http://www.montana.com/formulary/BULK-PRC1.html (http://www.montana.com/formulary/BULK-PRC1.html)
Post 249833 (https://www.thevespiary.org/talk/index.php?topic=7258.msg24983300#msg24983300)
(lugh: "Study More Chemistry!!!", Chemistry Discourse), the industrial method of manufacturing glacial acetic acid uses sulfuric acid as a drying agent :)Patent DE220705 (http://l2.espacenet.com/dips/viewer?PN=DE220705&CY=gb&LG=en&DB=EPD)
,Patent US1463209 (http://l2.espacenet.com/dips/viewer?PN=US1463209&CY=gb&LG=en&DB=EPD)
,Patent FR612595 (http://l2.espacenet.com/dips/viewer?PN=FR612595&CY=gb&LG=en&DB=EPD)
,Patent FR449035 (http://l2.espacenet.com/dips/viewer?PN=FR449035&CY=gb&LG=en&DB=EPD)
andPatent US1196329 (http://l2.espacenet.com/dips/viewer?PN=US1196329&CY=gb&LG=en&DB=EPD)
:) Electrolytic purification methods can bee found inPatent US1104978 (http://l2.espacenet.com/dips/viewer?PN=US1104978&CY=gb&LG=en&DB=EPD)
andPatent US1210792 (http://l2.espacenet.com/dips/viewer?PN=US1210792&CY=gb&LG=en&DB=EPD)
:) Some methods of concentration by distillation of acetic acid arePatent GB218271 (http://l2.espacenet.com/dips/viewer?PN=GB218271&CY=gb&LG=en&DB=EPD)
,Patent GB218272 (http://l2.espacenet.com/dips/viewer?PN=GB218272&CY=gb&LG=en&DB=EPD)
,Patent FR594925 (http://l2.espacenet.com/dips/viewer?PN=FR594925&CY=gb&LG=en&DB=EPD)
,Patent GB204196 (http://l2.espacenet.com/dips/viewer?PN=GB204196&CY=gb&LG=en&DB=EPD)
,Patent GB187603 (http://l2.espacenet.com/dips/viewer?PN=GB187603&CY=gb&LG=en&DB=EPD)
,Patent US1477076 (http://l2.espacenet.com/dips/viewer?PN=US1477076&CY=gb&LG=en&DB=EPD)
,Patent GB230447 (http://l2.espacenet.com/dips/viewer?PN=GB230447&CY=gb&LG=en&DB=EPD)
,Patent GB296794 (http://l2.espacenet.com/dips/viewer?PN=GB296794&CY=gb&LG=en&DB=EPD)
,Patent GB3000923 (http://l2.espacenet.com/dips/viewer?PN=GB3000923&CY=gb&LG=en&DB=EPD)
,Patent GB356741 (http://l2.espacenet.com/dips/viewer?PN=GB356741&CY=gb&LG=en&DB=EPD)
andPatent GB298137 (http://l2.espacenet.com/dips/viewer?PN=GB298137&CY=gb&LG=en&DB=EPD)
:) Some non patent references are Chem Ztg 55 881 (1931), Chem and Met Eng 36 657 (1929), Ind Eng Chem 24 722 (1932) & 23 482 (1931) and Z Agnew Chem 20 148 (1916) :) Concentration of acetic acid by adsorption is disclosed inPatent GB332983 (http://l2.espacenet.com/dips/viewer?PN=GB332983&CY=gb&LG=en&DB=EPD)
and Z Physikal Chem 29 326 (1925) :) Removal of water by selective adsorption is patented inPatent GB314913 (http://l2.espacenet.com/dips/viewer?PN=GB314913&CY=gb&LG=en&DB=EPD)
,Patent US1492717 (http://l2.espacenet.com/dips/viewer?PN=US1492717&CY=gb&LG=en&DB=EPD)
,Patent US1492718 (http://l2.espacenet.com/dips/viewer?PN=US1492718&CY=gb&LG=en&DB=EPD)
,Patent US1817993 (http://l2.espacenet.com/dips/viewer?PN=US1817993&CY=gb&LG=en&DB=EPD)
,Patent GB338187 (http://l2.espacenet.com/dips/viewer?PN=GB338187&CY=gb&LG=en&DB=EPD)
,Patent DE230171 (http://l2.espacenet.com/dips/viewer?PN=DE230171&CY=gb&LG=en&DB=EPD)
,Patent DE282263 (http://l2.espacenet.com/dips/viewer?PN=DE282263&CY=gb&LG=en&DB=EPD)
andPatent DE292959 (http://l2.espacenet.com/dips/viewer?PN=DE292959&CY=gb&LG=en&DB=EPD)
:) Concentration of acetic acid by freezing is the subject ofPatent GB378463 (http://l2.espacenet.com/dips/viewer?PN=GB378463&CY=gb&LG=en&DB=EPD)
andPatent GB378463 (http://l2.espacenet.com/dips/viewer?PN=GB378463&CY=gb&LG=en&DB=EPD)
:) Some more applicable references arePatent US2275802 (http://l2.espacenet.com/dips/viewer?PN=US2275802&CY=gb&LG=en&DB=EPD)
, JACS 54 1429 (1932), 53 2881 (1931) & 58 2585 (1936), JCS 1751 (1910) and Ind Eng Chem 20 1379 (1928) :) Probably the most effective drying agent available to most bees would be anhydrous copper sulfate ;D :)Patent GB378463 (http://l2.espacenet.com/dips/viewer?PN=GB378463&CY=gb&LG=en&DB=EPD)
A calculated amount of potassium or sodium bisulfate may bee used instead of concentrated sulfuric acid
Does that mean a bisulfate can be used on Na or K nitrate to get pure HNO3, too? 8) 8)
Patent GB2182271 (http://l2.espacenet.com/dips/viewer?PN=GB2182271&CY=gb&LG=en&DB=EPD)
must be wrong cos it describes a clamping device.