Dicumyl peroxide production method

A technology of dicumyl peroxide and its production method, which is applied to the preparation of peroxide compounds, chemical instruments and methods, and the preparation of organic compounds. Eliminate the problems of low yield of granular crystals, and achieve the effects of perfect crystal growth, reduced occlusion and coalescence, and reduced operation difficulty

Active Publication Date: 2019-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problems to be solved by the present invention are poor product quality, irregular crystal shape, poor transparency, serious crystal occlusion and coalescence, uneven distribution of crys

Method used

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  • Dicumyl peroxide production method

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Example Embodiment

[0022] [Example 1]

[0023] The production method of dicumyl peroxide according to the present invention.

[0024] Such as figure 1 Said, 90% of the raw materials containing dicumyl peroxide and the crystallization solvent (95% ethanol) are cooled and crystallized in the crystallizer, and when the saturation temperature is reduced, seed crystals are added, and the amount of seed crystals is diisopropyl peroxide 10% of the benzene raw material, 99.5% seed crystal purity, 710μm particle size, controlled heat transfer temperature difference of 3°C, and crystallization end temperature of 2°C to obtain crystal slurry I containing dicumyl peroxide crystals; I carry out solid-liquid separation to obtain dicumyl peroxide crystal I and crystallization mother liquor I. The crystallization mother liquor I is discharged from the crystallization device for solvent recovery; the dicumyl peroxide crystal I is sent to the beating tank, and the saturated crystallization solvent is used to It is p...

Example Embodiment

[0025] [Example 2]

[0026] The production method of dicumyl peroxide according to the present invention.

[0027] Such as figure 1 According to the operating method of Example 1, the crystallization process is continuous crystallization, and the seed crystals are only added during the start-up phase. The crystallization temperature is 5°C, the heat transfer temperature difference is controlled to 5°C, and the diameter of the dicumyl peroxide crystal I Fine powder ≤425μm accounts for 15%, the operating temperature of beating and washing is 7°C, crystal I loses 15% of the quality of beating and washing, part of crystallization mother liquor II is returned to the beating tank as washing liquid, and the rest is returned to the crystallizer to continue crystallization. The final product of dicumyl peroxide is obtained. The product is a granular crystal with regular shape, transparency, no encapsulation or coalescence, with a purity of 99.9% and a uniform distribution of crystal partic...

Example Embodiment

[0028] [Example 3]

[0029] The production method of dicumyl peroxide according to the present invention.

[0030] Such as figure 1 According to the operating method of Example 1, the crystallization solvent is anhydrous ethanol, and the crystallization process is continuous crystallization. The seed crystals are only added during the start-up phase, the crystallization temperature is 0°C, and the heat transfer temperature difference is controlled to 2°C. The fine powder with a particle size of ≤425μm in the propylene benzene crystal I accounted for 10%. The operation temperature of beating and washing was 3°C. The quality of crystal I was lost 10% due to beating and washing. Part of the crystallization mother liquor II was returned to the beating tank as a washing liquid, and the rest was returned. Continue to crystallize in the crystallizer, and finally obtain the dicumyl peroxide product. The product is a granular crystal, regular in shape, transparent, without encapsulation an...

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Abstract

The invention relates to a dicumyl peroxide production method, which comprises: co-feeding a dicumyl peroxide raw material and a crystallization solvent into a crystallizer, carrying out cooling crystallization, and carrying out solid-liquid separation on the obtained crystal slurry to obtain a dicumyl peroxide crystal I and a crystallization mother liquor I; discharging the crystallization motherliquor I out of the crystallization device, and carrying out solvent recovery; feeding the dicumyl peroxide crystal I into a beating washing tank, and carrying out beating washing on the dicumyl peroxide crystal I by using a washing liquid; carrying out solid-liquid separation on the obtained crystal slurry to obtain a dicumyl peroxide crystal II and a crystallization mother liquor II; drying thedicumyl peroxide crystal II, and discharging as the product; and returning the crystallization mother liquor II to the crystallizer, and continuously crystallizing. According to the present invention, the dicumyl peroxide production method can solve the problems of poor product quality, irregular crystal shape, poor transparency, serious crystal occlusion and coalescence, non-uniform size and non-uniform distribution of crystal particles, low yield of large particle crystals and high energy consumption in the prior art, and can be used in the production of dicumyl peroxide.

Description

technical field [0001] The invention relates to a production method of dicumyl peroxide. Background technique [0002] Dicumyl peroxide is a strong oxidizing agent, referred to as DCP. It is mainly used as a vulcanizing agent for natural rubber and synthetic rubber, an initiator for polymerization reactions, and can also be used as a crosslinking agent for polyethylene resin. It is widely used in shoemaking , wire and cable and building materials and rubber industries. [0003] The production of dicumyl peroxide mainly adopts the batch crystallization method at present, and existing problems include: 1) product quality is relatively poor, such as inhomogeneous crystal particle size distribution, fine powder is more, and the yield of large particle crystal product is low, crystal Severe agglomeration, irregular shape, low crystal transparency, internal occlusion, etc.; 2) The fine powder produced in the crystallization process needs to be dissolved and recrystallized again, ...

Claims

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Application Information

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IPC IPC(8): C07C409/16C07C407/00
CPCC07C407/003C07C409/16
Inventor 陈亮张杰蔡立鑫郭艳姿
Owner CHINA PETROLEUM & CHEM CORP
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