Does not react directly with sodium bisulfite

The development of sulphitational fatliquor application The development of sulfitation technology of king note The reaction of introducing a group into the rouge molecule is called sulphitation or sulphation reaction. Sulfiting refers to a reaction in which a sulfur atom is bonded to a carbon atom. The resulting product is a sulphinic acid compound sulphonic acid compound. Sulphation in a household is a reaction in which a sulfur atom is linked to an oxygen atom, and the resulting product is sulphate vinegar. The sulphated fatliquor emulsion has good acid and salt resistance and excellent fatliquoring effect. It has been the focus of attention. There are three methods for the sulfitation of oils and fats. The grease molecules react directly with the reaction oxidative sulfitation, that is, the grease first oxidizes, and then The role of sodium bisulfite and other oil molecules in the introduction of maleic acid molecules, and then with the role of sodium bisulfite The first method has not been used to prepare sulphitation fatliquors due to severe reaction, large pollution and other reasons. Today's sulfited fatliquors are produced using the latter two methods. Domestically, research on the sulfitation of fish oils began in the beginning of the year, and the production of sulfited fish oil fatliquors was started. This can be referred to as indirect sulfitation. The principle of sulfitation reaction is imported raw Peruvian refined fish oil, using the same process as in Germany, that is, air oxidation and sulfitation process simultaneously. The iodine value of fish oil in China is generally within the scope of the principle of sulfitation reaction in the acetic acid saponification process, and the process route of simultaneous air oxidation and sulphitation is simply copied. To this end, China has developed a method for the sulfitation of fish oils with low iodine value, that is, adopting a stepwise process route of oxidation and sulfitation, using catalysts or oxidants to enhance the degree of oxidation reaction, and then carrying out sulfitation reactions. .