CN102115153A - Method for preparing mercuric sulfate and sodium chloride by using mercury-containing dead catalyst - Google Patents
Method for preparing mercuric sulfate and sodium chloride by using mercury-containing dead catalyst Download PDFInfo
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- CN102115153A CN102115153A CN 201010608124 CN201010608124A CN102115153A CN 102115153 A CN102115153 A CN 102115153A CN 201010608124 CN201010608124 CN 201010608124 CN 201010608124 A CN201010608124 A CN 201010608124A CN 102115153 A CN102115153 A CN 102115153A
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Abstract
The invention discloses a method for preparing mercuric sulfate and sodium chloride by using a mercury-containing dead catalyst, relating to the technical field of treatment and utilization of three wastes of the dead mercury catalyst in the organic industry. The method comprises the following steps of: firstly, conveying the dead mercury catalyst into a sealed distiller for distilling to ensure that mercuric chloride directly sublimates into gas and is then cooled into liquid mercuric chloride; secondly, reacting the obtained mercuric chloride solution with a sodium sulfate solution to generate a mixed solution of sodium sulfate and sodium chloride; thirdly, performing suction filtration on the mixed solution in an enclosed state to obtain a mercuric sulfate filter cake, washing, dehydrating, smashing and packing to obtain a mercuric sulfate product; fourthly, conveying the obtained sodium chloride solution into an enclosed normal-pressure distiller for distilling, and discharging a saturated sodium chloride solution into a cooler when the distillation temperature reaches a degree that the sodium chloride solution is saturated; and lastly, cooling and crystallizing to obtain a sodium chloride crystal product. By adopting the method, environmental pollution caused by the dead mercury catalyst can be effectively prevented, and higher economic benefit is achieved.
Description
Technical field
The present invention relates to the disposal of three wastes of the useless mercury catalyst of organic industry and the technical field of utilization, especially a kind of mercurous spent catalyst prepares the method for Mercury bisulfate and sodium-chlor.
Background technology
In the reaction with the acetylene method synthesizing chloroethylene, industrial what use is the high mercury catalyst of mercury chloride content as 10wt% and since mercury chloride in reaction is carried out easily distillation run off, can work the mischief to environment.People improve at the mercury catalyst that the method for seeking is used the acetylene method synthesizing chloroethylene, attempt to develop a kind of low mercury or non-mercury catalyst, make it under higher transformation efficiency and selectivity, the long life-span is arranged, and the harm to environment reaches minimum, for the industrial applications of later on low mercury or non-mercury catalyst is laid a good foundation.By practice prepared a kind of on transformation efficiency, selectivity still are work-ing life all reasonable catalyzer mercury chloride, its transformation efficiency has reached 97%, selectivity has reached 98%, and mercury content is lower, belongs to a kind of more promising catalyzer.But adopt this mercuric chleride catalyst, in the reaction with the acetylene method synthesizing chloroethylene, the quantity discharged of mercurous spent catalyst is 0.002 ton of product discharging per ton, and useless mercury (mercury chloride) content of discharge is 2-7%;
One, reacted useless mercury not only effectively do not utilize, and can cause secondary pollution;
Two, mercury chloride can be used to produce various mercurous products and other materials, its using value height, and such as making Mercury bisulfate, Mercury bisulfate can be used for making calomel, mercuric chloride and secondary battery, and is used as the catalyzer of ethylene hydration system acetaldehyde.
Summary of the invention
The mercurous spent catalyst that the present invention is intended to produce in the reaction to the acetylene method synthesizing chloroethylene carries out the comprehensive regulation, provides a kind of mercurous spent catalyst to prepare the method for Mercury bisulfate and sodium-chlor.
For achieving the above object, the technical solution used in the present invention is as follows:
The mercury catalyst that will give up makes Mercury bisulfate and sodium-chlor through following three steps:
The first step, the mercury catalyst that will give up is sent in the sealed distiller and is distilled, and starts power supply and heats to 300-304 degree centigrade and make mercury chloride be directly sublimed into gas, is cooled to the mercury chloride of liquid again;
Second step, above-mentioned mercuric chloride solution that obtains and metabisulfite solution are reacted with pure mass ratio 1:0.34-0.74, generate Mercury bisulfate and sodium-chlor mixing solutions; Obtain the filter cake Mercury bisulfate through closed suction filtration then, through washing, dewater, be packaged to be the Mercury bisulfate product; Clarifying sodium chloride solution carries out next step processing;
The 3rd goes on foot, and the above-mentioned sodium chloride solution that obtains is sent in the sealed air distillation device distilled, and enters water cooler when distillation temperature reaches sodium chloride saturated solution; Obtain the sodium chloride crystal product through cooling, crystallization.
Main chemical reactions formula of the present invention is:
HgCl
2?+Na
2SO
4====?HgSO
4+?2NaCl
Beneficial effect of the present invention is: one, and the mercury catalyst that will give up fully utilizes, and has effectively prevented the pollution of useless mercury catalyst to sublimity; Its two, Mercury bisulfate of producing and sodium-chlor product serve many purposes, economic benefit is considerable.
Embodiment
Embodiment one
The mercury catalyst that will give up makes Mercury bisulfate and sodium-chlor through following three steps:
The first step is sent into the useless mercury catalyst of 500Kg in the sealed distiller and to be distilled, and starts power supply and heats to 300-304 degree centigrade and make mercury chloride be directly sublimed into gas, is cooled to the mercury chloride of liquid again;
Second step, above-mentioned mercuric chloride solution that obtains and metabisulfite solution are reacted with pure mass ratio 1:0.34, generate Mercury bisulfate and sodium-chlor mixing solutions; Obtain the filter cake Mercury bisulfate through closed suction filtration then, through washing, dewater, be packaged to be Mercury bisulfate product 40.4Kg; Clarifying sodium chloride solution carries out next step processing;
The 3rd goes on foot, and the above-mentioned sodium chloride solution that obtains is sent in the sealed air distillation device distilled, and enters water cooler when distillation temperature reaches sodium chloride saturated solution; Obtain sodium chloride crystal product 26.1Kg through cooling, crystallization.
Embodiment two
The mercury catalyst that will give up makes Mercury bisulfate and sodium-chlor through following three steps:
The first step is sent into the useless mercury catalyst of 500Kg in the sealed distiller and to be distilled, and starts power supply and heats to 300-304 degree centigrade and make mercury chloride be directly sublimed into gas, is cooled to the mercury chloride of liquid again;
Second step, above-mentioned mercuric chloride solution that obtains and metabisulfite solution are reacted with pure mass ratio 1:0.54, generate Mercury bisulfate and sodium-chlor mixing solutions; Obtain the filter cake Mercury bisulfate through closed suction filtration then, through washing, dewater, be packaged to be Mercury bisulfate product 55.3Kg; Clarifying sodium chloride solution carries out next step processing;
The 3rd goes on foot, and the above-mentioned sodium chloride solution that obtains is sent in the sealed air distillation device distilled, and enters water cooler when distillation temperature reaches sodium chloride saturated solution; Obtain sodium chloride crystal product 35.8Kg through cooling, crystallization.
Embodiment three
The mercury catalyst that will give up makes Mercury bisulfate and sodium-chlor through following three steps:
The first step is sent into the useless mercury catalyst of 500Kg in the sealed distiller and to be distilled, and starts power supply and heats to 300-304 degree centigrade and make mercury chloride be directly sublimed into gas, is cooled to the mercury chloride of liquid again;
Second step, above-mentioned mercuric chloride solution that obtains and metabisulfite solution are reacted with pure mass ratio 1:0.74, generate Mercury bisulfate and sodium-chlor mixing solutions; Obtain the filter cake Mercury bisulfate through closed suction filtration then, through washing, dewater, be packaged to be Mercury bisulfate product 70.3Kg; Clarifying sodium chloride solution carries out next step processing;
The 3rd goes on foot, and the above-mentioned sodium chloride solution that obtains is sent in the sealed air distillation device distilled, and enters water cooler when distillation temperature reaches sodium chloride saturated solution; Obtain sodium chloride crystal product 45.5Kg through cooling, crystallization.
Claims (1)
1. mercurous spent catalyst prepares the method for Mercury bisulfate and sodium-chlor, it is characterized in that: the mercury catalyst that will give up makes Mercury bisulfate and sodium-chlor through following three steps:
The first step, the mercury catalyst that will give up is sent in the sealed distiller and is distilled, and starts power supply and heats to 300-304 degree centigrade and make mercury chloride be directly sublimed into gas, is cooled to the mercury chloride of liquid again;
Second step, above-mentioned mercuric chloride solution that obtains and metabisulfite solution are reacted with pure mass ratio 1:0.34-0.74, generate Mercury bisulfate and sodium-chlor mixing solutions; Obtain the filter cake Mercury bisulfate through closed suction filtration then, through washing, dewater, be packaged to be the Mercury bisulfate product; Clarifying sodium chloride solution carries out next step processing;
The 3rd goes on foot, and the above-mentioned sodium chloride solution that obtains is sent in the sealed air distillation device distilled, and enters water cooler when distillation temperature reaches sodium chloride saturated solution; Obtain the sodium chloride crystal product through cooling, crystallization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010608124 CN102115153A (en) | 2010-12-28 | 2010-12-28 | Method for preparing mercuric sulfate and sodium chloride by using mercury-containing dead catalyst |
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| CN 201010608124 CN102115153A (en) | 2010-12-28 | 2010-12-28 | Method for preparing mercuric sulfate and sodium chloride by using mercury-containing dead catalyst |
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| CN102115153A true CN102115153A (en) | 2011-07-06 |
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| CN 201010608124 Pending CN102115153A (en) | 2010-12-28 | 2010-12-28 | Method for preparing mercuric sulfate and sodium chloride by using mercury-containing dead catalyst |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1777466A (en) * | 2003-05-01 | 2006-05-24 | 加利福尼亚大学董事会 | Method and apparatus for mitigating mercury emissions in exhaust gases |
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2010
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1777466A (en) * | 2003-05-01 | 2006-05-24 | 加利福尼亚大学董事会 | Method and apparatus for mitigating mercury emissions in exhaust gases |
Non-Patent Citations (2)
| Title |
|---|
| 《化学化工大辞典上》 20030131 《化学化工大辞典》编委会等 硫酸汞 第1500页 1 , * |
| 《无机盐工业手册(第二版)上册》 19960131 天津化工研究院等 氯化汞 第578页 1 , * |
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Application publication date: 20110706 |