Dicumyl peroxide production method

A technology for the production of dicumyl peroxide and dicumyl peroxide, which is applied to the preparation of peroxygen compounds, chemical instruments and methods, and the preparation of organic compounds, and can solve the problems of high production energy consumption and yield of large crystals Low, poor transparency and other issues, to achieve the effect of reducing high production energy consumption, improving product quality, and good technical effects

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 problem to be solved by the present invention is the poor product quality, irregular crystal shape, poor transparency, serious crystal occlusion and coalescence, uneven distribution of crystal particle size, large particle Problems of low crystal yield and high production energy consumption provide a method for producing dicumyl peroxide

Method used

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  • Dicumyl peroxide production method

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Effect test

Embodiment 1

[0024] The method for producing dicumyl peroxide of the present invention.

[0025] Such as figure 1 Described, the 90% raw material that contains dicumyl peroxide concentration is 90% and crystallization solvent (95% ethanol) carry out continuous cooling crystallization in crystallizer I, and crystallization temperature is 15 ℃, and the control heat transfer temperature difference is 5 ℃, obtains containing The crystal slurry I of dicumyl peroxide crystals only adds seed crystals at the start-up stage, and adds seed crystals when it drops to saturation temperature. The seed crystal amount is 10% of the dicumyl peroxide raw material amount, and the seed crystal purity is 99.5%, the particle size is 710μm; solid-liquid separation is carried out on the magma Ⅰ to obtain dicumyl peroxide crystal Ⅰ and crystallization mother liquor Ⅰ; dicumyl peroxide crystal Ⅰ is discharged as a product after washing and drying, and the product is granules crystals, regular in shape, transparent...

Embodiment 2

[0027] The method for producing dicumyl peroxide of the present invention.

[0028] Such as figure 1Described, according to the operation method of embodiment 1, the operating temperature of crystallizer I is 10 ℃, and the operating temperature of crystallizer II is-10 ℃, and the fine powder of particle diameter≤425 μ m in dicumyl peroxide crystal II accounts for 20 %, and then returned to the crystallizer Ⅰ, the dicumyl peroxide crystal II lost 20% of its mass due to the dissolution of fine crystals, and the dicumyl peroxide product was obtained as granular crystals, regular in shape, transparent, free of occlusion and poly The purity is 99.9%, the crystal particle size distribution is uniform, and the crystal mass with a particle size ≥ 850 μm accounts for 90% of the total mass of crystal II, and there is no fine powder with a particle size ≤ 425 μm.

Embodiment 3

[0030] The method for producing dicumyl peroxide of the present invention.

[0031] Such as figure 1 Described, according to the operation method of embodiment 1, crystallization solvent is dehydrated alcohol, and the fine powder of particle diameter≤425 μ m in dicumyl peroxide crystal II accounts for 15%, returns in the crystallizer I again, diisopropylbenzene peroxide Propylbenzene crystal II loses 15% of its mass due to the dissolution of fine crystals, and the obtained dicumyl peroxide product is a granular crystal, regular in shape, transparent, free of occlusion and agglomeration, with a purity of 99.9% and uniform distribution of crystal particle size. The mass of crystals with a particle size ≥ 850 μm accounts for 91% of the total mass of crystal II, and there is no fine powder with a particle size ≤ 425 μm.

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Abstract

The invention relates to a dicumyl peroxide production method, which comprises: carrying out cooling crystallization on a dicumyl peroxide raw material and a crystallization solvent in a crystallizerI, and carrying out solid-liquid separation on the obtained crystal slurry I to obtain a dicumyl peroxide crystal I and a crystallization mother liquor I; washing the dicumyl peroxide crystal I, drying, and discharging as the product; making the crystallization mother liquor I enters a crystallizer II, continuously crystallizing, and carrying out solid-liquid separation on the obtained crystal slurry II to obtain a dicumyl peroxide crystal II and a crystallization mother liquor II; and making the dicumyl peroxide crystal II return to the crystallizer I, and discharging the crystallization mother liquor II out of the crystallization device to carry out solvent recovery. According to the present invention, with the technical scheme, 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 are well solved; and the dicumyl peroxide production method can be used in the production of dicumyl peroxide.

Description

technical field [0001] The present invention relates to a kind of method of producing 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 recryst...

Claims

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Application Information

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