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 ut

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021]Example 1

[0022]Put 2000kg of neutralized water into a 3000L stainless steel distillation kettle with stirring and pressure resistance, turn on the stirring, turn on the steam in the jacket of the distillation kettle, and slowly heat to 78°C. Then turn on the vacuum unit, perform distillation under a vacuum of -0.97MPa, and collect fractions to obtain 118kg of isooctyl alcohol.

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

[0024]The materials in the cooled distillation still are transferred to a filter for filtration, and the inorganic filter is filtered out 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℃, and turn on the vacuum unit at the same time. Under the state of -0.85MPa, the filtrate is evaporated and concentrated. When tiny crystals app...

Example Embodiment

[0029]Example 2

[0030]Put 2200kg of neutralized water into a 3000L stainless steel distillation kettle with stirring and pressure resistance, turn on the stirring, turn on the steam in the jacket of the distillation kettle, and slowly heat to 80°C. Then turn on the vacuum unit, perform distillation under the state of -0.96MPa vacuum, collect fractions to obtain 129kg of isooctyl alcohol.

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

[0032]The materials in the cooled distillation still are transferred to a filter for filtration, and the inorganic filter is filtered out to obtain a colorless and transparent filtrate.

[0033]Transfer the filtrate after decolorization and filtration to the thin film evaporator, turn on the steam to heat to 96℃, and turn on the vacuum unit at the same time. Under the state of -0.86MPa, the filtrate will be evaporated and concentrated. When tin...

Example Embodiment

[0037]Example 3

[0038]Put 2500 kg of neutralized water into a 3000L stainless steel distillation kettle with stirring and pressure resistance, turn on the stirring, turn on the steam jacket of the distillation kettle, and slowly heat to 81°C. Then turn on the vacuum unit, perform distillation at a vacuum of -0.98MPa, and collect fractions to obtain 142kg of isooctyl alcohol.

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

[0040]The materials in the cooled distillation still are transferred to a filter for filtration, and the inorganic filter is filtered out to obtain a colorless and transparent filtrate.

[0041]Transfer the filtrate after decolorization and filtration into a thin film evaporator, turn on the steam to heat to 97°C, and turn on the vacuum unit at the same time. Under the state of -0.84MPa vacuum, the filtrate will be evaporated and concentrated. When tiny crystals appear on the...

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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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