Abstract:
This invention relates to a poly hydroxyl alkyl phosphine-organic silicon tanning agent, its preparation, and its application in fur tanning; the poly hydroxyl alkyl phosphine comprises organic silicon of molecular mass range 10,000-200,000, surface active agent, stabilizer and pure water; in the application of leather and fur tanning, the silicon tanning presents many advantages: it does not alter fur indumentum, the tanned fur has good dry/wet washing toleration, the leather does not de-tan, the tanning agent itself has low toxicity, no potential safety hazard, does not accumulate in the body of organism, and does not cause cancer, deform and genetic mutation.
Abstract:
This invention relates to a leather tanning process based on the recycling of poly hydroxyl alkyl phosphine and its derivatives comprising the preparation of the tanning initial liquid of tanning agent based on poly hydroxyl alkyl phosphine and its derivatives, the recycling of poly hydroxyl alkyl phosphine and its derivatives to the tanning process, and the adjustment of the residual liquid of tanning agent, pH, stabilizer and buffer agent, and the guarantee that the leather tanning quality is unchanged, as well as the repetition that allows unlimited use of the bath liquid without the discharge of waste water.