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Preparation method of deiodination agent

A technology for deiodination and silver carbonate, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, cation exchange, etc., can solve problems such as wastewater generation

Active Publication Date: 2013-04-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is the problem of producing waste water in the preparation method of silver-containing macroporous strong-acid cation exchange resin or silver-containing hydrogen molecular sieve existing in the prior art, providing a kind of preparation of deiodination agent method, the method has the characteristics of no waste water

Method used

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  • Preparation method of deiodination agent
  • Preparation method of deiodination agent
  • Preparation method of deiodination agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 1000 ml and 14.2 g of silver carbonate (Ag 2 CO 3 ) powder, stirred to Ag 2 CO 3 The powder is dispersed evenly, and hydrogen-type CT145 cation exchange resin equivalent to 100 grams of dry weight is added, and then carbon dioxide gas (CO 2 ) 50 grams, maintain the temperature in the reactor at 30° C. and stir for 8 hours, slowly vent the pressure in the reactor to return to normal pressure, filter to obtain the deiodination agent, and produce 980 milliliters of filtrate. It should be emphasized that the filtration preparation process is not washed with water, and as [Example 2] proves, the water phase generated by filtration can be completely recycled, so there is no need to discharge waste water.

[0026] After testing, the silver content of the deiodination agent is 9.89%, and the iodine content in the effluent acetic acid is 4.8ppb after 4 hours of evaluation of the deiodination effect. The deiodination effect of the deiodination agent is equivalent to [Comp...

Embodiment 2

[0029] 980 milliliters of filtrates obtained after separating the deiodination agent in [Example 1] add 20 milliliters of water to make the liquid total amount reach 1000 milliliters and replace 1000 milliliters of water in [Example 1] as 1 cycle water and carry out 1 of the deiodination agent In the second cycle preparation experiment, the filtrate obtained in the first cycle test was also added to 1000 ml as the second cycle water to replace the water in [Example 1], and in this way until the 10th cycle preparation experiment was carried out. Other conditions in the cyclic preparation experiment were the same as in [Example 1]. This example is the result of the 10th cyclic preparation experiment.

[0030] For the convenience of comparison, the important experimental conditions and results are listed in Table 1 and Table 2. Compared with the results of [Example 1], it can be seen that the filtrate produced in the preparation process is circulated for the preparation without a...

Embodiment 3

[0031] [Example 3] to [Example 8]

[0032] Except that the particle diameter of silver carbonate, the consumption of silver carbonate, the kind of hydrogen type strongly acidic cation exchange resin, the consumption of carbon dioxide, temperature in the still and reaction time may change, other operations are all the same as [embodiment 1]. For the convenience of comparison, the important experimental conditions and results are listed in Table 1 and Table 2. As demonstrated in [Example 2], the water phase obtained by filtration in [Example 3] to [Example 8] can also be recycled completely without discharging waste water.

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Abstract

The invention relates to a preparation method of a deiodination agent and mainly solves the problem of wastewater existing in the preparation method of a silver-containing strong acid cation exchange resin or silver-containing molecular sieve in the prior art. According to the invention, the hydrogen strong acid macroporous cation exchange resin or hydrogen molecular sieve is dipped into an aqueous dispersion of a silver compound for ion exchange reaction, the silver-containing compound is silver carbonate and carbon dioxide is used in the ion exchange reaction process. The technical scheme greatly solves the problem and can be used in the industrial production of the deiodination agent.

Description

technical field [0001] The invention relates to a preparation method of a deiodination agent, in particular to a preparation method of a silver-containing macroporous strong-acid cation exchange resin or a silver-containing molecular sieve. Background technique [0002] Acetic acid is an important chemical raw material in the chemical industry. There are two main types of industrial production of acetic acid, one is the ethylene oxidation route, and the other is the methanol carbonylation route. Because the latter has the advantages of low production cost and methanol can come from non-petroleum routes, the methanol carbonylation route has now become a The main source of acetic acid for industrial use. But methanol carbonylation route needs to adopt iodide such as methyl iodide as catalyzer, and iodine can poison many industrial catalysts (such as the palladium / gold / potassium catalyst in the ethylene oxidation method to produce vinyl acetate process), need to carry out acet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J39/14B01J39/18C07C53/08C07C51/47
Inventor 张士福杨运信张丽斌姚喆宋朝红
Owner CHINA PETROLEUM & CHEM CORP
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