Adsorbent used for deeply dewatering and prepared by modifying molecular sieve through metal salt and preparation method of adsorbent

Abstract

The invention discloses an adsorbent used for deeply dewatering and prepared by modifying a molecular sieve through metal salt. The adsorbent is high in dewatering depth, large in adsorption quantity and low in cost and the preparation method is simple. The adsorbent for deeply dewatering is prepared by modifying the molecular sieve through the metal salt, wherein the metal salt comprises cerous nitrate, zirconium nitrate and alkaline-earth metal nitrate. By taking a total mass of the modified molecular sieve as a reference, the mass percent of celerium is 0.05-15%; the mass percent of zirconium is 0.03-6%; the mass percent of other alkaline-earth metals is 0.05-8%.

Description

technical field [0001] The invention relates to an adsorbent and a preparation method, in particular to an adsorbent for deep dehydration of a metal salt modified molecular sieve type and a preparation method. Background technique [0002] In recent years, the development of science and technology is changing with each passing day. In daily life, various digital appliances such as mobile phones and flat-screen TVs have become an indispensable part of modern society. Technological progress of various electronic components. The development of electronic components is inseparable from the stable supply of various high-quality raw materials. Electronic gas, which is a variety of extremely high-purity gases required in the electronics industry, mainly plays the role of protective gas, reaction gas and carrier gas in the production of electronic components, and its quality directly affects the performance and reliability of electronic devices and yield. All kinds of electronic ...

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Problems solved by technology

[0004] Although the adsorption method has many advantages, due to the adsorption equilibrium process of adsorption, the use of commonly used adsorbents often has the problem of insufficient dehydration depth.

For example, the publication number is CN1704335A, and the patent titled "High Purity Ammonia Deep Dehydration Purification Method" reports a deep dehydration method to make NH 3 Through silica gel, 13X molecular sieve, and 3A molecular sieve three-stage adsorption and dehydration successively, and using 3A molecular sieve as the key adsorbent, it can only reduce the water content in ammonia to below 200ppb; The patent of "color-changing dehydrating agent and its preparation method" reports the use of silver salt modified 4A molecular sieve as a deep dehydrating agent. The disadvantage is that it can only remove the water in the gas to below 100ppb, far from reaching ultra-high purity gas. industrial production requirements