How to Make Wines

Campden Fruit-Preserving Tablets

The sulphiting method is used by the trade, so we shall be following a method well tried and proved.

By the sulphiting method you can make hundreds of gallons of wines with the same unfailing success.
There is record i found here
United States Patent 4102911.
Sulfonating or sulfating method, Abstract:
A method for reacting sulfur trioxide and sulfateable or sulfonateable liquid organic compounds such as alcohols, and unsaturated or aromatic compounds is disclosed which comprises contacting said organic liquid with a gaseous mixture of from 2 to 20% by volume of sulfur trioxide and the balance an inert gas diluent, in a vertical cylindrical reaction zone that is at least about 25 mm. in diameter and comprises a straight cylinder having a gas-liquid contact length of at least 1.5 meters and having an annular inlet means for the liquid at the lower end of the reaction zone; the contact being effected by means of an upward stream of the gaseous mixture having sufficient velocity to form the liquid into a rising annular film throughout the length of the zone.
Another Patent;

United States Patent 5077060
Method of inducing the decarboxylation of malic acid in must or fruit juice, Abstract:
In a method of inducing decarboxylation of malic acid in must or fruit juice (also known as maloactic fermentation), must or fruit juice is directly inoculated with a culture of viable malolatic bacteria of the genus Lactobacillus, the bacteria being capable of decarboxylating malic acid at a pH below about 3.2 without any significant consumption of sugar present in the must or fruit juice and substantially without any production of volatile acidity. The malolactic bacteria may be added before or at the commencement of alcoholic fermentation. One malolatic strain suitable in the method is Lactobacillus plantarum DSM 4361.