一、前言目前世界上关于甲醛的生产主要有两种催化反应过程:一种是在金属银催化剂上甲醇过量氧化生成甲醛,另一种是在铁-钼系催化剂上空气过量氧化生成甲醛。国内多采用第一种过程。所用的催化剂有浮石银和电解银两种。电解银较之浮石银的主要优点是:转化 I. Introduction At present, there are mainly two kinds of catalytic reaction processes in the world for the production of formaldehyde: one is the excessive oxidation of methanol to form formaldehyde on the metallic silver catalyst, and the other is the excessive oxidation of air to iron on the iron-molybdenum catalyst. Domestic use of the first process. The catalyst used is pumice silver and electrolytic silver two. Electrolytic silver pith than the main advantage of silver is: conversion