6 results about "Xylenol" patented technology

The invention discloses a phenol separation coupling catalysis purification method, and relates to the technical field of fine chemical separation and purification. According to the method, a metal oxide modified H-ZSM-5 molecular sieve is used as a catalyst, a coupling reaction and a separation process are carried out in a catalytic rectifying tower, and two core processes are synchronously completed: 1, impurities such as phenol and o-cresol in raw materials are subjected to a targeted O-alkylation reaction with methanol, and the impurities difficult to separate are efficiently converted into an alkylate easy to rectify; and 2, precise fractionation is synchronously realized, heavy ether products are extracted and removed from a side line, and target products mainly comprising high-purity 2, 6-xylenol and 2, 4-xylenol are obtained in a tower kettle. Through integrated design of targeted conversion and synchronous separation, key impurities are removed with high selectivity, the process is simplified, equipment investment and energy consumption are reduced, non-target side reactions are avoided, and high selectivity, high yield, process economy and product quality of target xylenol are considered.

The invention belongs to the field of organic synthesis, and particularly relates to a catalyst, a preparation method thereof and application of the catalyst in preparation of 2, 6-xylenol. The molar ratio of the iron element to the vanadium element to the platinum element in the catalyst is 100: (2-15): (0.05-0.5), and the preparation method of the catalyst is convenient and beneficial to industrial production. The catalyst provided by the invention has the characteristics of high conversion rate, high 2, 6-xylenol selectivity and high stability in a reaction for preparing 2, 6-xylenol and co-producing o-cresol through phenol methylation, the phenol conversion rate can reach 95% or above, and the 2, 6-xylenol selectivity can reach 90% or above.

Provided are antimicrobial compositions containing a potentiated halogen substituted xylenol, especially para-chloro-meta-xylenol (PMCX). In particular, a quaternary ammonium compound was found to dramatically improve the efficacy of the halogen containing xylenol against various microorganisms.

This invention discloses a flotation separation method for collecting galena and inhibiting sphalerite and pyrite, achieving efficient separation of galena from sphalerite and pyrite in a low-alkaline pulp environment, belonging to the field of mineral beneficiation technology. This invention uses N-hydroxyethylethylenediaminetriacetic acid as an inhibitor of sphalerite and pyrite at a low alkalinity of pH 7.5-9.5, and one or two of sodium diethyldithiocarbamate, sodium ethyl xanthate, and xylenol dithiophosphate as collectors for galena. Under low dosage conditions, it achieves simultaneous inhibition of sphalerite and pyrite and effective collection of galena, offering advantages of high efficiency, simple process, economy, and environmental friendliness. It is particularly suitable for silver-bearing, high-sulfur, low-grade lead-zinc ores and has broad application prospects.

This invention belongs to the technical field of organic synthesis and separation, specifically relating to a method for synthesizing phenolic resin from 2,4-xylenol / 2,5-xylenol. The method provided by this invention utilizes the difference in reactivity between 2,5-xylenol, 2,4-xylenol, and aldehydes, using a portion of the inexpensive 2,4 / 2,5-xylenol to replace phenol in the production of phenolic resin. Simultaneously, it produces 99% 2,4-xylenol and p-cresol, etc. Since the prices of 2,4-xylenol and p-cresol are significantly higher than those of 2,4 / 2,5-xylenol, this method also offers good economic benefits and expands the application scope and market size of 2,4 / 2,5-xylenol.

Applicants have developed novel methods and compositions for treating, preventing or ameliorating the effects plant phytopathogen infestation in plants, including of Candidatus Liberibacter spp. the causal agents of citrus greening and potato zebrachip disease. Novel compositions include one or more active agents of aminocaproic acid, carbinoxamine maleate, chloroxylenol, chlorpropamide, cinoxacin, duartin, and cyclopentolate hydrochloride as well as their derivatives, or salt / acid forms thereof. Methods of preventing disease development and infestation by plant pathogens are disclosed as well as methods of making, using and producing such compositions.