Neutralizing device for producing dioctyl terephthalate and using method
A technology for dioctyl phthalate and neutralization, which is applied in the field of neutralization devices for producing dioctyl terephthalate, can solve the working pressure of wastewater treatment process, low relative yield of products, large consumption of auxiliary materials, etc. problem, to achieve the effect of ingenious design, simple structure and convenient operation
Pending Publication Date: 2020-11-06
开封市九泓化工有限公司
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Problems solved by technology
[0003] In the traditional continuous production of dioctyl terephthalate, after esterification and flash evaporation, neutralization and water washing are required to neutralize and remove the acidic substances in the crude ester, and the neutralization reaction is used to generate water-soluble sodium The impurities in the crude ester are removed by using salt, and all the generated sewage is directly discharged into the sewage tank, and then enters the sewage treatment process, which indirectly causes a large consumption of auxiliary materials (acid, alkali) of the device, many side reactions, and low relative yield of the product. , large COD value
The production equipment using the traditional water washing and neutralization method usually produces a large amount of wastewater, which causes the waste of finished products and also causes the working pressure of the wastewater treatment process
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[0022] Such as figure 1 , 2 , 3, and 4, a neutralization device for producing dioctyl terephthalate, including a crude ester reactor 1 and a neutralization reactor 2, an outlet of the crude ester reactor 1 and a neutralization reactor 2 The inlet of is connected through the neutralization delivery pipeline 3, and the neutralization delivery pipeline 3 is provided with a neutralization delivery pump 4 and a neutralization delivery pipeline cut-off valve 34, and the top of the crude ester reactor 1 is provided with a flocculant feeding port 5 , the outlet end of the neutralization reactor 2 and the inlet end of the filter 6 are connected through a filter delivery pipeline 7, the filter delivery pipeline 7 is provided with a filter delivery pump 8, and the neutralization reactor 2 is provided with a soda ash water delivery device. The soda water delivery device includes a soda water mixing tank 9 , a soda water feeding pipe 35 is arranged on the top of the neutralization reactor...
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The invention relates to a neutralizing device for producing dioctyl terephthalate and a using method. The device comprises a crude ester reaction kettle and a neutralization reaction kettle; an outlet of the crude ester reaction kettle is communicated with an inlet of the neutralization reaction kettle through a neutralization conveying pipeline; and a neutralization conveying pump is arranged onthe neutralization conveying pipeline. The neutralizing device is characterized in that the top of the crude ester reaction kettle is provided with a flocculating agent feeding opening; the outlet end of the neutralization reaction kettle is communicated with the inlet end of a filtering machine through a filtering conveying pipeline; the filtering conveying pipeline is provided with a filteringconveying pump; and the neutralization reaction kettle is provided with a soda water conveying device. According to the neutralizing device and the using method thereof of the invention, the introduction of water is reduced, and the discharge of wastewater is reduced. The device is convenient to adjust and use, and has a wide market prospect.
Description
technical field [0001] The invention relates to the production field of dioctyl terephthalate, in particular to a neutralization device and a use method for producing dioctyl terephthalate. Background technique [0002] Dioctyl terephthalate, alias: DOTP. This product has been tested by "SGS" and does not contain phthalates (16P). It is an environmentally friendly new plasticizer that can replace DOP. DOTP is superior to DOP in both physical and mechanical properties. This product has outstanding electrical resistance, heat resistance, low temperature volatility, low glass transition temperature, low volatility, etc. It is an ideal plasticizer for producing excellent cable materials. Dioctyl terephthalate (DOTP) molecular formula: C24H38O4 is an excellent main plasticizer for polyvinyl chloride (PVC) plastics. Compared with the currently commonly used dioctyl terephthalate (DOP), it has the advantages of heat resistance, cold resistance, low volatility, anti-extraction, s...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B01J19/18B01J19/00B01J4/00C07C67/58C07C67/62C07C67/48C07C69/82
CPCB01J19/1862B01J19/0053B01J19/0006B01J4/007B01J4/008C07C67/58C07C67/62C07C67/48B01J2204/002C07C69/82
Inventor 丁志方张兴福王晓斌张高峰马留战李海强
Owner 开封市九泓化工有限公司