公开(公告)号：US3991047A

公开(公告)日：1976-11-09

申请号：US608249

申请日：1975-08-27

Applicant: Radomir Moudry ,  Bruno Domeisen ,  Hanswerner Philipp

Inventor： Radomir Moudry ,  Bruno Domeisen ,  Hanswerner Philipp

IPC: C01B17/50 ,  C01B17/74 ,  C01C1/24 ,  C01F5/12 ,  C07D201/04 ,  C07D201/16

CPC classification number: C07D201/04

Abstract: In a process for the preparation of lactam from cycloalkanone comprising reacting said alkanone with hydroxylamine sulfate to form the corresponding cycloalkanone oxime followed by Beckman rearrangement to yield said lactam and neutralization of the sulfuric acid formed by ammonia whereby ammonium sulfate is formed as a byproduct, the improvement which comprises reacting said ammonium sulfate with an alkaline-earth metal oxide or hydroxide to form an alkaline earth metal sulfate and ammonia, heating said alkaline-earth metal sulfate to decompose it into said alkaline-earth metal oxide and sulfur dioxide and/or sulfur trioxide, converting said sulfur dioxide and/or sulfur trioxide into sulfuric acid, whereby said sulfuric acid and said ammonia are capable of reuse in said process.

Abstract translation: 在由环烷酮制备内酰胺的方法中，包括使所述烷酮与硫酸羟胺反应形成相应的环烷酮肟，然后进行贝克曼重排，得到所述内酰胺并中和由氨形成的硫酸，由此形成副产物硫酸铵。 改进包括使所述硫酸铵与碱土金属氧化物或氢氧化物反应以形成碱土金属硫酸盐和氨，加热所述碱土金属硫酸盐以将其分解成所述碱土金属氧化物和二氧化硫和/或硫 三氧化硫，将所述二氧化硫和/或三氧化硫转化为硫酸，由此所述硫酸和所述氨能够在所述方法中再利用。

公开(公告)号：US3925365A

公开(公告)日：1975-12-09

申请号：US44106174

申请日：1974-02-11

Applicant: KANEBO LTD

Inventor： IZAWA NOBUO ,  KOHNO TOSHIHIKO

IPC: C07D201/12 ,  C07D201/16

CPC classification number: C07D201/12 ,  C07D201/16

Abstract: Epsilon -CAPROLACTAM MATERIAL SUCH AS A MONOMER, OLIGOMERS AND POLYMERS OF Epsilon -CAPROLACTAM AND MIXTURES OF THESE COMPOUNDS ARE PURIFIED FROM IMPURITY COMPOUNDS SUCH AS PHOSPHORIC ACID AND IONIZED METAL COMPOUNDS CONTAINED THEREIN BY BRINGING THE Epsilon -CAPROLACTAM MATERIAL INTO CONTACT WITH AN AQUEOUS SOLUTION CONTAINING 15 TO 75 PERCENT BY WEIGHT OF AT LEAST ONE ALKALI METAL PHOSPHATE TO EXTRACT THE IMPURITY COMPOUND FROM THE Epsilon -CAPROLACTAM MATERIAL INTO THE PHOSPHATE AQUEOUS SOLUTION AND, THEREAFTER, SEPARATING THE Epsilon -CAPROLACTAM MATERIAL FROM THE PHOSPHATE AQUEOUS SOLUTION BY WAY OF SETTLING OR CENTRIFUGING THE MIXTURE.

Abstract translation: ε-CABROLACTAM材料如EPS-CABROLACTAM的单体，低聚物和聚合物以及这些化合物的混合物，通过使ε-CABROLACTAM材料与含有AQUEOUS溶液接触的方式从包含在其中的酸性化合物和非离子化的金属化合物等净化化合物中纯化。 以至少一种碱金属磷酸盐的重量计为15至75％，以将来自ε-磷酸铵材料的重量化合物从磷酸盐水溶液中萃取，并且通过沉降或离心方式从磷酸盐水溶液中分离出ε-吡咯烷酮材料 混合物。

公开(公告)号：US3855080A

公开(公告)日：1974-12-17

申请号：US26945672

申请日：1972-07-06

Applicant: BASF AG

Inventor： BECKER L ,  KAHR K ,  RAPP G ,  WASCHKA O

IPC: C07D201/16 ,  B01D1/22 ,  C07D41/06

CPC classification number: C07D201/16

Abstract: Caprolactam is recovered from a mixture which contains caprolactam and oligomers of the same by distillation at temperatures above the melting point of the oligomers or mixture thereof contained in the residue at atmospheric or slightly increased pressure. The process is of importance for removing residues of caprolactam oligomer residues and thus for effluent pollution control.

Abstract translation: 通过在高于大气压或稍微增加的压力下残留物中的低聚物或其混合物的熔点的温度下蒸馏，从含有己内酰胺及其低聚物的混合物中回收己内酰胺。 该过程对于去除己内酰胺低聚物残留物的残留物以及用于污水污染控制是重要的。

公开(公告)号：US3839324A

公开(公告)日：1974-10-01

申请号：US20556671

申请日：1971-12-07

Applicant: INVENTA AG

Inventor： SCHULTZE H ,  HENN R ,  BERTHER C

IPC: C07D201/16 ,  C07D41/06

CPC classification number: C07D201/16

Abstract: A continuous process for the purification of caprolactam characterized in that raw caprolactam is subjected to a solvent distillation followed by a distillation under reduced pressure in the presence of sodium hydroxide and then to a melt crystallization, in which: A. The residue from the alkaline distillation is taken up in water, the aqueous solution extracted with benzene or toluene and the lactam solution fed to the main product stream through the solvent distillation; B. The residue from the melt crystallization is extracted in the crystalline state with an aliphatic or cycloaliphatic hydrocarbon with 5-10 carbon atoms and the purified residue is fed back into the alkaline distillation of the main produce stream; and C. The aliphatic or cycloaliphatic hydrocarbon is regenerated and used again for the extraction of the residue from the meltcrystallization.

Abstract translation: 用于纯化己内酰胺的连续方法，其特征在于将原己内酰胺进行溶剂蒸馏，然后在氢氧化钠存在下减压蒸馏，然后进行熔融结晶，其中：

公开(公告)号：US3792045A

公开(公告)日：1974-02-12

申请号：US3792045D

申请日：1971-12-22

Applicant: INVENTA AG

Inventor： HENN R ,  DEITERS D ,  SCHULTZE H ,  BERTHER C

IPC: C07D201/16 ,  C07D41/06

CPC classification number: C07D201/16

Abstract: A PROCESS CHARACTERIZED IN THAT RAW CAPROLACTAM IS SUBJECTED, IN EITHER SEQUENCE, TO A CRYSTAL EXTRACTION WITH AN ALIPHATIC OR CYCLOALIPHATIC HYDROCARBON HAVING 5-10 CARBON ATOMS AND TO DISTILLATION UNDER REDUCED PRESSURE.

公开(公告)号：US3686077A

公开(公告)日：1972-08-22

申请号：US3686077D

申请日：1970-04-01

Applicant: STAMICARBON

Inventor： KONING HENDRIK DE

IPC: B01D1/06 ,  B01D1/10 ,  C07D201/16 ,  B01D3/04

CPC classification number: C07D201/16 ,  B01D1/06 ,  B01D1/10 ,  Y10S159/10

Abstract: A PROCESS FOR THE SEPARATION OF LOWER BOILING POINT LIQUIDS FROM THOSE OF A HIGH BOILING POINT, AND APPARATUS THEREFOR IS DISCLOSED. THE LIQUID MIXTURE IS SUPPLIED TO THE BASE OF THE EXTRACTOR AND PASSED UPWARDS UNDER CONTROLLED TEMPERATURE AND REDUCED PRESSURE IN THE VAPOR STATE THROUGH SEVERAL TUBES, WHOSE LENGTH IS FROM 15 TO 35 TIMES THEIR DIAMETER; THE VAPOR LEAVES THE TUBES AT A

VELOCITY APPROACHING THE VELOCITY OF SOUND IN THE VAPOR, AND IS SUBSEQUENTLY CONDENSED. THE LOWER BOILING LIQUID THUS RECOVERED IS OF HIGH PURITY, OFTEN REPRESENTING UP TO 90% OF THE TOTAL LOWER BOILING FRACTION OF THE MIXTURE ENTERING THE EVAPORATOR.

公开(公告)号：US3684797A

公开(公告)日：1972-08-15

申请号：US3684797D

申请日：1970-07-08

Applicant: STAMICARBON

Inventor： GARRITSEN JOHAN W ,  CLASSENS JOHANNES E L

IPC: B01D9/02 ,  C07D201/16 ,  C07D41/06

CPC classification number: C07D201/16

Abstract: Laurolactam is purified by crystallization from solution in a solvent mixture of acetonitrile and water. The water content of the solvent mixture does not exceed 45 percent. Laurolactams thus purified are useful in the preparation of polyamides.

Abstract translation: 在乙腈和水的溶剂混合物中从溶液中结晶来纯化月桂内酰胺。 溶剂混合物的水分含量不超过45％。 如此纯化的月桂内酰胺可用于制备聚酰胺。

公开(公告)号：US3658659A

公开(公告)日：1972-04-25

申请号：US3658659D

申请日：1969-09-24

Applicant: PHILLIPS PETROLEUM CO

Inventor： COTTLE JOHN E

IPC: C07C17/38 ,  C07D201/16 ,  C07D207/26 ,  C07D207/267 ,  B01D3/38

CPC classification number: C07D207/267 ,  C07C17/38 ,  C07D201/16

Abstract: A process for the recovery of p-dichlorobenzene and Nmethylpyrrolidone from the reactor effluent from the production of polyphenylene sulfide from which the polyphenylene sulfide has been separated involving a steam distillation step to recover the p-dichlorobenzene and a fractionation step to recover the Nmethylpyrrodone.

Abstract translation: 从生产聚苯硫醚的反应器流出物中回收对二氯苯和N-甲基吡咯烷酮的方法，其中通过蒸汽蒸馏步骤分离聚苯硫醚以回收对二氯苯和分馏步骤以回收N 甲基吡咯烷酮。

公开(公告)号：US3651166A

公开(公告)日：1972-03-21

申请号：US3651166D

申请日：1968-04-29

Applicant: MARATHON OIL CO

Inventor： HALL DAVID W

IPC: C07C1/00 ,  C07C11/18 ,  C07D201/16 ,  C07C1/20

CPC classification number: C07D201/16 ,  C07C1/00 ,  C07C11/18

Abstract: RECOVERING ACIDS AND ORGANIC BASES FROM THEIR SALTS BY HEATING THE SALT TO ITS DISSOCIATION TEMPERATURE AND REMOVING THEREFROM THE ACID OR BASE WHEREIN THE SALT DISSOCIATES AT A TEMPERATURE LOWER THAN THE DECOMPOSITION TEMPERATURES OF THE ACID AND BASE; THE ACID AND BASE HAVE DIFFERENT VOLATILITIES AND THE SALT HAS A SUBLIMATION TEMPERATURE HIGHER THAN THE DISSOCIATION TMPERATURE THEREOF.

公开(公告)号：US3402047A

公开(公告)日：1968-09-17

申请号：US38960164

申请日：1964-08-14

Applicant: PHILLIPS PETROLEUM CO

Inventor： SHAUL DUANE D

IPC: A23C1/06 ,  A23F3/24 ,  A23F5/30 ,  A23L2/12 ,  B01D9/00 ,  C07D201/16 ,  C12G3/14

CPC classification number: C07C45/81 ,  A23C1/06 ,  A23F3/24 ,  A23F5/30 ,  A23L2/12 ,  B01D9/0013 ,  B01D9/004 ,  B01D9/005 ,  B01D9/0059 ,  C07D201/16 ,  C12G3/105

Abstract: 1,105,489. Concentrating liquids by freezing. PHILLIPS PETROLEUM CO. 2 Aug., 1965 [14 Aug., 1964], No. 33015/65. Heading F4H. In a process for separating the components of a liquid mixture by freezing, the crystal/ mother-liquor slurry from a freezer 2 is passed to a separator 16 from which the motherliquor is withdrawn at 9, the crystals are passed to a mixing vessel 18 where they are re-slurried with un-processed liquid from line 13, the slurry is passed to a purification column 20, and the mother liquor is withdrawn from an intermediate filter section 24 of the column and recycled through line 17 to form part or all of the liquid supply 1 for the freezer. The column further includes a reflux portion 30 and a heater 32 for melting the crystals, the melt being withdrawn through line 23 to which a pulsating pressure is applied by means 36. The freezer 2 is of the jacketed type including a scraper 8 but may be replaced by a direct contact heat exchanger. Liquids which may be treated in the process are sea-water, caprolactam, hydrocarbon mixtures such as para and meta-xylene and combinations of benzene n-heptane, carbon tetrachloride, ethyl alcohol, cyclohexane, methyl cyclohexane, toluene, chloroform, acetone and ethyl benzene, and food products such as grape, orange, lemon, pineapple, apple and tomato juices, vegetable juices, milk, beer, wine, coffee and tea. A quantitative example of the process as applied to the concentration of beer is given.