Some standard content:
Chemical Industry Standard of the People's Republic of China
Chloroparaffin
Subject content and scope of application
Wax-52
HG2092-91
This standard specifies the technical requirements, test methods, inspection rules and marking, packaging, transportation and storage requirements of industrial chlorinated paraffin-52.
This standard is applicable to industrial chlorinated paraffin with a chlorine content of 50%~54% obtained by nitriding and refining normal liquid paraffin with an average carbon atom number of about 15. This product is mainly used as an auxiliary plasticizer for polyvinyl chloride. 2 Reference standards
GB1657
GB1660
GB1664
GB1679
GB1680
GB6680
3 Technical requirements
Determination of refractive index of plasticizer
Determination of kinematic viscosity of plasticizerPinault method
Determination of appearance color of plasticizerPlatinum-cobalt colorimetric methodDetermination of mercury content of chlorinated paraffinMethod for determination of thermal stability index of chlorinated paraffin
Sampling of liquid chemical products General rules
3.1 Appearance: water white or yellow viscous liquid. 3.2 Chlorinated paraffin-52 shall meet the following requirements: Item
Color (platinum-cobalt), No.
Density (50℃), g/cm
Chlorine content, %
Viscosity (50℃), mPa·s
Refractive index, n product
Heating loss (130℃, 2h), %
Thermal stability index) (175℃, 4h, nitrogen 10L/h), HC1%, Note: 1) Inspect at least once every six months.
4 Test method
Superior quality
1.23~1.25
150250
1.5101.513
First quality
1.23~1.27
1.505~1.513
The reagents and water used in this standard are analytical pure reagents and distilled water unless otherwise specified. Approved by the Ministry of Chemical Industry of the People's Republic of China on December 24, 1991
Qualified products
1.22~1.27
Implemented on January 1, 1993
4.1 Determination of color
The determination shall be carried out in accordance with the provisions of GB1664.
HIG2092-91
When the color of the sample to be tested is darker than No. 500, the volume of the sample taken for colorimetry is half of the standard colorimetric solution, and the measured color number is multiplied by 2, which is the color number of the sample.
4.2 Determination of nitrogen content
The determination is carried out in accordance with the provisions of GB1679.
4.3 Determination of density
4.3.1 Pycnometer method (arbitration method)
4.3.1.1 Principle
At the same temperature, the volume of the pycnometer is calibrated with water, and then the mass of the sample of the same volume is measured to obtain its density. 4.3.1.2 Instruments
Analytical balance: sensitivity is 0.0001g
Thermometer: graduation value is 0.1C;
Constant temperature water bath: temperature is controlled at 50±0.1:d. Pycnometer: volume is 25mL,
4.3.1.3 Operation steps
Weigh a clean, dry pycnometer with a stopper, and then fill the bottle with water that has been boiled and cooled to below 50℃. After plugging, immediately immerse it in a constant temperature water bath at 50±0.1℃, keep the temperature constant for half an hour, remove the water overflowing from the capillary with filter paper, quickly take it out of the water bath, wipe off the water outside the pycnometer, cool it to room temperature and weigh it, pour out the water in the pycnometer, dry it and fill it with the sample, heat it in an oven to about 70℃, and after there are no bubbles in the sample, cool it to below 50℃, cover it with the pycnometer stopper, and operate according to the above method to obtain the mass of the sample. 4.3.1.4 Calculation
The density psc of chlorinated paraffin-52 at 50℃ is calculated according to formula (1): P.so
Wherein: m
mass of the pycnometer, g:
mass of the pycnometer and the sample, g;
msmass of the pycnometer and the water, g;
Po——density of water at 50℃, 0.98805g/cm24.3.1.5 Allowable difference
Each sample shall be measured twice under the same conditions, and the difference between the results shall not exceed 0.001g/cm2. The arithmetic mean shall be taken as the density of the sample.
4.3.2 Densitometer method
4.3.2.1 Instrument
a Densitometer: graduation value is 0.002g/cm
Constant temperature water bath: temperature is controlled at 50±0.2℃; b.
Glass-based Volume: 250mL;
Thermometer: 50℃, graduation value is 0.2℃, d.
4.3.2.2 Operation steps
Put the sample into a clean and dry volume cylinder, and then put the volume cylinder into a constant temperature water bath at 50±0.2℃. After the temperature is constant, slowly put the clean and dry density meter into the tested sample, with its lower end not less than 2cm away from the bottom of the volume cylinder and not in contact with the wall of the volume cylinder. The liquid on the part exposed outside the liquid surface shall not exceed 3 graduations. When there are no bubbles on the bottom and wall of the density meter and the temperature is constant, read the scale value of the lower edge of the meniscus of the density meter (except for the density meter marked with a scale for reading the upper edge of the meniscus). This scale value is the value of the tested sample. The density Psg of paraffin 52 at 50°C is calculated according to formula (2): Pso-pso+p'sα(20-t)
Wherein: pso is the density of the sample at 50°C, g/cm2; glass expansion coefficient, 0.000025;
20 is the standard temperature, °C;
measurement temperature,;
0.001 is the approximate correction value of the density meter reading at 50°C, g/cm2. 4.3.2.4 Allowable difference: Each sample is measured twice under the same conditions, and the difference between the results is not more than 0.002g/cm2. The arithmetic mean is taken as the density of the sample.
4.4 Determination of viscosity
Determination shall be carried out in accordance with the provisions of GB1660.
4.4.1 Calculation
The viscosity at 50℃, nso, shall be calculated according to formula (3): n50=50P50
Wherein: Vs0
The kinematic viscosity of the sample at 50℃, 10-m2/s-The density of the sample at 50℃, 10kg/m
4.4.2 Allowable difference
The difference between the results of two parallel determinations shall not exceed 1% of the arithmetic mean. The arithmetic mean is taken as the viscosity of the sample. 4.5 Determination of refractive index
Determination shall be carried out in accordance with the provisions of GB1657.
4.6 Determination of heating loss
4.6.1 Instrument
Electric heating constant temperature box: Inner layer dimensions: length, width and height are 400 respectively ～500mm; a.
Weighing bottle: 40mm in diameter, 25mm in height;
c.Dryer: filled with color-changing silica gel:
d.Circular asbestos board: 200mm in diameter, 2~3mm in thickness.4.6.2 Operation steps
Use two weighing bottles with lids (b) that have been weighed to a constant weight to weigh 6.4~6.6g (accurate to 0.0002g) of the sample respectively, and place them at appropriate positions on the asbestos board in the electric constant temperature drying oven (a) adjusted to 130±2℃. The distance between the asbestos board and the top of the inner layer of the constant temperature drying oven is 120~150mm, the distance between the sample liquid level and the horizontal line of the bottom of the mercury ball of the thermometer in the constant temperature drying oven is 10~20mm, and the distance between the symmetry axis of the weighing bottle and the thermometer shall not exceed 70mm. Keep the temperature of the constant temperature drying oven for 2h after it rises to the test temperature. Then, move the weighing bottle into the dryer (c), cool to room temperature, and weigh. 4.6.3 Calculation
The heating loss X expressed as a mass percentage is calculated according to formula (4):7
HG2092-91
Wherein: m is the mass of the weighing bottle and the sample before heating, gm, and the mass of the weighing bottle and the sample after heating, g: m-the mass of the sample, g.
4.6.4 Allowable difference
The difference between the results of two parallel determinations shall not exceed 0.05%, and the arithmetic mean shall be taken as the heating loss of the sample. 4.7 Determination of thermal stability index
The determination shall be carried out in accordance with GB1680,
5 Inspection rules
5.1 Chlorinated paraffin-52 shall be inspected by the quality inspection department of the manufacturer, and the manufacturer shall ensure that all products leaving the factory meet the requirements of this standard (the thermal stability index shall be inspected at least once every six months, and other items shall be inspected at the factory). Each batch of products must be accompanied by a quality certificate in a certain format when it leaves the factory.
5.2 The products of each tank are regarded as a batch, and sampling is carried out in accordance with the provisions of GB6680. 5.3 Mix the samples evenly, and pack them equally in two clean, dry brown glass bottles with ground mouths, and label them. Indicate on the labels: manufacturer name, product name, batch number, sampler and sampling date. One bottle is sent to the inspection department for inspection, and the other bottle is sealed in a dark place for future reference.
5.4 If one of the indicators in the inspection results does not meet the requirements of this standard, re-sample from the packaging barrel with two trays for re-inspection. Even if one of the indicators in the re-inspection results does not meet the requirements, the whole batch of products cannot be accepted. 5.5 When the supply and demand parties have objections to the product quality, the user should raise it within two months after the product leaves the factory, and the two parties shall negotiate to resolve it. 6 Marking, packaging, transportation and storage
6.1 Marking
The packaging container should be firmly marked with the manufacturer's name, product name, batch number, production date, gross weight, this standard number and grade.
6.2 Packaging
This product is packaged in dry, clean, rust-free 200L galvanized iron plugs or iron drums. The drum cover gasket is made of wear-resistant plastic. The net weight is 200±0.5kg each
6.3 Transportation
During transportation, it should be loaded and unloaded gently to avoid collision and prevent sun and rain. 6.4 Storagebzxz.net
Chlorinated paraffin-52 should be stored in a well-ventilated, cool and dry warehouse or tree to prevent sun and rain. 8
Additional instructions:
HG2092
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is under the jurisdiction of Shanxi Chemical Research Institute. This standard was drafted by Yongxin-Shenyang Chemical Plant at its own expense. The main drafters of this standard are Miao Fengqin, Chen Desen, Yu Chunxiang and Wang Xinzhi. From the date of implementation of this standard, the former standard HG2-1382-80 "Paraffin-52" issued by the Ministry of Chemical Industry of the People's Republic of China will be invalidated.
People's Republic of China
Chemical Industry Standard
Ammoniated Paraffin
HG2091～2092-91
Editor's Office of Chemical Industry Standard
(Chemical Industry Standardization Research Institute)
Postal code: 100013
Printing Chemical Industry Standardization Research Institute
Copyright reserved. No reproduction allowed
Format: 880×12301/16 Printing sheet
Word count: 17000
First edition in November 1992
First printing in November 1992
Print count: 1—500
16-—260~160
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