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87 results about "Pinacolone" patented technology

Pinacolone (3,3-dimethyl-2-butanone) is an important ketone in organic chemistry. It is a colorless liquid and has a slight peppermint- or camphor- odor. It is a precursor to triazolylpinacolone in the synthesis of the fungicide triadimefon and in synthesis of the herbicide metribuzin. The molecule is an unsymmetrical ketone. The α-methyl group can participate in condensation reactions. The carbonyl group can undergo the usual reactions (hydrogenation, reductive amination, etc.). It is a Schedule 3 compound under the Chemical Weapons Convention 1993, due to being related to pinacolyl alcohol, which is used in the production of soman. It is also a controlled export in Australia Group member states.

Method for preparing aryl ketone

The invention relates to the field of catalysis, in particular to a method for preparing aryl ketone through reacting aldehyde with aryl boric acid under the catalysis of a ruthenium catalyst. In the method, an organic phosphide is used as a ligand, potassium phosphate is used as alkali, pinacolone or acetone is used as an additive, toluene or / and water is (are) used as a solvent(s), aldehyde and aryl boric acid which are used as reaction substrates react at 95-100 DEG C for 10-24h in the presence of a ruthenium compound used as a catalyst to prepare aryl ketone, wherein the catalyst is one of [Ru(cymene)Cl2]2, [Ru(CO)3Cl2]2, RuH2(CO)PPh3, Ru2(OAc)4, [Ru(benzene)Cl2]2, Ru(S-BINAP)Cl2 or Ru3(CO)12. In the invention, the used catalyst has relatively low price and low toxicity, thereby reducing the preparation cost and being more environmentally friendly.
Owner:铜陵市官作文化有限公司

Method of preparing chloropinacolone by gas-phase photocatalysis chlorination and special device thereof

The invention relates to a preparation method of chloropinacolone and a special device thereof. The method comprises the following steps: pinacolone is adopted as a raw material inside a chlorination reaction device and has chlorination reaction with the chlorination gas under the radiation of the light source to obtain the chloropinacolone, the chlorination reaction device comprises a reaction kettle with a heating device, a rectifying column which is arranged above an outlet of the reaction kettle, a gas-phase reactor which is arranged at a chlorination gas access inlet and a condenser, and also comprises a gas-liquid separator and a backflow liquid sealing pipe; and in the reaction kettle, the rectifying raw material gas and the chlorination gas or the chlorination mixed gas are undertaken the gas-phase photocatalysis chlorination reaction inside a gas-phase reactor from top to bottom to generate the chloropinacolone.The method is not only simple and easy, is easy to be industrialized, has low cost, less side product and high conversion rate and can prepare the chloropinacolone with high content, but also the special device for preparing the chloropinacolone is applicable to the industrialized production.
Owner:盐城七善化工科技有限公司

Anti-aging composition and preparation method thereof

The invention relates to the technical field of cosmetics, in particular to an anti-aging composition and a preparation method thereof. The anti-aging composition comprises the following raw materialsof an emulsifier, grease, a thickener, a humectant, an antioxidant, a preservative, functional active matter and water. The functional active matter is a composition of two or more of hydroxyl pinacolone retinoate, nicotinamide, crithmum maritimum stem cells and methylsilanol hydroxyproline aspartate. Through the cooperation of the functional active matter and the antioxidant, the anti-aging composition has the effects of whitening the skin, promoting collagen production, fading wrinkles and the like; moreover, the functional active matter can achieve the effects of fading the wrinkles on theepidermis and stimulating collagen production by the dermis from the skin surface layer, cuticle and dermis layer; through the functional active matter and the antioxidant, the anti-aging effect is remarkable; and therefore, the anti-aging composition has a good anti-aging effect and can meet the requirements of people on the anti-aging effect of the cosmetics. The preparation method has the characteristics of simple process, low production cost and suitability for industrial production.
Owner:东晟源研究院(广州)有限公司

Preparation process of pinacolone

The invention relates to a preparation process of pinacolone. The preparation process comprises steps as follows: (1) technical hydrochloric acid is cooled to subzero 5 DEG C to 5 DEG C, isopentene isslowly dropwise added under the stirring condition, the mixture is stirred for 1-3 h after isopentene is dropwise added, and 2-isoamyl chloride is produced; (2) 2-isoamyl chloride is pumped into a condensation reaction kettle, stirring is started, heating is performed slowly, formaldehyde is dropwise added when the temperature of a gas phase reaches 70-80 DEG C, the mixture is kept at the constant temperature for a reaction for 1-2 h after formaldehyde is dropwise added, cooling and still standing for layering are performed after the reaction ends, an upper-layer crude product enters a rectification device at the temperature of 70-80 DEG C for rectification, and a lower-layer acid liquid is pumped into a waste acid distillation kettle for fractionation; (3) rectified pinacolone is sent into a special azeotropic point distillation decoloration device and subjected to decoloration treatment at the temperature of 100-110 DEG C for 2-4 h, and a colorless pinacolone product with the purityhigher than or equal to 98% can be obtained. The preparation process has the advantages as follows: the colorless pinacolone product with the purity higher than or equal to 98% can be prepared.
Owner:南通鸿富达利化工有限公司

Process for regenerating pinacolone by absorption of pinacolone production tail gas by concentrated hydrochloric acid

The invention relates to a process for regenerating pinacolone by absorption of pinacolone production tail gas by concentrated hydrochloric acid. The process is characterized by comprising the following specific processes: S1, precooling and concentration increase of concentrated hydrochloric acid; S2, preparation of 2-isopentane chloride; S3, synthesis of pinacolone; S4, decoloring. The pinacolone product produced with the method has high purity, color and luster of the product are ensured, tail gas generated in production can be recycled for production of pinacolone, and green production istruly realized; besides, reaction time can be effectively shortened by precooling of concentrated hydrochloric acid, and production efficiency is improved; the preparation process is simple, no wasteacid is generated in the preparation process of pinacolone, and environmental pressure is relieved. A decoloring process is added after rectification, hydrochloric acid is prevented from being mixed in the product, and on the basis of ensuring purity of the product, the color and luster of the product can also be ensured, so that the colorless pinacolone product with purity higher than or equal to98% can be prepared.
Owner:南通鸿富达利化工有限公司

Treatment method for pinacolone chloride production tail gas

The invention discloses a treatment method for pinacolone chloride production tail gas, comprising the following steps: molecular capture: carrying out molecular capture on the tail gas by using an organic matter capture agent to obtain pinacolone chloride gas in the tail gas; falling film water absorption: absorbing hydrogen chloride gas in the tail gas by adopting a falling film water absorptionmethod to obtain a hydrogen chloride solution; alkali liquor absorption: carrying out alkali liquor absorption on the tail gas subjected to falling film water absorption, and removing unremoved hydrogen chloride gas in the tail gas; and activated carbon adsorption: physically adsorbing the tail gas by activated carbon to adsorb and remove harmful gases in the tail gas. The design is reasonable, and hydrogen chloride and organic gas are separated through molecular capture. Therefore, the difficulty of purifying the waste hydrochloric acid is greatly reduced. Resource reutilization is achievedthrough desorption regeneration, and the capture agent can be recycled, so that the waste gas treatment cost is saved. In addition, after the tail gas from pinacolone chloride production is fully absorbed and treated, the activated carbon treatment load is greatly reduced, and secondary pollution is reduced.
Owner:NJTECH ENVIRONMENT TECH CO LTD

Synthetic Method of 5,5-Dimethyl-2,4-Adipaldehyde-0,0-Boron Difluoride

This invention, which involves synthetic method of 5, 5- dimethyl-2, 4-adipaldehyde-0, 0-Boron difluoride, belongs to the field of organic synthesis. Synthetic method of 5, 5-dimethyl-2, 4-adipaldehyde-0, 0-Boron difluoride is to react pinacolone and boron trifluoride diethyl ether at low temperature, and then add aqueous alkaline solution in after treatment to extract product from ether, after that, separate fluid, condense organic phase and final product is obtained. Yield of this method is 2 to 3 times higher than that in literature, and apart from that, mild reaction condition, simple procedures, easy operation, and low cost make it easy for industrial production. The product can be used directly in next step reaction without any special purification.
Owner:BEIJING AGLAIA TECH DEV

Preparation method of pinacolone

The invention discloses a preparation method of pinacolone. The method includes: (1) isopentene addition reaction: adding isopentene into hydrochloric acid, performing heating for 4-6h to 25DEG C, then further conducting heating to 65DEG C for 4-6h, thus obtaining chloro-tert-pentane; and (2) condensation reaction of chloro-tert-pentane and formaldehyde: adding formaldehyde dropwise into chloro-tert-pentane for 4-6h, and performing heating at the same time to 88-90DEG C, then conducting heat preservation for 1.5-2.5h, and carrying out layering, thus obtaining a pinacolone crude product. The method provided by the invention can achieve high pinacolone yield up to 67% or more.
Owner:ZHANGJIAGANG CITY ZHENFANG CHEM

Pinacolone preparation method

The present invention discloses a pinacolone preparation method, which comprises that: (1) isoamyl alcohol is dewatered to prepare isoamylene, and the isoamylene and hydrochloric acid are subjected to an addition reaction to obtain chloroisopentane, wherein the reaction temperature is 5-25 DEG C, and the reaction time is 2-8 h; and (2) the chloroisopentane reacts with a methanol solution of sodium methoxide to obtain the pinacolone, wherein the reaction temperature is 0-60 DEG C, and the reaction time is 15-35 min. According to the present invention, the method has characteristics of simple process, low equipment requirement and low cost, and the purity of the product obtained through the method is more than or equal to 99.8%.
Owner:ZHANGJIAGANG CITY ZHENFANG CHEM
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