EP0903336A3

Weak acid process for producing dinitrotoluene

Abstract

This invention relates to an improved process for the production of dinitrotoluene wherein one is able to effectively employ a feed sulfuric acid, which is referred to as "weak acid" as the feed sulfuric acid for the nitration facility. The weak acid concentration, as feed, ranges from 86-91%, preferably 87-89% sulfuric acid by weight, to meet the total sulfuric acid requirements for the facility. This is accomplished by utilizing cocurrent processing in a mononitration zone and countercurrent nitration with respect to sulfuric acid in the dinitration zone.

EP0903336A3, drawing sheet 1 — Sheet 1 of 1

Term

Term ended

Projected expiry passed 15 September 2018, 8 years ago.

1 sheet

Sheet 1

Every citation, both ways

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
US2475095A	Cites	United States of America	DA	Search report	1-13
US3204000A	Cites	United States of America	DA	Search report	1-13
US3799993A	Cites	United States of America	A	Search report	1-13

15 members in 8 offices

This recordMember, by publication datePriority claim

Priority claims4

Priority claims
Document	Office	Kind	Date
933706	United States of America	–	1997-09-19
93370697	United States of America	A	1997-09-19
933706	–	–	–
US19970933706	–	–	–

Members15

Family members, oldest first
Document	Office	Kind
EP0903336A2	European Patent Office (EPO)	A2	1999-03-24
KR19990029828A	Republic of Korea	A	1999-04-26
US5902910A	United States of America	A	1999-05-11
CN1216760A	China	A	1999-05-19
BR9803446A	Brazil	A	1999-12-14
BR9803446A	Brazil	A	1999-12-14
KR100271538B1	Republic of Korea	B1	2000-11-15
EP0903336A3This record	European Patent Office (EPO)	A3	2001-04-25
EP0903336B1	European Patent Office (EPO)	B1	2003-05-21
DE69814776D1	Germany	D1	2003-06-26
PT903336E	Portugal	E	2003-09-30
ES2196446T3	Spain	T3	2003-12-16
DE69814776T2	Germany	T2	2004-02-05
CN1157362C	China	C	2004-07-14
BR9803446B1	Brazil	B1	2009-01-13

41 legal events, as 6 offices reported them to INPADOC

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Events

Legal events, newest first
	Event	Code	Office
2017-07-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2017-02-28	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2016-10-26	Announcement of lapse in spainLapsedFD2A	FD2A	ES
2016-08-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2016-07-29	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2016-07-29	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2016-07-01	Notification of lapseLapsedST	ST	FR
2016-05-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2016-05-25	Gb: european patent ceased through non-payment of renewal feeCeasedGBPC	GBPC	EP
2016-04-29	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2016-04-01	Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119	R119	DE
2016-03-22	Annulment/lapse due to non-payment of fees, searched and examined patentLapsedLAPSE DUE TO NON-PAYMENT OF FEESMM4A	MM4A	PT
2015-04-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2015-01-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2014-12-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2014-12-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2014-11-28	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2014-11-28	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2014-11-28	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2004-05-12	No opposition filedOpposition26N	26N	EP
2004-03-26	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
2004-03-26	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
2004-03-05	Fr: translation filedET	ET	EP
2003-12-16	Definitive protectionFG2A	FG2A	ES
2003-09-30	Translation is availableAVAILABILITY OF NATIONAL TRANSLATIONSC4A	SC4A	PT
2003-06-26	Corresponds to:REF	REF	EP
2003-05-21	Designated contracting statesAK	AK	EP
2003-05-21	European patent grantedGrantedFG4D	FG4D	GB
2003-04-04	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
2003-03-28	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH	GRAH	EP
2002-11-13	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOS IGRAGRAH	GRAH	EP
2002-05-15	First examination report despatched17Q	17Q	EP
2002-01-30	Designated contracting states (corrected)RBV	RBV	EP
2002-01-16	Designation fees paidAT BE CH CY DE DK ES LIAKX	AKX	EP
2001-08-16	Request for examination filed17P	17P	EP
2001-04-25	Designated contracting statesAK	AK	EP
2001-04-25	Request for extension of the european patentAL;LT;LV;MK;RO;SIAX	AX	EP
2001-03-09	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
1999-03-24	Designated contracting statesAK	AK	EP
1999-03-24	Request for extension of the european patentAL;LT;LV;MK;RO;SIAX	AX	EP
1999-02-05	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Weak acid process for producing dinitrotoluene

Abstract

Term

Priority claims4

Members15

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Events

Numbers

Titles3

Classification

Designated states25