The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 4451671 B1

Date of Patent:

May. 29, 1984

Filed:

Aug. 30, 1982

butylene

Applicant:

Inventors:

Helmut Diery, Kelkheim, DE;

Norbert Wester, Hofheim am Taunus, DE;

Martin Hille, Liederbach, DE;

Assignee:

Hoechst Aktiengesellschaft, , DE;

Attorney:

Connolly and Hutz

Primary Examiner:

James H Reamer

Int. Cl.

CPC ...

C07C / ;

U.S. Cl.

CPC ...

564286 ; 564290 ; 252392 ; 252398 ; 252357 ;

Abstract

Thus, the invention relates to compounds of the formula I ##STR1## where R is aromatic, preferably phenylene, R.sub.1 and R.sub.2 denote C.sub.1 -C.sub.4 -alkyl, preferably C.sub.1 -C.sub.2 -alkyl, R.sub.3 denotes methyl or ethyl, x and z together denote a number from 2 to 360, preferably from 2 to 140, y denotes a number from 15 to 70, preferably 25 to 60, n denotes a number from 1 to 10 and A.sup.- denotes an anion, preferably chloride or bromide, a process for their preparation and their use as demulsifiers for demulsifying crude oil emulsions and as corrosion inhibitors in equipment for lifting and processing natural gas and crude oil.

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