Method for producing silica carrier, and silica carrier

Patent metadata

Field	Value
Publication number	US-2020238255-A1
Application number	US-201816639922-A
Country	US
Kind code	A1
Filing date	Sep 3, 2018
Priority date	Sep 5, 2017
Publication date	Jul 30, 2020
Grant date	—

Abstract

A method for producing the silica carrier which includes kneading fumed silica obtained by a combustion method, silica gel obtained by a gel method, and colloidal silica obtained by a sol-gel method or a water glass method, molding the resulting kneaded product, and calcining the resulting molded body. The silica carrier has, in the measurement of pore size distribution, mesopores with a pore size of 2 to 50 nm and macropores with a pore size of more than 50 nm and 1,000 nm or less.

First claim

1 . A method for producing a silica carrier, comprising kneading fumed silica obtained by a combustion method, silica gel obtained by a gel method, and colloidal silica obtained by a sol-gel method or a water glass method, molding the resulting kneaded product, and calcining the resulting molded body.

2 . The method for producing a silica carrier according to claim 1 , wherein the blending amount of fumed silica is from 5 to 50 parts by mass, the blending amount of silica gel is from 40 to 90 parts by mass, and the blending amount of the solid content of colloidal silica is from 5 to 30 parts by mass.

3 . The method for producing a silica carrier according to claim 1 , wherein the calcining temperature is from 300 to 1,000° C.

4 . A silica carrier having, in the measurement of pore size distribution, mesopores with a pore size of 2 to 50 nm and macropores with a pore size of more than 50 nm and 1,000 nm or less.

5 . The silica carrier according to claim 4 , wherein in the pore size distribution by mercury intrusion porosimetry, the pore volume of macropores is from 0.05 to 0.50 cc/g.

6 . The silica carrier according to claim 4 , wherein the BET specific surface area is from 200 to 500 m 2 /g.

7 . The silica carrier according to claim 4 , wherein the bulk density is from 300 to 700 g/L.

8 . The silica carrier according to claim 4 , wherein the average pore size of mesopores by the BJH method is from 3 to 16 nm.

9 . The silica carrier according to claim 4 , wherein the particle diameter is from 2 to 8 mm.

10 . (canceled)

11 . A silica carrier having, in the measurement of pore size distribution, mesopores with a pore size of 2 to 50 nm and macropores with a pore size of more than 50 nm and 1,000 nm or less, obtained by the method according to claim 1 .

Assignees

• Showa Denko Kk

Inventors

• Oguchi Wataru
• Yamashita Katsuhiko
• Kimura Toshihiro
• Shimono Daiki

Classifications

• B01J35/32

  Bulk density · CPC title

• B01J35/40

  characterised by dimensions, e.g. grain size (in a colloidal state B01J35/23; crystallite size B01J35/77) · CPC title

• B01J6/001

  Calcining · CPC title

• B01J37/04

  Mixing {(B01J37/0009, B01J37/0018 take precedence)} · CPC title

• C01B33/14

  Colloidal silica, e.g. dispersions, gels, sols · CPC title