The author has summarily described the main industrial production method and technical subject matters, analyzed the technical progress of high quality non soluble sulphur product produced inland and in foreign countries and the existing problems.
The industrial production method and application of chlorosulfoxide was introduced, as well as the production & sale status and market prospective of it was analyzed. Some development suggestions has been put forward.
The process for the liquid oxidization of 3-hydroxybutyraldehyde to synthesize 3-hydroxybutyric acid was mainly studied and developed in order to seek the industrial production method of biodegradable polymer PHB. In this process, 3-hydroxybutyraldehyde was prepared through the aldol condensation of acetaldehyde.
Industrial production method including microbial conversion, enzyme productio n and fermentation are particularized. To some extent, it may give some help to the study on the L- tryptophan.
We have established a new industrial production method of maleimides based on a reaction model which was revealed by analyzing the reactions occurring in the dehydration of maleamic acid.
It is the only industrial production method for some of these products and some are produced in very significant quantities.
例句来源
This paper stated the reaction mechanism of phenol-formalde- hyde resin modified by xylene,introduced industrial production method of phenol-formaldehyde resin modified by xylene,and discussed the effect factor of product quality.
OBJECTIVE: To improve the synthetic process of chlorpheniramine. METHOD: Phasetransfer catalysis method and screened phasetransfer catalysts were used experimentally. RESULTS: An increase was noted in the yield after use of method modified other than industrial production method. CONCLUSION: Polyethylene glycol-400 was used as phasetransfer catalyst with advantages, including that polyethylene glycol 400 is suitable for industrial production.
The present situation, main problem and trend of development for V volvacea production are discussed.The natural resources, geographical distribution and cultural method for V volvacea in China are also introduced. Four viewpoints are discussed as followings:(ⅰ) keeping the total output, and paying more attention for the quality; (ⅱ)developing both the traditional method and industrial production method; (ⅲ)Opening up the market of V. volvacea ; (ⅳ)strengthe...