CN105001677B - A kind of strontium nitrate method of modifying - Google Patents
A kind of strontium nitrate method of modifying Download PDFInfo
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- CN105001677B CN105001677B CN201510494561.6A CN201510494561A CN105001677B CN 105001677 B CN105001677 B CN 105001677B CN 201510494561 A CN201510494561 A CN 201510494561A CN 105001677 B CN105001677 B CN 105001677B
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Abstract
The present invention relates to inorganic chemical industries, it is therefore an objective to provide a kind of strontium nitrate method of modifying, to guarantee the service performance of strontium nitrate, while reduce its degree of danger.Strontium nitrate modification method includes: a, surface modifier A is added in strontium nitrate solution before concentration；B, heating condensing crystallizing is carried out to solution；C, by crystal object centrifugal dehydration；D, it dries, makes strontium nitrate moisture content less than 0.20%；E, inorganic inert attachment B is uniformly blended into strontium nitrate again after the drying；The surface modifier A is sulfonic acid or its esters substance, and the inertia attachment B is the inorganic compound or inorganic calcium salt of silicon；Based on butt strontium nitrate, 0.01 ‰ or more surface modifier A dosage, 1 ‰ or more inertia attachment dosage.Of the invention solves the problems, such as that strontium nitrate is inflammable and explosive.Convenient for product processing, transport, storage and use；Reduce corresponding cost.And criminal is prevented and has stolen the risk destroyed.
Description
Technical field
The present invention relates to inorganic chemical industries, and in particular to the modification of strontium nitrate.
Background technique
Strontium nitrate is a kind of white or faint yellow cubic crystal；It is soluble easily in water, do not dissolve in nitric acid and Diluted Alcohol.It is mainly used for
In liquid crystal glass base, optical glass and fluorophor industry.It is one of most important raw material in liquid crystal glass base production；Have
The huge market demand.The production technology of strontium nitrate is mainly at present: strontium carbonate being added in reactor, is slowly added under stiring
Enter 98% nitric acid to be reacted, until reaction solution pH value is 4~5；After filters pressing, filtrate is sent to evaporator and is evaporated concentration analysis
It crystallizes, is centrifuged while hot out, be dried at 100~150 DEG C, strontium nitrate finished product is made.
But the chemical characteristic that strontium nitrate has its intrinsic: strontium nitrate is strong oxidizer, and when heating is easy to decompose to give off oxygen；And have
Burning can be caused even to explode when the contact of machine object, friction, collision, chance fire；Issue peony flame.Prohibit and match object: strong reduction
Agent, strong acid, inflammable or combustible.The danger rule classification of strontium nitrate and number are 5.1 class 51059 of GB.Therefore strontium nitrate transport and
Storage will be managed according to hazardous chemical, it is necessary to be produced, transported, store according to hazardous chemical relevant laws and regulations
Deposit management.This causes its production, transport, storage cost and cost very high.It not can avoid generation burning, explosion also simultaneously, make
At the risk of huge economic losses and casualties.Serious disaster consequence is caused it could even be possible to feared one's share of expenses for a joint undertaking cruelly and stolen etc..
Summary of the invention
The main object of the present invention is to provide a kind of strontium nitrate method of modifying, to guarantee the service performance of strontium nitrate, simultaneously
Reduce its degree of danger.
For achieving the above object, the specific technical solution of the present invention is: a kind of strontium nitrate method of modifying, step packet
It includes: strontium nitrate is modified with surface modifier, then uniformly coat inertia attachment；The surface modifier is sulfonic acid
Or its esters substance, 0.01 ‰ or more dosage；The inertia attachment B is the inorganic compound or inorganic calcium salt of silicon, dosage
1 ‰ or more.
Preferably, the step includes:
A, surface modifier A is added in strontium nitrate solution before concentration；
B, heating condensing crystallizing is carried out to solution；
C, by crystal object centrifugal dehydration；
D, it dries, makes strontium nitrate moisture content less than 0.20%；
E, inertia attachment B is uniformly blended into strontium nitrate again after the drying；
The surface modifier A is sulfonic acid or its esters substance, and the inertia attachment B is the inorganic compound of silicon
Or inorganic calcium salt；Based on butt strontium nitrate, 0.01 ‰ or more surface modifier A dosage, 1 ‰ or more inertia attachment B dosage.
Preferably, the inorganic compound of the silicon is fumed silica or precipitated silica.
Preferably, the surface modifier A is benzene sulfonic acid sodium salt or or mixtures thereof benzene sulfonic acid or nitrobenzene-sulfonic acid.
Preferably, the dosage of the surface modifier A is 1~1.5 ‰, and the dosage of inertia attachment B is 5~7 ‰.
Preferably, the dosage of the surface modifier A is 1 ‰, and the dosage of inertia attachment B is 5 ‰.
Correspondingly, a kind of modified strontium nitrate product, including uniformly mixed surface modifier A and inertia attachment B；It is described
Surface modifier A is sulfonic acid or its esters substance, and content is 0.01 ‰ or more；The inertia attachment B is the inorganization of silicon
Object or inorganic calcium salt are closed, content is 1 ‰ or more.
Preferably, the inorganic compound of the silicon is fumed silica or precipitated silica.
Preferably, the surface modifier A is benzene sulfonic acid sodium salt or or mixtures thereof benzene sulfonic acid or nitrobenzene-sulfonic acid.
Preferably, the dosage of the surface modifier A is 1~1.5 ‰, and the dosage of inertia attachment B is 5~7 ‰.
Preferably, the dosage of the surface modifier A is 1 ‰, and the dosage of inertia attachment B is 5 ‰.
Beneficial effects of the present invention: the inorganization of silicon is added because being mainly used for the processing such as liquid crystal glass base in product
Object or inorganic calcium salt are closed, normal use is not influenced；Surface modifier content be ten thousand/it is several arrive some thousandths of, can be used as impurity
Treat, nor affects on use.And modified product has been delivered to customer in batches using verifying, effect is fine.
The present invention adds two class Common materials as additive, simple to operate, low in cost；And successfully solves nitre
The inflammable and explosive problem of sour strontium.Reduce the risk and danger classes of strontium nitrate product.Convenient for product processing, transport, storage
With use；Reduce corresponding cost.And criminal is prevented and has stolen the risk destroyed.Meanwhile the performance of strontium nitrate product
Index, which still conforms to liquid-crystalline glasses, the occasions such as processes substantially and uses, and service performance and market value are not affected.Therefore it takes
Obtained significant social and economic benefit.And because reducing risk, restricted neck is previously also used to be very much
Domain and occasion attempt the precondition provided using strontium nitrate.
Specific embodiment
To make those skilled in the art understand implementation method and technical effect of the invention in more detail, following implementation is provided
Example and corresponding detection data.
Embodiment one
A: benzene sulfonic acid sodium salt, B precipitated silica, granularity is less than 1000 mesh, that is, crosses 1000 meshes or thinner
Powder；
The strontium nitrate product for buying commercially available net content 98.3%, is configured to the strontium nitrate solution of 40% concentration；
Strontium nitrate solution is divided into 5 groups, is separately added into 0.2 ‰, 0.5 ‰, 1.0 ‰, 1.5 ‰, 2.0 ‰ benzene sulfonic acid sodium salt, is
Sample 1~5；
Condensing crystallizing, centrifugal dehydration；
It is dried respectively with fluidized bed to moisture content 0.16%；
Corresponding sample 1~5 is separately added into 1 ‰, 3 ‰, 5 ‰, 7 ‰, 9 ‰ precipitated silica, obtains finished product sample 1
~5, totally 5 groups.
Oxidisability test is carried out by GB/T21617-2008 " dangerous material solid oxidation test method ", is tested such as table institute
Show (burning time is in seconds):
| 1 | 2 | 3 | 4 | 5 | |
| Correct mixture I | 326 | 326 | 326 | 326 | 326 |
| Correct mixture II | 265 | 265 | 265 | 265 | 265 |
| Detect mixture I | 385 | 467 | 589 | 658 | 662 |
| Detect mixture II | 341 | 382 | 419 | 454 | 453 |
Embodiment two
A: benzene sulfonic acid sodium salt, B fumed silica, granularity is less than 1000 mesh；
Strontium carbonate is added in reactor, 98% nitric acid is added slowly with stirring and is reacted, until reaction solution pH value
It is 4；The strontium nitrate solution of 43.5% concentration is obtained after filters pressing；
Strontium nitrate solution is divided into 5 groups, is separately added into 0.2 ‰, 0.5 ‰, 1.0 ‰, 1.5 ‰, 2.0 ‰ benzene sulfonic acid sodium salt, is
Sample 6~10；
Condensing crystallizing, centrifugal dehydration；
It is dried respectively with fluidized bed to moisture content 0.16%；
Corresponding sample 6~10 is separately added into 1 ‰, 3 ‰, 5 ‰, 7 ‰, 9 ‰ fumed silica, obtains finished product sample
6~10, totally 5 groups.
Oxidisability test is carried out by GB/T21617-2008 " dangerous material solid oxidation test method ", is tested such as table institute
Show (burning time is in seconds):
| 6 | 7 | 8 | 9 | 10 | |
| Correct mixture I | 326 | 326 | 326 | 326 | 326 |
| Correct mixture II | 265 | 265 | 265 | 265 | 265 |
| Detect mixture I | 366 | 443 | 603 | 645 | 652 |
| Detect mixture II | 352 | 362 | 421 | 445 | 450 |
Embodiment three
A: benzene sulfonic acid, B precipitated silica, silica cross 1000 meshes；
Strontium carbonate is added in reactor, 98% nitric acid is added slowly with stirring and is reacted, until reaction solution pH value
It is 4.2；After filters pressing, the strontium nitrate solution of 52% concentration is obtained；
Strontium nitrate solution is divided into 5 groups, is separately added into 0.2 ‰, 0.5 ‰, 1.0 ‰, 1.5 ‰, 2.0 ‰ benzene sulfonic acid, for examination
Sample 11~15；
Condensing crystallizing, centrifugal dehydration；
It is dried respectively with fluidized bed to moisture content 0.16%；
Corresponding sample 11~15 is separately added into 9 ‰, 7 ‰, 5 ‰, 3 ‰, 1 ‰ precipitated silica, obtains finished product examination
Sample 11~15, totally 5 groups.
Oxidisability test is carried out by GB/T21617-2008 " dangerous material solid oxidation test method ", is tested such as table institute
Show (burning time is in seconds):
| 11 | 12 | 13 | 14 | 15 | |
| Correct mixture I | 326 | 326 | 326 | 326 | 326 |
| Correct mixture II | 265 | 265 | 265 | 265 | 265 |
| Detect mixture I | 385 | 452 | 618 | 541 | 485 |
| Detect mixture II | 346 | 355 | 419 | 352 | 383 |
Example IV
A: o-nitrobenzene sulfonic acid, B calcium carbonate cross 1000 meshes；
The strontium nitrate product for buying commercially available net content 98.4%, is configured to the strontium nitrate solution of 30% concentration；
Strontium nitrate solution is divided into 5 groups, is separately added into 0.2 ‰, 0.5 ‰, 1.0 ‰, 1.5 ‰, 2.0 ‰ ortho-nitrophenyl sulphur
Acid is sample 16~20；
Condensing crystallizing, centrifugal dehydration；
It is dried respectively with fluidized bed to moisture content 0.16%；
Corresponding sample 16~20 is separately added into 1 ‰, 3 ‰, 5 ‰, 7 ‰, 9 ‰ fumed silica, obtains finished product examination
Sample 16~20, totally 5 groups.
Oxidisability test is carried out by GB/T21617-2008 " dangerous material solid oxidation test method ", is tested such as table institute
Show (burning time is in seconds):
| 16 | 17 | 18 | 19 | 20 | |
| Correct mixture I | 326 | 326 | 326 | 326 | 326 |
| Correct mixture II | 265 | 265 | 265 | 265 | 265 |
| Detect mixture I | 380 | 448 | 595 | 619 | 629 |
| Detect mixture II | 352 | 363 | 431 | 448 | 448 |
Embodiment five
The strontium nitrate product for buying commercially available net content 98.4%, is configured to the strontium nitrate solution of 30% concentration；
Strontium nitrate solution is divided into 5 groups, is separately added into 1.0 ‰ o-nitrobenzene sulfonic acid, is sample 21~25；
Condensing crystallizing, centrifugal dehydration；
It is dried respectively with fluidized bed to moisture content 0.16%；
Corresponding sample 21~25 is separately added into 5 ‰ nanometer calcium carbonate, the calcium sulfate for crossing 1000 mesh, the carbon for crossing 1000 mesh
Sour calcium, the tricalcium silicate for crossing 1000 mesh, the dicalcium silicate for crossing 1000 mesh, obtain finished product sample 21~25, and totally 5 groups.
Oxidisability test is carried out by GB/T21617-2008 " dangerous material solid oxidation test method ", is tested such as table institute
Show (burning time is in seconds):
| 21 | 22 | 23 | 24 | 25 | |
| Correct mixture I | 326 | 326 | 326 | 326 | 326 |
| Correct mixture II | 265 | 265 | 265 | 265 | 265 |
| Detect mixture I | 516 | 480 | 478 | 482 | 519 |
| Detect mixture II | 431 | 422 | 433 | 418 | 409 |
Embodiment six
A: the mixture of benzene sulfonic acid sodium salt, benzene sulfonic acid and nitrobenzene-sulfonic acid, mixture quality ratio are 1:1:1；B precipitation method dioxy
SiClx, silica cross 1000 meshes；
The strontium nitrate product for buying commercially available net content 98.4%, is configured to the strontium nitrate solution of 40% concentration；
Strontium nitrate solution is divided into 5 groups, is separately added into 0.2 ‰, 0.5 ‰, 1.0 ‰, 1.5 ‰, 2.0 ‰ mixture, for examination
Sample 26-30；
Condensing crystallizing, centrifugal dehydration；
It is dried respectively with fluidized bed to moisture content 0.16%；
Corresponding sample 26-30 is separately added into 1 ‰, 3 ‰, 5 ‰, 7 ‰, 9 ‰ precipitated silica, obtains finished product sample
26-30, totally 5 groups.
Oxidisability test is carried out by GB/T21617-2008 " dangerous material solid oxidation test method ", is tested such as table institute
Show (burning time is in seconds):
| 26 | 27 | 28 | 29 | 30 | |
| Correct mixture I | 326 | 326 | 326 | 326 | 326 |
| Correct mixture II | 265 | 265 | 265 | 265 | 265 |
| Detect mixture I | 395 | 456 | 601 | 622 | 631 |
| Detect mixture II | 361 | 370 | 441 | 455 | 475 |
Embodiment seven
The strontium nitrate product for buying commercially available net content 98.5%, is configured to the strontium nitrate solution of 40% concentration；
Strontium nitrate solution is divided into 3 groups；
Condensing crystallizing, centrifugal dehydration；
It is dried respectively with fluidized bed to moisture content 0.16%, obtains sample 31~33.
Oxidisability test is carried out by GB/T21617-2008 " dangerous material solid oxidation test method ", is tested such as table institute
Show (burning time is in seconds):
| 31 | 32 | 33 | |
| Correct mixture I | 326 | 326 | 326 |
| Correct mixture II | 265 | 265 | 265 |
| Detect mixture I | 273 | 280 | 276 |
| Detect mixture II | 190 | 195 | 192 |
It is above-mentioned the experimental results showed that, be added to the sample of two kinds of substances of A, B in proportion, oxidisability is not achieved in oxidation susceptibility
The standard of substance.Can also be determined according to above-mentioned test result: the additional amount of usual A is bigger, and obtained surface covering is more uniform,
The B of absorption is more, and Detonating Characteristics are lower.But this growth be not it is linear, when the additive amount of A reaches 1 ‰, then can region it is full
With, continue growing dosage will not dramatically increase absorption B and reduce deflagrability.And three result in A as it can be seen that add in conjunction with the embodiments
In the case where entering amount saturation, the additional amount of B is optimal 5 ‰.It more is also difficult to significantly increase effect, having lacked then can be insufficient.
So comprehensive reduce oxidisability, low cost, ensure that the combined factors such as service performance consider.Surface modifier A dosage 1~
1.5 ‰ is best, and inertia attachment B dosage is best 5~7 ‰.For ease of calculation and production management, such as: A dosage is
1 ‰, B dosage is 5 ‰ or A dosage is 1.5 ‰, B dosage is 7 ‰ to be added.After additive amount has been determined, to different material
Test by embodiment five as it can be seen that the inorganic salts of common silicon of the invention and inorganic calcium salt using effect are all fine.
Testing result before the product of sample 1 is modified and after modified is as shown in the table, by the table it can be seen that this hair
The performance indicator of bright strontium nitrate product, which still conforms to liquid-crystalline glasses, the occasions such as processes substantially and uses, service performance and market value
It is not affected.
| Index | Before addition | After addition |
| Sr(NO3)2% >= | 98.31 | 97.59 |
| Ca%≤ | 0.02 | 0.02 |
| Ba%≤ | 1.00 | 1.00 |
By product 25 Song State Administration of Quality and Technical Supervision Register of chemicals center May in 2015 of sample 13 into
Row identification.As the result is shown: sample is not belonging to ignition solid, is not belonging to oxidising solid, only have " skin corrosion/irritation, sternly
Weight ocular damage/eye irritation "；" sample and fiber quality are than being respectively to be all larger than burning time of mixture of 4:1 and 1:1
Potassium bromate and fiber quality are not belonging to oxidant than the burning time for 3:7 mixture ", it " high warm surfaces: decomposes, is non-ignitable
Burn ", " being not belonging to inflammable solid ".The testing result has reaffirmed safety of the invention.
Claims (7)
1. a kind of strontium nitrate method of modifying, step includes: to be modified strontium nitrate with surface modifier, is then uniformly coated lazy
Property attachment；The surface modifier is benzene sulfonic acid sodium salt or or mixtures thereof benzene sulfonic acid or nitrobenzene-sulfonic acid, dosage 0.01 ‰
More than；The inertia attachment is the inorganic compound or inorganic calcium salt of silicon, 1 ‰ or more dosage, the inorganic chemical of the silicon
Object is fumed silica or precipitated silica.
2. strontium nitrate method of modifying according to claim 1, it is characterised in that: step includes:
A, surface modifier A is added in strontium nitrate solution before concentration；
B, heating condensing crystallizing is carried out to solution；
C, by crystal object centrifugal dehydration；
D, it dries, makes strontium nitrate moisture content less than 0.20%；
E, inertia attachment B is uniformly blended into strontium nitrate again after the drying；
The surface modifier A is benzene sulfonic acid sodium salt or benzene sulfonic acid, and the inertia attachment B is the inorganic compound or nothing of silicon
Machine calcium salt；Based on butt strontium nitrate, 0.01 ‰ or more surface modifier A dosage, 1 ‰ or more inertia attachment B dosage.
3. strontium nitrate method of modifying according to claim 2, it is characterised in that: the dosage of the surface modifier A is
The dosage of 1-1.5 ‰, inertia attachment B are 5-7 ‰.
4. strontium nitrate method of modifying according to claim 3, it is characterised in that: the dosage of the surface modifier A is
The dosage of 1 ‰, inertia attachment B are 5 ‰.
5. a kind of modified strontium nitrate product, including uniformly mixed surface modifier A and inertia attachment B；The surface is modified
Agent A is benzene sulfonic acid sodium salt or or mixtures thereof benzene sulfonic acid or nitrobenzene-sulfonic acid, and content is 0.01 ‰ or more；The inertia attachment
B is the inorganic compound or inorganic calcium salt of silicon, and content is 1 ‰ or more, and the inorganic compound of the silicon is fumed silica
Or precipitated silica.
6. modified strontium nitrate product according to claim 5, it is characterised in that: the dosage of the surface modifier A is
The dosage of 1-1.5 ‰, inertia attachment B are 5-7 ‰.
7. modified strontium nitrate product according to claim 6, it is characterised in that: the dosage of the surface modifier A is
The dosage of 1 ‰, inertia attachment B are 5 ‰.
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| JPH11169705A (en) * | 1997-12-15 | 1999-06-29 | Sharp Corp | Method for modifying surface and surface-modified particle |
| CN1305977C (en) * | 2005-03-04 | 2007-03-21 | 北京化工大学 | Method for modifying the surface of nano inorganic particles by transfer method |
| CN101549880B (en) * | 2009-05-06 | 2011-01-19 | 重庆新申锶盐有限公司 | Preparation method of anti-caking strontium nitrate |
| CN101987736A (en) * | 2009-08-05 | 2011-03-23 | 天津市化学试剂研究所 | Preparation method of high-purity strontium carbonate |
| CN102303887B (en) * | 2011-08-10 | 2013-08-21 | 重庆元和精细化工有限公司 | Production method for special strontium chloride for liquid crystal |
| JP5660170B2 (en) * | 2012-08-16 | 2015-01-28 | 堺化学工業株式会社 | Particulate composition containing nitrate and method for producing the same |
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