公开(公告)号：US3607929A

公开(公告)日：1971-09-21

申请号：US3607929D

申请日：1968-01-03

Applicant: STAMICARBON

Inventor： PECASSE ALBERTUS H ,  BONNEMA JENTJE ,  GEURTS GERARDUS A

IPC: C07C227/34 ,  C07C20060101 ,  C07C229/26 ,  C07C99/12 ,  C07C101/24

CPC classification number: C07C51/487

Abstract: A process for the purification of optically active lysine monohydrochloride, containing racemic lysine monohydrochloride as an optical impurity, is disclosed. In this process the solid salt is treated with water to effect an at least partial dissolution or extraction of the optical antipod of the lysine monohydrochloride which is present in the original salt. The aqueous solution thus formed is separated from the solid phase before an equilibrium state is reached, the solid phase thus obtained being of lower optical purity than the original salt.

公开(公告)号：US3884644A

公开(公告)日：1975-05-20

申请号：US32076573

申请日：1973-01-03

Applicant: STAMICARBON

Inventor： BONNEMA JENTJE ,  SIMON HENRI J H

IPC: C01C1/24 ,  B01D9/02

CPC classification number: C01C1/24

Abstract: An improvement in a process for recovering ammonium sulfate from a contaminated, aqueous ammonium sulfate Solution containing both tarry organic and heavy contaminants (e.g., from Group VIII of the Periodic Table) is disclosed wherein a compound, or several compounds, which can form complexes together with said metal ions, and the solution is then treated with one, or several, water-soluble organic substances which, at least in combination with a saturated ammonium sulfate solution, are capable of forming a two-layer liquid phase system therewith. The resultant two layers may be separated into an aqueous phase containing purified ammmonium sulfate and an organic phase containing the organic substance, organic contaminants and metallic contaminants. The ammonium sulfate can be recovered as waterwhite, cubical crystals.

Abstract translation: 公开了一种从污染的含水硫酸铵中回收硫酸铵的方法的改进，所述硫酸铵水溶液含有焦油状有机物和重污染物（例如，从周期表的VIII族），其中可以形成络合物的化合物或几种化合物 与所述金属离子反应，然后用一种或几种水溶性有机物质处理溶液，该有机物质至少与饱和硫酸铵溶液组合，能与其形成双层液相体系。 所得的两层可以分离成含有纯化的硫酸铵和含有有机物质的有机相，有机污染物和金属污染物的水相。 硫酸铵可以回收成水白色立方晶体。

公开(公告)号：US3876508A

公开(公告)日：1975-04-08

申请号：US38639973

申请日：1973-08-07

Applicant: STAMICARBON

Inventor： BONNEMA JENTJE ,  SIMON HENRI J H

IPC: C07C121/32

CPC classification number: C07C253/34 ,  Y10S203/03 ,  C07C255/08

Abstract: A process relating to the manufacture of acrylonitrile is described with particular reference to the stripping technique for recovery of small amounts of dissolved acrylonitrile from the acidic aqueous solution obtained by the cooling of the hot reaction gases from the synthesis step itself. The disclosure points out that by maintaining the pH of the feed at a value of 5 or less and desirably also maintaining a bottom product temperature in the distillation column below 100.degree. C, fouling of the distillation column is substantially obviated.

公开(公告)号：US3647754A

公开(公告)日：1972-03-07

申请号：US3647754D

申请日：1970-03-27

Applicant: STAMICARBON

Inventor： BONNEMA JENTJE ,  PIJPERS EMANUEL M J

IPC: C08G2/06 ,  C08G1/02 ,  C08G1/12

CPC classification number: C08G2/06

Abstract: A PROCESS FOR THE PREPARATION OF MACROMOLECULAR FORMALDEHYDE POLYMERS IS DESCRIBED WHEREIN FORMALDEHYDE CONTAINING SUBSTANTIAL AMOUNTS OF WATER, E.G., FROM 0.5% UP TO 7% OR EVEN MORE, MAY BE POLYMERIZED. THE CATALYSTS USED FOR THIS PROCESS ARE CERTAIN TITANIUM COMPOUNDS DISSOLVED IN AN INERT LIQUID MEDIUM, SUCH AS TITANIC ESTERS OF ALCOHOLS, CYCLO ALCOHOLS, PHENOLS AND THIOPHENOLS; TITANIUM SALTS OF ORGANIC SALTS AND OTHER ORGANIC TITANIUM COMPOUNDS.