Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Naphthalene removal method for cracking C9+ hydrogenation solvent oil and low-naphthalene aromatic solvent oil

A solvent oil and denaphthalene removal agent technology, which is applied in the fields of refined hydrocarbon oil, petroleum industry, liquid carbon-containing fuels, etc., can solve the problems of lower solubility of decalin than aromatic hydrocarbons, high cost, high energy consumption, and increased number of trays, etc. Achieve significant social and economic benefits, less equipment corrosion and environmental pollution, and continuous operation

Active Publication Date: 2018-04-20
NINGBO CESTOIL ADVANCED MATERIAL CO LTD
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are usually two methods for removing naphthalene in industry: one is rectification, but due to the cracking of C 9+ The components of hydrogenated solvent oil have similar boiling points, so it is more difficult to separate by rectification; to improve the separation efficiency, it is necessary to increase the number of trays, and the cost and energy consumption are high
The second is to crack C 9+ Hydrogenated solvent oil is deeply hydrogenated to tetrahydronaphthalene, but this method has high cost and poor selectivity, because this method requires the use of noble metal catalysts, and noble metal catalysis can easily lead to excessive hydrogenation of naphthalene into saturated decahydronaphthalene , the solubility of decahydronaphthalene is not as good as that of aromatic hydrocarbons, and it is easy to separate out from solvent oil, which greatly limits its application

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Add 900 kg of water into the enamel kettle, then add 100 kg of concentrated sulfuric acid with a concentration of 98wt% in batches, and then add 200 kg of sulfuric acid with a specific surface area of ​​800m 2 / g, the surface hydroxyl density is 6.1 / nm 2 (measured by infrared spectroscopy, the same below), stirred at room temperature for 2 hours, filtered, and the filter cake was purged with dry hot nitrogen at 120°C for 8 hours to obtain a loaded naphthalene remover.

[0041] Fill the loaded naphthalene removal agent into the fixed bed again, set the fixed bed temperature to be 100°C, and crack C containing naphthalene 130ppm 9+ Hydrogenated solvent oil for 2h -1 Naphthalene-removal treatment is carried out by flowing through a fixed bed at a space velocity of 5 ppm (recorded by gas chromatography, the same below), and the low-naphthalene aromatic hydrocarbons with a chromaticity of 28 (recorded by the Saybolt colorimeter method, the same below) are obtained. Solvent...

Embodiment 2

[0044] Add 950 kg of water to the enamel kettle, then add 50 kg of concentrated sulfuric acid with a concentration of 98% in batches, and then add 200 kg of sulfuric acid with a specific surface area of ​​500m 2 / g, the surface hydroxyl density is 5.0 / nm 2 The modified silica gel was stirred at 50°C for 8 hours, filtered, and the filter cake was purged with dry hot nitrogen at 150°C for 2 hours to obtain a supported naphthalene removal agent.

[0045] Loaded naphthalene removal agent is filled in the fixed bed again, and setting fixed bed temperature is 70 ℃, will contain the cracking C of naphthalene 160ppm 9+ Hydrogenated solvent oil for 10h -1 The space velocity of flowing through fixed bed carries out denaphthalene treatment, obtains the low naphthalene aromatic hydrocarbon solvent oil that naphthalene content is 8ppm, chromaticity is 28.

[0046] After one week of operation, the loaded naphthalene removal agent was taken out, soaked in water, filtered, and the filtrate ...

Embodiment 3

[0048] The specific surface area of ​​200 kg is 700m 2 / g, the surface hydroxyl density is 4.5 / nm 2 The modified activated carbon was added to 1000 kg of 8wt% dilute sulfuric acid, stirred at room temperature for 6 hours, filtered, and the filter cake was purged with dry hot nitrogen at 140°C for 6 hours to obtain a loaded naphthalene remover.

[0049] Loaded naphthalene removal agent is filled in the fixed bed again, and setting fixed bed temperature is 85 ℃, will contain the cracking C of naphthalene 150ppm 9+ Hydrogenated solvent oil for 5h -1 The space velocity flows through the fixed bed to carry out the denaphthalene treatment, and the naphthalene content is 5.5ppm, and the chromaticity is 29 low-naphthalene aromatic solvent oil.

[0050] After one week of operation, take out the loaded naphthalene removal agent, soak in water, filter, cook the filtrate at 180°C for 1 hour, then extract with toluene, dry the extract to obtain light yellow crude naphthalene. The filter...

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

PropertyMeasurementUnit
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The preparation method comprises a naphthalene removal method for cracking C9+ hydrogenation solvent oil and low-naphthalene aromatic solvent oil. The naphthalene removal method comprises the following steps: soaking a carrier with hydroxyl groups on the surface in a dilute sulfuric acid solution, performing filtration to obtain a solid, and performing drying to obtain a supported naphthalene removal agent, wherein the carrier with the hydroxyl groups on the surface has the specific surface area of 500-800 m<2> / g and the surface hydroxyl density of 4.5-6.1 / nm<2>; filling a fixed bed with the supported naphthalene removal agent; and performing naphthalene removal treatment on the cracking C9+ hydrogenation solvent oil via the fixed bed filled with the supported naphthalene removal agent atthe air speed of not higher than 20 h<-1> to obtain the low-naphthalene aromatic solvent oil. The naphthalene removal method for cracking C9+ hydrogenation solvent oil is simple in process and high innaphthalene removal efficiency, can be continually operated, causes little corrosion to equipment and little pollution to the environment, and avoids the problems of poor rectification and deep hydrogenation separation effect and high cost. The low-naphthalene aromatic solvent oil subjected to naphthalene removal by the naphthalene removal method is light in color, strong in dissolving capacity,contains extremely low naphthalene (10 ppm or below), conforms to the European and American standards and can bring about remarkable social and economical benefits through large-scale production and application.

Description

technical field [0001] The invention relates to the technical field of industrial naphthalene removal, in particular to a cracking C 9+ Method for removing naphthalene from hydrogenated solvent oil and solvent oil with low naphthalene aromatics. Background technique [0002] In recent years, with the rapid development of my country's petroleum and chemical industries, the demand for solvent oil continues to grow. cleavage C 9+ Distillate is a by-product of petroleum cracking to ethylene to crack C 9+ Hydrogenation of raw materials to produce aromatic solvent oil is the optimal utilization of ethylene cracking by-products, and can also greatly reduce the production cost of aromatic solvent oil, which can generate huge social and good economic benefits. [0003] cleavage C 9+ The distillate is rich in components such as alkylbenzenes, aromatics, dienes, naphthalene and its homologues (hereinafter collectively referred to as naphthalene), sulfur-containing compounds, etc. C...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C10G25/00C10G25/03C10L1/04C07C7/12C07C15/24
Inventor 严斌熊靓
Owner NINGBO CESTOIL ADVANCED MATERIAL CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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