2results about How to "Avoid high temperature and pressure" patented technology

The invention belongs to the field of textile, and relates to a linen fiber refined processing technology, which comprises the following steps: beating linen into linen, and carrying out impurity removal treatment on the linen by an impurity removal machine to remove impurities doped in the linen fiber and too short or broken fibers; after the quality of the flax raw material is improved, the flax is beaten into flax, the flax is preheated through a steam channel and then fed into a degumming tank to be soaked in a biological enzyme solution according to the bath ratio of 1: 15 for degumming treatment for 30-60 min, after degumming, the flax is cleaned through clean water added with a softener, and the cleaned flax fiber is subjected to dewatering, oiling and drying treatment; after dust removal treatment and anesthesia, opening treatment and secondary dust removal are carried out on the linen fibers through the opener, so that the use of acid and alkali reagents is completely avoided, the reaction time is shortened, the production cost and the environmental pollution degree are reduced, the environmental pollution problem caused by strong acid and strong alkali is avoided, and meanwhile, the excellent mechanical property is achieved.

This invention discloses a Co3O4 / CeO2 composite electrode, its preparation method, and an electrosynthesis method for epoxides. The Co3O4 / CeO2 composite electrode comprises carbon paper and a Co3O4 / CeO2 nanoneedle composite material supported on the carbon paper. This invention uses the Co3O4 / CeO2 nanoneedle composite material as the anodic electrocatalyst to prepare epoxides in a chloride-mediated aqueous solution system with olefins as substrates under low / room temperature and atmospheric pressure via anodic electrooxidation. The electrosynthesis method of this invention uses water as the sole oxygen source, eliminating the need for external peroxides, molecular oxygen, or other hazardous oxidants. The reaction conditions are mild, environmentally friendly, and energy-efficient, exhibiting both high activity and high stability. It is applicable to the electro-epoxidation reactions of various olefin substrates, solving problems such as severe oxygen evolution side reactions, poor catalyst stability, and difficulty in balancing activity and selectivity in existing technologies.