Preparation of deacidification and dehydration adsorbent in ester compounds and application thereof

Abstract

The invention discloses preparation of a deacidification and dehydration adsorbent in ester compounds and an application thereof. The adsorbent is composed of the following raw materials: 100 parts ofgamma-Al2O3, 5-15 parts of a binder, 15-45 parts of magnesium oxide micro powder, 5-15 parts of a magnesium-containing compound, 0.5-5 parts of a pore-forming agent and 10-35 parts of water. The method comprises the following steps: mixing and grinding gamma-Al2O3, the binder, magnesium oxide micro powder, the magnesium-containing compound and the pore-forming agent for 0.5-5 hours according tothe formula ratio, and adding the pore-forming agent according to a formula ratio, mixing and grinding for 0.5-3 hours; adding a formula amount of water, homogenizing, carrying out extrusion molding on the material, drying at room temperature for 0.5-10 hours, and then drying at 50-200 DEG C for 1-10 hours; and finally, roasting at 500-600 DEG C for 1-6 hours, cooling and drying to obtain the adsorbent capable of simultaneously deacidifying and dehydrating in the ester compound. The adsorbent is high in adsorption and deacidification activity, short in reaction time and high in utilization rate; the adsorbent can be repeatedly used, so that the environmental pollution caused by retreatment after the adsorbent is inactivated is avoided, and the production cost is reduced.

Description

technical field [0001] The invention relates to the preparation and application of an adsorbent, in particular to the preparation and application of an adsorbent for deacidification and dehydration in ester compounds. Background technique [0002] Esters are a class of widely used organic compounds, which can be used as various solvents, spices, coatings, pesticides, pharmaceutical intermediates, etc., and have a wide range of uses. [0003] Esters are generally prepared by esterification with corresponding acids and alcohols. Esters are easy to decompose during long-term storage, resulting in excessive acid value, and easy to absorb water. The presence of water accelerates the decomposition of the product, making the product more unstable. In addition, the residual acid and water will cause unnecessary troubles for subsequent product use, such as catalyst poisoning, reduced reaction yield, and difficult reaction. For example, after 2 months of normal storage of tert-butyl...

AI Technical Summary

Problems solved by technology

Esters are easy to decompose during long-term storage, resulting in excessive acid value, and easy to absorb water. The presence of water accelerates the decomposition of the product, making the product more unstable

In addition, the residual acid and water will cause unnecessary troubles to the subsequent product use, such as catalyst poisoning, lower reaction yield, difficult reaction, etc.

For example, after 2 months of normal storage of tert-butyl bromoacetate, the acid value reaches 500ppm. Some products require the acid value to be less than 50ppm, so it is difficult to meet the requirements after a period of storage. How to remove these acids and water is a very realistic problem. The problem

[0004] The traditional method of acid removal generally adopts the method of neutralization and distillation. Waste water will be generated during the operation of this method. Achieving a certain effect, but also adding additional operations

Using the distillation method, since the ester and a small amount of water will be distilled out of the reactor at the same time, the water content of the ester compound is generally above 150ppm, but many products require a water content below 50ppm, and many electronic products are sensitive to the ester used. Higher requirements make it difficult for existing processes to meet the requirements, so it is necessary to develop low-cost operating processes to improve product quality and increase added value