Sulfuric Acid → Sulfuric Acid

温度

70 °C

Aqueous solutions of barium chloride (0.008 mol/1) and sulfuric acid (0.005 mol/1) were prepared by dissolving 1.974 gm of barium chloride (special reagent grade) and 0.505 gm of sulfuric acid (special reagent grade) into 1,000 gm of ion-exchanged water. Each solution was heated at 70° C. The barium chloride solution was added dropwise over a period of 10 minutes to the sulfuric acid solution, while the latter was stirred at 1,000 rpm by a U-shaped blade. After the addition, the mixture was stirred for a further 3 minutes to complete the reaction. The mixture was kept at pH 3.5 during the reaction. After cooling to the room temperature, the reaction mixture was filtered through a 5C filter paper, washed with water, and dried at 105° C. for 2 hours to obtain 1.12 gm of barium sulfate powder.

1. additionAfter the addition
2. stirringthe mixture was stirred for a further 3 minutes
3. customthe reaction
4. customThe mixture was kept at pH 3.5 during the reaction
5. temperatureAfter cooling to the room temperature
6. filtrationthe reaction mixture was filtered through a 5C
7. filtrationfilter paper
8. washwashed with water
9. customdried at 105° C. for 2 hours

ORDレコード

ord-aeade34999b442e3b364c7d8ea9abb78

出典データセット

uspto-grants-1993_11

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US05262148