T/HNSXHJJYJH T/HCER001-2019 Active Group standards

T/HNSXHJJYJH T/HCER001-2019 Reactive industrial grade chromium oxide hydrate

Publish Date: 2019-02-01 Implement Date: 2019-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/HNSXHJJYJH T/HCER001-2019

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Chemical production

Publish Date: 2019-02-01

Implement Date: 2019-02-01

Scope

Scope: This standard specifies the raw materials and processes, quality requirements, test methods, inspection rules, marking, packaging, transportation, and storage of recycled industrial-grade chromium hydroxide. This standard applies to powdered industrial-grade chromium hydroxide containing certain impurities, which is produced primarily from chromium-containing electroplating wastewater, tanned fur wastewater, and processing wastewater, and undergoes pretreatment, reduction, sedimentation, and filtration processes. It is mainly used as a raw material for preparing trivalent chromium salts and chromium trioxide. Main technical content: 1. Scope: This standard specifies the raw materials and processes, quality requirements, test methods, inspection rules, marking, packaging, transportation, and storage of recycled industrial-grade chromium hydroxide. This standard applies to powdered industrial-grade chromium hydroxide containing certain impurities, which is produced primarily from chromium-containing electroplating wastewater, tanned fur wastewater, and processing wastewater, and undergoes pretreatment, reduction, sedimentation, and filtration processes. It is mainly used as a raw material for preparing trivalent chromium salts and chromium trioxide. 5. Quality requirements: - Appearance: The recycled industrial-grade chromium hydroxide product is a blue-green powder. - Quality: After drying at (105±2)°C, the quality of the recycled industrial-grade chromium hydroxide shall meet the requirements of Table 1. Table 1 Quality requirements for recycled industrial-grade chromium hydroxide Serial number Item Limit 1 Chromium content (as Cr2O3) (dry basis), w/% ≥ 42 2 Water content, w/% ≤ 35 3 Water-soluble chromium (as Cr), w/% ≤ 0.034 4 CaO, w/% ≤ 0.15 5 Fe, w/% ≤ 0.56 6 Cu, w/% ≤ 0.57 7 Ni, w/% ≤ 0.58 8 Zn, w/% ≤ 0.59 9 As, w/% ≤ 0.002 10 Pb, w/% ≤ 0.05 11 Cd, w/% ≤ 0.001 12 Hg, w/% ≤ 0.