Bio surfactant is a biological macromolecules

Bio surfactant is a biological macromolecules with a surface activity to be produced by microorganisms with the special conditions (such as a suitable carbon and nitrogen sources, organic nutrients, PH value and temperature, etc ) Compared with the chemical synthesis of surfactants, Bio surfactant addition to reducing the surface tension, emulsion stability and increase the role of the same foam, but also with the advantages of non-toxic, biodegradable, etc , which chemical synthetic surfactants have no

Bio surfactant

Product Features:
Water-soluble, small solid adsorption;
Better resistance and residual resistance factor, reduce the interfacial tension, better wet ability and reversal for oil rock surface;
A plurality of biological macromolecules can bridge to completely block the throat at the same time, so that the water flow around;
Resistance to salinity 30000mg / L, temperature stable at 120 ℃;
Lower cost, applicability, especially for the presence of the interlayer and the inner heterogeneity of the EOR in the oilfields;
Non-toxic, safety, environmental;

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diutan gum in aqueous solution

Rheological properties of a new microbial polysaccharide, diutan gum in aqueous solution have been systematically investigated. It is found that molecular aggregates of diutan gum can be formed at a very low concentration (0.12 g/L), and the mechanism of thickening by diutan gum is proposed.
The viscosity retention rate of diutan gum changes little when increasing the temperature from 298 K to 348 K or in a high salinity solution (55.5 g L(-1)). Gel structure can be formed in the diutan gum solution, owing to the finding that the dynamic modulus has an exponential relationship with the concentration. The gel properties of diutan gum are not sensitive to temperature, and are virtually independent of cationic environment (Na(+) and Ca(2+)).
The temperature/salt tolerance of the diutan gum solution is mainly attributed to its perfect double helix molecular conformation, the location of the side chains of its molecules, and its water retention capacity.

diutan gum

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The origin of diutan gum

ATLANTA, Sept. 14, 2016 (GLOBE NEWSWIRE) -- CP Kelco, a leading global producer of specialty hydrocolloid solutions, announced today that its "diutan gum" has been approved by the United States Environmental Protection Agency (EPA) for use as an inert ingredient in agricultural chemical applications. As the leading manufacturer of diutan gum globally, CP Kelco can now offer this product for use in agricultural chemical applications for the US market.

The origin of diutan gum 

"This approval from the US EPA enables CP Kelco to introduce an innovative solution to the AgChem segment and reinforce our commitment to serving this segment, now and in the future," said Jérôme Béra, Senior Vice President of Global Marketing & Commercial at CP Kelco. "Diutan gum is one of the latest innovations in our specialty hydrocolloids portfolio to address opportunities and challenges in various industrial applications."
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Diutan gum is unique

We are a enterprise who dedicates to the research and development, production and sales of biological products.Diutan gum is a unique, anionic polymer produced by microbial fermentation. As a versatile rheology modifying agent, diutan gum is useful in a wide range of industrial applications, providing excellent stabilization, high pseudoplasticity and high viscosity at low-use concentrations.

CP Kelco also offers KELZAN(TM) AP and KELZAN(TM) S PLUS xanthan gums as ingredients for agricultural chemical applications; these offerings are part of the company`s portfolio of specialty xanthan gum products.

 Diutan gum

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need diutan gum contact us

Hebei Ebio Biotechnology Co., Ltd. is a chemical company.If you need diutan gum，please contact us.

 diutan gum

The viscosity-modifying admixtures (VMAs) contribute to the control of the rheology of grout and are used to enhance plastic viscosity, cohesion, stability, and resis¬tance to bleeding of cement-based systems. This paper reports the results of an investiga¬tion on the effect of VMAs, namely two types of diutan gums and a welan gum, on the rheology behavior of cement grouts. All mixtures were made with two types of superplas¬ticizers. The dosages VMAs were 0.05%, 0.10% and 0.15% with a fixed water-to-cement ratio of 0.40. The investigated fresh properties of the grouts included the mini-slump flow, Marsh cone flow time, plate cohesion, and rheology parameters: namely yield value and the plastic viscosity. Both rheological parameters were obtained using coaxial and vane viscometers. Two control grouts (with and without superplasticizer) were also tested and compared to mixtures containing VMAs. The results indicated that both types of diutan gums were better in controlling the grouts fresh properties and rheology compared to the welan gum.

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welan gum is thermally resistant biopolymer

Welan gum is a biopolysaccharide via Alcaligenes fermentation using starch oother carbohydrates by the method of biological engineering. It is a tetrasaccharide repeating unit consisting of D-glucose, D-glucuronic acid, L-rhamnose, and L-mannose. 

WELAN GUM is thermally resistant biopolymer for viscosity for viscosity and suspension control in industrial applications, it is stable up to 300ºF(150ºC)in water-based drilling, workover and completion fluids, with unique features for Lower Shear Rate Viscosity (LSRV) of drilling fluids and divalent ion tolerance

FEATURES
1. High viscosity under low concentration.
2. High viscosity under low rotation.
3. Fine moisture retention.
4. Peculiar stability under high salinity.
5. High temperature resistance.

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our products mainly used in Rheological modifiers

Our team can provide superior products and premium services with excellent design and production equipment to meet customers’needs;our products mainly used in Rheological modifiers.
Polar Activator: Dosage of polar activator (such as 95%ethanol, 95%methanol, 95%acetone or propylene carbonate) is 30%-40% by weight of HFGEL®120-Q.
It is always recommended to determine the proper level of addition by experiment. Either defect or excess of chemical activator would result
in poorer viscosity development.

Rheological modifiers

Recommended Procedures:
1)    Heat the specific oil to 60ºC~70ºC.
2)    Add HFGEL®120Q (10-15% by weight of total formula),mill for 5-10min.
3)    Add polar activator(30-40% by weight of organoclay), then add other additives,mill for 25-30min.
4)    Using pump for getting through colloid grinding or homogenizer.
5)    Remove air,filtrate and package.

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Welan gum used in Drilling mud additive

Welan gum used in Drilling mud additive
Functions
Control filtration rates and viscosity
Retard shale swelling and disintegration
Provide supplementary viscosity in water, sea water, and brine based fluids
Advantages
Good resistance to salt, can work in fresh water, salt water, brine based drilling fluids.
Can obtain desirable viscosity even at low dosage.
Can sustain high temperature up to 150 ºC.
Effective under moderate to high pH environment.
Don't need bactericide
Environment friendly

Drilling mud additive

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welan gum product introduction

welan gum product introduction
The main component of the efficient anti-segregation agent is a macromolecule microbial polymer. It shows good stability, excellent resistance to segregation, water retention and thicken effect and unique rheological properties. It can effectively prevent the mortar and concrete bleeding and segregation, even more could overcome the affect on strength introduced by traditional anti-segregation agents or thickeners. So it is particularly suitable for high-end building products such as grout, self-leveling mortar and self-compacting concrete, etc. Compared with traditional thickeners and anti-segregation agents, DR-1 also resolve the problems of measure and dispersion, stick knives, air bubbles and other issues, while DR2 overcomes many difficulties of traditional anti-segregation agents such as the strength problems and competitive adsorption with other additives.

SZB-660 has the characteristics of Thixotropic, water retention, and SZB-360 has the characteristics of Thickening,Thixotropic, they are mixed used for spray machine mortar

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Welan Gum other name biozan

Welan Gum is an anionic polysaccharide with excellent thermal stability and retention of viscosity at elevated temperatures.
Others name: Biozan; Kelco Crete.

Welan Gum exhibits superior temperature stability over 200°F in fresh water and low pH fluids. Fritz Welan Gum is a tan colored dry powder with a density of 26.25 lbs/ft3.

biozan

Welan Gum is used in various industries where high molecular weight biopolymers are useful. A short list of products containing Welan Gums include various oilfield applications, foundry coating, pigment suspensions, cement or concrete viscosifiers, tire sealants and paint thickeners.

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diutan gum and our company

Our products include diutan gum, welan gum, anti-high temperature biopolymers and so on.We are a enterprise who dedicates to the research and development, production and sales of biological products.Our team can provide superior products and premium services with excellent design and production equipment to meet customers'needs.

diutan gum

The production of a diutan polysaccharide exhibiting increased viscosity properties as compared with previously produced polysaccharide of the same type of repeating units. Such an improved diutan polysaccharide is produced through the generation of a derivative of Sphingomonas sp. ATCC 53159 that harbors a multicopy broad host range plasmid into which genes for biosynthesis of diutan polysaccharide have been cloned. The inventive methods of production of such an improved diutan polysaccharide, as well as the novel cloned genes required to produce the improved diutan within such a method, are also encompassed within this invention. Additionally, the novel engineered Sphingomonas strain including the needed DNA sequence is encompassed within this invention.

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Welan gum is a viscosity-enhancing admixture

Welan gum is a viscosity-enhancing admixture used to retain some of the free water in cement-based materials and modify flow properties. The incorporation of welan gum and super-plasticizer can enable the production of highly flowable, yet stable systems with relatively low yield value and moderate viscosity. Such flow characteristics are useful for proportioning underwater concrete, post-tensioning grout, and self-consolidating concrete. Despite recent advances in such technological areas, limited data are available on the effect of welan gum-superplasticizer combinations on physico-chemical characteristics and kinetics of cement hydration. The study reported here was undertaken to evaluate the influence of welan gum and a naphthalene-based superplasticizer on fresh and hardened properties of cement paste with 0.40 W/C. The performance of reference grouts made without any admixture and those made with super-plasticizer were compared to the performance of mixtures made with 0.025, 0.055 and 0.075% welan gum by mass of cement. The effect of the admixtures on consistency, rheological properties, and stability of cement paste as well as setting time and changes in heat flux are discussed in this paper. Test results on hardened cement paste involving mercury porosimetry, scanning electron microscopy, and compressive strength development are also given.

Welan gum

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Welan gum was provided by BDL Chemical Company in China

Welan gum was provided by BDL Chemical Company in China. Other materials included NaCl, CaCl2, and distilled water. Crude oil for EOR tests was supplied by an oil company. The dead oil viscosity was 5.5 cP at 25 °C, and 3.1 cP at 85 °C. Viscosity was measured with a torque-type viscometer at varied temperatures and shear rates. Oil recovery was measured with core flooding equipment.

The test matrix is given in Table 1. For the first group of tests, WLG was added to water at different concentrations and the viscosity was measured at varied shear rates. For the second group of tests, NaCl was added to WLG solution to test its tolerance for sodium ions. For the third group of tests, CaCl2 was added to WLG solution to test its tolerance for calcium ions. Fourthly, WLG solution was aged at 85 °C for 6 h to test its stability under long-term heating.

Welan gum

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Welan gum

Welan gum (WLG) is produced by fermentation of sugar by bacteria of the genus Alcaligenes. The molecule consists of repeating tetrasaccharide units with single branches of l-mannose or l-rhamnose (Rakitsky and Richey 1992). The molecular structure is presented in Fig. 1. It was reported that WLG exhibits good viscosity retention at elevated temperature, and in the presence of sodium ion (Chen 2007). WLG was patented to be used as cement additive (Allen et al. 1991) and water shutoff chemical (Hoskin et al. 1991). However, limited research has been conducted to investigate its effect on oil recovery. The objective of this study is to investigate the potential of WLG as a polymer for EOR.
Certain chemicals, such as polymers and surfactants, can be injected into reservoirs to improve oil recovery (Sheng 2010; Gao 2011). Polymer flooding is the most successful chemical EOR method. Large-scale polymer flooding projects are being carried out in China (Gao et al. 2014). This method is also being tried in Angola and Brazil (Morel et al. 2010; Bruno 2010). The most widely used polymer for commercial EOR projects is partially hydrolyzed polyacrylamide (HPAM). However, HPAM is rather sensitive to salinity and temperature (Gao 2013). The industry has been looking for a polymer that can tolerate high salinity and high temperature.

Welan gum

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We are welan gum manufacturers

We are welan gum manufacturers.Our team can provide superior products and premium services with excellent design and excellent production equipment to meet customers’needs ;
Polymer flooding is the most successful chemical enhanced oil recovery method. Large-scale commercial polymer flooding projects are being carried out in China. However, partially hydrolyzed polyacrylamide, the commonly-used polymer for polymer flooding projects is very sensitive to sodium and calcium ions. This limits the field applications of polymer flooding method. The industry longs for a polymer that can tolerate salinity and heat. Welan gum (WLG) is a promising biopolymer because of its performance under challenging conditions. This paper investigates the factors that influence the viscosity of Welan gum solution. Tests show that WLG maintains high viscosity under the attacks of sodium ion, calcium ion, high temperature and long-term heating. Core flooding tests reveal that WLG cannot effectively reduce residual oil saturation, but can reduce the time to reach residual oil saturation.

welan gum manufacturers

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Welan gum in dry mix mortar

Welan gum in dry mix mortar is a long chain naturally occurring polymer with excellent thermally resistance capability which is used to increase yields of water-based drilling mud. Welan gum can be stable up to 300°F (150°C) in water-based drilling, workover and completion fluids systems due to unique features for Lower Shear Rate Viscosity ( LSRV ) of drilling fluids and divalent ion tolerance. Welan gum has a slightly higher acid solubility than xanthan gum polymer. Bichain is one of reliable welan gum suppliers and manufacturers for oilfield drilling, workover fluids and oil well cementing. High quality welan gum like Biozan polymer.

Dry Mix Mortar

Welan is an environment friendly natural exopolysaccharide, produced fermentatively.
Structurally, it is composed of l-mannose, l-rhamnose, d-glucose, and d-glucuronic acid.
It is available commercially to use in cement compositions.
It also has commercial applications in oil-well drilling.
Present review is focused on welan gum production, purification, recovery and conformational characterization of welan gum.

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Diutan gum used in high performance concrete

Diutan gum is an acidic polysaccharide with a repeating unit of tetrasaccharide skeleton similar to gellan gum，it can used in high performance concrete.

Diutan gum is a polysaccharide which is used for the stabilization of emulsions, foams and suspensions. It is obtained by fermentation and is similar in the chemical structure of the xanthan gum.

Compared with xanthan gum, it is characterized by an even stronger pseudoplasticity. Already at very low use levels, high viscosities and good flow properties under shear as pumping or pouring can be achieved. Another outstanding feature is its excellent alkali resistance.

high performance concrete

Diutan gum is a unique, anionic polymer produced by microbial fermentation. As a versatile rheology modifying agent, diutan gum is useful in a wide range of industrial applications, providing excellent stabilization, high pseudoplasticity and high viscosity at low-use concentrations.

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Welan gum in waste material improvemen

Welan gum in waste material improvemen

Waste material improvemen

Description:
WELAN GUM is a high molecular weight biopolymer fermented by Alcaligenes bacteria. Compared to Xanthan gum, it provides better thermal stability and may be utilized in deep wells drilling.

Application:
WELAN GUM biopolyer is a high efficiency, pseudoplastic viscosifier and suspension agent used in water based drilling, workover and completion fluids. Welan gum is also used in hydraulic fracturing fluids and cementing grouts.

Physical requirements:
Appearance: tan colored powder
Moisture: 13% max
PH: 6.0-8.0
Bulk density: 500-700kg/m3

Packing:
WELAN GUM is packed in 25 kg paper sack, 20 or 40 sacks per pallet.

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