摘要:
The present invention is concerned with a novel biotransformation process for producing 17.beta.-N-monosubstituted carbamoyl-11-oxo-4-aza-5-.alpha.-androst-3-ones of the formula: ##STR1## These compounds are testosterone 5-.alpha. reductase inhibitors and are produced via a claimed novel biotransformation process using the green algae, Selenastrum capricornutum.
摘要:
Disclosed is a process for recovering and recycling waste methanesulfonic acid (MSA) and phosphorous acid (H.sub.3 PO.sub.3) in a bisphosphonation process for reuse in the process. The recovery process involves treating a waste crude mother liquor stream with HCl to remove sodium ion, as sodium chloride, recovering HCl--H.sub.2 O by atmospheric distillation, separating and dehydrating a mixture of methanesulfonic acid and phosphorous acid by vacuum distillation for recycle. The substantially dry methanesulfonic acid and phosphorous acid, and previous HCl, can all be recycled back to the process for reuse.
摘要翻译:公开了一种在二膦酸化方法中回收和回收废甲烷磺酸(MSA)和亚磷酸(H 3 PO 3)以在该方法中再利用的方法。 回收过程包括用HCl处理废粗母液流以除去钠离子,作为氯化钠,通过常压蒸馏回收HCl-H 2 O,通过真空蒸馏分离和脱水甲磺酸和亚磷酸的混合物以进行再循环。 基本上干燥的甲磺酸和亚磷酸以及先前的HCl都可以循环回该过程进行再利用。
摘要:
A process is described for the acclimation and enrichment of an activated sludge culture for the degradation of high concentrations of methanesulfonic acid, so as to render it non-toxic to the aquatic environment.
摘要:
Disclosed is a process for removing by-product phosphorus-containing (PO.sub.x) materials, alendronate and alendronate byproducts from crude mother liquors in an omega amino-1-hydroxy-C.sub.2 -C.sub.6 alkylidene-1,1-bisphosphonic acid synthesis process, e.g. alendronate sodium. Calcium chloride is added first to the crude mother liquors, then calcium oxide to precipitate the PO.sub.x materials, then neutralized to about pH 7 to complete precipitation. Substantially all of the alendronate sodium active ingredient is removed from the precipitate. Following filtration, the PO.sub.x filtercake can then be disposed of by incineration, landfilling or reclamation of usable phosphorus as fertilizer. The remaining filtrate can then be further treated in an environmentally acceptable manner by wastewater treatment or recycling to the process.