公开(公告)号：US20140121145A1

公开(公告)日：2014-05-01

申请号：US14058344

申请日：2013-10-21

Applicant: BASF SE

Inventor： Thomas Paasche ,  Henning Urch

IPC: H05K3/06 ,  C09K13/00

CPC classification number: H05K3/067 ,  C23F1/18 ,  C23F1/44 ,  C23F1/46 ,  C23G1/103 ,  C23G1/36 ,  H05K2203/0789

Abstract: A process for treatment of shaped bodies comprising copper, wherein an aqueous mixture (M) comprising (a.) chlorine-free acids without carboxyl groups, (b.) oxidizing agents, (c.) aqueous solvent and optionally additional additives is contacted with the shaped body. Another characteristic feature of the process is that the aqueous mixture (M) after the etching or pickling additionally comprises (e.) dissolved copper and is separated from the solid. Also encompassed is a process for workup of the aqueous mixture (M) which has been separated and additionally comprises dissolved copper by electrolysis. Further provided are mixtures (MI) comprising (a.) from 10 to 40% by weight of methanesulfonic acid, (b.) from 10 to 20% by weight of hydrogen peroxide and (c.) from 40 to 80% by weight of water, and the use thereof for etching or pickling of shaped bodies comprising copper.

Abstract translation: 一种处理包含铜的成形体的方法，其中包含（a）不含羧基的无氯酸（b）氧化剂，（c））水性溶剂和任选的其它添加剂的含水混合物（M）与 成型体。 该方法的另一个特征是蚀刻或酸洗后的含水混合物（M）还包括（例如）溶解的铜并与固体分离。 还包括已经分离的水性混合物（M）的后处理方法，并且还通过电解包含溶解的铜。 另外提供的是混合物（MI），其包含（a。）10至40重量％的甲磺酸，（b。）10至20重量％的过氧化氢和（c。）40至80重量％ 水及其用于蚀刻或酸洗包含铜的成形体的用途。

公开(公告)号：US20210114090A1

公开(公告)日：2021-04-22

申请号：US17042240

申请日：2019-03-21

Applicant: BASF SE

Inventor： Tobias Urban ,  Henning Urch ,  Michael Koch ,  Thomas Paasche

IPC: B22D29/00 ,  B22C1/22 ,  B22D31/00 ,  B22C5/08

Abstract: The present invention relates to a method of disintegrating a foundry mold comprising sand and a polyurethane binder. The present invention further relates to a method of disintegrating a foundry mold by contacting it with a composition comprising at least one carboxylic acid amide and at least one tyalkanolamine.