US 12,435,022 B2
Process for recovery of hydrate inhibitors
Terrance John Larry Trofimuk, Calgary (CA); and Daniel John Domanko, Calgary (CA)
Assigned to VME Canada LTD., Calgary (CA)
Appl. No. 17/623,191
Filed by VME Canada LTD., Calgary (CA)
PCT Filed Jun. 12, 2020, PCT No. PCT/CA2020/050812
§ 371(c)(1), (2) Date Dec. 27, 2021,
PCT Pub. No. WO2020/248066, PCT Pub. Date Dec. 17, 2020.
Claims priority of provisional application 62/861,568, filed on Jun. 14, 2019.
Prior Publication US 2022/0356136 A1, Nov. 10, 2022
Int. Cl. C07C 29/76 (2006.01); B01D 3/06 (2006.01); B01D 3/10 (2006.01); B01D 3/14 (2006.01); B01D 61/42 (2006.01); C02F 1/04 (2023.01); C02F 1/06 (2023.01); C02F 1/469 (2023.01); C02F 101/34 (2006.01); C02F 103/10 (2006.01); C07C 29/84 (2006.01); C09K 8/52 (2006.01)
CPC C07C 29/76 (2013.01) [B01D 3/06 (2013.01); B01D 3/103 (2013.01); B01D 3/143 (2013.01); B01D 61/422 (2013.01); B01D 61/428 (2022.08); C02F 1/046 (2013.01); C02F 1/06 (2013.01); C02F 1/4691 (2013.01); C02F 1/4695 (2013.01); C07C 29/84 (2013.01); C09K 8/52 (2013.01); C02F 2101/34 (2013.01); C02F 2103/10 (2013.01); C09K 2208/22 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A process for recovering glycol from a process stream comprising glycol, water, dissolved salts, and hydrocarbons, the process comprising:
a) subjecting the process stream to a salt-enrichment process to obtain a salt-enriched stream having a salt concentration higher than a salt concentration of the process stream, and a salt-reduced stream, wherein the salt-enrichment process comprises an electro-separation process and/or a deionization process;
b) subjecting the salt-enriched stream to a glycol reclaiming process to separate the salts and at least a portion of the hydrocarbons from the salt-enriched stream to obtain a substantially salt-free water-glycol stream; and
c) blending the salt-reduced stream from step a) with the substantially salt-free water-glycol stream to produce a reclaimed water-glycol stream.