公开(公告)号：JPH11322696A

公开(公告)日：1999-11-24

申请号：JP33815698

申请日：1998-11-27

Applicant: STANDARD OIL CO OHIO

Inventor： GRAHAM ANNE M ,  GODBOLE SANJAY P ,  LEE DANIEL G

IPC: C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: PROBLEM TO BE SOLVED: To obtain a specific unsaturated mononitrile useful as a monomer for a polymerizing reaction without contamination with an impurity by reacting a specific olefin, ammonia, etc., in the presence of a catalyst, reducing the pH of an aqueous stream used till the recovery and purification before recycling and then reducing the amount of the trace impurity. SOLUTION: An olefin selected from propylene and isobutylene is reacted with ammonia and oxygen in the presence of a catalyst in a reactor zone. A reactor effluent containing the produced unsaturated mononitrile from the reactor is then brought into contact with at least a first aqueous stream in a quenching column and cooled. The cooled reactor effluent is subsequently brought into contact with at least a second aqueous stream in an absorption column to separate and remove a bottom stream containing the unsaturated mononitrile. The resultant bottom stream is then moved to a recovery and purification section and the pH of at least one aqueous process stream is reduced before recycling to thereby reduce the amount of a trace impurity. The resultant bottom stream is further recycled to afford the objective compound selected from acrylonitrile and methacrylonitrile.

公开(公告)号：BG102955A

公开(公告)日：2000-04-28

申请号：BG10295598

申请日：1998-11-26

Applicant: STANDARD OIL CO OHIO

Inventor： GRAHAM ANNE M ,  GODBOLE SANJAY P ,  LEE DANIEL G

IPC: C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: The invention relates to a method for the manufacturing of unsaturated mononitrile from the group of acrylonitrile and methacrylonitrile. It includes reaction of olefine from the group containing propylene or isobutylene and ammonia and oxygen in a reaction zone in the presence of a catalyst to produce a reactor effluent containing the corresponding unsaturated mononitrile. The effluent runs over a cooling column where, in order to cool, it gets into contact with at least first aqueous stream. The cooled reactor effluent containing the unsaturated mononitrile is transferred into an absorption column where it is contacted with at least a second aqueous stream to separate and remove the unsaturated mononitrile as a bottom stream from the absorption column. The bottom stream containing the unsaturated mononitrile is transferred to a recovery and purification section where the unsaturated mononitrile is recovered and purified. At least one aqueous process stream is recirculated for improving the efficiency of the process consisting in reducing the pH, thereby reducing the amount of trace impurities in the aqueous recirculation stream. 8 claims, 1 figure

公开(公告)号：ES2236874T3

公开(公告)日：2005-07-16

申请号：ES98309539

申请日：1998-11-23

Applicant: STANDARD OIL CO

Inventor： GODBOLE SANJAY P ,  GRAHAM ANNE M ,  LEE DANIEL G

IPC: C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08 ,  C07C253/32

Abstract: LA INVENCION SE REFIERE A UN PROCEDIMIENTO PARA LA FABRIACION DE UN MONONITRILO INSATURADO, SELECCIONADO A PARTIR DEL GRUPO FORMADO POR ACRILONITRILO Y METACRILONITRILO, QUE CONSISTE EN: HACER REACCIONAR UNA OLEFINA SELECCIONADA A PARTIR DEL GRUPO FORMADO POR PROPILENO E ISOPROPILENO, AMONIACO Y OXIGENO, EN UNA ZONA DE REACTOR, EN PRESENCIA DE UN CATALIZADOR, PARA PRODUCIR UN EFLUENTE DEL REACTOR FORMADO POR EN MONONITRILO INSATURADO CORRESPONDIENTE; TRANSFERIR EL EFLUENTE DEL REACTOR QUE CONTIENE EL MONONITRILO INSATURADO A UNA COLUMNA DE ENFRIAMIENTO RAPIDO EN LA QUE DICHO EFLUENTE SE PONE EN CONTACTO CON AL MENOS UNA PRIMERA CORRIENTE ACUOSA QUE ENFRIA DICHO EFLUENTE; TRANSFERIR EL EFLUENTE ENFRIADO A UNA COLUMNA DE ABSORCION, EN DONDE SE PONE EN CONTACTO CON AL MENOS UNA SEGUNDA CORRIENTE ACUOSA, PARA SEPARAR Y ELIMINAR EL MONONITRILO INSATURADO COMO CORRIENTE DE FONDO A PARTIR DE LA COLUMNA DE ABSORCION; TRANSFERIR DICHA CORRIENTE DE FONDO HASTA UNA SECCION DE RECUPERACION Y PURIFICACION, DONDE EL MONONITRILO INSATURADO SE RECUPERA Y PURIFICA; Y RECICLAR AL MENOS UNA CORRIENTE DE PROCESO ACUOSA PARA MEJORAR LA EFICIENCIA DEL PROCESO. LA MEJORA DEL PROCESO CONSISTE EN TRATAR AL MENOS UNA CORRIENTE ACUOSA ANTES DEL RECICLAJE EN LA CORRIENTE DEL PROCESO, PARA REDUCIR EL PH, REDUCIENDO POR TANTO LA CANTIDAD DE IMPUREZAS TRAZA PRESENTES EN LA CORRIENTE DE RECICLAJE ACUOSA.

公开(公告)号：CA1151138A

公开(公告)日：1983-08-02

申请号：CA360211

申请日：1980-09-12

Applicant: STANDARD OIL CO OHIO

Inventor： PESA FREDERICK A ,  GRAHAM ANNE M

IPC: C07D207/263 ,  B01J23/00 ,  B01J23/89 ,  C07B61/00 ,  C07D201/08 ,  C07D207/26 ,  C07D207/267 ,  C07D207/38 ,  C07D207/00

Abstract: Five-membered nitrogen-containing saturated heterocyclic compounds, e.g. pyrrolidone, can be prepared by the catalytic hydrogenation/amination or a five-membered heterocyclic anhydride or the corresponding acid. This reaction proceeds with high yields and selectivities when it is conducted in the presence of oxide complex catalysts containing ruthenium.

公开(公告)号：RO120405B1

公开(公告)日：2006-01-30

申请号：RO9801625

申请日：1998-11-26

Applicant: STANDARD OIL CO

Inventor： GRAHAM ANNE M ,  GODBOLE SANJAY P ,  LEE DANIEL G

IPC: C07C253/24 ,  C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: The invention relates to a process for preparing unsaturated mononitriles selected from a group consisting of acrylonitrile and methacrylonitrile and comprising: a) the reaction of an olefin selected from a group consisting of propylene and isobutylene with ammonia and oxygen, in a reaction zone, in the presence of a catalyst, to produce an effluent of the reactor containing the corresponding unsaturated mononitrile; b) the transfer of the reactor effluent containing the corresponding unsaturated mononitrile to a blast cooling column where the reactor effluent containing the corresponding unsaturated mononitrile is cooled by contact with a first aqueous flow; c) the transfer of the cooled effluent from the reactor containing the unsaturated mononitrile to an absorption column where the cooled effluent from the reactor containing the unsaturated mononitrile is contacted to at least a second aqueous flow in order to separate and remove the unsaturated mononitrile as a flow from the bottom of the absorption column; d) the transfer of the flow from the bottom of the absorption column to a recovery column where the overhead product is removed and separated in a raw unsaturated mononitrile phase and an aqueous phase with a low content of unsaturated mononitrile, containing traces of oxidizing impurities and also the lowering of the aqueous phase pH value with a view to reducing the level of oxidative impurities and the recycling of the above mentioned aqueous phase.

公开(公告)号：AT287872T

公开(公告)日：2005-02-15

申请号：AT98309539

申请日：1998-11-23

Applicant: STANDARD OIL CO

Inventor： GODBOLE SANJAY P ,  GRAHAM ANNE M ,  LEE DANIEL G

IPC: C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08 ,  C07C253/32

Abstract: A process for manufacturing an unsaturated mononitrile selected from the group consisting of acrylonitrile and methacrylonitrile comprising reacting an olefin selected from the group consisting of propylene and isobutylene, ammonia and oxygen in a reactor zone in the presence of a catalyst to produce a reactor effluent containing the corresponding unsaturated mononitrile, transferring the reactor effluent containing the unsaturated mononitrile to a quench column wherein the reactor effluent containing the unsaturated mononitrile is contacted with at least a first aqueous stream to cool the reactor effluent, transferring the cooled reactor effluent containing the unsaturated mononitrile to an absorption column wherein the reactor effluent containing unsaturated mononitrile is contacted with at least a second aqueous stream to separate and remove the unsaturated mononitrile as a bottom stream from the absorption column, transferring the bottom stream containing the unsaturated mononitrile to a recovery and purification section where the unsaturated mononitrile is recovered and purified, and recycling at least one aqueous process stream to improve the efficiency of the process wherein the improvement comprises treating at least one aqueous stream before recycling into the process stream to reduce the pH thereby reducing the amount of trace impurities present in the aqueous recycle stream.

公开(公告)号：TR199802494A2

公开(公告)日：1999-12-21

申请号：TR9802494

申请日：1998-11-30

Applicant: STANDARD OIL CO

Inventor： GRAHAM ANNE M ,  GODBOLE SANJAY P ,  LEE DANIEL G

IPC: C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: A process for manufacturing an unsaturated mononitrile selected from the group consisting of acrylonitrile and methacrylonitrile comprising reacting an olefin selected from the group consisting of propylene and isobutylene, ammonia and oxygen in a reactor zone in the presence of a catalyst to produce a reactor effluent containing the corresponding unsaturated mononitrile, transferring the reactor effluent containing the unsaturated mononitrile to a quench column wherein the reactor effluent containing the unsaturated mononitrile is contacted with at least a first aqueous stream to cool the reactor effluent, transferring the cooled reactor effluent containing the unsaturated mononitrile to an absorption column wherein the reactor effluent containing unsaturated mononitrile is contacted with at least a second aqueous stream to separate and remove the unsaturated mononitrile as a bottom stream from the absorption column, transferring the bottom stream containing the unsaturated mononitrile to a recovery and purification section where the unsaturated mononitrile is recovered and purified, and recycling at least one aqueous process stream to improve the efficiency of the process wherein the improvement comprises treating at least one aqueous stream before recycling into the process stream to reduce the pH thereby reducing the amount of trace impurities present in the aqueous recycle stream.

公开(公告)号：BR9805434A

公开(公告)日：1999-12-14

申请号：BR9805434

申请日：1998-11-26

Applicant: STANDARD OIL CO OHIO

Inventor： GRAHAM ANNE M ,  GODBOLE SANJAY P ,  LEE DANIEL G

IPC: C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08

Abstract: A process for manufacturing an unsaturated mononitrile selected from the group consisting of acrylonitrile and methacrylonitrile comprising reacting an olefin selected from the group consisting of propylene and isobutylene, ammonia and oxygen in a reactor zone in the presence of a catalyst to produce a reactor effluent containing the corresponding unsaturated mononitrile, transferring the reactor effluent containing the unsaturated mononitrile to a quench column wherein the reactor effluent containing the unsaturated mononitrile is contacted with at least a first aqueous stream to cool the reactor effluent, transferring the cooled reactor effluent containing the unsaturated mononitrile to an absorption column wherein the reactor effluent containing unsaturated mononitrile is contacted with at least a second aqueous stream to separate and remove the unsaturated mononitrile as a bottom stream from the absorption column, transferring the bottom stream containing the unsaturated mononitrile to a recovery and purification section where the unsaturated mononitrile is recovered and purified, and recycling at least one aqueous process stream to improve the efficiency of the process wherein the improvement comprises treating at least one aqueous stream before recycling into the process stream to reduce the pH thereby reducing the amount of trace impurities present in the aqueous recycle stream.

公开(公告)号：TR9802494A2

公开(公告)日：1999-12-21

申请号：TR9802494

申请日：1998-11-30

Applicant: STANDARD OIL CO

Inventor： GRAHAM ANNE M ,  GODBOLE SANJAY P ,  LEE DANIEL G

IPC: C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08

CPC classification number: C07C253/26 ,  C07C255/08

公开(公告)号：ZA9810259B

公开(公告)日：1999-05-18

申请号：ZA9810259

申请日：1998-11-10

Applicant: STANDARD OIL CO OHIO

Inventor： GRAHAM ANNE M ,  GODBOLE SANJAY P ,  LEE DANIEL G

IPC: C07C5/08 ,  C07C253/26 ,  C07C253/34 ,  C07C255/08 ,  C07C

Abstract: A process for manufacturing an unsaturated mononitrile selected from the group consisting of acrylonitrile and methacrylonitrile comprising reacting an olefin selected from the group consisting of propylene and isobutylene, ammonia and oxygen in a reactor zone in the presence of a catalyst to produce a reactor effluent containing the corresponding unsaturated mononitrile, transferring the reactor effluent containing the unsaturated mononitrile to a quench column wherein the reactor effluent containing the unsaturated mononitrile is contacted with at least a first aqueous stream to cool the reactor effluent, transferring the cooled reactor effluent containing the unsaturated mononitrile to an absorption column wherein the reactor effluent containing unsaturated mononitrile is contacted with at least a second aqueous stream to separate and remove the unsaturated mononitrile as a bottom stream from the absorption column, transferring the bottom stream containing the unsaturated mononitrile to a recovery and purification section where the unsaturated mononitrile is recovered and purified, and recycling at least one aqueous process stream to improve the efficiency of the process wherein the improvement comprises treating at least one aqueous stream before recycling into the process stream to reduce the pH thereby reducing the amount of trace impurities present in the aqueous recycle stream.