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Grading method for assessing risk of chemical substance

A classification method, technology of chemical substances, applied in the direction of material explosiveness, etc.

Inactive Publication Date: 2019-07-16
国家安全生产监督管理总局化学品登记中心 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that in the prior art, the amount of substance used in the actual tuberculosis test and the volume of the container are not taken into consideration. It provides a new grading method for evaluating the risk of chemical substances, which has the ability to evaluate The advantage of being more accurate

Method used

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  • Grading method for assessing risk of chemical substance
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  • Grading method for assessing risk of chemical substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A hierarchical method for assessing the level of hazard of a chemical substance, such as figure 1 As shown, the autoclave is a cylindrical stainless steel container with a volume of 96 milliliters and a working pressure of 150 MPa at a temperature of 473K. The autoclave is made of AISI431 stainless steel with an inner diameter of 38 mm and an inner height of 84 mm. Inside the autoclave there is a sample container (made of AISI316 type stainless steel, with an inner diameter of 32 mm and an inner height of 77 mm). A coated nickel-chromium resistance wire (10 ohm / meter resistivity) is jump-wound on a glass tube and the sample is heated by a constant current supply; the heat supplied is 50-150 watts. Due to the use of the inner vessel, the heat transfer from the substance to the autoclave is very small compared to the heat transfer without the inner vessel. It can thus be heated rapidly, leading to an exothermic reaction including self-heating and detonation, determining...

Embodiment 2

[0041] A hierarchical method for assessing the level of hazard of a chemical substance, such as figure 1 As shown, the autoclave is a cylindrical stainless steel container with a volume of 96 milliliters and a working pressure of 150 MPa at a temperature of 473K. The autoclave is made of AISI431 stainless steel with an inner diameter of 38 mm and an inner height of 84 mm. Inside the autoclave there is a sample container (made of AISI316 type stainless steel, with an inner diameter of 32 mm and an inner height of 77 mm). A coated nickel-chromium resistance wire (10 ohm / meter resistivity) is jump-wound on a glass tube and the sample is heated by a constant current supply; the heat supplied is 50-150 watts. Due to the use of the inner vessel, the heat transfer from the substance to the autoclave is very small compared to the heat transfer without the inner vessel. It can thus be heated rapidly, leading to an exothermic reaction including self-heating and detonation, determining...

Embodiment 3

[0059] A hierarchical method for assessing the level of hazard of a chemical substance, such as figure 1As shown, the autoclave is a cylindrical stainless steel container with a volume of 96 milliliters and a working pressure of 150 MPa at a temperature of 473K. The autoclave is made of AISI431 stainless steel with an inner diameter of 38 mm and an inner height of 84 mm. Inside the autoclave there is a sample container (made of AISI316 type stainless steel, with an inner diameter of 32 mm and an inner height of 77 mm). A coated nickel-chromium resistance wire (10 ohm / meter resistivity) is jump-wound on a glass tube and the sample is heated by a constant current supply; the heat supplied is 50-150 watts. Due to the use of the inner vessel, the heat transfer from the substance to the autoclave is very small compared to the heat transfer without the inner vessel. It can thus be heated rapidly, leading to an exothermic reaction including self-heating and detonation, determining ...

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Abstract

The invention relates to a grading method for assessing the risk of a chemical substance, which mainly solves the problem that the use amount of a substance and the volume of a container in an actualtuberculosis test are not taken into account in the prior art. The grading method for assessing the risk of a chemical substance comprises the following steps: (1) the substance of the required quality is weighed and put in a sample container, and the sample container is then put in a high pressure kettle; (2) a heating coil is connected to the high pressure kettle cover, and the high pressure kettle cover is then closed; (3) the whole heating coil is ensured to be buried in the substance; (4) the end point of a heating resistance wire is connected to a power supply electrode by using a low resistance wire; and (5) a sample is heated until explosion happens. The technical scheme can well solve the above problems and can be used for assessing the risk of a chemical substance.

Description

technical field [0001] The invention relates to a grading method for evaluating the risk level of chemical substances. Background technique [0002] Most of the production and transportation of chemical products involve the use of relatively closed spaces, such as reaction kettles and distillation tanks in the production process, and airtight containers in the transportation process, and many chemical substances accumulate heat and pressure in the airtight space, resulting in the collapse of the container. The explosion caused certain casualties and economic losses. [0003] By searching relevant patents and national standards, we found GB / T 21620-2008 "Test Method for Oxidation of Dangerous Goods Liquids" and related patents. Although the method and related patents have passed the test of the pressure of the ignition coil after the substance to be tested is mixed with cellulose The rise time is used to determine whether it is an oxidizing substance, but it does not take in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/54
CPCG01N25/54
Inventor 霍明甲吴保意张会光王双全
Owner 国家安全生产监督管理总局化学品登记中心