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Recovery and utilization of neutralized water in plasticizer DOTP production process

A production process and plasticizer technology, applied in water pollutants, filtration treatment, water/sewage treatment, etc., can solve the problems of complex process and difficult treatment, and achieve simple recovery process, high safety, and good separation effect. Effect

Inactive Publication Date: 2021-01-05
YIXING YANGYANG PLASTIC ADDITIVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly aims at the defects such as difficult processing and complex process existing in the prior art, and provides a new process and new method for water recovery and utilization in the production process of a plasticizer DOTP, so that it can be used during processing , to achieve the purpose of good separation effect, high recycling and turning waste into treasure

Method used

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  • Recovery and utilization of neutralized water in plasticizer DOTP production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put 2000kg of neutralized water into a stirred and pressure-resistant 3000L stainless steel still, start the stirring, turn on the steam in the jacket of the still, and slowly heat up to 78°C. Then turn on the vacuum unit, carry out distillation under the condition of vacuum degree of -0.97MPa, and collect fractions to obtain 118kg of material isooctyl alcohol.

[0023] After the distillation is completed, add 6 kg of inorganic filter agent into the distillation kettle, stir for 30 minutes, and then cool the material to 38°C.

[0024] Transfer the material in the cooled distillation pot to a filter for filtration, and filter out the inorganic filter to obtain a colorless and transparent filtrate.

[0025] Transfer the filtrate after decolorization and filtration into a thin-film evaporator, turn on the steam to heat to 95°C, and turn on the vacuum unit at the same time, and evaporate and concentrate the filtrate under the vacuum degree of -0.85MPa. When tiny crystals ap...

Embodiment 2

[0030] Put 2200kg of neutralized water into a 3000L stainless steel still with stirring and pressure resistance, start the stirring, turn on the steam in the jacket of the still, and slowly heat up to 80°C. Then turn on the vacuum unit, carry out distillation under the state of vacuum degree of -0.96MPa, collect fractions to obtain 129kg of material iso-octanol.

[0031] After the distillation is completed, add 6.5kg of inorganic filter agent into the distillation kettle, stir for 30min, and then cool the material to 36°C.

[0032] Transfer the material in the cooled distillation pot to a filter for filtration, and filter out the inorganic filter to obtain a colorless and transparent filtrate.

[0033] Transfer the filtrate after decolorization and filtration into a thin-film evaporator, turn on the steam to heat to 96°C, and turn on the vacuum unit at the same time, and evaporate and concentrate the filtrate under the state of vacuum degree of -0.86MPa. When tiny crystals app...

Embodiment 3

[0038] Put 2500kg of neutralized water into a stirred and pressure-resistant 3000L stainless steel still, start the stirring, turn on the steam in the jacket of the still, and slowly heat up to 81°C. Then turn on the vacuum unit, carry out distillation under the state of vacuum degree of -0.98MPa, collect fractions to obtain 142kg of material iso-octanol.

[0039] After the distillation is completed, add 7kg of inorganic filter agent into the distillation kettle, stir for 30min, and then cool the material to 38°C.

[0040] Transfer the material in the cooled distillation pot to a filter for filtration, and filter out the inorganic filter to obtain a colorless and transparent filtrate.

[0041] Transfer the filtrate after decolorization and filtration into a thin-film evaporator, turn on the steam and heat it to 97°C, and at the same time turn on the vacuum unit, and evaporate and concentrate the filtrate at a vacuum degree of -0.84MPa. When tiny crystals appear on the sight gl...

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Abstract

The invention belongs to the field of chemical engineering, particularly relates to a technology for recycling neutralized water, and provides a method for recycling neutralized water in the production process of a plasticizer DOTP mainly aiming at the plasticizer industry. The invention provides a process for recovering and utilizing neutralized water in the production process of a plasticizer DOTP (Dioctyl Terephthalate). The process comprises the following specific operation flows: distilling, decolorizing, filtering, concentrating, crystallizing, filter-pressing and drying. The method provided by the invention has the advantages of simple production process, high safety and low production cost, and achieves the purposes of good separation effect, high recycling rate and turning waste into wealth.

Description

technical field [0001] The invention belongs to the field of chemical industry, specifically relates to the recovery technology of neutralized water, and mainly aims at the plasticizer industry, and provides the recovery and utilization of neutralized water in the production process of a plasticizer DOTP. Background technique [0002] Plasticizer is a substance added to increase the plasticity, fluidity and flexibility of the finished product when processing high polymers such as rubber, plastics, and coatings. The world's largest producer and consumer country. DOTP (dioctyl terephthalate) is a plasticizer with excellent performance. It is a non-toxic, green and environmentally friendly non-phthalic plasticizer. It has good cold resistance, heat resistance, extraction resistance, and electrical insulation. , Low temperature softness, low volatility and high plasticizing efficiency. DOTP (dioctyl terephthalate) as the main plasticizer can replace DOP (dioctyl phthalate), an...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F101/10C02F103/36
CPCC02F9/00C02F1/06C02F1/281C02F1/001C02F1/08C02F2101/10C02F2103/36
Inventor 杭春涛杨健
Owner YIXING YANGYANG PLASTIC ADDITIVE
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