KR940011424A - Method for producing carboxylic acid - Google Patents

Abstract

The preparation of aliphatic carboxylic acids having carbon number (n + 1) (n is an integer of 6 or less) can be carried out using copper, nickel, iridium, rhodium or cobalt dropping mordenite zeolite catalysts at elevated temperatures and pressures in the range of 15-200 bar. It can be achieved by contacting an aliphatic alcohol having a carbon number n or a reactive derivative thereof in the presence with carbon monoxide.

Description

Method for producing carboxylic acid

As this is a public information case, the full text was not included.

Claims (15)

The process is carried out at a temperature in the range from 300 to 600 ° C. and a pressure in the range from 15 to 200 bar, characterized in that the catalyst consists essentially of mordenite zeolites ion-exchanged or dipped with copper, nickel, iridium, rhodium or cobalt. A process for producing an aliphatic carboxylic acid having carbon number (n + 1) (n is an integer of 6 or less), wherein an aliphatic alcohol having a carbon number n or a reactive derivative thereof is contacted with carbon monoxide in the substantially absence of halogen or a derivative thereof. . The method of claim 1 wherein the aliphatic alcohol is methanol or a reactive derivative thereof. The process of claim 1 or 2, wherein the silica to alumina ratio of the mordenite zeolite is in the range of 10: 1 to 30: 1. The process according to claim 1 or 2, wherein the metal content of the catalyst is 0.5 to 10% by weight based on the total weight of the catalyst. The process of claim 3 wherein the metal content of the catalyst is from 0.5 to 10% by weight, based on the total weight of the catalyst. The process of claim 1 or 2, wherein the carbon monoxide gas and the methanol vapor are fed through a fixed or fluidized catalyst bed in the substantial absence of iodide. 4. The process of claim 3 wherein carbon monoxide gas and methanol vapor are fed through a fixed or fluidized catalyst bed in the substantial absence of iodide. The process of claim 4, wherein carbon monoxide gas and methanol vapor are supplied through a fixed or fluidized catalyst bed in the substantial absence of iodide. The process of claim 5 wherein carbon monoxide gas and methanol vapor are fed through a fixed or fluidized catalyst bed in the substantial absence of iodide. The process according to claim 1 or 2, wherein the aliphatic alcohol or reactive derivatives thereof and carbon monoxide are contacted with an alumina bed or silica-alumina bed immediately before contact with the catalyst bed. 4. The process of claim 3 wherein the aliphatic alcohol or reactive derivatives thereof and carbon monoxide are contacted with an alumina bed or silica-alumina bed immediately before contact with the catalyst bed. The method of claim 4, wherein the aliphatic alcohol or reactive derivatives thereof and carbon monoxide are contacted with an alumina bed or silica-alumina bed immediately before contact with the catalyst bed. The method of claim 6, wherein the aliphatic alcohol or reactive derivatives thereof and carbon monoxide are contacted with an alumina bed or silica-alumina bed immediately before contact with the catalyst bed. Carbon number n (n), characterized in that the silica to alumina ratio ranges from 10: 1 to 30: 1 and the zeolite consists essentially of mordenite zeolite ion-exchanged or loaded with copper, nickel, iridium, rhodium or cobalt. Is a catalyst for carbonylating an aliphatic alcohol having an integer of 6 or less) to an aliphatic carboxylic acid having carbon number (n + 1). The catalyst according to claim 14, wherein the metal content of the catalyst is 0.5 to 0% by weight based on the total weight of the catalyst. ※ Note: The disclosure is based on the initial application.