The global shift towards plant-based diets, coupled with the functional requirements of industrial food processing, has positioned Soy Protein Isolate (SPI) as the cornerstone of plant protein ingredients. Soy isolate protein powder is obtained by removing the soluble and insoluble non-protein components from defatted soybeans. It achieves a protein concentration of ≥90% on a moisture-free basis, presenting a virtually complete amino acid profile equivalent to animal sources (PDCAAS score of 1.0). This makes SPI the preferred functional substitute and fortifier across multiple sectors, including meat processing, vegan substitutes, sports beverages, and dairy alternatives.
According to recent agricultural and industrial market analyses, the global soy protein isolate market is expected to expand at a CAGR of 6.2% over the next decade. This growth is driven by the soaring demand for clean-label, allergen-conscious, and GMO-free proteins. Major food manufacturers in Europe, North America, and the Asia-Pacific region are increasingly demanding consistent gelation, higher oil-binding capacities, and rapid dispersion in liquid applications. As global supply chains face volatile pricing and logistical shifts, partnering with integrated producers like Shandong Kawah Oils has become critical to securing cost-effective, premium-grade ingredients.
Global consumers demand transparent sourcing. Our planting bases and IP (Identity Preserved) certification ensure complete traceability from seed to isolated powder, free from genetic modifications.
Different industrial applications require specific protein structures. We modify our isolates to emphasize gelling, emulsification, water-binding, or dispersion properties depending on your formula.
Our integrated agricultural model stabilizes supply. Large-scale global buyers mitigate market volatility by locking in annual contracts with our state-of-the-art production facilities.
Established in May 2003, Xinrui Group has grown into a diversified industrial powerhouse covering more than 1,000 mu. The group encompasses urban cogeneration, centralized heating, municipal gas supply, and deep agricultural processing divisions. Collectively, we process 500,000 tons of wheat flour and 180,000 tons of soybeans annually, resulting in an annual group output value of 2.8 billion Yuan.
Under our circular economy model, raw wheat is converted into wheat starch and vital wheat gluten. Starch B and pentosan are recycled for ethanol production and high-nutrient animal feeds, ensuring zero-waste efficiency. The group's production equipment, safety protocols, and quality metrics are at the vanguard of the national plant-protein industry.
As a core subsidiary of Xinrui Group, Shandong Kawah Oils Co., Ltd. (est. 2014, registered capital: 120 million Yuan) is a leading agricultural enterprise. Integrating planting, R&D, processing, and global trade, we process 180,000 tons of domestic Non-GMO soybeans annually.
Our extraction line sequentially yields Non-GMO soybean oil, low-temperature food-grade soy meal, isolated soy protein, and soy dietary fiber. Our facilities feature the advanced DACHUANYUAN spray drying tower, constituting the largest single-line soy isolate protein production facility in China. This scale enables us to offer exceptional consistency and cost efficiencies to global distributors.
Founded in 2011 with a registered capital of 6 million Yuan, Guanxian Ruichang Trading Co., Ltd. serves as the group's global trading engine. We directly export soy protein isolates, wheat gluten, soluble dietary fiber, vermicelli, and premium grade ethanol to overseas buyers.
Ruichang Trading handles over 70% of the group's wheat products and 60% of its soy product capacities. By integrating manufacturing with trade, we eliminate intermediaries, giving overseas buyers direct factory communication, customized product formulations, and simplified logistics.
Our facility's industry leadership is built on advanced manufacturing technologies. In our wheat gluten division, we utilize imported tri-canter separation technology. This closed-loop system isolates gluten from starch under strict sanitary conditions, preventing protein damage and preserving maximum vitality (viscoelasticity).
For our soy protein isolate division, we operate the state-of-the-art DACHUANYUAN spray drying system. Traditional spray dryers can expose protein molecules to heat stress, leading to denaturation and loss of solubility. Our system controls temperature and airflow to produce uniform, dispersible particles that retain their natural gelling and water-binding structures. This delivers the reliable batch-to-batch consistency that industrial food formulators require.
| Raw Material Input | Primary Processing Stage | Secondary Processing Output | Final Industrial Products |
|---|---|---|---|
| Non-GMO Chinese Soybeans | Low-temp defatting & oil extraction | Food-grade white soy meal flakes | Soy Protein Isolate (SPI), Soy Dietary Fiber (SDF) |
| High-Gluten Wheat Stalks | Tri-canter wet milling & separation | A-Starch & Vital Wheat Gluten slurry | Vital Wheat Gluten (VWG), Starch A, Pellets |
| Secondary Starch Streams | B-Starch fermentation & processing | Fermentation starches & pentosan | Superior Grade Ethyl Alcohol (95%/96%), Animal Feed |
Soy isolate protein powder is a highly functional ingredient tailored to meet specific industrial requirements. Our portfolio includes specialized grades designed for a wide range of applications:
These grades feature strong emulsifying capacity, helping bind water and fat in emulsified sausages, hot dogs, and canned meats. This maintains structural integrity, minimizes fat release during thermal processing, and improves texture and mouthfeel.
Designed for plant-based meat alternatives and traditional tofu production, these proteins feature high cohesive strength. They form elastic gel matrices that mimic the fibrous chewiness of meat, helping optimize texture and yield.
Formulated with very low viscosity under shear and high dispersion rates, these grades are ideal for injection into whole muscle meats like hams and bacon. They distribute evenly inside the tissue without clogging nozzles or forming pockets, improving moisture retention.
Engineered for high solubility and stability under neutral and acidic conditions, these grades disperse quickly with low sediment. This makes them ideal for RTD shakes, infant nutrition, and powdered sports beverages.
B2B procurement teams must verify that suppliers meet stringent functional and food safety standards. To help quality assurance and sourcing managers evaluate our products, we maintain consistent specifications across our core soy protein isolate grades:
| Quality Parameter | Standard Specification Target | Testing Methodology / Reference |
|---|---|---|
| Crude Protein (Dry Basis) | ≥ 90.0 % | Kjeldahl Method (N × 6.25) |
| Moisture Content | ≤ 7.0 % | Loss on Drying (105°C, 4 Hours) |
| Ash Content | ≤ 6.0 % | Muffle Furnace Ashing (550°C) |
| Fat Content | ≤ 1.0 % | Soxhlet Extraction |
| pH Value | 6.8 - 7.5 | 10% Aqueous Solution Potentiometric |
| Identity Preserved (IP) Status | 100% Non-GMO Soy Sourced | PCR Testing (SGS Certification) |
| Aerobic Plate Count | ≤ 10,000 cfu/g | GB/T 4789 Standard / ISO 4833 |
| Salmonella & E.coli | Negative / 25g | AOAC Official Methods / ISO 6579 |
Additionally, our logistics infrastructure handles bulk shipping requirements. We offer 20kg and 25kg multi-wall paper bags with heat-sealed PE inner liners, as well as 500kg and 1000kg jumbo bulk bags. These options help protect the product from moisture absorption during sea transport, ensuring it arrives in optimal condition.
Our operations comply with global quality standards. Shandong Kawah Oils and Guanxian Xinrui Industrial maintain accredited certifications to ensure compliance with international markets.
Our integrated milling and refining plants generate premium industrial starch and functional dietary fiber co-products. By utilizing the entire seed and grain structure, we ensure high resource recovery and product purity.
Xinrui Group
