Preparation method of calcium zincate and calcium zincate reclaiming agent at normal temperature

A technology of calcium zincate and desulfurizer, applied in chemical instruments and methods, separation methods, refined hydrocarbon oil, etc., can solve the problems of not providing positive effects, etc., and achieve the effects of improving production safety, reducing costs, and high yield

Active Publication Date: 2008-10-22
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it needs NaOH or KOH to provide an alkaline environment. This part of the alkali does not provide a positive effect on the product. After the product is produced, it needs to be washed. If the washing is not clean, new impurities will be introduced; this method also needs 0.5-1.5% 400-800-mesh calcium zincate crystals as seeds

Method used

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  • Preparation method of calcium zincate and calcium zincate reclaiming agent at normal temperature
  • Preparation method of calcium zincate and calcium zincate reclaiming agent at normal temperature
  • Preparation method of calcium zincate and calcium zincate reclaiming agent at normal temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 151.5 grams of Zn (NO 3 ) 2 ·6H 2 O, put in a 1000ml stirred reactor, add 200ml of water, stir at room temperature until the zinc salt is completely dissolved. Then weigh 58.2 grams of Ca(OH) 2 Put the powder in a 400ml beaker, add 200ml water to make Ca(OH) 2 slurry. Ca(OH) 2 The slurry is slowly added to the zinc salt solution until the addition is complete. Stirring was continued for one hour.

[0041] Filter the precipitate, wash the precipitate three times with 600ml water (each 200ml); the filter cake is dried to obtain the former powder of calcium zincate, which is determined by XRD ( figure 1 ) whose phase is extremely pure CaZn 2 (OH) 6 2H 2 O.

[0042] The calcium zincate raw material was tableted and granulated, and a sample of 40-60 mesh was screened out, and the 4.02% standard H 2 S gas (base gas is high-purity N 2 ), airspeed 3000h -1 1. The one-time breakthrough sulfur capacity is 35.2% at room temperature of 20°C.

Embodiment 2

[0044] Weigh 18.0 grams of calcium zincate in Example 1, 2.0 grams of squash gum, 0.5 grams of kaolin, 0.5 grams of cement, 2.0 grams of barite powder and an appropriate amount of water, and shape it on a small twin-screw extruder to extrude a Ф4 bar-shaped desulfurization agent, and evaluate the sulfur capacity after drying.

[0045] The obtained desulfurizer has a lateral compressive strength of 120N / cm, a bulk specific gravity of 0.90 g / ml, and is powdered to 40-60 meshes, and is prepared with 4.02% standard H 2 S gas (base gas is high-purity N 2 ), airspeed 3000h -1 1. The one-time breakthrough sulfur capacity is 25.1% at room temperature of 20°C.

Embodiment 3

[0047] Weigh 20.0 grams of calcium zincate in Example 1, 3.0 grams of squash gum, 1.0 grams of kaolin and an appropriate amount of water, and shape it on a small twin-screw extruder to extrude a strip-shaped desulfurizer of Ф4, and evaluate the sulfur capacity after drying. The obtained desulfurizer has a lateral compressive strength of 130N / cm, a bulk specific gravity of 0.82 g / ml, is powdered to 40-60 mesh, and is prepared with 4.02% standard H 2 S gas (base gas is high-purity N 2 ), airspeed 3000h -1 1. The one-time breakthrough sulfur capacity is 28.6% at room temperature of 20°C.

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Abstract

The invention provides a calcium zincate and a method for preparing normal-temperature desulfurizer of the calcium zincate. The calcium zincate preparation method provided by the invention requires no crystal seeds, is directly formed, has simple operation, high yield and low cost and can be used for large-scale industrialized production. The desulfurizer provided by the invention consists of calcium zincate structural promoter. The desulfurizer of the invention reduces the cost and improves the production safety; furthermore, the desulfurization effect of the desulfurizer is much better than that of traditional normal-temperature desulfurizer and the sulfur capacity can reach 35.2%.

Description

technical field [0001] The present invention relates to the preparation method of calcium zincate and calcium zincate normal temperature desulfurizer, especially relates to the fine desulfurization of various gaseous and liquid materials at normal temperature in the field of petrochemical industry 2 Calcium zincate of S and preparation method of calcium zincate normal temperature desulfurizer. Background technique [0002] At present, zinc oxide is widely used as a desulfurizing agent in the desulfurization of various raw materials in petrochemical industry and industrial gas. The commercially available products are divided into two categories: high temperature desulfurizer and normal temperature desulfurizer. The high-temperature zinc oxide desulfurizer has a high sulfur capacity when desulfurized at high temperature (350-400°C), but the sulfur capacity of the normal-temperature desulfurizer is greatly reduced when desulfurized at room temperature, and its sulfur capacity i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/52C07C7/148C07C7/12C10G25/00
Inventor 刘振义刘凤仁喻永生毛文军
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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