Can be used as dispersant, emulsifier, wetting agent, etc. Used in industrial detergents, pesticides, herbicides, water reducing agents for cement and concrete, dye spreading agents, coke and charcoal processing, dyes and pigments, petroleum industry, wax emulsions, etc.
IV. Preparation method:
Using sulfite pulp waste liquid as raw material, it is prepared by carefully processing, concentrating into solid matter, and drying.
5. Toxicity:
Non-toxic. Avoid prolonged contact with skin.
6. Identification test:
1. Prepare a 0.15g/L sample solution and follow the IT-10 method. The calcium sample should be positive.
2． Dissolve 100 mg of the sample in 50 ml of water, add 1 ml each of 10% acetic acid and 10% sodium nitrite solution, shake well and place at room temperature for 15 minutes. It should appear brown.
3. Take 0.1g/L sample solution and adjust it to pH 5. There will be a peak between 275nm and 280nm on its UV absorption spectrum.
7. Analysis of quality indicators:
1. Content of sulfonate sulfur Accurately weigh 1.0g of the sample and dissolve it in 400ml of water in a beaker. A stream of nitrogen gas was slowly passed over the surface of the liquid. Add 10 ml of nitric acid and shake the solution vigorously until the reaction calms down. Add 10ml of 70% perchloric acid and shake vigorously again. Place the uncovered beaker on the hot plate and heat the contents vigorously until the center of the bottom of the beaker becomes clear. Remove the beaker and cool to room temperature. Add 5ml of hydrochloric acid and heat until white smoke appears. After cooling, dilute with water to about 100ml, and adjust the pH value to 6±0.2 with 10% sodium hydroxide solution. Then heat the solution to boiling, add 15 ml of 10 barium chloride solution, and keep the solution in the beaker in a steam bath at 90 to 95°C overnight. Filter through ashless filter paper (No. 42, or equivalent) and rinse with 200ml warm water. Move the filter paper and the precipitate into a stable crucible. Heat the crucible slowly over a Bunsen burner to drive away the moisture. Then burn in a muffle furnace at 850°C for 1 hour. Take it out, cool it in a desiccator and weigh it. The particle size is nearly 0.0001g.
2． Calcium
(1) Strontium chloride solution Under stirring, add 164.7g of 60 perchloric acid to 500ml of distilled water in a 1L beaker. Then add 15.2g of strontium chloride hexahydrate and stir until completely dissolved. Transfer this solution into a 1L volumetric flask and dilute to volume with distilled water at room temperature. After adding the stopper, invert several times to mix the contents.
(2) For the standard solution, use the calibrated 1000mg/kg standard calcium solution (Mallinckrodt, or equivalent), gradually and quantitatively dilute it into a standard solution with a calcium content of 0.7mg/ml, and store it in polyethylene in a bottle.
(3) Sample solution Accurately weigh 1g of the pre-dried sample and dilute to 10.0ml. If there are particles in the sample solution, filter it through a 0.45 μm Millipore filter and discard the first few filtrate. First, take 5 ml of strontium chloride solution and put it into a 50 ml volumetric flask, then add 5.0 ml of this filtrate, then dilute to constant volume and mix well.
(4) Operation: Use an appropriately calibrated atomic absorption spectrophotometer and follow the specified steps of the instrument to measure the absorbance of the standard solution and sample solution at 422.7nm. The absorbance obtained from the sample solution shall not be greater than that of the standard solution.
3. Reducing sugar
(1) Basic lead acetate solution Take 80g of basic lead acetate, dissolve it in 220ml of water, stir overnight, and filter through No. 42 filter paper (or equivalent). Then use newly boiled water to dilute the supernatant to a relative density of 1.254.
(2) Copper reagent solution Take 28g of anhydrous disodium hydrogen phosphate and 40g of potassium sodium tartrate (KNaC4H4O6·4H2O), and dissolve them in 700ml of water. Add 100 ml of 1 mol/L sodium hydroxide and 8 g of copper sulfate pentahydrate, and then add 180 g of anhydrous sodium sulfate. Add 0.7134g of potassium iodate, and then dilute to 1000ml. After standing for several days, the top clear liquid of the solution was filtered through a sintered glass funnel of medium porosity.
(3) Glucose standard solution Accurately weigh 140 mg of dried glucose and dissolve it in 500 ml of water.
(4) Disodium hydrogen phosphate solution Take 19g of disodium hydrogen phosphate heptahydrate and dissolve it in 100 ml of water.
(5) Operation: Accurately weigh 1g of the sample, dissolve it in 50ml of water, and adjust the pH value to 6.9~7.2 with sodium hydroxide solution or acetic acid. Gradually add alkaline lead acetate solution until no further precipitation is felt. Add water to 250.0ml and mix thoroughly: centrifuge the mixture; transfer 10ml of the supernatant into a 50ml volumetric flask, and then dilute to about 35rnl. Add 2 ml or more of disodium hydrogen phosphate solution until no more precipitation occurs. Dilute to 50ml and mix well. Centrifuge at 2100 times gravity for 10 minutes. Take 5 ml of the supernatant into a test tube, add 5 ml of the reagent solution, and mix. Loosely plug the mouth of the test tube and place it in a boiling water bath for 40 minutes ± 10 seconds. After heating, immediately cool the test tube in cold water. Add 2 ml of 2.5 potassium iodide solution and 1.5 ml of 2 mol/L sulfuric acid. After thorough mixing, titrate with 0.005mol/L sodium thiosulfate and use starch indicator to record the consumed volume. Repeat the above operation with glucose standard solution (glucose standard solution 5rnl plus copper reagent 5ml), record the consumed volume as ‰. For each of the above titrations, use 5ml of water and bml of copper reagent solution as a blank at the same time to perform a blank titration. Let the consumed volume be ‰.
4.50 Viscosity of the sample liquid Accurately weigh 200g of the sample on a dry basis and dissolve it in 200ml of water in a 500ml beaker. Equilibrate the solution at 25°C, and then measure the viscosity of the solution using a Brookfield viscometer A (LVG type, or equivalent) using spindle No. 2 at 20 r/min.
8. Packaging, storage and transportation:
1. Packaging: double-layered packaging with plastic film lining and polypropylene woven bag outside, net weight 25kg/bag.
2. Storage: Store in a dry and ventilated place, pay attention to moisture-proofing. It will not deteriorate after long-term storage. If there are agglomerations, it will not affect the use effect after crushing or dissolving.
3. Transportation: This product is non-toxic and harmless, and is a non-flammable and explosive dangerous product. It can be transported by car or train.