Device for preparing ultrafine particles using supercritical fluid

A technology of supercritical fluid and ultrafine particles, which is applied in the direction of granulation of raw materials, solution crystallization, chemical instruments and methods, etc., can solve problems such as unbearable for customers, single function, and difficult to reach the working state.

Inactive Publication Date: 2015-10-07
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the supercritical equipment that is widely used at present has a single function and can only realize one of the above-mentioned functions. There are very few supercritical equipment that have two functions, but the modification is very complicated, and long-term debugging is required after modification. Still struggling to work optimally
Therefore, in order to be able to realize the multi-functional supercritical preparation function, it is necessary to re-purchase the corresponding supercritical equipment. The supercritical equipment is generally expensive, and the cost required is very high, which is unbearable for customers.

Method used

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  • Device for preparing ultrafine particles using supercritical fluid
  • Device for preparing ultrafine particles using supercritical fluid
  • Device for preparing ultrafine particles using supercritical fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this example, in Figure 1 to Figure 11 , the symbols of all components in the figure are as follows:

[0054] symbol illustrate C Supercritical Fluid Cylinders H fluid cooler B carbon dioxide pump CS Entrainer container U Entrainer booster pump A1 The first reactor A2 The second reactor S Splitter RN heating nozzle R mixer CL collector E1, E2, E3... Exit 1, 2, 3... K1, K2, K3... Valve 1, 2, 3... ，P pressure gauge ，T thermometer

[0055] In this example, see Figure 1 to Figure 11 , the device for preparing ultrafine particles using supercritical fluid is composed of a supercritical fluid supply device, an entrainer supply device, a reactor and a separation device as the main functional modules, and is composed of system splicing through different assembly and connection methods, and is characterized in that, By setting a series of auxiliary valves ...

Embodiment 2

[0075] This embodiment is basically the same as Embodiment 1, especially in that:

[0076] In this embodiment, for the supercritical fluid extraction unit, the seventh auxiliary valve K7 and the eighth auxiliary valve K8 are opened, and when the entrainer needs to be used, the entrainer filled in the entrainer container CS is pressurized by the entrainer The pump U is pressurized to generate high-pressure entrainer fluid, and the high-pressure entrainer fluid flows into the first pipeline between the sixth auxiliary valve K6 and the first inlet valve K2 after the pipeline where the seventh auxiliary valve K7 and the eighth auxiliary valve K8 are located. The pipeline node N1 merges with the high-pressure entrainer fluid prepared by the entrainer supply device. After the high-pressure entrainer fluid and the supercritical fluid are mixed and mixed, the fluid is controlled to enter the first reactor A1 by controlling the first inlet valve K2. Under the temperature and pressure s...

Embodiment 3

[0078] This embodiment is basically the same as the previous embodiment, and the special features are:

[0079] In this embodiment, for the supercritical solution rapid expansion particle preparation unit, the seventh auxiliary valve K7 and the eighth auxiliary valve K8 are opened, and when the entrainer needs to be used, the entrainer filled in the entrainer container CS is passed through the entrainer The agent booster pump U is pressurized to generate high-pressure entrained agent fluid, and the high-pressure entrained agent fluid flows between the sixth auxiliary valve K6 and the first inlet valve K2 after the pipelines where the seventh auxiliary valve K7 and the eighth auxiliary valve K8 are located The first pipeline node N1 of N1 merges with the high-pressure entrainer fluid prepared by the entrainer supply device. After the high-pressure entrainer fluid and the supercritical fluid are mixed and mixed, they enter the first reactor A1, and in the first reactor A1 Under ...

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Abstract

The invention discloses a device for preparing ultrafine particles by using supercritical fluid. By selecting and controlling the opening and closing of a series of auxiliary valves in the equipment assembly, a series of device units for preparing ultrafine particles by using supercritical fluid are formed. The assembly can realize five functions including supercritical fluid extraction technology, supercritical anti-solvent particle preparation technology, supercritical solution rapid expansion particle preparation technology, supercritical fluid enhanced solution diffusion technology, supercritical fluid assisted microencapsulation technology, etc. It can meet the requirements of material extraction, preparation of organic micro / nano materials, and preparation of inorganic micro / nano materials. The equipment has the advantages of easy operation, wide adjustable range of equipment experimental parameters, strong stability, and high production efficiency. It has great application potential in the field of material preparation and is extremely suitable for experimental research in universities and research institutes, as well as small tests in factories. It is required for proofing and saves a lot of equipment purchase expenses for users.

Description

technical field [0001] The invention relates to a device for preparing ultrafine particles, and also relates to a supercritical device, which is applied in the technical field of supercritical auxiliary material preparation. Background technique [0002] The so-called supercritical state refers to a special state of matter. When a certain substance is above the critical temperature and critical pressure, the properties of the gas phase and the liquid phase of the substance will tend to be similar, and finally a homogenous phase (Homogenous) will be achieved. The state at this time is called supercritical state, and this special fluid is called It is a supercritical fluid (Supercritical Fluid, SF). Supercritical fluids are compressible like gases and have fluidity like liquids, and their densities are generally between 0.1 and 1.0 g·ml -1 between. Due to its liquid-like dissolving ability, supercritical fluid can be defined as a heavy gas with controllable dissolving abili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J2/00B01D9/02
Inventor 赵斌陈超金彩虹何丹农
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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