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Preparing method of high-purity carbon dioxide

A carbon dioxide, high-purity technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of polluting the environment, reducing the economic value of aquatic products, and not being utilized, achieving high calcium carbonate content and solving shell pollution , the effect of creating economic value

Inactive Publication Date: 2012-11-14
ZHANGZIDAO GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Except for some beautiful shells used in handicrafts, most of these discarded shells have not been utilized, which not only reduces the economic value of aquatic products, but also pollutes the environment

Method used

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  • Preparing method of high-purity carbon dioxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] High-purity carbon dioxide is prepared by reacting shells with pure hydrochloric acid. The specific reaction formula is as follows:

[0019] CaCO 3 +2HCl=CaCl 2 +CO 2 +H 2 o

[0020] Concrete preparation process: raw material hydrochloric acid: mass concentration is 30%; Shell (wherein CaCO 3 Content: 94% by weight); shells include all shells, such as oyster shells, clam shells, conch shells, scallop shells, abalone shells, single species of shells or mixed species of shells.

[0021] First, remove the soil and other sundries on the surface of the shells with clean water, and then crush them. The powdered shell powder is stored separately for later use. The particle size of the shells after crushing is controlled at 16-20 mesh, because the particle size is too large, stir during the reaction Inconvenient, the particle size is too small and will be ejected by air bubbles during the reaction. Take 1.06t shell particles (containing CaCO 3 1t) into the reactor, add 2...

Embodiment 2

[0024] Shells react with acetic acid

[0025] 2CH 3 COOH+CaCO 3 =(CH 3 COO) 2 Ca+H 2 O+CO 2

[0026] Raw materials: acetic acid: mass concentration 99%; shells: CaCO 3 Content 94% weight percent (with embodiment 1);

[0027] Adopt the preparation method described in embodiment 1, the specific ratio of raw materials is as follows: adopt 1.06t shell (containing CaCO 3 1t) consume 1.21t of 99% acetic acid, obtain 0.44t carbon dioxide gas, and crystallize to obtain 1.58t (CH 3 COO) 2 Ca·H 2 O and 0.01t water.

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Abstract

The invention discloses a preparing method of high-purity carbon dioxide. In the method, shell and acid are adopted as raw material to react according to the ratio of 1:2 to prepare carbon dioxide in one step, and the reaction ionic equation is as follows: CaCO3+2H+->Ca2++CO2+H2O. The invention has the effect and benefit of simple process flow, low cost and high purity of produced carbon dioxide. If the shell and the acid (which can also be waste acid) react, not only high-purity carbon dioxide can be produced, and by-product calcium salt can be obtained as well, which further creates economic value and solves the problem of shell pollution. The invention takes the shell as raw material to produce high-purity carbon dioxide. Because the shell contains a large amount of calcium carbonate and a small amount of impurity, the produced carbon dioxide has high purity; in addition, the shell belongs to waste, so that the use of the shell belongs to waste recycling; the produced product has low price, greatly reduces environment pollution caused by wasted shells and has important environment protection meaning.

Description

Technical field: [0001] The invention belongs to the field of inorganic chemical industry and relates to a preparation method of carbon dioxide. Background technique: [0002] Carbon dioxide has high civil and industrial value and is widely used in many fields, so it is a very precious resource. Not only widely used in petroleum exploration, metallurgy, welding, low-temperature cold coal, machinery manufacturing, artificial rainfall, fire protection, chemical industry, papermaking, agriculture, food industry, medical and health care, etc., but also in supercritical solvents, bioengineering, laser technology , nuclear industry and other cutting-edge high-tech fields. New applications developed in recent years, such as vegetable fertilizer, vegetable (meat) preservation, and the production of degradable plastics, also show good development prospects. [0003] The method for preparing high-purity carbon dioxide, publication number CN1152547A, published on June 25, 1997, prepa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/20C01B32/50
Inventor 马伟辛丘岩王刃程子洪秦承欢杨港赵南南田丽妍肖莉莉林燕兰姜晨于浩
Owner ZHANGZIDAO GRP
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