Production method for alkoxysilanes

Patent metadata

Field	Value
Publication number	US-2016002271-A1
Application number	US-201414772741-A
Country	US
Kind code	A1
Filing date	Mar 5, 2014
Priority date	Mar 7, 2013
Publication date	Jan 7, 2016
Grant date	—

Abstract

Provided is a method for efficiently producing alkoxysilanes that are useful as various functional chemicals. In order to produce alkoxysilanes efficiently, an ethoxy- or methoxysilane and an alcohol are caused to react using, as a catalyst, for instance an inorganic solid acid having a regular-pore and/or layered structure. Zeolites, montmorillonites or the like can be used as the inorganic solid acid. When a zeolite is used as the catalyst, the silica/alumina ratio of the zeolite ranges preferably from 5 to 1000. The reaction can be promoted through irradiation of microwaves.

First claim

What is claimed is:

1 . A method for producing alkoxysilanes, comprising a reaction step of reacting an alkoxysilane having an ethoxy group or a methoxy group, and an alcohol, in the presence of a catalyst, wherein
the alkoxysilane having an ethoxy group or methoxy group is an alkoxysilane represented by Formula (I); the alcohol is an alcohol represented by Formula (II); the catalyst is a solid acid catalyst; and an alkoxysilane obtained in the reaction step is an alkoxysilane represented by Formula (III):
R 1 p R 2 q R 3 r Si(OR 4 ) 4−(p+q+r)   (I)

(In Formula (I), p, q, r and p+q+r are integers ranging from 0 to 3; R 1 , R 2 and R 3 are each independently a hydrocarbon group having 1 to 23 carbon atoms, or a hydrogen atom; R 4 is independently an ethyl group or a methyl group; and in a case where R 1 , R 2 and R 3 are hydrocarbon groups, some of the hydrogen atoms of the hydrocarbon groups may be substituted by groups that do not participate in the reaction);
ROH  (II)

(In Formula (II), R is a hydrocarbon group having 1 to 23 carbon atoms, and some of the hydrogen atoms in the hydrocarbon group may be substituted by groups that do not participate in the reaction);
R 1 p R 2 q R 3 r Si(OR 4 ) 4−(p+q+r)−m (OR) m   (III)

(In Formula (III), the meanings of p, q and r, and R 1 , R 2 , R 3 , R 4 and R are identical to those above; and m is an integer ranging from 1 to 4−(p+q+r)).

2 . The method for producing alkoxysilanes according to claim 1 , wherein the solid acid catalyst is an inorganic solid acid having a regular-pore and/or layered structure.

3 . The method for producing alkoxysilanes according to claim 2 , wherein the inorganic solid acid is a zeolite and/or a montmorillonite.

4 . The method for producing alkoxysilanes according to claim 3 , wherein the zeolite has a silica/alumina ratio (substance amount ratio) ranging from 5 to 1000.

5 . The method for producing alkoxysilanes according to claim 3 , wherein the zeolite is at least one zeolite type selected from the group consisting of USY type, beta type, Y type, mordenite type and ZSM-5 type.

6 . The method for producing alkoxysilanes according to claim 3 , wherein an alkoxysilane, for which m in the Formula (III) is 1, is produced as a main product.

7 . The method for producing alkoxysilanes according to claim 3 , wherein an alkoxysilane is produced in which R in the Formula (III) is a tertiary alkyl group.

8 . The method for producing alkoxysilanes according to claim 1 , wherein the reaction step is performed under irradiation of microwaves.

Assignees

• Nat Inst Of Advanced Ind Scien

Inventors

• Yamashita Hiroshi
• Hatori Makiko
• Yoshinaga Michiyo

Classifications

• C07F7/1892 Primary

  by reactions not provided for in C07F7/1876 - C07F7/1888 · CPC title

• B01J2229/32

  Reaction with silicon compounds, e.g. TEOS, siliconfluoride · CPC title

• B01J29/40

  of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively · CPC title

• C07F7/1804

  Compounds having Si-O-C linkages (Si-O-acyl linkages C07F7/1896) · CPC title

• B01J29/7007

  Zeolite Beta · CPC title