Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Technology for comprehensively treating heavy oil produced in hydration-method cyclohexanone production process

A technology for comprehensive treatment and cyclohexanone is applied in the field of heavy oil produced in the process of comprehensive treatment of cyclohexanone by hydration method. , the effect of reducing pollution

Active Publication Date: 2018-11-23
CHINA TIANCHEN ENG
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The heavy oil mainly contains cyclohexanone, cyclohexanol, phenol, 1-cyclohexenyl cyclohexene, cyclohexyl ether, 2-cyclohexylidene cyclohexanone, 2-(1-cyclohexenyl) Cyclohexanone and 4-cyclohexylphenol, etc., are difficult to separate and recover due to their complex components and large molecular weight. At present, they are mostly burned in the device, and some companies sell them as by-product fuel oil, and the price is relatively low. Contains toxic and harmful substances, causing more secondary hazards and polluting the environment. Strictly speaking, direct sales are not allowed

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Technology for comprehensively treating heavy oil produced in hydration-method cyclohexanone production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A process for comprehensively treating the heavy oil produced in the hydration method for producing cyclohexanone, comprising the steps of:

[0032] The by-product heavy oil 2000kg / h of the hydration method cyclohexanone plant is sent to the primary fractionation tower T-101. It is -0.08MPaG, and the number of theoretical plates is 40; the separation of the tower bottom of the primary separation tower T-101 obtains a component with a boiling point greater than phenol, which is sent to the intermediate component tower T-105 through the primary separation tower tank pump P-101, and the Phenol and light components with a boiling point lower than phenol are obtained from the top separation, and after passing through the condenser E-102 of the primary fractionation column and the reflux tank V-101 of the primary fractionation column, they are sent to the azeotropic distillation column T by the reflux pump P-102 of the primary fractionation column -102 Central.

[0033]The a...

Embodiment 2

[0040] A process for comprehensively treating heavy oil produced in the process of producing cyclohexanone through hydration, comprising the following steps: the process is the same as in Example 1.

[0041] The by-product heavy oil 3750kg / h of the hydration method cyclohexanone plant is sent to the primary fractionation tower T-101. It is -0.075MPaG, and the number of theoretical plates is 40; Azeotropic rectification column T-102 adopts the binary mixture of acetophenone and benzoic acid as entrainer, and flow rate is 3000kg / h, and wherein benzoic acid content is 10wt%, altogether The reflux ratio of the boiling distillation column T-102 is 4.8, the temperature at the top of the column is 61°C, the temperature at the bottom of the column is 101°C, the pressure is -0.097MPaG, and the number of theoretical plates is 40; the reflux ratio of the cyclohexanone column T-103 is 6. The temperature at the top of the tower is 67°C, the temperature at the bottom of the tower is 85°C, t...

Embodiment 3

[0044] A process for comprehensively treating heavy oil produced in the process of producing cyclohexanone through hydration, comprising the following steps: the process is the same as in Example 1.

[0045] The 4500kg / h of heavy oil produced by the hydration method cyclohexanone plant is sent to the primary fractionation tower T-101. It is -0.075MPaG, and the number of theoretical plates is 40; Azeotropic rectification tower T-102 adopts the binary mixture of acetophenone and benzoic acid as entrainer, and flow rate is 3600kg / h, and wherein benzoic acid content is 15wt%, altogether The reflux ratio of the boiling distillation column T-102 is 2, the temperature at the top of the column is 64°C, the temperature at the bottom of the column is 100°C, the pressure is -0.097MPaG, and the number of theoretical plates is 40; the reflux ratio of the cyclohexanone column T-103 is 3. The temperature at the top of the tower is 67°C, the temperature of the tower bottom is 85°C, the pressu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a technology for comprehensively treating heavy oil produced in a hydration-method cyclohexanone production process. The technology comprises the following steps: conveying a byproduct heavy oil of a hydration-method cyclohexanone device into the middle part of a primary separation tower; separating by a tower kettle of the primary separation tower to obtain a component witha boiling point greater than that of phenol and conveying the component into a middle component tower; separating at a tower top of the primary separation tower to obtain the phenol and a light component with the boiling point smaller than that of the phenol; conveying the phenol and the light component into the middle part of a co-boiling rectifying tower; obtaining a mixture of cyclohexanone and cyclohexanol at the tower top of the co-boiling rectifying tower, and conveying the mixture into the middle part of a cyclohexanone tower; separating by the tower kettle to obtain a highest-boiling-point azeotrope formed by the phenol and an azeotrope agent; conveying the highest-boiling-point azeotrope into the middle part of a phenol recycling tower; separating at the tower top of the cyclohexanone tower to obtain cyclohexanone and extracting the cyclohexanone; separating by the tower kettle to obtain the cyclohexanol and extracting the cyclohexanol as a product. According to the technology provided by the invention, cyclohexanone, cyclohexanol, phenol and dipolyketone products are obtained respectively by carrying out comprehensive recycling and utilization on the heavy oil; meanwhile, byproducts including chemical light oil and dreg oil are produced, the utilization rate of the byproduct heavy oil is improved, the operation cost of the device is reduced and the environment pollution is reduced.

Description

technical field [0001] The invention belongs to the field of chemical separation, and in particular relates to a process for comprehensively treating heavy oil produced in the process of producing cyclohexanone through hydration. Background technique [0002] The production route of adipic acid and caprolactam based on cyclohexene hydration method is the mainstream process in industrial production at present. In the refining process of cyclohexanone, in order to separate and obtain cyclohexanone and cyclohexanol with satisfactory purity, some light oil and heavy oil will be produced. Among them, light oil mainly contains n-pentane, n-hexane, methylcyclopentane, methylcyclopentene, benzene, cyclohexene, cyclohexane, methylcyclohexane, cyclohexanol and cyclohexanone, etc. Among them, the content of benzene, cyclohexane, cyclohexanone and cyclohexanol is relatively high, which can be recycled by simple rectification. At present, there are many research examples of light oil r...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C07C29/80C07C29/82C07C35/08C07C45/82C07C45/84C07C49/403C07C49/653C07C37/74C07C37/78C07C39/04C10G7/00C10G7/06C10G7/08B01D3/14
CPCB01D3/146C10G7/00C10G7/06C10G7/08C07C29/80C07C29/82C07C37/005C07C37/685C07C37/74C07C37/78C07C45/82C07C45/84C07C2601/16C07C2601/14C07C35/08C07C49/403C07C49/653C07C39/04
Inventor 柴永峰李碧柳刘新伟
Owner CHINA TIANCHEN ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com