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Device and method for preparing 1, 4-cyclohexane dioctyl phthalate
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A technology for refining dioctyl cyclohexanedicarboxylate, which is applied in the preparation of carboxylic acid esters, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of easy escape of o-phthalic plasticizers, and achieve production Low cost, long-term excellent performance, good compatibility effect
Active Publication Date: 2015-01-07
安徽力天环保科技股份有限公司
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Problems solved by technology
However, phthalic plasticizers are easy to escape into the environment, and at this time they all play the bad role of environmental endocrine disruptors
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Embodiment 1
[0012] The present invention will be described in further detail below in conjunction with specific embodiment: Embodiment 1: a kind of device of preparing 1,4-cyclohexanedicarboxylate dioctyl, comprises esterification kettle 1, refining kettle 2, filter tank 3 and hydrogenation Reaction unit, the hydrogenation reaction unit includes a middle tank 4 provided with a solution heater, a hydrogen compression device 6, a hydrogenation reactor 5 connected to the middle tank 4, and an outlet of the hydrogen compression device 6 communicates with The lower catalyst bed layer of the hydrogenation reactor 5 has another outlet connected to a circulating hydrogen preheater 7, the circulating hydrogen preheater 7 is connected to a circulating hydrogen heater 8, and the circulating hydrogen heater 8 is connected to the heating A hydrogen reactor 5, the hydrogenation reactor 5 is connected with a high-pressure flash tank 9, one of the outlets of the high-pressure flash tank 9 is connected wit...
Embodiment 2
[0014]Example 2, a method for preparing dioctyl 1,4-cyclohexanedicarboxylate suitable for large-scale industrial production, which is characterized in that it includes the following steps: 1) Esterification: open nitrogen to pass into the esterification kettle , after the air is exhausted, start stirring, put in octanol, put in the catalyst, put in terephthalic acid, wherein, the molar ratio of terephthalic acid and octanol is 1:3, after feeding, close the solid feeding port With nitrogen, start to heat up, carry out the esterification reaction, raise the temperature to 220°C~230°C, when the acid value of the esterification reaches below 1mgKOH / g, the esterification reaction is over, turn off the steam, turn on the cooling water to cool down to 100°C, and use a vacuum transfer 2) Neutralization and water washing: start the refining kettle to stir, pump the prepared alkaline water into the refining kettle for neutralization, after the material is fully mixed with the liquid caus...
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Abstract
The invention discloses a device for preparing 1, 4-cyclohexane dioctyl phthalate. The device comprises an esterification kettle, a refining kettle, a filtering tank and a hydrogenation reaction unit. The hydrogenation reaction unit comprises an intermediate tank, a hydrogen compressing device and a hydrogenation reactor and further comprises a gas-liquid separation system. The intermediate tank is provided with a solution heater, the hydrogenation reactor is connected with the intermediate tank, and the gas-liquid separation system is connected with the hydrogenation reaction unit. The invention further discloses a preparation method. The preparation method includes the steps of esterification, neutralization, washing, refining and hydrogenation reacting. Compared with the prior art, the device for preparing the 1, 4-cyclohexane dioctyl phthalate has the advantages of being applied to industrial large-scale production, low in cost and high in efficiency. The 1, 4-cyclohexane dioctyl phthalate has a good toxicological property, is well compatible with polyvinyl chloride (PVC), odorless, environment-friendly and non-toxic. In the process of pelleting or plastifying, the 1, 4-cyclohexane dioctyl phthalate is compatible with PVC materials quite well, low in viscosity and capable of being applied to a specific injection mold so that service cycle of a plastification product is prolonged, and a final product is very low in mobility after plastified by the 1, 4-clohexane dioctyl phthalate.
Description
technical field [0001] The invention relates to a device and method for preparing dioctyl 1,4-cyclohexanedicarboxylate. The product is suitable for food preservation film, food sealing inner pad, sports and leisure products, sealant, shower curtain, footwear, Sensitive soft PVC products such as non-slip mats, water pipes, wire and cable toys, food packaging, medical supplies, etc., can be used to produce toys for children under three years old, and can also be used for low-odor automotive cables, medical nutrition supply tubes, adhesive films, household food Contact gloves, environmentally friendly indoor wallpaper, decorative sheets, intravenous infusion tubes and medical blood bags, etc. Background technique [0002] Plasticizers are ubiquitous in life. In addition to plastic containers, tableware, daily necessities, and toys, plasticizers are also contained in plastic wrap. Plasticizers are widely used in industrial products such as food packaging, medical and sanitary p...
Claims
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Application Information
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