which does not require alkali washing and water washing during the separation process, and the entire process equip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J19/30B01D3/14C01B7/07
CPCB01J19/30B01D3/14C01B7/0712
Inventor 何建明裴文陈盛君
Owner LINHAI LIMIN CHEM
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