Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for preparing hydrotalcite-like compound with large specific surface area

A technology of hydrotalcite compound and large specific surface, applied in the fields of aluminum compound, chemical instrument and method, inorganic chemistry, etc., can solve the problems of inability to obtain ultra-thin HTLs powder, short process, etc., and achieve uniform size, low cost, and process The effect of simple process

Inactive Publication Date: 2013-12-25
BEIJING UNIV OF CHEM TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, ultra-thin HTLs powder cannot be obtained by swelling and exfoliation technology
At present, there is no report on the production technology of large specific surface HTLs with short process, simple process and suitable for industrial production.

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
  • Method for preparing hydrotalcite-like compound with large specific surface area
  • Method for preparing hydrotalcite-like compound with large specific surface area
  • Method for preparing hydrotalcite-like compound with large specific surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Prepare 50mlMgCl 2 The concentration is 0.3mol / L, AlCl 3 A mixed salt solution A with a concentration of 0.1mol / L;

[0023] (2) Prepare 50mlNa 2 CO 3 Concentration is 0.2mol / L, NaOH concentration is 0.64mol / L mixed alkali solution B;

[0024] (3) preparation of 50ml polyethylene glycol (PEG-1000) concentration is solution C of 6g / L;

[0025] (4) At room temperature, add A, B, and C solutions dropwise to 50ml of deionized water simultaneously under stirring conditions, raise the temperature to 95°C after the dropwise addition, keep the temperature for 6 hours, then cool to room temperature, and wash the precipitate with water to the pH value Less than 8, filter and dry. Obtain a thickness of 12.1 nanometers and a BET specific surface area of ​​150.5m 2 / g of HTLs products.

Embodiment 2

[0027] (1) Prepare 50mlMgCl 2 The concentration is 0.3mol / L, AlCl 3 A mixed salt solution A with a concentration of 0.1mol / L;

[0028] (2) Prepare 50mlNa 2 CO 3 Concentration is 0.2mol / L, NaOH concentration is 0.64mol / L mixed alkali solution B;

[0029] (3) preparation of 50ml polyethylene glycol (PEG-1000) concentration is solution C of 8g / L;

[0030] (4) At room temperature, add A, B, and C solutions dropwise to 50ml of deionized water simultaneously under stirring conditions, raise the temperature to 95°C after the dropwise addition, keep the temperature for 6 hours, then cool to room temperature, and wash the precipitate with water to the pH value Less than 8, filter and dry. HTLs products with a thickness of 10.8 nanometers and a BET specific surface area of ​​160.5 m2 / g were obtained.

Embodiment 3

[0032] (1) Prepare 50mlMgCl 2 The concentration is 0.3mol / L, AlCl 3 A mixed salt solution A with a concentration of 0.1mol / L;

[0033] (2) Prepare 50mlNa 2 CO 3 Concentration is 0.2mol / L, NaOH concentration is 0.64mol / L mixed alkali solution B;

[0034] (3) preparation of 50ml polyethylene glycol (PEG-4000) concentration is solution C of 4g / L;

[0035] (4) At room temperature, add A, B, and C solutions dropwise to 50ml of deionized water simultaneously under stirring conditions, raise the temperature to 95°C after the dropwise addition, keep the temperature for 6 hours, then cool to room temperature, and wash the precipitate with water to the pH value Less than 8, filter and dry. The obtained thickness is 13.9 nanometers, and the BET specific surface area is 145.4m 2 / g of HTLs products.

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 invention relates to a method for preparing a hydrotalcite-like compound with a large surface area. The method is based on a double-dripping method, the thickness of a laminate is suppressed by means of adding polyethylene glycol, and accordingly the thin platy hydrotalcite-like compound with the large specific surface area and narrow particle size distribution is prepared and is an ideal catalytic precursor material. In addition, the method for preparing the hydrotalcite-like compound is simple in technological process, the hydrotalcite-like compound is prepared under normal pressure, cost is low, and special equipment is omitted.

Description

technical field [0001] The invention relates to a method for preparing a hydrotalcite-like compound with a large specific surface area, and belongs to the field of preparation of inorganic non-metallic functional materials. Background technique [0002] Hydrotalcite-like Compounds (HTLs for short), also known as composite metal hydroxides (Layered Double Hydroxides, LDHs for short) or anionic clays, are composed of positively charged host laminates ([M II 1-x m III x (OH) 2 ] x+ ) and interlayer guest hydrated anions ((A n- ) x / n ·yH 2 O) is a general term for a class of anionic compounds with a supramolecular structure, and its chemical composition can be expressed as [M II 1-x m III x (OH) 2 ] x+ (A n- ) x / n ·yH 2 O, usually abbreviated as M II m III -A-LDHs, where M II and M III represent divalent and trivalent metal ions, respectively, A n- Represents interlayer anions. The host layer tunability and interlayer guest anion exchangeability are the mai...

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): C01F7/00
Inventor 吕志田雨宋家庆徐向宇
Owner BEIJING UNIV OF CHEM TECH