CN101810991B - Method for preparing chlorine trapping and eliminating powder - Google Patents
Method for preparing chlorine trapping and eliminating powder Download PDFInfo
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- CN101810991B CN101810991B CN201010149353XA CN201010149353A CN101810991B CN 101810991 B CN101810991 B CN 101810991B CN 201010149353X A CN201010149353X A CN 201010149353XA CN 201010149353 A CN201010149353 A CN 201010149353A CN 101810991 B CN101810991 B CN 101810991B
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- chlorine
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Abstract
The invention discloses a method for preparing chlorine trapping and eliminating powder, which comprises the following steps: adding 80 to 95 percent of sodium thiosulfate solid, 1 to 5 percent of magnesium stearate, 1 to 5 percent of sodium dodecyl benzene sulfonate and 3 to 10 percent of sodium silicate into a crusher in a mass ratio and crushing the components, then crushing the components for 10 seconds at a high speed of 20,000 r/min, and screening the powder with 400 meshes to obtain the chlorine trapping and eliminating powder. The magnesium stearate adopted as a drying agent can effectively prevent the powder from absorbing moisture to cause caking; the sodium dodecyl benzene sulfonate adopted as a surfactant changes the liquidity and bulk density of the sodium thiosulfate powder, and can prevent the agglomeration phenomenon of the powder due to small granularity; and because the sodium silicate is adopted as an ionic dispersant, the anionic group SiO32- of the sodium silicate can increase Zeta potential on the surfaces of granules, and improves the electrostatic repulsive force effect so that agglomeration is not easy to cause among the granules and the dispersion degree of the powder is increased. The method has simple process; and the chlorine trapping and eliminating powder has good liquidity and bulk density, and also can produce certain physical adsorption with chlorine so as to achieve good chlorine removing effect. The chlorine adsorption amount is more than or equal to 0.23 g/g.
Description
Technical field
The present invention relates to a kind of preparation method of chlorine trapping and eliminating powder, in particular for the preparation method of a kind of chlorine trapping and eliminating powder of chlorine leakage accident generation emergency disposal.
Background technology
Chlorine is important chemical material, is used to make intermediate, solvent, hydrochloric acid, the bleaching powder of organic synthesis in a large number and makes medicine and agricultural chemicals; When synthetic materials such as production plastic polyvinyl chloride, synthetic fibers polyvinyl chloride fibre, synthetic rubber neoprene and chlorinated rubber, also need use volume chlorine, also be used for the preparation of chloride and chlorate.Be pressed into the bleaching of the normal paper supply slurry of steel cylinder, textile bleaching, disinfection of tap water sterilization, system clorox behind the chlorine gas liquefaction, from bittern, refine the purification smelting of bromine and iodine and some metal or silicon etc.
Chlorine is the hypertoxic gas that is pistac under a kind of normal temperature, has penetrating odor, can damage whole body organ and system, and chlorine proportion is slightly heavier than air, if there is not wind-force effect meeting to hide for a long time at low-lying position.And liquid chlorine is a chlorine pressurization back liquefaction gained, pressure store is bigger, the chemical activity of chlorine in addition, so chlorine must be with the highly dense encapsulation of special air accumulator, but the accidents such as leakage of liquid chlorine in production, storage and transportation still often has generation, the chlorine leakage accident have sudden strong, diffusion rapidly, damaging range is wide, the injury approach is many.According to incompletely statistics, since in November, 2003, the whole nation takes place surplus the chlorine accident 10, and west, Zhejiang on November 3rd, 2003 sun the liquid chlorine cylinder explosion accident takes place causes 1 people's death, and 71 people poison; The people poisoned surplus the chlorine that waste and old chlorine cylinder discharges in Dazu County, Sichuan on the 3rd November in 2003 caused 30, wherein 5 people's severe intoxications; The chlorine leakage accident takes place and causes the 48 people hospitalization of poisoning in east wind paper mill, Hubei on November 6 in 2003, and 5 people are in a bad way; On November 28th, 2003, chemical plant, Shanghai International Automobile City Tourist Festival district liquid chlorine cylinder valve damages and causes 59 people to poison in hospital; The liquefied chlorine cistern car leakage accident takes place and causes 2.4 ten thousand people to evacuate in Yancheng county, Henan on the 13rd January in 2004; Qiqihaer City's generation on January 15th, 2004 chlorine cylinder leakage accident causes 14 people to stay institute to treat 2018 people and evacuates; Huaian, 6 o'clock Beijing-Shanghai expressways in evening March 29 in 2005 section liquid chlorine large tracts of land is leaked and is caused 28 people's death, evacuates nearly 10,000 people of villager.The chlorine leakage explosion accident of the former chemical general factory in sky, Chongqing on the 16th April in 2004 causes 9 people's death, ten thousand people's emergency evacuations surplus in the of 15 on every side.
Chlorine leakage or blast are accident, and especially mobile chlorine source seems more dangerous because of having numerous uncertain factors such as time, place and surrounding environment.Existing chlorine leaks that to handle Disposal Measures mainly be alkaline matter to be formulated as certain density solution catch and disappear, the most commonly used is NaOH, calcium hydroxide, sodium sulfite and sodium thiosulfate etc., wherein NaOH is very big to the harmfulness of human body, and the high more harmfulness of concentration is big more.Splash on the skin, can cause skin burn, be splashed into intraocular and can cause blindly, and absorb product clorox behind the chlorine and meet light and easily decompose, also can discharge chlorine and cause secondary pollution, sodium sulfite also will use with NaOH together to the uptake of chlorine is little.The Beijing City Inst. of Labour Safety Science is to being that raw material adopts wet method to prepare chlorine arresting agent to have carried out correlative study with calcium oxide and calcium hydroxide; publication number is that disclosing a kind of in the patent application of CN1070589A is the chlorine arresting agent of raw material with quick lime; by being added in the aqueous slkali at a certain temperature of bulk stirred; add an amount of anti-blushing agent simultaneously; control temperature behind the auxiliary agents such as dispersant; time and mixing speed are treated the laggard capable sedimentation of quicklime slaking; concentrate; filter; dry; pulverize; operations such as screening obtain chlorine arresting agent; but the easy moisture absorption of the chlorine arresting agent that this method obtains and close caking; therefore publication number is that the patent of invention of CN1973965A is improved the preparation method; with calcium hydroxide is primary raw material; add surfactant again; the overlay film drier; the diluent and the sodium metasilicate of overlay film drier are prepared from, and the arresting agent of this legal system has good dechlorination effect.But the component of this method preparation process and trapping and eliminating powder is all complicated, and use the diluent of acetone as the overlay film drier, acetone is volatile Organic Ingredients, can cause operating environment to be polluted, acetone is classified as " precursor chemicals " by China in addition, also causes its purchase, use to have certain degree of difficulty and risk.
The present invention is directed to chlorine and reveal on issuable great harm and the basis to the abundant analysis of present chlorine arresting research, having proposed with sodium thiosulfate through a large amount of tests is primary raw material, interpolation suitable auxiliary agents, employing dry process chlorine arresting agent.In the pre-stage test process, wet method and dry method flouring technology have been carried out the research contrast, found that dry method has characteristics such as preparation process is simple, raw material is easy to get, with low cost, in order further to determine and optimization technology, investigated the influence of 30 multiple additives and consumption thereof to powder preparation process and powder characteristic, also studied the influence of powder granularity, finally determined technical recipe and parameter bulk density, chlorine elimination factor etc.The sodium thiosulfate arresting agent that the present invention makes disappears effective to catching of chlorine, powder fluidity, bulk density are good, have good protection against the tide and anti-caking capacity.
Summary of the invention
The invention provides a kind of preparation method of chlorine trapping and eliminating powder, use the diluent of acetone, cause operating environment to be polluted and the easy moisture absorption and the problem of closing caking as the overlay film drier to solve existing chlorine arresting powder, preparation method thereof.
Based on the problems referred to above and purpose, the preparation method that the present invention takes pulverizes the sodium metasilicate of 80%～95% sodium thiosulfate, 1%～5% dolomol, 1%～5% neopelex and 3%～10% after the back sieves with the accurate sub-sieve of 400 targets by mass fraction, makes chlorine trapping and eliminating powder.
What said method of the present invention was prepared is a kind of sodium thiosulfate powder of modification, its bulk density≤0.55g/cm
3, to the adsorbance 〉=0.23g/g (every gram arresting agent absorbs the quality of chlorine) of chlorine.
Adopt dolomol as drier in the inventive method, prevented the powder moisture absorption effectively and the caking that causes; Adopt neopelex as surfactant, changed the flowability and the bulk density of sodium thiosulfate powder, prevented the agglomeration that powder causes because of granularity is less effectively; Adopt sodium metasilicate as a kind of ion dispersant, its anionic group SiO
3 2-The particle surface Zeta potential is increased, improved the electrostatic repulsion forces effect, make to be not easy to cause reunion between the particle, therefore increase the decentralization of powder.
The inventive method technical process is simple, have good flowability and bulk density, and wherein, the main component sodium thiosulfate of employing and the reaction equation of chlorine the following is:
2Na
2S
2O
3+Cl
2→Na
2S
4O
6+2NaCl
If following reaction can take place with chlorine in sodium thiosulfate in the presence of water:
Na
2S
2O
3+4Cl
2+5H
2O→Na
2SO
4+8HCl+H
2SO
4
Sodium thiosulfate is except that taking place the above-mentioned chemical reaction with chlorine, and the granularity≤38 μ m because of this trapping and eliminating powder have bigger specific area, therefore, can also with the absorption of chlorine generation certain physical, thereby reach good dechlorination effect.
The specific embodiment
Further describe the preparation method of a kind of chlorine trapping and eliminating powder that the present invention calls oneself below by the specific embodiment.
Embodiment 1
Take by weighing 50g sodium thiosulfate, 1.5g dolomol, 1.5g neopelex, 2.5g sodium metasilicate and place pulverizer, control rotating speed 20000r/min pulverizes 10s, with making chlorine trapping and eliminating powder after the accurate sub-sieve screening of 400 targets, recording bulk density is 0.53g/cm then
3, be 0.24g/g to the adsorbance of chlorine.
Embodiment 2
Take by weighing 50g sodium thiosulfate, 1.0g dolomol, 2g neopelex, 4g sodium metasilicate and place pulverizer, control rotating speed 20000r/min pulverizes 10s, with making chlorine trapping and eliminating powder after the accurate sub-sieve screening of 400 targets, recording bulk density is 0.49g/cm then
3, be 0.26g/g to the adsorbance of chlorine.
Embodiment 3
Take by weighing 50g sodium thiosulfate, 2.5g dolomol, 1g neopelex, 3g sodium metasilicate and place pulverizer, control rotating speed 20000r/min pulverizes 10s, with making chlorine trapping and eliminating powder after the accurate sub-sieve screening of 400 targets, recording bulk density is 0.51g/cm then
3, be 0.24g/g to the adsorbance of chlorine.
Embodiment 4
Take by weighing 50g sodium thiosulfate, 2g dolomol, 2.5g neopelex, 5g sodium metasilicate and place pulverizer, control rotating speed 20000r/min pulverizes 10s, with making chlorine trapping and eliminating powder after the accurate sub-sieve screening of 400 targets, recording bulk density is 0.54g/cm then
3, be 0.27g/g to the adsorbance of chlorine.
Embodiment 5
Take by weighing 50g sodium thiosulfate, 0.5g dolomol, 2g neopelex, 3.5g sodium metasilicate and place pulverizer, control rotating speed 20000r/min pulverizes 10s, with making chlorine trapping and eliminating powder after the accurate sub-sieve screening of 400 targets, recording bulk density is 0.49g/cm then
3, be 0.25g/g to the adsorbance of chlorine.
Claims (2)
1. the preparation method of a chlorine trapping and eliminating powder, this method is that the sodium metasilicate of 80%～95% sodium thiosulfate, 1%～5% dolomol, 1%～5% neopelex and 3%～10% is pulverized after the back sieves with the accurate sub-sieve of 400 targets with mass fraction, makes chlorine trapping and eliminating powder.
2. the method for claim 1, the bulk density≤0.55g/cm of the chlorine trapping and eliminating powder that this method is prepared
3, to the adsorbance 〉=0.23g/g of chlorine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010149353XA CN101810991B (en) | 2010-04-14 | 2010-04-14 | Method for preparing chlorine trapping and eliminating powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010149353XA CN101810991B (en) | 2010-04-14 | 2010-04-14 | Method for preparing chlorine trapping and eliminating powder |
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| Publication Number | Publication Date |
|---|---|
| CN101810991A CN101810991A (en) | 2010-08-25 |
| CN101810991B true CN101810991B (en) | 2011-10-05 |
Family
ID=42618443
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|---|---|---|---|
| CN201010149353XA Expired - Fee Related CN101810991B (en) | 2010-04-14 | 2010-04-14 | Method for preparing chlorine trapping and eliminating powder |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI672263B (en) * | 2016-09-14 | 2019-09-21 | 優尼克生技股份有限公司 | Chlorine dioxide purification method |
| CN106861414A (en) * | 2017-04-17 | 2017-06-20 | 中国石油化工股份有限公司 | Efficient chlorine leakage scavenger and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569311A (en) * | 2003-07-24 | 2005-01-26 | 中国疾病预防控制中心环境与健康相关产品安全所 | Highly effective defluorination agent for combustion coal smoke and preparation method thereof |
| CN1973965A (en) * | 2006-11-22 | 2007-06-06 | 夏元超 | Chlorine collecting agent and its prepn and application |
| CN101274211A (en) * | 2008-05-23 | 2008-10-01 | 北京三聚环保新材料股份有限公司 | High-temperature dechlorinating agent and preparing method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49106989A (en) * | 1973-02-17 | 1974-10-11 | ||
| JPS5978942A (en) * | 1982-10-22 | 1984-05-08 | Furukawa Electric Co Ltd:The | Treatment of waste gas in system for manufacturing base material for optical fiber |
-
2010
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1569311A (en) * | 2003-07-24 | 2005-01-26 | 中国疾病预防控制中心环境与健康相关产品安全所 | Highly effective defluorination agent for combustion coal smoke and preparation method thereof |
| CN1973965A (en) * | 2006-11-22 | 2007-06-06 | 夏元超 | Chlorine collecting agent and its prepn and application |
| CN101274211A (en) * | 2008-05-23 | 2008-10-01 | 北京三聚环保新材料股份有限公司 | High-temperature dechlorinating agent and preparing method thereof |
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| Publication number | Publication date |
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| CN101810991A (en) | 2010-08-25 |
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Granted publication date: 20111005 Termination date: 20130414 |