Invention Grant
- Patent Title: Process for the manufacture of ammonium tungstate ammonium paratungstate, ammonium metatungstate and hydrated tungsten trioxide
- Patent Title (中): 制造钨酸铵铵仲钨酸铵，偏钨酸铵和水合三氧化钨的方法
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Application No.: US477921Application Date: 1974-06-10
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Publication No.: US3936362APublication Date: 1976-02-03
- Inventor: Clarence D. Vanderpool , Martin B. MacInnis , James C. Patton, Jr.
- Applicant: Clarence D. Vanderpool , Martin B. MacInnis , James C. Patton, Jr.
- Applicant Address: CT Stamford
- Assignee: GTE Sylvania Incorporated
- Current Assignee: GTE Sylvania Incorporated
- Current Assignee Address: CT Stamford
- Main IPC: C01G41/00
- IPC: C01G41/00 ; C25B7/00 ; C25B1/00 ; C01B1/00 ; C25B1/22
Abstract:
Ammonium tungstate, ammonium paratungstate, ammonium metatungstate or hydrated tungsten trioxide is produced by passing tungstate anions through an anion exchange membrane into an aqueous solution containing ammonium cations under the driving force of an electrical potential for a time sufficient to achieve a pH within the range in which the desired tungsten compound will form.
Public/Granted literature
- US5696854A Batched character image processing Public/Granted day:1997-12-09
Information query
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