Parkes processn.

Brit.

/ˈpɑːks ˌprəʊsɛs/, U.S.

/ˈpɑrks ˌprɑsɛs/

Forms: 1800s– Parkes process, 1800s– Parkes' process, 1900s– Parke's process (irregular).

Origin: From a proper name, combined with an English element. Etymons: proper name Parkes , process n.

Etymology: < the name of Alexander Parkes (1813–90), English chemist and inventor, who patented the process in 1850 ( Brit. Pat. 13,118) + process n.

Metallurgy.

A process for extracting silver and gold from molten lead by adding zinc, which forms an alloy with the precious metals that collects on the surface.

ΘΚΠ

society > occupation and work > industry > working with specific materials > working with metal > [noun] > refining > refining lead

Pattinson's process1852

Parkes process1857

pattinsonization1870

pattinsonation1881

1857 J. A. Phillips & J. Darlington Rec. Mining & Metallurgy 180 (heading) Parkes' process for desilverizing lead.

1892 W. Crookes tr. R. von Wagner Man. Chem. Technol. ii. 180 A further advantage of the Parkes process is that a minimum proportion of gold, present in the work-lead, can be first extracted by a small addition of zinc..whilst the subsequent main quantity of silver extracted..is free from gold.

1912 J. W. Mellor Mod. Inorg. Chem. xxi. 382 Lead can be desilverized by means of Pattinson's or Parkes' process.

1923 U. R. Evans Metals & Metallic Compounds IV. 268 Parke's process..only serves to remove silver and gold, and would leave the objectionable impurities in the lead.

1969 R. F. Lang tr. F. A. Henglein Chem. Technol. 531 The refining of crude lead takes place in two steps: 1. refining proper... 2. desilvering by the aid of Zn (Parkes process).

2001 Mining Ann. Rev. (Nexis) Oct. (Commodities section) 1 The crude bullion from all these sources is traditionally fire-refined under caustic soda and any precious metal content is removed by the Parkes process.

This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022).

单词	parkes process
释义	Parkes processn. Brit. /ˈpɑːks ˌprəʊsɛs/, U.S. /ˈpɑrks ˌprɑsɛs/ Forms: 1800s– Parkes process, 1800s– Parkes' process, 1900s– Parke's process (irregular). Origin: From a proper name, combined with an English element. Etymons: proper name Parkes , process n. Etymology: < the name of Alexander Parkes (1813–90), English chemist and inventor, who patented the process in 1850 ( Brit. Pat. 13,118) + process n. Metallurgy. A process for extracting silver and gold from molten lead by adding zinc, which forms an alloy with the precious metals that collects on the surface. ΘΚΠ society > occupation and work > industry > working with specific materials > working with metal > [noun] > refining > refining lead Pattinson's process1852 Parkes process1857 pattinsonization1870 pattinsonation1881 1857 J. A. Phillips & J. Darlington Rec. Mining & Metallurgy 180 (heading) Parkes' process for desilverizing lead. 1892 W. Crookes tr. R. von Wagner Man. Chem. Technol. ii. 180 A further advantage of the Parkes process is that a minimum proportion of gold, present in the work-lead, can be first extracted by a small addition of zinc..whilst the subsequent main quantity of silver extracted..is free from gold. 1912 J. W. Mellor Mod. Inorg. Chem. xxi. 382 Lead can be desilverized by means of Pattinson's or Parkes' process. 1923 U. R. Evans Metals & Metallic Compounds IV. 268 Parke's process..only serves to remove silver and gold, and would leave the objectionable impurities in the lead. 1969 R. F. Lang tr. F. A. Henglein Chem. Technol. 531 The refining of crude lead takes place in two steps: 1. refining proper... 2. desilvering by the aid of Zn (Parkes process). 2001 Mining Ann. Rev. (Nexis) Oct. (Commodities section) 1 The crude bullion from all these sources is traditionally fire-refined under caustic soda and any precious metal content is removed by the Parkes process. This entry has been updated (OED Third Edition, June 2005; most recently modified version published online March 2022). < n.1857
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