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.:
Date of Patent:
May. 21, 1985
Filed:
Feb. 03, 1984
Rudolf Pistorius, Hunstetten, DE;
Hoechst Aktiengesellschaft, Frankfurt, DE;
Abstract
Process for isolating paraffinsulfonate from the extracts obtained on sulfoxidating n-paraffins by first of all separating off the bulk of the paraffin by adding alcohol at about 5.degree.-55.degree. C., then adding an amount of alkali required for neutralization in such a way that pH 7 is not undershot, separating off the precipitated alkali metal sulfate, distilling the alcohol out of the remaining paraffinsulfonate solutions, and concentrating the aqueous solution of the paraffinsulfonate by continuously introducing it into an evaporator in which the temperature should never drop below 130.degree. C. from when the paraffinsulfonate solution is started to be introduced throughout the entire period for the evaporation of water.