发明名称 |
PROCESS FOR PRODUCING CRYSTALLINE DTPMP |
摘要 |
The present invention relates to crystallizates of the pure aminoalkylenephosphonic acid DTPMP in three crystal polymorphs and to a process for obtaining solid crystalline DTPMP by a preferably one-stage crystallization from an aqueous product mixture comprising DTPMP, wherein the process comprises the following process steps: a) introducing seed crystals comprising DTPMP into an aqueous crude product comprising DTPMP with a total proportion in the range from 10 to 65 percent by mass up to a suspension density in the range from 1% to 25%, b) introducing kinetic energy into the aqueous crude product to precipitate a crystallizate containing DTPMP as pure acid with a total content of at least 75% by mass, c) removing the crystallizate formed from the aqueous crude product by sedimentation and/or filtration, such that DTPMP is obtained as a solid end product in the form of a crystallizate. |
申请公布号 |
EP3149014(A1) |
申请公布日期 |
2017.04.05 |
申请号 |
EP20150729105 |
申请日期 |
2015.06.02 |
申请人 |
Zschwimmer & Schwarz Mohsdorf GmbH & Co.KG |
发明人 |
KREHER, Thomas;LIEBSCH, Stephan;RUDOLPH, Carsten |
分类号 |
C07F9/38 |
主分类号 |
C07F9/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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