Patent ID: 9587202
Date: 2017-03-07
CPC Classifications: B01D,C09K,C10M,C10N

Claim:
1. A process for limiting or controlling the increase in the total acid number in a refrigerating composition comprising at least one refrigerant and at least one lubricant, said process comprising a stage of bringing said refrigerating composition into contact with at least one zeolitic adsorbent, wherein the at least one zeolitic adsorbent is free of metal impregnation and the at least one zeolitic adsorbent is based on zeolite(s) A exchanged with potassium, the degree of exchange of which is between 50% and 70% (reported as molar equivalents) of all of the exchangeable cationic sites, wherein the at least one zeolitic adsorbent is present in an effective amount to limit or reduce the total acid number of the lubricant and the effective amount is about 40 mg to about 1000 mg per 5 g of lubricant.