Welan gum Description

Welan gum Description:
Welan Gum is an anionic polysaccharide with excellent thermal stability and retention of viscosity at elevated temperatures. Welan Gum exhibits superior temperature stability over 200° F in fresh water and low pH fluids. Welan Gum is a tan colored dry powder with a density of 26.25 lbs/ft³. Welan Gum is used in various industries where high molecular weight biopolymers are useful.

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, foundary coating, pigment suspensions, cement or concrete viscosifier, tire sealant and paint thickeners.

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

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Welan Gum is an anionic polysaccharide

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.
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.

Welan Gum

Storage information: Store in Cool and dry .place, keep away from strong light, high temperature
Usage: chemical reseach
Transportation：by air express delivery(DHL,FedEx,EMS ect.) or sea shipping (FOB,CIF,CFR,CNF ect.)
Sample：sample can be supplied if you inquiry
Price: we will give you the best price !
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Drilling mud additive for Welan gum

Drilling Mud Additive for welan gum polyacrylamide has very good performance in high temperature and salt resistance for oil drilling application.

Advantage
Keep very high viscosity in saline water
Bear with high temperature upto 150 celsius degree

Typical Properties
Appearance: White powder
Hydrolysis degree: 25%
UL Viscosity, CPS: 4.0-7.0
Molecular weight: 20-25MM
Solid content: 90min.

Drilling mud additive for Welan gum

Application & Storage
Recommended solution concentrations: 0.5%
Recommended storage periods: 2 years from receipt of goods in a cool and dry place
Stock solution: 24hours

Viscosity modifying Admixture

Welan gum is a good quality viscosity modifying admixture.The use of viscosity modifying admixtures (VMA) has proved to be very effective in stabilizing the rheological properties and consistency of self-compacting concrete (SCC). SCC is known for its excellent deformability, high resistance to segregation and use, without applying vibration, in congested reinforced concrete structures characterized by difficult casting conditions. Most of the commercial VMAs currently available in the market are costly and increase the price of such a concrete. Identification or production of new low-cost VMA is then essential. This paper presents the performance of four new polysaccharide-based VMAs in enhancing the rheological and consistency properties of cement paste.
The study of the rheological properties and consistency of cement paste to screen the dosage and type of new VMA to be used in SCC is a promising approach. Investigation was carried out on cement pastes with combinations of various dosages of new VMAs and of a superplasticizer (SP) to study the influence on rheology, consistency and washout mass loss. A commercial VMA designated in this paper as “COM” was tested for comparison. The study on new VMAs is encouraging and confirms that pastes with satisfactory rheological and consistency properties comparable with or even better than commercial VMA can be developed. The combined use of proper dosages of VMA and SP is shown to clearly contribute to securing high-performance cement pastes that is highly fluid yet cohesive enough to reduce water dilution and enhance water retention. Attempt has also been made to correlate rheological properties (yield stress) to consistency (slump) of pastes.

Viscosity modifying Admixture

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We are bio surfactant manufacturers

We are bio surfactant manufacturers,if you need this,please send us email.
The increased environmental awareness of consumers has led to a higher demand for the green/eco-friendly products. Prudent customers in mature markets demand green products made from renewable sources that are biodegradable and have less harmful effects on the environment as compared to products from petroleum origin. Surfactants constitute an important group of chemicals. They are used for manufacturing household and commercial cleaners, personal care and food products. Surfactants can be derived from both petrochemical feedstock and renewable resources.

bio surfactant manufacturers

In addition to increasing demand for products made from renewable resources, there are specific types of cosmetic ingredients being viewed critically by consumers. One example are certain types of ethoxylates (PEG-derivatives) for which industry is seeking replacement products. While there are existing surfactants which are partially (e. g. fatty acohol ethoxylates, fatty alcohol ether sulfates) or even fully (e. g. alkyl polyglucosides) derived from renewable resources, none of these fulfill all requirements in terms of cost, performance, renewable content, and environmental compatibility (e. g. biodegradability, ecotoxicity). SyntheZyme’s biosurfactant products close this gap by offering raw material flexibility in combination with novel, unique structures resulting in increased performance value in applications.

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Drilling mud additive for Welan gum

Drilling mud additive for Welan gum
Welan Gum is a biopolymer employed in food industry as thickener. This paper evaluates its performance as mud thickener and filtrate loss additive. Tests revealed that welan gum, even at low concentrations, effectively boosted mud viscosity and yield point. Tests were also conducted on carboxymethyl cellulose (CMC), a commonly used mud thickener. Compared with CMC, welan gum is more effective as mud thickener, but welan gum has no effect on mud filtrate loss. welan gum mud was also tested at elevated temperature. The viscosity of welan gum mud was stable under short-term and long-term heating. Sodium chloride and calcium chloride were added into welan gum mud. Test results showed welan gum mud was resilient to sodium and calcium contamination. welan gum has good potential as mud thickener under high temperature and high salinity conditions.
Drilling mud plays a critical role in the success of oil and gas drilling operations. It cools and lubricates drill bit, controls well pressure, transports and suspends cuttings. Mud must have a relatively high viscosity to effectively suspend cuttings. Therefore, mud thickeners are often added into mud to boost mud viscosity. The most widely used mud thickeners are carboxy methyl cellulose (CMC) and hydroxy ethyl cellulose (HEC).

Drilling mud additive for Welan gum

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Characteristics of Welan Gum

Characteristics of Welan Gum

1. can be dissolved in cold water, it presents regular and stable structure in aqueous solution,and forms the high viscosity solution.

2. has the characteristics of pseudoplastic flow (shear thinning effect),and a good ability of suspension in the stationary state.

3. It is relatively stable in the range of PH2-12 and has good salt tolerance.

4. welan gum can form a gel under the conditions of NaOH existence and heating, but the gel strength is very weak.

5. It has the thermal reversibility for the stability of temperature, the influence of temperature on the Welan gum is relatively small. Under the condition of 121 ℃ terilization for 15 minutes, its viscosity will not decrease. The viscosity of 0.4 xanthan gum solution has been zero when the temperature is 135℃ , but the vidcosity of welan gum solution was just close to zero under the same conditions when the temperature is up to 163℃. Under the normal conditions, the viscosity of welan gum solution will decrease with the the temperature increasing and with the temperature lowering, it can completely restore.

6. It has better compatibility with other gum.

Welan Gum

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