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A kind of sodium hydrosulfide solution purification method

A purification method, sodium hydrosulfide technology, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of high iron content and poor reliability of sodium hydrosulfide, improve quality, shorten filtration time, easy to filter effects

Active Publication Date: 2018-07-13
SUZHOU BOYANG CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the sodium hydrosulfide sold in China generally has a high content of iron ions (above 100ppm), and such sodium hydrosulfide is used in electronics, semiconductors, precision electroplating industry, chemical fiber, medicine and other industries with poor reliability.
[0004] The present invention is to provide a new technology to solve the problem of high iron content of sodium hydrosulfide

Method used

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  • A kind of sodium hydrosulfide solution purification method
  • A kind of sodium hydrosulfide solution purification method
  • A kind of sodium hydrosulfide solution purification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] ①Dissolve sodium hydrosulfide in deionized water;

[0028] 2. Add 1wt% metal adsorbent (90wt% of trisodium thiocyanate and 10wt% of insoluble starch xanthate in the metal adsorbent) to the solution obtained in step 1., stir for 10min to separate out impurities;

[0029] ③The liquid obtained in step ② is filtered by a ceramic membrane double filter device lined with polypropylene resin;

[0030] ④ Dilute the solution obtained in step ③ with deionized water to the required concentration, and fill it.

[0031] The metal adsorbent can be eluted from the filter element of the ceramic membrane double filter device and regenerated for use, which is more environmentally friendly.

Embodiment 2-7

[0033] Repeat the method of Experimental Example 1 according to the mass percentage of each component specified in Table 1 to obtain different sodium hydrosulfide purified solutions.

[0034] Table 1:

[0035]

[0036] Trisodium thiocyanate was used as the metal adsorbent to repeat the obtained sodium hydrosulfide purified solution of the method of Example 1 as a control example, and the final iron ion concentration and filtration time of Examples 1-7 and the comparison example were detected and recorded.

[0037] Table 2:

[0038]

[0039]

[0040] Xanthate can make trisodium thiocyanate have better adsorption to iron ions, and can reduce the concentration of iron ions in the solution to below 10ppm, loosen the precipitates produced, significantly shorten the filtration time, and The frequency of filter cleaning is reduced, so it is generally better than the effect of trisodium thiocyanate metal adsorbent.

[0041] The ceramic membrane double filter device can be c...

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Abstract

Belonging to the technical field of purification treatment, the invention relates to a metal adsorbent and a sodium hydrosulfide solution purification method using the same. The metal adsorbent comprises 70-90wt% of a trithiocyanuric acid trisodium salt and the balance xanthate. The sodium hydrosulfide solution purification method using the metal adsorbent comprises the steps of: dissolving sodium hydrosulfide, adding a metal adsorbent to precipitate impurities, conducting double filtration, and carrying out dilution and filling. The metal adsorbent provided by the invention adopts a special formula and obviously reduces iron ions in the sodium hydrosulfide solution, improves the quality of the sodium hydrosulfide solution, shortens the filtration time, and is reproducible, thus being environment-friendly.

Description

technical field [0001] The invention relates to the technical field of purification treatment, in particular to a method for purifying sodium hydrosulfide solution. Background technique [0002] As a basic chemical raw material, sodium hydrosulfide is a necessity for the national economy and the people's livelihood. It is mainly used as a raw material for the semi-finished product of pesticide acetic alcohol used in the preparation of ammonium sulfide. It is widely used in the flotation of copper ore in the mining industry. Wool and leather tanning; used in the chemical fertilizer industry to remove monomer sulfur in activated carbon desulfurizers, used in man-made fiber production for sulfurous acid dyeing, used in the dye industry for the synthesis of organic intermediates and as an aid in the preparation of sulfur dyes It is used in the pharmaceutical industry to synthesize drugs such as cardiovascular drugs. With the vigorous development of my country's dye industry, le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22C01B17/32C01B17/36
CPCB01J20/22B01J2220/44C01B17/32C01B17/36
Inventor 严增源
Owner SUZHOU BOYANG CHEM
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