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Chemical Industry Standard of the People's Republic of China
HG 2272 - 92
Hanyoufafafangyijingzhengyou
Sheng#793013
A201 Ammonia Synthesis Catalyst
1992-03-03 Issued
Ministry of Chemical Industry of the People's Republic of China
199301--01 Implementation
Chemical Industry Standard of the People's Republic of China
A201 Ammonia Synthesis Catalyst
Subject Content and Scope of Application
HG 2272-92
This standard specifies the technical requirements, test methods, inspection rules and packaging, marking, transportation and storage requirements of A201 ammonia synthesis catalyst.
This standard applies to A201 nitrogen synthesis catalyst for the reaction of hydrogen and nitrogen to produce ammonia in synthesis equipment. 2. Reference standards
Packaging, storage and transportation pictorial marking
GB6678 General rules for sampling of chemical products
ZBG74002 Test method for ammonia synthesis catalyst HG1-1430 Chemical composition analysis method for hydrogen synthesis catalyst 3 Technical requirements
3.1 Main physical properties and chemical components of the product The main physical properties and chemical components of the product are listed in Table 1 and Table 2 respectively. Except for the content of cobalt oxide, all chemical components are subject to regular inspection.
Particle size, mm
Bulk density, kg/L
Table 1 Main physical properties
Magnetic ring particles with black metallic luster 2. 2~3. 3; 3, 3~4.7: 4.7~6. 7; 6. 7~9. 42.7~3.0
Note: 1) According to the user's requirements, products of other particle sizes that meet the quality requirements can be produced. Table 2 Main chemical components
Total iron (Fe)
Cobalt oxide (Cojo)
Aluminum oxide (Al,O)
Sodium dioxide (SO)
65 ~ 70
% (m / m)
2. 1 ~2. 6
3.2 Technical indicators
Under the test methods and inspection conditions specified in this standard, the product quality of A201 ammonia synthesis catalyst must meet the technical indicators in Table 3.
Approved by the Ministry of Chemical Industry of the People's Republic of China on March 3, 1992 and implemented on January 1, 1993
HG2272-91
Table 3 Technical Indicators
Activity after heat resistance (volume percentage concentration of outlet hydrogen), % (V/) Cobalt oxide (Coo), % (m/m)
4 Test methods
4.1 Activity test method
Test method for A201 type synthetic catalyst, carried out in accordance with ZBG74002, including: refers to the original and heat resistance conditions of the heating temperature Parts: According to A110 series nitrogen synthesis catalyst in ZBG74002; Activity determination temperature: 415C; Space velocity: 295×102~305×102h-
4.2 Test method for chemical composition
The determination of cobalt oxide content in the chemical composition of A201 type hydrogen synthesis catalyst shall be carried out according to Appendix A of this standard; the analysis of other chemical components shall be carried out according to HG1-1430. 5 Inspection rules
5.1 The inspection of product quality shall be undertaken by the quality supervision and inspection department of the catalyst manufacturer. Products shall not be shipped without inspection. Products shipped shall have inspection certificates. Products shall be inspected in batches, and the representative quantity of each batch shall not exceed 30t. 5.2 The quality supervision and inspection department of the manufacturer shall send people to randomly sample for product inspection, and samples shall be taken according to three times the cube root of the total number of units in the product packaging barrel (i.e. 3·VN, N is the total number of units), and the number of sampling units shall not be less than 10 barrels. In the opened sampling barrel, take a total of about 3L of sample evenly, mix thoroughly, and use the reduction method to take experimental samples, test samples and storage samples, put them into sample bottles, seal them, and label them with product name, model, batch number, representative quantity, sampling date and sampler, etc. The storage sample shall be kept for one year for inspection.
5.3 If the product fails to meet the inspection requirements, the inspection equipment, instruments, chemical reagents, etc. shall be checked and calibrated before re-inspection. If the inspection still fails, re-sampling and inspection shall be allowed according to Article 5.2 of this standard. If the inspection still fails, the batch of products shall be judged as unqualified.||tt| |5.4 When there is a dispute between the supplier and the buyer about the quality of the product, the buyer has the right to conduct a re-test according to the test method specified in this standard and, if necessary, ask the relevant units for arbitration.
6 Packaging, marking, transportation and storage
6.1 The product should be packed in an airtight iron drum; the packaging should be accompanied by a product certificate, which includes: product name, mold, batch number, particle size, production date, product quality in accordance with HG2272--92, etc., and stamped with an inspection stamp. 6.2 The packaging should be black and have a clear and firm mark. The mark includes: product name, model, batch number, particle size, net weight, production date, etc. The manufacturer's name and date of production shall be marked with the graphic symbol of Figure 6 and the name of the figure in GB191. 6.3 The packaged products shall be stored in a dry warehouse and moisture and pollution shall be strictly prohibited. 6.4 It is strictly prohibited to drop, roll or hit during transportation and loading and unloading. Anti-roll facilities shall be provided during transportation. IG2272-91
Appendix A
Determination of cobalt oxide content Nitrosyl red drum colorimetric method (supplement)
A1 Method Summary
The sample is dissolved in acid. In an acetic acid medium with a pH of 5.5 to 6.0, cobalt, iron and nitrosyl red salt form a soluble colored complex. However, when sulfuric acid is added, iron and other dry substances are dissolved. The disturbing element will decompose when it forms a colored complex with nitroso red salt. Therefore, the colorimetric determination of cobalt is carried out.
A2 Instruments and reagents
A2.1 Spectrophotometer: with a wavelength of 530nm; A2.2 Hydrochloric acid (GB622);
A2.3 Sulfuric acid (GB625) solution: 1+2;
A2.4 Nitric acid (GB626) solution: 1+1; www.bzxz.net
Sodium sulfate (GB693) solution: 500g/L
Phosphoric acid (GB1282:
Nitroso red salt (HG3--973): 5g/L; A2. T
Sulfur-phosphorus mixed acid: Take 150mL of sulfuric acid and inject it into a beaker containing 700mL of water. After cooling, add 150mL of phosphoric acid (A2.7). A2.8
mL, A2.9 Cobalt standard solution (1mL contains 1.00g of cobalt): Weigh 2.630g of anhydrous cobalt sulfate (burned with CoS0,·7H,0 at 500-550℃ to constant weight), dissolve it in water, transfer it to a 1000mL volumetric flask, dilute it to the scale with water, and shake it well. Or weigh 1.0000g of metallic cobalt (content is more than 99.9%), add 30mL of nitric acid (1+1), heat to dissolve and boil to drive off nitrogen oxides. After cooling, transfer it to a 1000mL volumetric flask, dilute it to the scale with water, shake it, and absorb the above 1mL containing 20.0mL of 1.00mg cobalt standard solution is placed in a 100mL volumetric flask, diluted to the mark with water, and spread evenly. This solution contains 0.20mg cobalt in 1mL.
Preparation of A3 sample solution
Weigh 0.1g (accurate to 0.0001g) of the sample that has been ground and passed through a 0.18~0.15mm standard sieve (in accordance with the R40/3 series in GB6003 "Test Sieve"), place it in a 150mL conical flask, add 10㎡L of hydrochloric acid, heat to dissolve, evaporate to nearly dryness, then add 10mL of sulfuric acid and phosphoric acid mixture, continue heating and add nitric acid (1+1) dropwise to oxidize until white smoke appears, then remove the conical flask, cool it slightly, add a little water to dissolve the salts, transfer it to a 100mL volumetric flask, add water to dilute to the mark, place evenly, and filter it dry. A4 Working curve drawing
Weigh 0.1 g of A110 series nitrogen synthesis catalyst without cobalt that has been ground and passed through a 0.18-0.15 mm standard test sieve, dissolve, dilute and dry filter according to the sample solution preparation method (A3), transfer 5 portions of the solution and place them in 150 mL conical flasks respectively, add 1 mL of standard solution containing 0.200 mg cobalt in sequence: 0.00, 0.50, 1.00, 1.50, 2.00 mL, and measure the absorbance according to the analytical steps (A5) with the reagent blank as the reference, and draw the working curve. A5 Analysis steps
Take 10mL of sample preparation solution (A3) and place it in a 150mL conical flask, add 20mL of nitroso red salt, add 10mL of sodium acetate solution and shake well, heat to boiling for about 1~2m, then add 10mL of sulfuric acid (1+2), cool to room temperature with running water, transfer to a 100mL volumetric flask, dilute to scale with water, shake well. Use 0.5cm colorimetric blood to measure the absorbance at a wavelength of 530nm. According to the absorbance, the amount of "cobalt" in the test solution can be found from the working curve.
A6 Description of the analysis results
HG 2272
Cobalt oxide (Ca,,) mass (percentage x), calculated according to formula (A1): 3xt.362 0
m, × 10
x: 100
where: mo—the mass of the sample weighed, gi—the amount of cobalt in the solution to be tested obtained from the working curve, mg; P
1. 362 0——cobalt conversion to Co;0, coefficient. A7 Allowable error
The difference between the results of two parallel determinations shall not exceed 0.10%, and the measured results shall be expressed to two decimal places,
Additional remarks:
This standard was proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China, and was drafted by the Research Institute of Nanjing Chemical Industry (Group) Corporation. The main drafters of this standard are Zhu Feng, Zhong Lihong, and Jia Zhuru. (A1)
People's Republic of China
Chemical Industry Standard
Compound Optimizer
A 201E
HG 2272 —92
Chemical Industry Standard Editorial Department
《Chemical Industry Standardization Research Institute》
Postal Code: 100013
Chemical Industry Standardization Research Institute
Copyright reserved. No reproduction
Copyright 880×1230 1/16 Number of words on a sheet 8 000 First edition in September 1992
First printing in September 1992
Number of copies 1 500
Cost 1.40 Yuan
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