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A method for preparing nano-calcium carbonate based on subcritical hydrolysis

A nano-calcium carbonate and subcritical technology, applied in the direction of calcium carbonate/strontium/barium, nanotechnology, chemical instruments and methods, etc., can solve the problems of cumbersome nano-calcium carbonate process, lack of limestone resources, and many limestone impurities, and achieve Improve market competitiveness, high utilization rate of calcium ions, and low energy consumption

Active Publication Date: 2020-07-10
水恣意(厦门)科技有限公司
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  • Abstract
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Problems solved by technology

[0023] (1) At present, the development of shellfish in my country is mainly to process its edible parts, and a large number of shells are discarded as garbage. The organic matter left in these discarded shells will be corrupt and smelly during the long-term stacking process, which will endanger the lives of residents and the environment. cause serious pollution
[0024] (2) Limestone is used as raw material in the preparation of nano-calcium carbonate by traditional carbonization method, but limestone has many impurities and is not easy to separate, and limestone resources are lacking in some areas
[0025] (3) The traditional carbonization process for preparing nano-calcium carbonate is relatively cumbersome; and the calcination step needs to be powered by other forms of energy, such as burning charcoal or power consumption to maintain the high temperature conditions required for calcination; the traditional carbonization method prepares nano-calcium carbonate. To remove impurity ions, the use of impurity removal reagents will cause a certain loss of the original calcium ions, and due to the presence of water in the system, part of the calcium carbonate will harden, and the removal will also cause loss of calcium ions
The utilization rate of shellfish in Fujian Province's shellfish resources has been at a low level, which not only causes waste of resources but also pollutes the environment

Method used

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  • A method for preparing nano-calcium carbonate based on subcritical hydrolysis
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  • A method for preparing nano-calcium carbonate based on subcritical hydrolysis

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specific Embodiment

[0067] Specific embodiments of the present invention: Feasibility analysis of nanoscale shell sterilization powder for production;

[0068] The shell powder obtained by subcritical hydrolysis is used as a pollution-free green material;

[0069] 1. Market prospect of shell sterilization powder

[0070] Affected by traditional thinking, in people's minds, as long as it is a detergent, there are unsafe factors. For cleaning fruits and vegetables, many people would rather use clean water than fruit and vegetable cleaners. The main reason for this phenomenon is that consumers do not have enough trust in fruit and vegetable cleaners, so consumers have reservations about fruit and vegetable cleaners, thus Fruit and vegetable cleaners are developing slowly in the Chinese market. Moreover, there are not many detergent products for professional cleaning of vegetables and fruits, which shows that there is a huge demand space for them in China. At the same time, the problem of fruit pr...

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Abstract

The invention belongs to the technical field of preparation of nanometer calcium carbonate, and discloses a method for preparing nanometer calcium carbonate based on a subcritical hydrolysis method. The method for preparing nanometer calcium carbonate based on subcritical hydrolysis method comprises the steps that firstly, a shell grinding method is adopted to obtain millimeter calcium carbonate,the supercritical hydrolysis method is adopted for performing hydrolysis to extract amino acids in shells under the high pressure environment, and the step of drying is performed to obtain the nanometer calcium carbonate. The shells are comprehensively utilized, waste materials are recycled, and the problem that environment is contaminated by shells in coastal regions is solved; the shells are mainly prepared from calcium carbonate and protein, contain few impurities and are easily separated (shells are abundant in coastal area of the city of Xiamen in China), the shells as ocean resources inChina can be comprehensively utilized, and promotion is achieved; the shells are convenient to collect at the coastal regions and are cheap and easy to obtain, the raw material cost for preparing thenanometer calcium carbonate can be lowered, and the market competitiveness of the nanometer calcium carbonate product is improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of nano-calcium carbonate, in particular to a method for preparing nano-calcium carbonate based on a subcritical hydrolysis method Background technique [0002] At present, the commonly used prior art in the industry is as follows: my country is the largest shellfish breeding country in the world, and its annual output accounts for more than 60% of the world's total shellfish output. Data show that the annual output of shells in my country reaches 500,000 tons, yet, shells accounting for 1 / 3 of the weight of shellfish are discarded, and only 150,000 to 180,000 tons of discarded shells can be produced in one year. The coast of Fujian is a subtropical ocean and a shallow continental shelf, with many harbors and vast shallow beaches. Shellfish farming has a long history, rapid development, high output and rich varieties. The material composition of shells is divided into two parts: inorganic mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F11/18B82Y40/00A23B7/157
CPCA23B7/157B82Y40/00C01F11/185Y02A40/90Y02P20/54
Inventor 余康宸
Owner 水恣意(厦门)科技有限公司
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