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1,922 ប្លង់មាន • 17 ប្រភេទរង

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ប្លង់ (1,922)

$Rubber Squeeze Bulb: Latex Coagulated Inside a Split Mould Coated with Calcium Nitrate (Szegvari, Anode, US 1,949,502)$

បង្ហាញ 24 ក្នុងចំណោម 1922

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រុករកប្រភេទរង

Scientific Revolution (1600–1760)

Industry 5.0 — Open Knowledge & AI Collaboration (2026)

Renaissance (1400–1600)

Industry 4.0 — Computers & Digital Automation (1960)

Industry 3.0 — Assembly Line & Mass Production (1913)

Industry 2.0 — Electricity, Steel & Oil (1870)

Industry 1.0 — Steam & Mechanization (1760)

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ប្លង់ (1,922)

Phosphor Bronze Wire: Cast Billet Extruded at 570-620 °C, then Cold Drawn without Annealing (Barthel, Lurgi, US 2,079,239)

Phosphor Bronze Ingot: 90 Copper Melted under Charcoal with 10 Phosphor-Tin, Stirred with Graphite (Thurston)

Phosphor-Tin: Sponge Tin and Stick Phosphorus Layered in Charcoal and Heated in a Sealed Crucible (Berthold, US 658,230)

Rubber Squeeze Bulb: Latex Coagulated Inside a Split Mould Coated with Calcium Nitrate (Szegvari, Anode, US 1,949,502)

Acrylic Pellets: Methyl Methacrylate Stirred into Beads in Gelatine Water at 75 °C (Crawford & McGrath, ICI, US 2,108,044)

Benzoyl Peroxide: Benzoyl Chloride Shaken with Cold 10 % Hydrogen Peroxide and Lye (Pechmann & Vanino 1894)

Hydrogen Peroxide 10 %: the 3 % Solution Evaporated in Air at 75 °C, Checked with Permanganate (Thorpe 1912)

Benzoyl Chloride: Benzoic Acid Heated with Phosphorus Pentachloride, then Fractionated (Thorpe 1912)

Phosphorus Pentachloride: Dry Chlorine Passed over Cooled Phosphorus Trichloride (Thorpe 1912)

Benzoic Acid: Sublimed from Gum Benzoin into a Paper Cone at 170 °C (Mohr, after Thorpe 1912)

Activated Alumina: Aluminium Trihydrate Heated at 350 °C While Hot Air Carries the Steam Away (Derr, Alcoa, US 2,015,593)

Cobalt Molybdate Catalyst: Acid-Washed Alumina Impregnated to 6.5 % Molybdenum and 0.8 % Cobalt, Pelleted (Hoog, Shell, US 2,608,521)

Cobalt Nitrate: Cobalt Oxide Dissolved in Nitric Acid (Thorpe 1912)

Regular Gasoline, Research Octane 95.7: Cracked Gasoline, Reformate, Polymer, Iso-hexanes and Hydro-treated Gasoline with 2.7 cc Lead (Gulf, US 3,071,535)

Hydro-treated Gasoline: Cracked Light Gas Oil and Isoheptanes Desulphurised with Hydrogen over Cobalt Molybdate at 700 °F (Gulf, US 3,071,535)

Iso-hexanes and Isopentane: Light Straight-Run Gasoline Isomerised over Platinum-Alumina with Hydrogen (Gulf, US 3,071,535)

Polymer Gasoline: Propylene from Cracked Gas Polymerised over Phosphoric Acid (Gulf, US 3,071,535)

Silica-Alumina Cracking Catalyst, 85 % Silica and 15 % Alumina: Water Glass Gelled with Acid, Alumina Precipitated on It (Thomas & Ahlberg, UOP, US 2,285,314)

Coker Gas Oil and Petroleum Coke: Vacuum Residue Delayed-Coked at about 920 °F (Gulf, US 3,071,535)

Heavy Gas Oil: the 620-1,050 °F Cut from Atmospheric and Vacuum Distillation of Crude Oil (Gulf, US 3,071,535)

FCC Gasoline: Gas Oil Cracked over Fluidised Silica-Alumina at 975 °F, 71.5 % Conversion (Gulf, US 3,071,535)

Premium Gasoline, Research Octane 102.7: Alkylate, Reformate, Light Cracked Gasoline and Isopentane with 2.7 cc Lead (Gulf, US 3,071,535)

Isopentane: the 29-30 °C Cut of the Lightest Gasoline (Mabery & Hudson 1897)

Tetraethyl Lead: Steam-Distilled from the Reaction Mass in Water Brought to pH 7.5 with Dilute Sulphuric Acid (Bake & Parmelee, du Pont, US 2,038,703)