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公开(公告)号：US3852273A
公开(公告)日：1974-12-03
申请号：US24972772
申请日：1972-05-02
Applicant: STAMICARBON
Inventor： DE ROOIJ A H
IPC: C07D201/04 , C07D201/16 , C07D41/06
CPC classification number: C07D201/16 , C07D201/04
Abstract: A process for preparing and recovering lactams by the so-called Beckmann rearrangement of the corresponding ketoximes in a sulfuric acid medium is disclosed, wherein the mixture of lactam and sulfuric acid medium obtained from the Beckmann rearrangement is mixed with an aqueous solution of ammonium sulfate obtained as a by-product in the synthesis of hydroxylammonium sulfate in the preparation of said ketoximes. The lactam is then extracted from the resulting less acidic solution and the remaining acid solution, comprising an aqueous solution of ammonium hydrogen sulfate, is thermally decomposed to produce recoverable sulphur dioxide. The process of this invention can be used in the production of lactams while avoiding the production of ammonium sulfate byproduct.
Abstract translation: 公开了通过在硫酸介质中相应酮肟的所谓贝克曼重排制备和回收内酰胺的方法，其中将从贝克曼重排得到的内酰胺和硫酸介质的混合物与得到的硫酸铵水溶液混合 作为在制备所述酮肟时合成羟基硫酸铵的副产物。 然后从所得的较少酸性溶液中提取内酰胺，并将包含硫酸氢铵水溶液的剩余酸溶液热分解以产生可回收的二氧化硫。
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公开(公告)号：US3835083A
公开(公告)日：1974-09-10
申请号：US32933373
申请日：1973-02-05
Applicant: STAMICARBON
Inventor： TINKELENBERG A
CPC classification number: C08G12/32 , C01B33/325 , C08K3/34 , C08L61/28
Abstract: A PROCESS FOR PREPARING STABLE MELAMINE-FORMALDEHYDE RESIN SOLUTIONS HAVING IMPROVED PROPERTIES IS DISCLOSED WHEREIN AN AQUEOUS SOLUTION OF A WATER-SOLUBLE SILICATE IT PRESENT BEFORE, DURING OR AFTER THE CONDENSATION REACTION OF THE MELAMINE AND FORMALDEHYDE. THE RESULTING RESIN SOLUTIONS ARE SUITABLE FOR A VARIETY OF END USES WHEREIN MELAMINE-FORMALDEHYDE RESINS HAVE BEEN PREVIOUSLY USED, INCLUDING THE IMPREGNATION OF PAPER TO BE USED IN LAMINATES.
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453.发明授权
公开(公告)号：US3817718A
公开(公告)日：1974-06-18
申请号：US81522669
申请日：1969-04-10
Applicant: STAMICARBON
IPC: C01C1/24 , B01D9/02 , C01B21/54 , C07C103/52
CPC classification number: C01C1/24
Abstract: A PROCESS FOR RECOVERING AMMONIUM SULPHATE FROM AN AQUEOUS SOLUTION OF AMMONIUM SULPHATE AND METHIONINE IS DISCLOSED, WHEREIN THE AMMONIUM SULPHATE IS RECOVERED FROM THE SOLUTION BY CRYSTALLIZATION AT A WEIGHT RATIO OF METHIONINE/AMMONIUM SULPHATE OF BETWEEN 0.01 AND 0.3, AND AT A PH OF BETWEEN 0.2 AND 6. THE AMMONIUM SULPHATE RECOVERED BY THE CRYSTALLIZATION STEP CONTAINS LESS THAN 1% BY WEIGHT OF METHIONINE, AND IS IN A FORM SUITED FOR FERTILIZER PRODUCTION.
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454.发明授权Process for the preparation of aspartyl dipeptide esters involving little racemization 失效制备涉及轻度化疗的ASPARTYL糖尿病肾病的方法
公开(公告)号：US3808190A
公开(公告)日：1974-04-30
申请号：US14463971
申请日：1971-05-18
Applicant: STAMICARBON
Inventor： DAHLMANS J , DASSEN B , BOESTEN W
IPC: A23L27/30 , C07K5/075 , A23L1/26 , C07C103/52
CPC classification number: C07K5/0613 , A23L27/32 , Y10S530/801
Abstract: A PROCESS FOR PREPARING ASPARTIC AMINO ACID ESTERS IS DISCLOSED WHEREIN N-CARBOBENZOXY ASPARTIC ACID ANHYDRIDE, AN AMINO ACID ESTER SALT AND A BASE ARE REACTED TOGETHER PRODUCING N-CARBOBENZOXY ASPARTIC AMINO ACID ESTER. THE N-CARBOBENZOXY ASPARTIC AMINO ACID ESTER IS THEN HYDROGENATED IN THE PRESENCE OF A PALLADIUM CATALYST TO SPLIT THE N-CARBOBENZOXY GROUP FROM THE ASPARTIC AMINO ACID ESTER. THE ASPARTIC AMINO ACID ESTERS HAVE SWEETENING PROPERTIES AND CAN BE USED AS A SWEETENING AGENT. ALPHA AND BETA ASPARTIC AMINO ACIDS CAN BE PRODUCED.
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公开(公告)号：US3806495A
公开(公告)日：1974-04-23
申请号：US27174172
申请日：1972-07-14
Applicant: STAMICARBON
Inventor： SCHOEN L
CPC classification number: C08G18/4269 , C08G63/823
Abstract: HYDROXYL-TERMINATED POLYLACTONES CAN BE PREPARED IN A TWO-STEP PROCESS, THE FIRST STEP OF WHICH INCLUDES POLYMERIZING MONOMERIC LACTONE IN THE PRESENCE OF A CATALYST WITH THE SECOND STEP COMPRISING REACTIG THE RESULTING POLYLACTONE WITH A MODIFIED CONTAINING HYDROXYL AND/OR AMINO GROUPS IN THE PRESENCE OF A CATALYST. THE SECOND STEP CAN BE CARRIED OUT ON INDEPENDENTLY PRODUCED POLYLACTONES.
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Patent Agency Ranking456.发明授权
公开(公告)号：US3801343A
公开(公告)日：1974-04-02
申请号：US3801343D
申请日：1972-02-25
Applicant: STAMICARBON
Inventor： LEMMENS J
CPC classification number: C04B20/068 , C04B14/12 , C04B14/10
Abstract: The invention relates to a process of preparing a lightweight granular aggregate for use in concrete objects and structures, by an intimately mixing a clayey material with materials that help to reduce the weight, granulating this mixture and then heating the granules at least to the temperature at which their mass expands. Use is made of a combination of two known auxiliary materials, the first being a porous inorganic material with open pores, added in an amount of 10-20 percent by volume with respect to the clayey material, and substantially having a grain size below 2 mm., and the second consisting of one or more substances that, upon heating, yield gaseous components at a temperature over 800* C. Use is made of a porous inorganic material having a softening temperature equal to or lower than that of the clayed material.
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公开(公告)号：US3780083A
公开(公告)日：1973-12-18
申请号：US3780083D
申请日：1972-02-14
Applicant: STAMICARBON
IPC: C07C20060101 , C07C121/02 , C07C121/34
CPC classification number: C07C255/00 , Y02P20/582
Abstract: SCHIFF BASES DERIVED FROM BUTANONE AND AN ALIPHATIC PRIMARY AMINE ARE CATALYSTS IN THE PREPARATION OF A-MONOCYANOETHYLATED BUTANONE BY REACTING ACRYLONITRILE WITH AT LEAST AN EQUIMOLAR QUANTITY OF ACRYLONITRILE IN THE PRESENCE OF AN ACID. THE A-MONO-CYANOETHYLATED BUTANONES, SUCH AS 4-METHYL-5-OXOHEXANE NITRILE AND 5-OXOHEPTANE NITRILE ARE PRODUCED WITH ONLY MINOR AMOUNTS OF CONTAMINANT''S THAT ARE EASILY REMOVED. THE A-MONO-CYANOETHYLATED BUTANONES ARE USEFUL FOR THE PREPARATION OF DIAMINES, KETOCARBOXYLIC ACIDS OR KETO-AMIDES.
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公开(公告)号：US3729304A
公开(公告)日：1973-04-24
申请号：US3729304D
申请日：1971-06-15
Applicant: STAMICARBON
Inventor： ELMENDORP J , DE ROOIJ A
CPC classification number: C05B7/00
Abstract: A process for synthesizing an oxime by reacting an organic carbonyl compound with a hydroxylammonium sulfate and ammonium hydrogen sulfate in the presence of ammonium dihydrogen phosphate whereby an aqueous solution of phosphoric acid and ammonium sulfate is obtained after separating the oxime product therefrom. The phosphoric acid, ammonium sulfate solution can be used in processing rock phosphate with the aid of nitric acid to product a fertilizer composition having a N to P2O5 ratio of approximately 1:1.
Abstract translation: 在磷酸二氢铵存在下使有机羰基化合物与羟基硫酸铵和硫酸氢铵反应合成肟的方法，由此在分离出肟产物后得到磷酸和硫酸铵的水溶液。 磷酸，硫酸铵溶液可用硝酸处理岩石磷酸盐，产生N = P2O5比约为1:1的肥料组合物。
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459.发明授权
公开(公告)号：US3720758A
公开(公告)日：1973-03-13
申请号：US3720758D
申请日：1970-09-21
Applicant: STAMICARBON
Inventor： DE ROOIJ A , AGGENBACH P
IPC: C01B21/14 , C01C1/24 , C01C1/00 , C07C131/10
CPC classification number: C01B21/1418
Abstract: Hydroxylammonium salt solution prepared by catalytically reducing nitrate ions in aqueous solution using molecular hydrogen in a buffered reaction medium containing at least twice the number of sulphate ions as phosphate ions in which the ammonia produced as a by-product of the reaction is removed from the resulting solution as ammonium sulphate is disclosed.
Abstract translation: 在含有至少两倍硫酸根离子数量的缓冲反应介质中，使用分子氢在水溶液中催化还原硝酸根离子制备的羟基铵盐溶液，其中作为反应副产物产生的氨作为磷酸根离子被从所得到的反应中除去 公开了作为硫酸铵的溶液。
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460.发明授权
公开(公告)号：US3720755A
公开(公告)日：1973-03-13
申请号：US3720755D
申请日：1971-03-26
Applicant: STAMICARBON
Inventor： DUYVERMAN C , GORGELS M
CPC classification number: C01B21/1418 , C01B17/90 , C01B25/234
Abstract: A process for preparing a solution of hydroxylammonium phosphate which includes catalytic reduction of nitrate ions in an aqueous solution containing phosphoric acid using molecular hydrogen. In order to maintain the activity of the catalyst the phosphoric acid to be fed to the synthesis zone is first freed of heavy metal contaminants by contacting the phosphoric acid for a sufficient time with hydrogen and an absorbent consisting of a metal of the platinum group.
Abstract translation: 一种制备磷酸氢氧化铵溶液的方法，其包括使用分子氢在含磷酸的水溶液中催化还原硝酸根离子。
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