	US 11,840,678 B2
	Mixture containing calixarenes, process for the production thereof and use thereof for preparing detergent compositions for lubricants
Marcello Notari, San Donato Milanese (IT); Giulio Assanelli, San Donato Milanese (IT); Alessandro Casnati, Parma (IT); Francesco Sansone, Parma (IT); and Andrea Magini, Camerino (IT)
Assigned to ENI S.P.A., Rome (IT)
Appl. No. 17/619,954
Filed by ENI S.P.A., Rome (IT)
PCT Filed Jun. 26, 2020, PCT No. PCT/IB2020/056083 § 371(c)(1), (2) Date Dec. 16, 2021, PCT Pub. No. WO2020/261217, PCT Pub. Date Dec. 30, 2020.
Claims priority of application No. 102019000010092 (IT), filed on Jun. 26, 2019.
Prior Publication US 2022/0298445 A1, Sep. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C10M 159/22 (2006.01); C10N 30/00 (2006.01); C10N 30/02 (2006.01); C10N 30/04 (2006.01); C10N 40/25 (2006.01)

CPC C10M 159/22 (2013.01) [C10M 2207/028 (2013.01); C10N 2030/02 (2013.01); C10N 2030/04 (2013.01); C10N 2030/52 (2020.05); C10N 2040/25 (2013.01)]

39 Claims

1. A mixture of compounds that comprises:

calixarenes not containing sulphur and soluble in lubricant base oil, having the following general formula (I):

wherein:

a. R is selected from a linear or branched alkyl having a number of carbon atoms ranging from 4 to 40;

b. n is the number of units of the calixarene cycle and is comprised in the range between 4 and 16;

a concentration of unreacted alkylphenol, expressed as a percentage by weight of the alkylphenol on the mixture of compounds, less than or equal to 2.0%, such alkylphenol having the general formula (II)

wherein R is as described for formula (I);

a concentration of linear oligomers, expressed as a percentage by weight of linear oligomers on the mixture of compounds, less than or equal to 20%; said linear oligomers having the general formula (III)

wherein R is as defined in formula (I), R₁and R₂hydrogen, or the hydroxymethylene group (—CH₂OH), and p is comprised between 0 and 6.