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

Zeolite molecular sieve adsorbent for separating p-cresol and m-cresol isomers and preparation method thereof

A technology of zeolite molecular sieve and zeolite molecular sieve powder, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of low polar selectivity separation coefficient of cresol isomers, complex equipment investment, etc., and achieve low equipment investment, The effect of simple process

Active Publication Date: 2019-11-12
SHANGHAI FUYU NEW MATERIAL TECH +2
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The adsorbent using the above-mentioned large-pore zeolite molecular sieve must adopt a simulated mobile device with a high-plate multi-stage separation effect due to the relatively low polar selectivity separation coefficient of meta-position and para-cresol isomers (usually lower than 5). Bed technology can achieve effective separation, complex equipment and high investment

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
  • Zeolite molecular sieve adsorbent for separating p-cresol and m-cresol isomers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] 1. Preparation of zeolite molecular sieve adsorbent.

[0015] Ion exchange treatment, with commercially available various structural types of zeolite molecular sieve former powder, process with common known technology, promptly use the ammonium chloride of 1 mole / liter concentration, or sodium chloride, or potassium chloride solution to liquid / Solid ratio 10 / 1, stirring at 90°C for 1 hour and then filtering and washing. After repeating this process 3 times, dry the product at 100-120°C to obtain various structural types of ammonium, sodium and potassium. Zeolite molecular sieve powder.

[0016] The forming and sieving of the adsorbent, using silica sol as a binder, respectively shape various structural types of ammonium-type, sodium-type and potassium-type zeolite molecular sieve powders into granules, and slightly pulverize them, and use a sampling sieve to sieve 20 -40 mesh particles, obtained ammonium-type, sodium-type and potassium-type zeolite molecular sieve ads...

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
boiling pointaaaaaaaaaa
adsorption capacityaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of zeolite molecular sieves, and particularly relates to a zeolite molecular sieve adsorbent for separating p-cresol and m-cresol isomers and a preparing method thereof. According to the zeolite molecular sieve adopted as the adsorbent, the opening aperture width of a main pore passage is 0.50-0.55 nm, the crystal framework density is 15.5-20.1 T / nm<3>, the mole ratio of silica to alumina in a crystal framework structure is 4 to all silicon, and structure type codes are EUO, FER, ITH, LAU, MEL, MFI, MFS, MTT, MWW, STI, STT, SZR, BRE, EAB, ERI, ITW, TUN, MER and RWR. When the adsorbent is used for adsorption separation of a gaseous mixture of p-cresol and m-cresol, the adsorption selectivity of the p-cresol relative to all cresol is 82.1-100%, and the highest adsorption amount of the p-cresol on the adsorbent can be 250.5 mg / g. Accordingly, adsorption separation of the p-cresol and the m-cresol can be achieved by an vapor-phase fixed bed adsorption separation process.

Description

technical field [0001] The invention belongs to the technical field of zeolite molecular sieves, in particular to a zeolite molecular sieve adsorbent for separating para-position and meta-cresol isomers and a preparation method thereof. Background technique [0002] The three cresol isomers, p-cresol, m-cresol, and o-cresol, are mainly derived from by-products of coking, oil shale dry distillation, city gas and chemical synthesis. As an important raw material, p-cresol can be used in industrial sectors such as pesticides, dyes, plastics and medicines, and also has important applications in synthetic resins, color film developers, adhesives, etc. The o-cresol in the cresol isomer mixture can be obtained by traditional distillation, while the boiling points of p-cresol and m-cresol are 201.9°C and 202.8°C respectively, so distillation separation is extremely difficult, but it can be separated by adsorption separation. [0003] The adsorption separation method usually utilizes...

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 Patents(China)
IPC IPC(8): B01J20/18B01J20/30
CPCB01J20/186
Inventor 龙英才魏小波郭娟
Owner SHANGHAI FUYU NEW MATERIAL TECH
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