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Vacuum filter used for removing impurities in process of producing ethylene glycol antimony

A production process, ethylene glycol antimony technology, applied in chemical instruments and methods, separation/purification of hydroxyl compounds, separation methods, etc., can solve the problem that the adsorption and decolorization layer is prone to filtration or leakage, frequent replacement of filter layers, and filtration. Slow speed and other problems, to achieve the effect of good impurity removal, easy operation and short filtration time

Inactive Publication Date: 2017-05-31
锡矿山闪星锑业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, some residual elemental impurities will also pollute the environment
[0003] CN 202427251 U discloses a film-coated composite filter, which can be used for filtering and removing impurities in the production of ethylene glycol antimony. Its main disadvantages are: the filtering speed is slow, and the filter layer is frequently replaced
This is because when the filter is in operation, the filtrate passes through the filter holes of the inner cylinder, the adsorption decolorization layer and the stainless steel mesh sleeve in sequence. Since the adsorption decolorization layer and the stainless steel mesh sleeve cannot bear the filtration pressure of 0.065-0.085MPa, this structure makes the adsorption decolorization The layer is prone to percolation or leakage under negative pressure suction

Method used

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  • Vacuum filter used for removing impurities in process of producing ethylene glycol antimony
  • Vacuum filter used for removing impurities in process of producing ethylene glycol antimony

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] like figure 1 , 2 As shown, a vacuum filter used for removing impurities in the production process of ethylene glycol antimony is composed of a cylindrical vacuum filter cartridge 1 and a filter layer 2 made of stainless steel. The interface radius of the vacuum filter is 0.20m, and the vacuum negative pressure 60kPa; wherein, the vacuum filter cartridge 1 is composed of an upper feed port 11, a lower discharge port 12 and a cylinder body 13; the filter layer 2 is sequentially composed of two layers of pitch-based carbon felt 21, 50 mesh stainless steel screen mesh 22 and a perforated plate 23 with a filter hole diameter of 9mm and a porosity of 10%; The pitch-based carbon felt 21 and the stainless steel screen 22 are clamped tightly on the punching plate 23; each layer of the pitch-based carbon felt 21 is 4mm thick and has a specific surface area of ​​1800m 2 / g.

[0026] The working process of the present embodiment vacuum filter is: the 1m 3 The mixed solution af...

Embodiment 2

[0029] like figure 1 , 2 As shown, a vacuum filter used for removing impurities in the production process of ethylene glycol antimony is composed of a stainless steel cylindrical vacuum filter cartridge 1 and a filter layer 2. The interface radius of the vacuum filter is 0.22m, and the vacuum negative pressure It is 50kPa; Wherein, described vacuum filter cartridge 1 is made up of three parts of upper part feed port 11, lower part discharge port 12 and cylinder body 13; Described filter layer 2 is successively made of 4 layers of phenolic base carbon felt 21, 150-mesh stainless steel screen 22 and a perforated plate 23 with a filter hole of 8mm and an opening rate of 25%; The surroundings of base carbon felt 21 and stainless steel mesh 22 are fastened on punching plate 23; each layer of described phenolic base carbon felt 21 is 3mm thick, and specific surface area is 1200m 2 / g.

[0030] The working process of the present embodiment vacuum filter is: the 1m 3 The mixed sol...

Embodiment 3

[0033] like figure 1 , 2 As shown, a vacuum filter used for removing impurities in the production process of ethylene glycol antimony is composed of a stainless steel cylindrical vacuum filter cartridge 1 and a filter layer 2. The interface radius of the vacuum filter is 0.28m, and the vacuum negative pressure It is 70kPa; Wherein, described vacuum filter cartridge 1 is made up of three parts of upper part feed port 11, lower part discharge port 12 and cylinder body 13; Described filter layer 2 is successively made up of 6 layers of phenolic base carbon felt 21, The 350-mesh stainless steel screen 22 and the perforated plate 23 with a filter hole of 6mm and an opening rate of 40% are composed of the perforated plate 23; The surroundings of base carbon felt 21 and stainless steel screen mesh 22 are fastened on punching plate 23; each layer of described phenolic base carbon felt 21 is thick 2mm, and specific surface area is 2500m 2 / g.

[0034] The working process of the pres...

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Abstract

The invention discloses a vacuum filter used for removing impurities in a process of producing ethylene glycol antimony. The vacuum filter is composed of a vacuum filter barrel and a filter layer, wherein the vacuum filter barrel consists of an upper charge hole, a lower discharge hole and a barrel body; the filter layer consists of a carbon fiber felt, a stainless steel screen and a punching plate from top to bottom in sequence; the punching plate is fixedly arranged on the middle part of the vacuum filter barrel; and the periphery of the carbon fiber felt and the stainless steel screen is clamped onto the punching plate through an environment-friendly sealing ring. The whiteness average value of a product obtained by removing the impurities through the filter is increased to 93%, the b*average value of the product is reduced to 1.1 and the black point average value of the product is increased to 100%, so that the filtration and impurity-removal effect is good. The filter only needs 10-20 minutes for filtering 1m<3> of filtrate. The vacuum filter is reasonable in structure, is simple and convenient to operate, and does not easily generate leakage filtration or penetration filtration; and the filter layer can be repeatedly used, so that the whole filter process is environmentally friendly.

Description

technical field [0001] The invention relates to a vacuum filter, in particular to a vacuum filter used for impurity removal in the production process of ethylene glycol antimony. Background technique [0002] Ethylene glycol antimony is white or blue-white crystalline particles, non-toxic and tasteless, soluble in ethylene glycol. Ethylene glycol antimony is the most novel catalyst used in polyester polycondensation reaction. The catalytic activity of ethylene glycol antimony is mainly determined by its chemical index and physical index. In the production process of ethylene glycol antimony, the elemental impurities in the raw material have an impact on the physical indexes of the ethylene glycol antimony product—whiteness, b * value (the value of the color difference level detected by the colorimeter, the lower the value, the better the quality), and the black point has a great influence. The relationship between impurity elements and product indicators in ethylene glycol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D15/22C07C31/28C07C29/76
CPCB01D15/22C07C29/76C07C31/28
Inventor 吴少华刘华美袁辉星曾涛姜精哲
Owner 锡矿山闪星锑业有限责任公司
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