HG/T 2774-1996 Industrial modified ultrafine precipitated barium sulfate
Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T2774—1996
Industrial Modified Ultrafine Precipitated Barium Sulfate
Published on January 24, 1996
Ministry of Chemical Industry of the People's Republic of China
Implemented on January 1, 1997
WHG/T2774—1996
The first-class and precipitated barium sulfate in this standard are equivalent to the international standard IS03262:1975 "Fillers for Paints", and the main technical differences are as follows:
1 The scope of application of this standard is industrial use. In order to meet the needs of various industries, this standard divides the products into two types: powder and precipitated, and the powder is divided into two grades. The ISO3262 standard is for paints and has only one grade. 2 The index items of the industrial modified ultrafine precipitated barium sulfate chemical industry standard have two more indicators than ISO3262, namely iron content and oil absorption, and the median particle size index replaces the particle size distribution.
3The indicators of Class I first-class products and Class I paste barium are equal to or better than ISO3262 standard, and qualified products are close to this standard. 4Except for whiteness, the items identical to ISO3262 are equivalent or equivalent to the methods in ISO3262 standard. Whiteness is measured by whiteness measuring instrument. Median particle size is measured by particle size distribution instrument. Iron content is determined by GB/T3049-86 "General method for determination of iron content in chemical products-o-phenanthroline spectrophotometry", which is not equivalent to ISO6685:1982. This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Tianjin Chemical Research Institute of the Ministry of Chemical Industry. The responsible drafting units of this standard: Tianjin Chemical Research Institute of the Ministry of Chemical Industry, Shandong Linmu Chemical General Plant. The main drafters of this standard: Zhang Jingjuan, Wang Junqiang, Si Yuchun, and Zhang Xiao. I
W.1 Scope
Chemical Industry Standard of the People's Republic of China
Industrial Modified Ultrafine Precipitated Sulfuric Acid
HG/T2774—1996
This standard specifies the requirements, sampling, test methods, marking, packaging, transportation and storage of industrial modified ultrafine precipitated sulfuric acid. This standard applies to industrial modified ultrafine precipitated barium sulfate. This product is mainly used in paint, ink, battery and copperplate paper industries. Molecular formula: BaSo4
Relative molecular mass: 233.40 (according to the 1991 international relative atomic mass) 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB191-90 Pictorial symbols for packaging, storage and transportation
GB/T601-88 Chemical reagents
Preparation of standard solutions for titration analysis (volume analysis) GB/T602-88 Preparation of standard solutions for determination of impurities in chemical reagents (neqISO6353/1:1982) GB/T603-88 Preparation of preparations and products used in test methods for chemical reagents (neqISO6353/1:1982) GB/T1250-89 Methods for expressing and determining limit values GB/T2 899—1996
Industrial precipitated sulfuric acid
GB/T6678—86General rules for sampling of chemical productsGB/T6682—92
GB/T8946—88
GB/T8947—88bzxz.net
3 Classification
Specifications and test methods for water used in analytical laboratories (eqvISO3696:1987)Plastic woven bags
Composite plastic woven bags
Mainly used in industries such as pigments, inks, rubber, batteries, and plastics. Class I: Powder
Class I: Powder is suitable for industries such as copperplate paper. 4 Requirements
4.1 Appearance: Amorphous white powder or white paste. 4.2 Industrial modified ultrafine precipitated sulfate lock should meet the requirements of Table 1: Approved by the Ministry of Chemical Industry of the People's Republic of China on January 24, 1996 and implemented on January 1, 1997
Barium sulfate (BaSot) content (dry basis), %Volatile matter at 105℃, %
Water-soluble matter content, %
Iron (Fe) content, %
Whiteness, %
Oil absorption, g/100g
pH value (100g/L suspension)
Fineness (45μm pore size sieve residue), %
Median particle size, um
5 Sampling
5.1 Each batch of product shall not exceed 100t.
HG/T2774—1996
Requirements in Table 1
First-class products
Qualified products
Paste barium
5.2 Determine the number of sampling units in accordance with the provisions of GB/T66786.6. When sampling, insert the sampler obliquely from the top of the packaging bag to three-quarters of the depth of the material layer to take samples. Mix the sample thoroughly, reduce it to about 1000g by quartering, and put it into two clean and dry ground-mouth bottles. Paste labels on the bottles, indicating: manufacturer name, product name, category, grade, batch number, sampling date and name of the sampler. One bottle is used as a laboratory sample, and the other bottle is kept for three months for reference. 5.3 If one of the test results does not meet the requirements of this standard, sampling should be verified from twice the amount of packaging. If the verification result shows that only one of the indicators does not meet the requirements of this standard, the entire batch of products will be unqualified. 6 Test methods
6.1 All nine index items specified in this standard are type inspection items, among which the content of chlorinated sulfate, volatile matter at 105℃, water-soluble matter content, pH value, whiteness, oil absorption and fineness are routine test items and should be tested batch by batch. Under normal production conditions, type test is carried out once a month.
6.2 The rounded value comparison method specified in GB/T12505.2 is used to determine whether the test results meet the standards. 6.3 The reagents and water used in this standard, unless otherwise specified, refer to analytical pure reagents and grade 3 water specified in GB/T6682. The standard solutions, impurity standard solutions, preparations and products required in the test, unless otherwise specified, are prepared in accordance with the provisions of GB/T601, GB/T602 and GB/T603.
6.4 Determination of chlorinated sulfate content
Same as 6.4 in GB/T2899.
6.5 Determination of volatile matter at 105℃
Same as 6.5 in GB/T2899.
W.bzsoso.coI6.6 Determination of water-soluble matter content
Same as 6.6 in GB/T2899.
6.7 Determination of iron content
Same as 6.7 in GB/T2899.
6.8 Determination of whiteness
Same as 6.8 in GB/T2899.
6.9 Determination of oil absorption
Same as 6.9 in GB/T2899.
6.10 Determination of pH value
Same as 6.10 in GB/T2899.
6.11 Determination of fineness
Same as 6.11 in GB/T2899.
6.12 Determination of median particle size
6.12.1 Method summary
HG/T2774—1996
Median particle size refers to the diameter of 50% of the particles in the product. The median particle size is determined by a particle size distribution instrument. 6.12.2 Instruments and equipment
Particle size distribution instrument.
6.12.3 Analysis steps
Perform the measurement in accordance with the instrument manual. 6.12.4 Expression of analysis results
The median particle size value given by the instrument indicates the median particle size value of the sample. 6.12.5 Allowable difference
Take the arithmetic mean of the parallel measurement results as the measurement result. The absolute difference of the parallel measurement results shall not exceed 0.05μm. 7 Marking, packaging, transportation and purchase and storage
7.1 The packaging of industrial modified ultrafine precipitated sulfuric acid should be firmly and clearly marked, including: manufacturer name, factory address, product name, trademark, category, grade, net weight, batch number or production date, this standard number and the "moisture-afraid" mark specified in GB191. 7.2 Industrial modified ultrafine precipitated sulfuric acid should be tested by the quality supervision and inspection department of the manufacturer in accordance with the provisions of this standard. The manufacturer should ensure that each batch of products leaving the factory meets the requirements of this standard. Each batch of products leaving the factory should be accompanied by a quality certificate, including: manufacturer name, factory address, product name, trademark, category, net weight, batch number or production date, proof that the product quality complies with this standard and this standard number. 7.3 Industrial modified ultrafine precipitated sulfuric acid is double-packed, and the inner packaging is a polyethylene plastic film bag with a thickness of not less than 0.07mm, the inner bag packaging volume should be larger than the outer bag; the outer packaging uses plastic woven bags or composite plastic woven bags, and its performance and inspection methods should comply with the provisions of GB/T8946 and GB/T8947. The net weight of each bag is 25kg or 50kg. 7.4 The inner bag of the package is tied with vinyl rope or other ropes of equivalent quality, or sealed with other equivalent methods. The outer bag is folded at a distance of not less than 30mm from the edge of the bag, and the edge is sewn with vinyl thread or other threads of equivalent quality at a distance of not less than 15mm from the edge of the bag. The stitch length is not more than 7-12mm, the stitches are neat, and the stitch length is uniform. There is no leakage or skipping. 7.5 Industrial modified ultrafine precipitated barium sulfate should be protected from rain, moisture and exposure during transportation. 7.6 Industrial modified ultrafine precipitated sulfuric acid should be stored in a ventilated and dry warehouse. 3
W.bzsoso.coI
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