JPS54128589A - Recovery of epsilon-caprolactam - Google Patents

Recovery of epsilon-caprolactam

Info

Publication number
JPS54128589A
JPS54128589A JP3619878A JP3619878A JPS54128589A JP S54128589 A JPS54128589 A JP S54128589A JP 3619878 A JP3619878 A JP 3619878A JP 3619878 A JP3619878 A JP 3619878A JP S54128589 A JPS54128589 A JP S54128589A
Authority
JP
Japan
Prior art keywords
aqueous
caprolactam
epsilon
stage
phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3619878A
Other languages
Japanese (ja)
Other versions
JPS6026103B2 (en
Inventor
Kanji Shono
Mitsuaki Shiragami
Takashi Hironaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Priority to JP53036198A priority Critical patent/JPS6026103B2/en
Publication of JPS54128589A publication Critical patent/JPS54128589A/en
Publication of JPS6026103B2 publication Critical patent/JPS6026103B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Other In-Based Heterocyclic Compounds (AREA)

Abstract

PURPOSE:To recover epsilon-caprolactam and ammonium sulfate of high purity in high yield, by separating a neutralization mixture after the Beckmann rearrangement of cyclohexanone oxime into an aqueous and an oil phases, and by extracting the phases with specific solvents. CONSTITUTION:Cyclohexanone oxime is subjected to the Beckmann rearrangement in the presence of sulfuric acid, and neutralized with aqueous ammonia to give a mixture, which is separated into an aqueous and oil phases in the first stage. In the second stage, the aqueous phase is extracted with an organic solvent e.g. benzene or toluene, to transfer organic substances, e.g. epsilon-caprolactam, from the aqueous to the solvent phase. An aqueous ammonium sulfate is thus recovered. The oil phase spearated in the first stage is extracted with the same organic solvent to give a solvent phase containing epsilon-caprolactam, which is distilled to recover the epsilon-caprolactam. Extraction is carried out by countercurrent method, using a perforated plate tower.
JP53036198A 1978-03-29 1978-03-29 Method for recovering ε-caprolactam and ammonium sulfate Expired JPS6026103B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53036198A JPS6026103B2 (en) 1978-03-29 1978-03-29 Method for recovering ε-caprolactam and ammonium sulfate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53036198A JPS6026103B2 (en) 1978-03-29 1978-03-29 Method for recovering ε-caprolactam and ammonium sulfate

Publications (2)

Publication Number Publication Date
JPS54128589A true JPS54128589A (en) 1979-10-05
JPS6026103B2 JPS6026103B2 (en) 1985-06-21

Family

ID=12463024

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53036198A Expired JPS6026103B2 (en) 1978-03-29 1978-03-29 Method for recovering ε-caprolactam and ammonium sulfate

Country Status (1)

Country Link
JP (1) JPS6026103B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997030028A3 (en) * 1996-02-17 1997-09-25 Dsm Nv Recovery of epsilon-caprolactam from aqueous mixtures
EP0826665A1 (en) * 1996-09-02 1998-03-04 Dsm N.V. Recovery of epsilon-caprolactam from aqueous mixtures
CN103864689A (en) * 2012-12-07 2014-06-18 帝斯曼知识产权资产管理有限公司 Method for preparing caprolactam
WO2014206862A1 (en) * 2013-06-28 2014-12-31 Dsm Ip Assets B.V. Continuous process for recovery of solvent from gases exhausting from an ammonium sulfate production process
EP3862321A1 (en) * 2020-02-07 2021-08-11 Cap Iii B.V. Ammonium sulphate production on industrial scale

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
CAPROLATAM SUPPLEMENT A=1968US *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997030028A3 (en) * 1996-02-17 1997-09-25 Dsm Nv Recovery of epsilon-caprolactam from aqueous mixtures
EP0826665A1 (en) * 1996-09-02 1998-03-04 Dsm N.V. Recovery of epsilon-caprolactam from aqueous mixtures
CN103864689A (en) * 2012-12-07 2014-06-18 帝斯曼知识产权资产管理有限公司 Method for preparing caprolactam
WO2014206862A1 (en) * 2013-06-28 2014-12-31 Dsm Ip Assets B.V. Continuous process for recovery of solvent from gases exhausting from an ammonium sulfate production process
EP3862321A1 (en) * 2020-02-07 2021-08-11 Cap Iii B.V. Ammonium sulphate production on industrial scale
WO2021156371A1 (en) * 2020-02-07 2021-08-12 Cap Iii B.V. Ammonium sulphate production on industrial scale

Also Published As

Publication number Publication date
JPS6026103B2 (en) 1985-06-21

Similar Documents

Publication Publication Date Title
CA2467001A1 (en) Extraction process for removal of impurities from mother liquor in the synthesis of carboxylic acid
NZ217968A (en) Recovery of sulphuric acid from acid hydrolysis of biomass
GB1179630A (en) Process for Separating Crude Unsaturated Nitriles
MY113810A (en) Process for the recovery of caprolactam from waste containing nylon
GB996322A (en) Simultaneous recovery of pure ammonium sulphate and pure lactams from rearrangement mixtures of alicyclic ketoximes
JPS54128589A (en) Recovery of epsilon-caprolactam
US4036830A (en) Process for the recovery of pure ε-caprolactam from an aqueous solution thereof
GB1088812A (en) Continuous production of laurolactam in the liquid phase
ES444128A1 (en) Process for the preparation of aromatic polyamines
BR0012640B1 (en) process for the separation and purification of an aqueous mixture consisting of the major components acetic acid and formic acid.
ES2013955A6 (en) Process for the production of anhydrous oxime from an aqueous solution.
GB1508942A (en) Process for producing lactams
GB1271596A (en) Process for the extraction of aromatic hydrocarbons from mixtures of aromatic and aliphatic hydrocarbons
US20090312542A1 (en) System and method for recovering caprolactam from rearrangement mixtures
MY139965A (en) Continuous process for preparing caprolactam
EP0055921A3 (en) Ammonium sulfate recovery process
GB1397289A (en) Process for the recovery of lactam
HUT64007A (en) Process for obtaining sennoside a, b and a1
GB1343652A (en) Process for separating aromatic hydrocarbons
FR2614887B1 (en) LIQUID-LIQUID EXTRACTION GALLIUM RECOVERY PROCESS
JPS5621626A (en) Recovery of volatile organic substance
GB1123732A (en) Preparation of ªÏ-laurinolactam
JPS56100758A (en) Preparation of caprolactam
GB1158998A (en) Process for the Recovery of Ammonium Sulfate from Aqueous Ammonium Sulfate Solutions Containing Organic Components.
GB1462740A (en) Process for the recovery of epsilon-caprolactam from reaction mixture of epsilon-caprolactam and sulphuric acid

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20041130

RD02 Notification of acceptance of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7422

Effective date: 20060214

RD05 Notification of revocation of power of attorney

Effective date: 20060627

Free format text: JAPANESE INTERMEDIATE CODE: A7425

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20061031

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20061024

A521 Written amendment

Effective date: 20070129

Free format text: JAPANESE INTERMEDIATE CODE: A523

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Effective date: 20070320

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070413

R150 Certificate of patent (=grant) or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100427

Year of fee payment: 3

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 4

Free format text: PAYMENT UNTIL: 20110427

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120427

Year of fee payment: 5

FPAY Renewal fee payment (prs date is renewal date of database)

Year of fee payment: 5

Free format text: PAYMENT UNTIL: 20120427

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130427

Year of fee payment: 6

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130427

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (prs date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140427

Year of fee payment: 7

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R360 Written notification for declining of transfer of rights

Free format text: JAPANESE INTERMEDIATE CODE: R360

R371 Transfer withdrawn

Free format text: JAPANESE INTERMEDIATE CODE: R371

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250