公开(公告)号：US20240336790A1

公开(公告)日：2024-10-10

申请号：US18624204

申请日：2024-04-02

Applicant: Ecolab USA Inc.

Inventor： Petia Todorova Tontcheva ,  Rangarani Karnati ,  Franklin Defraine Mackin ,  Paul Michael Balent ,  Samuel Pharr Mooney ,  Paul Joseph Zinn ,  David Wayne Scheimann

IPC: C09D7/00 ,  C02F1/52 ,  C02F103/14 ,  C09D7/62

CPC classification number: C09D7/71 ,  C02F1/5245 ,  C09D7/62 ,  C02F2103/14

Abstract: Overspray treatment compositions for addition to a water source located within a paint overspray waterwash system located in a spray-paint booth, or a water source that is subsequently applied to such a paint overspray waterwash system for contact with a paint overspray include an amine-functionalized colloidal silica having about 0.1 μmol to 15.00 μmol of amine functionality per square meter of silica surface area, and optionally a coagulant. The compositions and methods described herein work within a pH range of 6.5 and 10 to provide treated paint oversprays. Addition of a flocculant to a treated overspray results in formation of associated complexes having low tack, which may be cleanly separated from the aqueous treatment residue. The aqueous treatment residue may be subjected to one or more additional cycles of use in the paint overspray waterwash system.

公开(公告)号：US11407668B1

公开(公告)日：2022-08-09

申请号：US15427574

申请日：2017-02-08

Applicant: Ecolab USA Inc.

Inventor： David B. Mitchell ,  Petia Todorova Tontcheva

IPC: C02F11/12 ,  C02F11/121 ,  C02F1/24 ,  C02F1/52 ,  C02F11/14

Abstract: A method for treating wastewater or sludge includes treating a sludge having a first viscosity of from about 3,000 cP to about 15,000 cP by shearing the sludge to obtain a treated sludge having a second viscosity of less than 3,000 cP, where the second viscosity persists for a period of time. The sludge may be thickened by dewatering. A chemical agent may be added to the thickened sludge during, before, or after shearing. The treated sludge may further be pumped, transported, or otherwise handled.