scholarly journals AVA Biochem, Pioneer in Industrial Biobased Furan Chemistry

2020 ◽  
Vol 74 (10) ◽  
pp. 776-778
Author(s):  
Stefan Krawielitzki
Keyword(s):  
High Purity ◽  
Industrial Production ◽  
Industrial Scale ◽  
Technical Grade ◽  
Food Industries ◽  
Platform Chemical ◽  
Grade 5 ◽  
Global Leader ◽  
Specialty Chemicals ◽  
Bulk Chemistry

Swiss-based AVA Biochem AG is the global leader in the industrial production and sale of the bio-based platform chemical 5-hydroxymethylfurfural (5-HMF), a renewable and non-toxic alternative to a range of petroleum-based materials. 5-HMF has a broad range of applications in the chemical, pharmaceutical and food industries. Since 2014 AVA Biochem has been producing high-purity 5-HMF for research purposes and specialty chemicals markets, as well as technical-grade 5-HMF for bulk chemistry applications. AVA Biochem's own R&D department also develops the downstream chemistry of 5-HMF and thus opens the door to biobased furan chemistry on an industrial scale.

Application of pure, thermostable, alkali-tolerant xylanase in bleaching of oxygen-delignified pine kraft pulp

TAPPI Journal ◽  
2015 ◽  
Vol 14 (11) ◽  
pp. 689-694
Author(s):  
QINGZHI MA ◽  
QI WANG ◽  
CHU WANG ◽  
NIANJIE FENG ◽  
HUAMIN ZHAI
Keyword(s):  
Intrinsic Viscosity ◽  
Chlorine Dioxide ◽  
High Purity ◽  
Kraft Pulp ◽  
Alkaline Media ◽  
Industrial Scale ◽  
Elemental Chlorine ◽  
Effect Of Oxygen ◽  
Alkaline Tolerant ◽  
Ecf Bleaching

The effect of oxygen (O2)-delignified pine kraft pulp pretreatment by high-purity, thermostable, and alkaline-tolerant xylanases on elemental chlorine free (ECF) bleaching of O2-delignification kraft pulp was studied. The study found that xylanase pretreatment preserved the intrinsic viscosity and yield of O2-delignified pulp while causing about 7% of delignification with high delignification selectivity. The xylanases with high purity, higher thermostability (75°C~80°C) in highly alkaline media (pH 8.0~9.5) could be applied on an industrial scale. Pulp pretreatment by the high-purity, thermostable, and alkaline tolerant xylanases could improve pulp brightness or reduce the chlorine dioxide (ClO2) consumption. In a D0ED1D2 bleaching sequence using the same amount of ClO2, the xylanase-pretreated pulp obtained a higher brightness (88.2% vs. 89.7% ISO) at the enzyme dose of 2 U/g pulp; or for the same brightness as control (88.2% ISO), the ClO2 dosage in the D0 stage was reduced by 27%, which represents a 16% savings in total ClO2 used for bleaching.

scholarly journals Scalable Synthesis of High-Purity (R, R)-Dexmethylphenidate Free Base

2016 ◽  
Vol 8 (4) ◽  
pp. 28 ◽  
Author(s):  
Guan Wang ◽  
Dongsheng Chen ◽  
Yuanyuan Sun ◽  
Qing Cao ◽  
Bonan Li ◽  
...  
Keyword(s):  
Amino Acid ◽  
High Purity ◽  
Industrial Production ◽  
Acid Ester ◽  
Substitution Reaction ◽  
Practical Method ◽  
Amino Acid Ester ◽  
Free Base ◽  
Hydrochloride Salt ◽  
Scalable Synthesis

<p>A practical method for the preparation of high-purity (<em>R, R</em>)-dexmethylphenidate free base was developed. The method involves a substitution reaction of 2-chloropyridine and phenylacetonitrile via hydrolysis followed by hydrogenation, configuration inversion, chiral resolution, methyl esterification, and salification to give high-purity dexmethylphenidate hydrochloride. The hydrochloride salt was then neutralized by powder sodium hydroxide overnight to give dexmethylphenidate free base with over 99% purity. This method can be used for the industrial production of the dexmethylphenidate patch API, which could also be further applied for the preparation of other types of amino acid ester free bases.</p>

scholarly journals Functional Materials Produced On An Industrial Scale

2015 ◽  
Vol 36 (1) ◽  
pp. 19-30
Author(s):  
Justyna Barska ◽  
Sylwester Kłysz
Keyword(s):  
Smart Materials ◽  
Industrial Production ◽  
Functional Materials ◽  
Industrial Scale ◽  
Wide Range ◽  
Basic Characteristics

AbstractThe article presents a wide range of applications of functional materials and a scale of their current industrial production. These are the materials which have specific characteristics, thanks to which they became virtually indispensable in certain constructional solutions. Their basic characteristics, properties, methods of production and use as smart materials were described.

scholarly journals Industrial Production Method of High Purity Dialkylphosphate

1990 ◽  
Vol 39 (5) ◽  
pp. 346-350
Author(s):  
Tomihiro KUROSAKI ◽  
Norio NISHIGAWA ◽  
Akira MATSUNAGA
Keyword(s):  
High Purity ◽  
Industrial Production ◽  
Production Method

scholarly journals A Look at the Industrial Production of Olefins Based on Naphtha Feed: A Process Study of a Petrochemical Unit

2021 ◽  
Author(s):  
Reza Davarnejad ◽  
Jamal Azizi ◽  
Shaghayegh Bahari
Keyword(s):  
Natural Gas ◽  
Crude Oil ◽  
Production Process ◽  
Industrial Production ◽  
Raw Materials ◽  
Production Unit ◽  
Industrial Scale ◽  
Ethylene Propylene ◽  
Liquid Feed ◽  
Process Study

Olefins (ethylene, propylene and butadiene) as raw materials play an important role in a lot of chemical and polymer products. In industrial scale, there are several techniques from crude oil, natural gas, coal and methanol for the olefins production. Each of these has some advantages. The petrochemicals with liquid feed can simultaneously produce all of the olefins. Shazand Petrochemical Co. (as the first olefins production unit in Iran) produces all of the olefins using naphtha (light and heavy) feed. In this chapter, the production process of olefins based on naphtha will be studied from the beginning to the end (involving pyrolysis, compression, chilling and fractionation processes).

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