CN102367235A - Crystallization method of diisopropylbenzene peroxide - Google Patents
Crystallization method of diisopropylbenzene peroxide Download PDFInfo
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- CN102367235A CN102367235A CN2011103024108A CN201110302410A CN102367235A CN 102367235 A CN102367235 A CN 102367235A CN 2011103024108 A CN2011103024108 A CN 2011103024108A CN 201110302410 A CN201110302410 A CN 201110302410A CN 102367235 A CN102367235 A CN 102367235A
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Abstract
The invention discloses a crystallization method of diisopropylbenzene peroxide. The crystallization method comprises the following steps: mixing a diisopropylbenzene peroxide liquid with an alcohol solvent and then adding the obtained mixture into a crystallization kettle; stirring a diisopropylbenzene peroxide mixed liquid, raising the temperature of the diisopropylbenzene peroxide mixed liquid to 45 DEG C through high-temperature freezing medium in a jacket; cooling the diisopropylbenzene peroxide mixed liquid to 30-32 DEG C by adopting a cooler; after naturally cooling, adding seed crystals in the crystallization kettle; carrying out the second cooling by adopting the cooler for crystallization; directly cooling the diisopropylbenzene peroxide mixed liquid to 2-5 DEG C; and carrying out centrifugal separation so as to obtain granular diisopropylbenzene peroxide. According to the invention, a twice-freezing method is adopted so that the temperature of the freezing medium is controlled, thereby well maintaining small temperature difference between the temperature in the kettle and the temperature of the freezing medium and ensuring good heat transfer effect in the subsequent process; and the seed crystals are added at the appropriate time, so that the yield of granular diisopropylbenzene peroxide in the crystallization process is effectively improved, and the quality of crystallized diisopropylbenzene peroxide is good.
Description
Technical field
The present invention relates to a kind of crystallization method of Di Cumyl Peroxide 99.
Background technology
In the prior art; The crystallization method of Di Cumyl Peroxide 99 is by after 2: 1 mixed with the high concentration liquid of Di Cumyl Peroxide 99 and alcohol in high concentration; Get in the kettle type crystallization still, use-5 ℃ refrigerant, directly cool off through coil pipe and chuck; According to the different solubility in the solvent under the differing temps, reach and isolate high purity Di Cumyl Peroxide 99 crystalline purpose.The weak point of this method is: (1) in process of cooling, temperature is wayward, causes temperature in the kettle and refrigerant excessive temperature differentials, causes on the crystallization kettle wall crystallization too fast and attach on the still wall easily, causes in the subsequent process heat-transfer effect bad; (2) whole crystallisation process is wayward, and in the Di Cumyl Peroxide 99 crystal that is obtained, 5～24 purpose particulate yield are relatively poor, generally can reach 30～40%, and the powdery Di Cumyl Peroxide 99 is more.As everyone knows, Di Cumyl Peroxide 99 is divided into particulate state and two kinds of forms of powdery, wherein granular Di Cumyl Peroxide 99, and feed purity reaches more than 99.5%, and fusing point reaches 39 ℃; Can only reach 98.5% and the purity of powdery Di Cumyl Peroxide 99 is the highest, fusing point can only reach 38.5 ℃, and is more many than powdered Di Cumyl Peroxide 99 good quality with the quality of granular Di Cumyl Peroxide 99.
Summary of the invention
The present invention is just in order to overcome above-mentioned deficiency; Technical problem to be solved provides a kind of crystallization method of Di Cumyl Peroxide 99; Easy temperature control system in the process of cooling of this crystallization method, heat-transfer effect are good, the yield height and the good quality of particulate state Di Cumyl Peroxide 99 after the crystallization.
The crystallization method of a kind of Di Cumyl Peroxide 99 of the present invention comprises the steps:
1, is to mix at 2.5～3: 1 Di Cumyl Peroxide 99 liquid and alcoholic solvent by mass ratio, adds in the crystallization kettle then.
2, the Di Cumyl Peroxide 99 mixing liquid in the stirred crystallization still; Chuck internal recycle to crystallization kettle feeds 65 ℃～70 ℃ secondary brine; Through this secondary brine heating crystallization kettle, make the temperature of Di Cumyl Peroxide 99 mixing liquid in 1.5～2 hours, be increased to 45 ℃.
3, adopt the interior secondary brine of water cooler cooling jacket, keep the temperature of secondary brine and the temperature of Di Cumyl Peroxide 99 mixing liquid to differ 6～10 ℃, make the temperature of Di Cumyl Peroxide 99 mixing liquid in 2～3 hours, drop to 30～32 ℃.
4, naturally cooling Di Cumyl Peroxide 99 mixing liquid adds crystal seed then to its temperature-stable in crystallization kettle, continues to keep this equilibrium temperature 30～60 minutes.
5, adopt the interior secondary brine of water cooler cooling jacket, make Di Cumyl Peroxide 99 mixing liquid crystallisation by cooling, controlled temperature changes as follows:
Be cooled to 27 ℃ from said equilibrium temperature, per hour lower the temperature 0.1～0.4 ℃, the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 4 ℃;
Be cooled to 20 ℃ from 27 ℃, per hour lower the temperature 0.8～1.2 ℃, the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃;
Be cooled to 16 ℃ from 20 ℃, per hour lower the temperature about 1.3～1.7 ℃, the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃.
6, the coil pipe that is provided with the crystallization kettle of primary brine in the employing directly cools off the Di Cumyl Peroxide 99 mixing liquid, makes it in 1.5～3 hours, be cooled to 2～5 ℃.
7, spinning promptly gets granular Di Cumyl Peroxide 99.
Wherein, above-mentioned secondary brine is a refrigerant, and the TR of this refrigerant is-5 ℃～70 ℃.
Wherein, said refrigerant is that massfraction is 30～40% aqueous glycol solution.
The massfraction of the liquid of Di Cumyl Peroxide 99 described in the step 1 is 90～99%.
The feeding quantity of the liquid of Di Cumyl Peroxide 99 described in the step 1 and the ratio of crystallization kettle useful volume are: 2: 3～4, and ton/cubic meter.
Alcoholic solvent described in the step 1 be in ethanol, the methyl alcohol any one, the volume(tric)fraction of said ethanol, methyl alcohol is more than 95%.
Water cooler described in step 3, step 5 and the step 6 uses primary brine to cool off, and said primary brine is-5 ℃ a refrigerant, and said refrigerant is that massfraction is 30～40% aqueous glycol solution.
Freely cool off the Di Cumyl Peroxide 99 mixing liquid described in the step 4 to its temperature-stable, said temperature is 28.8～29.5 ℃.
Crystal seed described in the step 4 is 20～24 purpose Di Cumyl Peroxide 99 particles, and the usage quantity of said crystal seed is 10～15% of a Di Cumyl Peroxide 99 liquid feeding quantity, presses mass ratio and calculates.
Beneficial effect: the crystallization method of Di Cumyl Peroxide 99 of the present invention compared with prior art has the following advantages: adopt secondary refrigerated method; Make the temperature of refrigerant controlled; Thereby keep having a narrow range of temperature of temperature in the kettle and refrigerant well; Can not cause on the crystallization kettle wall crystallization too fast and attach on the still wall, guarantee that heat-transfer effect is good in the subsequent process; Be employed in suitable time interpolation crystal seed, the yield of the particulate state Di Cumyl Peroxide 99 in the crystallisation process is effectively improved, and the Di Cumyl Peroxide 99 good quality after the crystallization.
Embodiment:
Embodiment 1
A kind of crystallization method of Di Cumyl Peroxide 99 comprises the steps:
1, be 95% Di Cumyl Peroxide 99 liquid with 1.4 tons of volume(tric)fractions with 3.8 tons of massfractions is that 95% ethanol mixes, adds useful volume then and be in 6 cubic metres the crystallization kettle.
2, open the steam valve of steam heater, the heating secondary brine makes it temperature and reaches 65 ℃; Di Cumyl Peroxide 99 mixing liquid in the stirred crystallization still; Make materials inside be in flow state; The enhance heat transfer effect, 65 ℃ of secondary brine after the chuck internal recycle of crystallization kettle feeds said heating heat crystallization kettle through this secondary brine then; Make the temperature of Di Cumyl Peroxide 99 mixing liquid in 1.5～2 hours, be increased to 45 ℃, then the steam off valve.Wherein,, can suitably turn down the steam valve of steam heater, the temperature of secondary brine is slowly reduced when the temperature of peroxo-diisopropylbenzene(DIPB) mixing liquid during near 45 ℃.
3, adopt the interior secondary brine of water cooler cooling jacket; The valve of opening the water cooler primary brine cools off; Keep the temperature of secondary brine and the temperature of Di Cumyl Peroxide 99 mixing liquid to differ 6～10 ℃; Make the temperature of Di Cumyl Peroxide 99 mixing liquid per hour descend 6 ± 1 ℃, in 2～3 hours, drop to 31 ℃, close water cooler primary brine valve then.
4, naturally cooling Di Cumyl Peroxide 99 mixing liquid is to its temperature-stable, and this temperature is 29.1 ℃, in crystallization kettle, adds 400 kilogram of 20～24 purpose Di Cumyl Peroxide 99 particle crystal seed then, continues to keep this equilibrium temperature 45 minutes.
5, adopt the interior secondary brine of water cooler cooling jacket, make Di Cumyl Peroxide 99 mixing liquid crystallisation by cooling, controlled temperature changes as follows:
From 29.1 ℃ to 27 ℃, per hour lower the temperature 0.1～0.4 ℃, the time is about 8 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 4 ℃;
Be cooled to 20 ℃ from 27 ℃, per hour lower the temperature 0.8～1.2 ℃, the time is about 7 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃;
Be cooled to 16 ℃ from 20 ℃, per hour lower the temperature about 1.3～1.7 ℃, the time is about 3 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃.
6, the coil pipe that is provided with the crystallization kettle of primary brine in the employing directly cools off the Di Cumyl Peroxide 99 mixing liquid, makes it in 1.5～3 hours, be cooled to 2～5 ℃.
7, spinning promptly gets 70～80% the granular Di Cumyl Peroxide 99 of 5～24 orders.
Wherein, above-mentioned secondary brine is the aqueous glycol solution of refrigerant 30～40%, and the TR of this refrigerant is-5 ℃～70 ℃; Primary brine is the aqueous glycol solution of refrigerant 30～40%, and temperature is-5 ℃.
Embodiment 2
A kind of crystallization method of Di Cumyl Peroxide 99 comprises the steps:
1, is that 90% Di Cumyl Peroxide 99 liquid and 2 tons of volume(tric)fractions are 95% methanol mixed with 6 tons of massfractions, adds useful volume then and be in 10 cubic metres the crystallization kettle.
2, open the steam valve of steam heater, the heating secondary brine makes it temperature and reaches 68 ℃; Di Cumyl Peroxide 99 mixing liquid in the stirred crystallization still; Make materials inside be in flow state; The enhance heat transfer effect, 65～68 ℃ of secondary brine after the chuck internal recycle of crystallization kettle feeds said heating heat crystallization kettle through this secondary brine then; Make the temperature of Di Cumyl Peroxide 99 mixing liquid in 1.5～2 hours, be increased to 45 ℃, then the steam off valve.Wherein,, can suitably turn down the steam valve of steam heater, the temperature of secondary brine is slowly reduced when the temperature of peroxo-diisopropylbenzene(DIPB) mixing liquid during near 45 ℃.
3, adopt the interior secondary brine of water cooler cooling jacket; The valve of opening the water cooler primary brine cools off; Keep the temperature of secondary brine and the temperature of Di Cumyl Peroxide 99 mixing liquid to differ 6～10 ℃; Make the temperature of Di Cumyl Peroxide 99 mixing liquid per hour descend 6 ± 1 ℃, in 2～3 hours, drop to 30.5 ℃, close water cooler primary brine valve then.
4, naturally cooling Di Cumyl Peroxide 99 mixing liquid is to its temperature-stable, and this equilibrium temperature is 29.4 ℃, in crystallization kettle, adds 720 kilogram of 20～24 purpose Di Cumyl Peroxide 99 particle crystal seed then, continues to keep this equilibrium temperature 30 minutes.
5, adopt the interior secondary brine of water cooler cooling jacket, make Di Cumyl Peroxide 99 mixing liquid crystallisation by cooling, controlled temperature changes as follows:
From 29.4 ℃ to 27 ℃, per hour lower the temperature 0.1～0.4 ℃, the time is about 8 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 4 ℃;
Be cooled to 20 ℃ from 27 ℃, per hour lower the temperature 0.8～1.2 ℃, the time is about 7 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃;
Be cooled to 16 ℃ from 20 ℃, per hour lower the temperature about 1.3～1.7 ℃, the time is about 3 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃.
6, the coil pipe that is provided with the crystallization kettle of primary brine in the employing directly cools off the Di Cumyl Peroxide 99 mixing liquid, makes it in 1.5～3 hours, be cooled to 2～5 ℃.
7, spinning promptly gets 70～80% the granular Di Cumyl Peroxide 99 of 5～24 orders.
Wherein, above-mentioned secondary brine is the aqueous glycol solution of refrigerant 30～40%, and the TR of this refrigerant is-5 ℃～70 ℃; Primary brine is the aqueous glycol solution of refrigerant 30～40%, and temperature is-5 ℃.
Embodiment 3
A kind of crystallization method of Di Cumyl Peroxide 99 comprises the steps:
1, be 99% Di Cumyl Peroxide 99 liquid with 0.8 ton of volume(tric)fraction with 2 tons of massfractions is that 95% Virahol mixes, adds useful volume then and be in 4 cubic metres the crystallization kettle.
2, open the steam valve of steam heater, the heating secondary brine makes it temperature and reaches 70 ℃; Di Cumyl Peroxide 99 mixing liquid in the stirred crystallization still; Make materials inside be in flow state; The enhance heat transfer effect; 65～68 ℃ of secondary brine after the chuck internal recycle of crystallization kettle feeds said heating through this secondary brine heating crystallization kettle, make the temperature of Di Cumyl Peroxide 99 mixing liquid in 1.5～2 hours, be increased to 45 ℃ then.Steam off valve then.Wherein,, can suitably turn down the steam valve of steam heater, the temperature of secondary brine is slowly reduced when the temperature of peroxo-diisopropylbenzene(DIPB) mixing liquid during near 45 ℃.
3, adopt the interior secondary brine of water cooler cooling jacket; The valve of opening the water cooler primary brine cools off; Keep the temperature of secondary brine and the temperature of Di Cumyl Peroxide 99 mixing liquid to differ 6～10 ℃; Make the temperature of Di Cumyl Peroxide 99 mixing liquid per hour descend 6 ± 1 ℃, in 2～3 hours, drop to 32 ℃, close water cooler primary brine valve then.
4, naturally cooling Di Cumyl Peroxide 99 mixing liquid to its temperature-stable is 28.9 ℃, in crystallization kettle, adds 300 kilogram of 20～24 purpose Di Cumyl Peroxide 99 particle crystal seed then, continues to keep this equilibrium temperature 60 minutes.
5, adopt the interior secondary brine of water cooler cooling jacket, make Di Cumyl Peroxide 99 mixing liquid crystallisation by cooling, controlled temperature changes as follows:
From 28.9 ℃ to 27 ℃, per hour lower the temperature 0.1～0.4 ℃, the time is about 8 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 4 ℃;
Be cooled to 20 ℃ from 27 ℃, per hour lower the temperature 0.8～1.2 ℃, the time is about 7 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃;
Be cooled to 16 ℃ from 20 ℃, per hour lower the temperature about 1.3～1.7 ℃, the time is about 3 hours, and the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃.
6, the coil pipe that is provided with the crystallization kettle of primary brine in the employing directly cools off the Di Cumyl Peroxide 99 mixing liquid, makes it in 1.5～3 hours, be cooled to 2～5 ℃.
7, spinning promptly gets 75～85% the granular Di Cumyl Peroxide 99 of 5～24 orders.
Wherein, above-mentioned secondary brine is the aqueous glycol solution of refrigerant 30～40%, and the TR of this refrigerant is-5 ℃～70 ℃; Primary brine is the aqueous glycol solution of refrigerant 30～40%, and temperature is-5 ℃.
Need to prove that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement the technical scheme of invention, and not break away from the scope of technical scheme of the present invention, it all should be encompassed in the claim scope of the present invention.
Claims (10)
1. the crystallization method of a Di Cumyl Peroxide 99, it is characterized in that: this crystallization method comprises the steps:
(1) is to mix at 2.5～3: 1 Di Cumyl Peroxide 99 liquid and alcoholic solvent by mass ratio, adds then in the crystallization kettle;
(2) the Di Cumyl Peroxide 99 mixing liquid in the stirred crystallization still; Chuck internal recycle to crystallization kettle feeds 65 ℃～70 ℃ secondary brine; Through this secondary brine heating crystallization kettle, make the temperature of Di Cumyl Peroxide 99 mixing liquid in 1.5～2 hours, be increased to 45 ℃;
(3) adopt the interior secondary brine of water cooler cooling jacket, keep the temperature of secondary brine and the temperature of Di Cumyl Peroxide 99 mixing liquid to differ 6～10 ℃, make the temperature of Di Cumyl Peroxide 99 mixing liquid in 2～3 hours, drop to 30～32 ℃;
(4) naturally cooling Di Cumyl Peroxide 99 mixing liquid adds crystal seed then to its temperature-stable in crystallization kettle, continues to keep this equilibrium temperature 30～60 minutes;
(5) adopt the interior secondary brine of water cooler cooling jacket, make Di Cumyl Peroxide 99 mixing liquid crystallisation by cooling, controlled temperature changes as follows:
Be cooled to 27 ℃ from said equilibrium temperature, per hour lower the temperature 0.1～0.4 ℃, the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 4 ℃;
Be cooled to 20 ℃ from 27 ℃, per hour lower the temperature 0.8～1.2 ℃, the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃;
Be cooled to 16 ℃ from 20 ℃, per hour lower the temperature about 1.3～1.7 ℃, the temperature difference that keeps secondary brine and Di Cumyl Peroxide 99 mixing liquid temperature is less than 6 ℃;
(6) adopt the coil pipe of crystallization kettle directly to cool off the Di Cumyl Peroxide 99 mixing liquid, make it in 1.5～3 hours, be cooled to 2～5 ℃;
(7) spinning promptly gets granular Di Cumyl Peroxide 99;
Wherein, said secondary brine is a refrigerant, and the TR of this refrigerant is-5 ℃～70 ℃.
2. the crystallization method of a kind of Di Cumyl Peroxide 99 according to claim 1, it is characterized in that: the massfraction of Di Cumyl Peroxide 99 liquid is 90～99% described in the step (1).
3. the crystallization method of a kind of Di Cumyl Peroxide 99 according to claim 1, it is characterized in that: the ratio of the feeding quantity of Di Cumyl Peroxide 99 liquid and crystallization kettle useful volume is described in the step (1): 2: 3～4, ton/cubic meter.
4. the crystallization method of a kind of Di Cumyl Peroxide 99 according to claim 1 is characterized in that: alcoholic solvent described in the step (1) be in ethanol, the methyl alcohol any one.
5. the crystallization method of a kind of Di Cumyl Peroxide 99 according to claim 4, it is characterized in that: the volume(tric)fraction of said ethanol, methyl alcohol is more than 95%.
6. the crystallization method of a kind of Di Cumyl Peroxide 99 according to claim 1 is characterized in that: water cooler described in step (3), step (5) and the step (6) uses primary brine to cool off, and said primary brine is-5 ℃ a refrigerant.
7. according to the crystallization method of claim 1 or 6 described a kind of Di Cumyl Peroxide 99s, it is characterized in that: said refrigerant is that massfraction is 30～40% aqueous glycol solution.
8. the crystallization method of a kind of Di Cumyl Peroxide 99 according to claim 1, it is characterized in that: freely cool off the Di Cumyl Peroxide 99 mixing liquid to its temperature-stable described in the step (4), said temperature is 28.8～29.5 ℃.
9. the crystallization method of a kind of Di Cumyl Peroxide 99 according to claim 1, it is characterized in that: crystal seed described in the step (4) is 20～24 purpose Di Cumyl Peroxide 99 particles.
10. the crystallization method of a kind of Di Cumyl Peroxide 99 according to claim 9, it is characterized in that: the usage quantity of said crystal seed is 10～15% of a Di Cumyl Peroxide 99 liquid feeding quantity, presses mass ratio and calculates.
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| CN2011103024108A CN102367235A (en) | 2011-10-09 | 2011-10-09 | Crystallization method of diisopropylbenzene peroxide |
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| CN2011103024108A CN102367235A (en) | 2011-10-09 | 2011-10-09 | Crystallization method of diisopropylbenzene peroxide |
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Cited By (8)
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| CN107235882A (en) * | 2017-07-26 | 2017-10-10 | 江苏道明化学有限公司 | A kind of finished product morphological process method of cumyl peroxide |
| CN108069888A (en) * | 2016-11-09 | 2018-05-25 | 中国石油化工股份有限公司 | A kind of method for crystallising of bulky grain cumyl peroxide |
| CN109535056A (en) * | 2018-12-20 | 2019-03-29 | 江苏道明化学有限公司 | A method of control centrifugal condition improves particle yield |
| CN109694342A (en) * | 2017-10-20 | 2019-04-30 | 中国石油化工股份有限公司 | The production method of cumyl peroxide |
| CN109694341A (en) * | 2017-10-20 | 2019-04-30 | 中国石油化工股份有限公司 | The method for producing cumyl peroxide |
| CN109867615A (en) * | 2017-12-05 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of method for crystallising of bulky grain cumyl peroxide |
| CN114478342A (en) * | 2020-10-27 | 2022-05-13 | 中国石油化工股份有限公司 | Dicumyl peroxide and crystallization method thereof |
| CN114478342B (en) * | 2020-10-27 | 2024-05-03 | 中国石油化工股份有限公司 | Dicumyl peroxide and crystallization method thereof |
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| CN108069888A (en) * | 2016-11-09 | 2018-05-25 | 中国石油化工股份有限公司 | A kind of method for crystallising of bulky grain cumyl peroxide |
| CN107235882A (en) * | 2017-07-26 | 2017-10-10 | 江苏道明化学有限公司 | A kind of finished product morphological process method of cumyl peroxide |
| CN109694342A (en) * | 2017-10-20 | 2019-04-30 | 中国石油化工股份有限公司 | The production method of cumyl peroxide |
| CN109694341A (en) * | 2017-10-20 | 2019-04-30 | 中国石油化工股份有限公司 | The method for producing cumyl peroxide |
| CN109694342B (en) * | 2017-10-20 | 2021-02-09 | 中国石油化工股份有限公司 | Production method of dicumyl peroxide |
| CN109867615A (en) * | 2017-12-05 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of method for crystallising of bulky grain cumyl peroxide |
| CN109867615B (en) * | 2017-12-05 | 2021-06-11 | 中国石油化工股份有限公司 | Crystallization method of large-particle dicumyl peroxide |
| CN109535056A (en) * | 2018-12-20 | 2019-03-29 | 江苏道明化学有限公司 | A method of control centrifugal condition improves particle yield |
| CN114478342A (en) * | 2020-10-27 | 2022-05-13 | 中国石油化工股份有限公司 | Dicumyl peroxide and crystallization method thereof |
| CN114478342B (en) * | 2020-10-27 | 2024-05-03 | 中国石油化工股份有限公司 | Dicumyl peroxide and crystallization method thereof |
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