GB/T 12574-2023_English: PDF (GB/T12574-2023)
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| GB/T 12574-2023 | English | 269 |
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Determination of acid number in aviation turbine fuel
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GB/T 12574-2023
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| GB/T 12574-1990 | English | 169 |
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Jet fuels. Determination of total acid number
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GB/T 12574-1990
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| Standard ID | GB/T 12574-2023 (GB/T12574-2023) | | Description (Translated English) | Determination of acid number in aviation turbine fuel | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | E31 | | Classification of International Standard | 75.160.20 | | Word Count Estimation | 14,198 | | Date of Issue | 2023-09-07 | | Date of Implementation | 2024-01-01 | | Older Standard (superseded by this standard) | GB/T 12574-1990 | | Drafting Organization | Sinopec Petrochemical Research Institute Co., Ltd., China Aviation Oil Co., Ltd., Second Research Institute of the Civil Aviation Administration of China, Sinopec Beijing Yanshan Branch, Sinopec Hainan Refining and Chemical Co., Ltd., PetroChina Co., Ltd. Petrochemical Research Institute, South China Blue Sky Aviation Oil Co., Ltd., Shaanxi Yanchang Petroleum (Group) Co., Ltd. Yongping Refinery, Beijing Chuxiangfei Technology Development Co., Ltd., Sichuan Provincial Product Quality Supervision, Inspection and Inspection Institute (Sichuan Provincial Quality and Technical Review Evaluation Center) | | Administrative Organization | National Petroleum Products and Lubricants Standardization Technical Committee (SAC/TC 280) | | Proposing organization | National Petroleum Products and Lubricants Standardization Technical Committee (SAC/TC 280) | | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | | Standard ID | GB/T 12574-1990 (GB/T12574-1990) | | Description (Translated English) | Jet fuels. Determination of total acid number | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | E31 | | Classification of International Standard | 75.160.30 | | Word Count Estimation | 3,311 | | Date of Issue | 1990/12/14 | | Date of Implementation | 1991/10/1 | | Adopted Standard | IP 354-1981 (1987), NEQ | | Drafting Organization | Research Institute of Petroleum | | Administrative Organization | Research Institute of Petroleum | | Summary | This standard specifies the determination of the total acid number of jet fuel with a color indicator method. This standard applies to the total acid number in the range of 0. 000 ~ 0. 100mgKOH/g of jet fuel. |
GB/T 12574-2023. Determination of total acid value of jet fuel
ICS 75.160.20
CCSE31
National Standards of People's Republic of China
Replace GB/T 12574-1990
Jet fuel total acid number determination method
Published on 2023-09-07
2024-01-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Preface
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 12574-1990 "Method for determination of total acid value of jet fuel". Compared with GB/T 12574-1990, except for structural adjustment
In addition to general and editorial changes, the main technical changes are as follows.
a) Added the term "acid value" and its definition (see 3.1);
b) Added requirements for the weighing mass of potassium hydrogen phthalate (reference reagent) when calibrating potassium hydroxide isopropyl alcohol standard solution (see
5.9);
c) Added absolute ethanol and nitrogen as reagent materials (see 5.8 and 5.12);
d) Added the preparation requirements for titration solvent and p-naphtholbenzene (see 5.10 and 5.11);
e) Added content related to automatic instruments (see 6.1, 7.3, 10.2.2, 10.3.2 and Chapter 11);
f) Added quality control checks (see Chapter 8);
g) Increased precision of automatic instrument methods (see 10.2.2 and 10.3.2);
h) Added Appendix A (Normative) "Jet Fuel Total Acid Number Determinator".
Please note that some content in this document may be subject to patents. The publisher of this document assumes no responsibility for identifying patents.
This document is proposed and coordinated by the National Petroleum Products and Lubricants Standardization Technical Committee (SAC/TC280).
This document was drafted by. Sinopec Petrochemical Research Institute Co., Ltd., China Aviation Fuel Co., Ltd., China Civil Aviation
The Second Research Institute of the General Administration of Aeronautics and Astronautics, Sinopec Beijing Yanshan Branch, Sinopec Hainan Refining and Chemical Co., Ltd., China
National Petroleum and Natural Gas Co., Ltd. Petrochemical Research Institute, South China Blue Sky Aviation Oil Co., Ltd., Shaanxi Yanchang Petroleum (Group) Co., Ltd.
Ren Company Yongping Refinery, Beijing Chuxiangfei Technology Development Co., Ltd., Sichuan Provincial Product Quality Supervision, Inspection and Inspection Institute (Sichuan Provincial Quality
Technical Review and Evaluation Center).
The main drafters of this document. Chang Chunyan, Zhang Chenmeng, Li Ming, Deng Jun, Hao Meng, Tao Zhiping, Zhao Guoguo, Li Yuntong, Huang Yicheng, Ma Chunyang,
Zhao Jinquan, Lai Quanchang, Zhang Kaijing.
This document was first published in.1990 and this is the first revision.
introduction
There may be some acidic substances in jet fuel, which come from acid treatment during the refining process, natural organic acids in the raw materials, or jet fuel.
Additives used in materials (such as T1602 naphthenic acid anti-wear additive). The presence of acidic substances will corrode materials in contact with them
properties, affecting the water separation characteristics of jet fuel.
The total acid number of jet fuel is an important quality indicator of jet fuel. This data is useful for monitoring the process status of jet fuel production equipment, injection
The development of new processes for gas fuel production, the use of jet fuel anti-wear additives and the quality control of jet fuel are all very important.
Jet fuel total acid number determination method
Warning---Personnel using this document should have practical experience in regular laboratory work. The use of this document may involve certain hazardous
materials, equipment and operations, this document does not identify all possible safety issues. Users are responsible for taking appropriate safety and health measures
implementation, and ensure compliance with the conditions stipulated in relevant national laws and regulations.
1 Scope
This document describes a method for determining the total acid number of jet fuels using the color indicator method.
This document applies to jet fuel with a total acid value ranging from 0.000mg/g (based on KOH) to 0.100mg/g (based on KOH).
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document.
GB/T 4756 Manual sampling method for petroleum liquids
GB/T 4945-2002 Determination of acid value and base number of petroleum products and lubricants (color indicator method)
GB/T 6682 Specifications and test methods for water used in analytical laboratories
GB/T 27867 Automatic sampling method for petroleum liquid pipelines
SH/T 0635 Liquid petroleum product sampling method (semi-automatic method)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1
acid valueacidnumber
The amount of base required to titrate a sample in a specified solvent to a specified end point in a specific system.
Note. The unit is expressed in mg/g (calculated as KOH).
4 Principles
Dissolve the sample in a mixture of toluene and isopropyl alcohol containing a small amount of water, pass nitrogen into the resulting homogeneous solution to cover it, and cover it with hydrogen.
The standard titration solution of potassium oxide in isopropyl alcohol is used for titration, and the color change of the p-naphtholbenzene indicator (it appears orange in acidic solution, and appears orange in alkaline solution).
Green color appears in the liquid) to determine the end point.
5 Reagents and materials
Warning---Toluene is flammable and the vapor is toxic. Keep away from open flames and pay attention to ventilation.
Warning--Potassium hydroxide is corrosive. Keep away from sources of fire. Wear appropriate protective clothing, gloves and goggles.
Warning---Isopropyl alcohol is flammable and the vapor is toxic. Keep away from open flames and pay attention to ventilation.
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