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Propellant and preparation method and applications thereof

A technology of propellant and butane, which is applied in the direction of botany equipment and methods, applications, biocides, etc., can solve the problems of inflammability and explosion, and achieve the effect of high safety

Inactive Publication Date: 2017-11-07
浙江台州绿源气体有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, most of the propellants using dimethyl ether as the propelling force of the aerosol in the prior art are flammable and explosive, and ethanol is also a common flammable liquid. It is necessary to strictly prohibit ignition sources during use, and its use has limitations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Pump tetrafluoroethane and butane into the mixing tank according to 60% and 40% by weight respectively;

[0033] (2) Desulfurization and drying cycle, the drying temperature is 20 ℃ ~ 60 ℃, and the mixture is adsorbed by molecular sieve;

[0034] (3) Take a sample from the mixing tank, use a moisture analyzer to test the water content of the sample and use a chromatograph to test the proportion of the mixed components;

[0035] (4) The qualified products after inspection are filled into steel cylinders in small packages and sealed.

Embodiment 2

[0037] (1) Pump tetrafluoroethane, butane and dimethyl ether into the mixing tank according to the weight percentage of 60%, 20% and 20% respectively;

[0038] (2) Desulfurization and drying cycle, the drying temperature is 20 ℃ ~ 60 ℃, and the mixture is adsorbed by molecular sieve;

[0039] (3) Take a sample from the mixing tank, use a moisture analyzer to test the water content of the sample and use a chromatograph to test the proportion of the mixed components;

[0040] (4) The qualified products after inspection are filled into steel cylinders in small packages and sealed.

Embodiment 3

[0042] (1) Pump tetrafluoroethane, butane and propane butane into the mixing tank according to the weight percentage of 60%, 20% and 20% respectively;

[0043] (2) Desulfurization and drying cycle, the drying temperature is 20 ℃ ~ 60 ℃, and the mixture is adsorbed by molecular sieve;

[0044] (3) Take a sample from the mixing tank, use a moisture analyzer to test the water content of the sample and use a chromatograph to test the proportion of the mixed components;

[0045] (4) The qualified products after inspection are filled into steel cylinders in small packages and sealed.

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Abstract

The invention discloses a propellant, which is characterized by comprising the following components in percentage by weight: 60% of tetrafluoroethane, 20 to 40% of butane, and the balance being a pressure adjusting agent. The invention also provides a preparation method of the propellant. The preparation method comprises the following steps: (1) pumping tetrafluoroethane, butane, and a pressure adjusting agent into a blending tank; (2) carrying out desulfurization, dry circulation, and molecular sieve adsorption; (3) performing sampling to obtain a sample, examining the water content of the sample by a moisture meter, and inspecting the mixed components of the sample by a chromatographic instrument; and (4) encapsulating qualified products. The invention further discloses an application of the propellant in the preparation of aerosol. The provided propellant can be used to replace propellants prepared from Freon and propane-butane. The produced aerosol is environmentally friendly, is resistant to explosion and combustion, has been tested in the test center of Shanghai Research Institute of Chemical Industry, and is suitable for the aerosol enterprises which do not have the hazardous article production qualification.

Description

technical field [0001] The invention relates to the field of aerosols, in particular to a propellant and its preparation method and application. Background technique [0002] Aerosol means that the medicine, emulsion or suspension and a suitable propellant are packaged together in a pressure-resistant container with a special valve system. It is used for lung inhalation or directly sprayed to the mucous membrane of the cavity, skin and preparations for space disinfection. [0003] The propellant is the injection power source of the aerosol. At normal pressure, the boiling point is lower than room temperature, and the vapor pressure is high. When the valve is opened, the pressure suddenly drops, and the propellant is rapidly vaporized. Spray as a mist. In 1943, Goodhue used dichlorodifluoromethane (Freon) as a propellant to prepare a portable insecticide aerosol, which was an important progress in the development of aerosol; in the 1950s, aerosol It is used for skin diseas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K47/06A61K47/08A61K9/12A61K8/04A01N25/06A01P7/00
CPCA01N25/06A61K8/046A61K9/124A61K47/06A61K47/08
Inventor 林志铭
Owner 浙江台州绿源气体有限公司
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