SILVER IMPREGNATION SOLUTION CONTAINING HIGH-BOILING OXYGENATED ADDITIVE AND ITS USE IN ETHYLENE OXIDE CATALYST PREPARATION

• Main Author: BELETSKIY EVGENY
• Format: Patent
• Language: Chinese; English
• Published: 18.09.2020
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

A silver impregnation solution contains: (i) silver ions, (ii) a polar organic additive containing two to four carbon atoms and two to four functional groups selected from hydroxy, carboxylic acid, and amine groups, provided that a carboxylic acid group can only be present along with a hydroxy or amine group, and provided that an amine group can only be present along with a hydroxy or carboxylic acid group; and (iii) water;, wherein components (i) and (ii) are water soluble and dissolved in the impregnation solution. Also described herein is a method for producing a catalyst effective in the oxidative conversion of ethylene to ethylene oxide, the method comprising subjecting a refractory carrier impregnated with the above-described silver impregnation solution to a calcination process anda method for converting ethylene to ethylene oxide by use of the foregoing silver catalyst, as produced by the above-described silver impregnation solution. 一种银浸渍溶液包含：(i)银离子，(ii)含有2-4个碳原子和2-4个选自羟基、羧酸基和胺基的官能团的极性有机添加剂，条件是羧酸基只能与